| 
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ2000PW
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ27350PWR
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Intersil
                                        ISL9228IRZ
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ20Z40PWR-R1
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ294504DRVR
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ2028YZGR
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        LM3658SDX/NOPB
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        UC2909DW
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ2084DBTR-V143
                                     
                                 | 
                                                                
                                    
                                                                                 
                                                                            
                                    
                                        Texas Instruments
                                        BQ24031RHLRG4
                                     
                                 | 
                                                            
                                                    
                                | Price | 
                                 | 
                                                                $3.17 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                $0.38 | 
                                                                 | 
                                                                $0.51 | 
                                                                 | 
                                                                 | 
                                                                $2.03 | 
                                                            
                                                    
                                | RoHS | 
                                 | 
                                                                Yes | 
                                                                Yes | 
                                                                Compliant | 
                                                                Yes | 
                                                                Yes | 
                                                                Yes | 
                                                                Compliant | 
                                                                Compliant | 
                                                                Compliant | 
                                                                Compliant | 
                                                            
                                                    
                                | Lead Status | 
                                 | 
                                                                Yes | 
                                                                Yes | 
                                                                No | 
                                                                Yes | 
                                                                Yes | 
                                                                Yes | 
                                                                No | 
                                                                No | 
                                                                No | 
                                                                No | 
                                                            
                                                    
                                | Absolute Vin (safety rating)(Max)((V)) | 
                                 | 
                                                                7 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                6.5 | 
                                                                 | 
                                                                 | 
                                                                18 | 
                                                            
                                                    
                                | Operating Vin(Min)(V) | 
                                 | 
                                                                4 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                4.35 | 
                                                            
                                                    
                                | Approx. Price (US$) | 
                                 | 
                                                                1.45 | 1ku | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                0.24 | 1ku | 
                                                                0.50 | 1ku | 
                                                                0.45 | 1ku | 
                                                                 | 
                                                                 | 
                                                                1.80 | 1ku | 
                                                            
                                                    
                                | Battery Charge Voltage(Min)(V) | 
                                 | 
                                                                0 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                4.1 | 
                                                            
                                                    
                                | Control Interface | 
                                 | 
                                                                Standalone (RC-Settable) | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Standalone (RC-Settable) | 
                                                                 | 
                                                                 | 
                                                                Standalone (RC-Settable) | 
                                                            
                                                    
                                | Special Features | 
                                 | 
                                                                Temp Monitoring (Thermistor Pin) | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Programmable EEPROM or EPROM | 
                                                                LDO,Temperature sense | 
                                                                Temp Monitoring (Thermistor Pin),Thermal Regulation | 
                                                                 | 
                                                                 | 
                                                                Integrated LDO,Power Path,Temp Monitoring (Thermistor Pin) | 
                                                            
                                                    
                                | Battery Charge Voltage(Max)(V) | 
                                 | 
                                                                20 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                4.1 | 
                                                            
                                                    
                                | Operating Vin(Max)(V) | 
                                 | 
                                                                6 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                6 | 
                                                                 | 
                                                                 | 
                                                                16 | 
                                                            
                                                    
                                | USB Feature | 
                                 | 
                                                                N/A | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                N/A | 
                                                            
                                                    
                                | Package Group | 
                                 | 
                                                                PDIP,SOIC,TSSOP | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                WSON | 
                                                                DSBGA | 
                                                                WSON | 
                                                                 | 
                                                                 | 
                                                                VQFN | 
                                                            
                                                    
                                | Package Size | 
                                 | 
                                                                mm2 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                mm2 | 
                                                                 | 
                                                                 | 
                                                                mm2 | 
                                                            
                                                    
                                | Cell Chemistry | 
                                 | 
                                                                Li-Ion/Li-Polymer,NiCd,NiMH | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Li-Ion/Li-Polymer | 
                                                                 | 
                                                                 | 
                                                                Li-Ion/Li-Polymer | 
                                                            
                                                    
                                | # Series Cells | 
                                 | 
                                                                1,2,3,4 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                1 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Control Topology | 
                                 | 
                                                                Switch-Mode Buck | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Linear | 
                                                            
                                                    
                                | Charge Current(Max)(A) | 
                                 | 
                                                                2 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                1 | 
                                                                 | 
                                                                 | 
                                                                1.5 | 
                                                            
                                                    
                                | Function | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Protection | 
                                                                Authentication or ID | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Rating | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Catalog | 
                                                                Catalog | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Number of Series Cells(Min) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                2 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Communication Interface | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                No Communication | 
                                                                HDQ | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Typical Operating Current(Typ)(uA) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                1 | 
                                                                2 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Number of Series Cells(Max) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                3 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Protection Feature(s) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Over-voltage (OV) | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Vin(Max)(V) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                25 | 
                                                                4.5 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | # Series Cells (Min) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                1 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | # Series Cells (Max) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                1 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Charging Control Topology | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                Linear Charger | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Battery Charge Voltage(V) | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                4.2 (Fixed) | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                            
                                                    
                                | Number of Series Cells | 
                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                 | 
                                                                1 |