LT3762 60V Synchronous Boost LED Controller
Analog Devices Inc.
Demonstration circuit DC2342A is a 60V synchronous boost LED controller featuring the LT®3762. It drives a single string of LEDs at 2A up to 32V when VIN is between 7V and 28V. It runs down to 4VIN with reduced ILED and can withstand VIN transients as high as 30V. DC2342A runs at approximately 300kHz switching frequency. Spread spectrum frequency modulation (SSFM) can be turned on with a simple jumper, reducing EMI. DC2342A is designed for high power step-up LED controller applications that require excellent efficiency across the VIN range. This demonstration circuit is protected against both open and short LED conditions, each having its own flag.
The LT3762 has an input range from 2.5V to 42V. It has an adjustable switching frequency between 100kHz and 1MHz. Enabling SSFM spreads the switching frequency from fSW down to fSW – 30% for reduced EMI. SSFM speed is set by placing a capacitor from the SSFM pin of the LT3762 to ground, and can be disabled by shorting this pin to GND. DC2342A has a simple jumper option to enable/disable spread spectrum frequency modulation.
The LT3762 can be PWM dimmed with an external PWM signal, as well as an internally generated PWM signal. A capacitor from PWM to GND of the LT3762 sets the PWM
frequency, while the PWM duty cycle is determined by the voltage on the DIM terminal. Between 0V and 3V, VDIM gives between 0.4% and 97% PWM duty cycle. DC2342A has a jumper that can be set to switch between internally generated PWM signal, externally generated PWM signal, and no PWM signal (100% on). When run with both PWM dimming and spread spectrum enabled, the spread spectrum aligns itself with the PWM signal for flicker free operation. DC2342A can also be analog dimmed by placing a voltage source at either of its two CTRL turrets.
Small ceramic input and output capacitors are used to save space and cost. The open LED overvoltage protection uses the IC’s constant voltage regulation loop to regulate the output to approximately 35.5V if the LED string is opened, although it may reach almost 40V peak during the transient caused by an open circuit. There is a protection
diode from LED+ to GND to prevent negative ringing during a short-circuit.
Undervoltage lockout can be adjusted on the circuit with a few simple resistor choices. Further modifications can be made to DC2342A to reconfigure the circuit from a boost topology to operate as a buck-mode or buck-boost mode LED driver. Please consult the factory for details.
The LT3762 data sheet gives a complete description of the part, operation and applications information. The data sheet must be read in conjunction with this Demo Manual for demonstration circuit DC2342A. The LT3762EUFD is assembled in a 28-lead plastic 4mm × 5mm QFN package with a thermally enhanced ground pad. Proper board layout is essential for maximum thermal performance. See the data sheet section Layout Considerations.
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | DC2342A-ND | 1 | $176.55 | $176.55 | $176.55 | $176.55 | $176.55 | $176.55 | |
Analog Devices Inc | DC2342A | 0 | $176.55 | $176.55 | $176.55 | $176.55 | $176.55 | $176.55 | |
Mouser Electronics | 584-DC2342A | 5 | 1 | $182.71 | $182.71 | $182.71 | $182.71 | $182.71 | $182.71 |
LTM8040EV Demo Board | µModule Buck LED Driver, 4V ≤ VIN ≤ 36V, VLED up to 13V @ 1A
Analog Devices Inc.
Demo circuit DC1274A features the LTM8040 36V, 1A step-down constant current μModule® LED driver. The demonstration circuit is designed to drive a single LED or string of LEDs at up to 1A from a wide input voltage range of 4V to 36V. The maximum LED string voltage is 13V and the minimum voltage varies depending upon the BIAS pin supply arrangement.
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc | DC1274A | 0 | $76.50 | $76.50 | $76.50 | $76.50 | $76.50 | $76.50 | |
Mouser Electronics | 584-DC1274A | 8 | 1 | $79.18 | $79.18 | $79.18 | $79.18 | $79.18 | $79.18 |
LT3517EUF | Boost LED Driver, 3V ≤ PVIN ≤ 40V, VLED up to 40V @ 330mA
Analog Devices Inc.
Demonstration Circuit 1279 is a full-featured, multitopology LED driver with 1.5A switch current featuring the LT3518. The board is optimized to drive a 330mA LED string with a total LED voltage between the input voltage and 40V in a boost topology. The input voltage range (VIN) is 3V to 30V, and the supply pin that powers the switcher (PVIN) has an input voltage range of 3V to 40V.
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc | DC1279A | 0 | $117.70 | $117.70 | $117.70 | $117.70 | $117.70 | $117.70 | |
Mouser Electronics | 584-DC1279A | 0 | 1 | $121.81 | $121.81 | $121.81 | $121.81 | $121.81 | $121.81 |
Evaluation Module for TPS65170 LCD Bias Supply
Texas Instruments
Evaluation Module for TPS65170 LCD Bias Supply
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | 296-50134-ND | 1 | 1 | $58.80 | $58.80 | $58.80 | $58.80 | $58.80 | $58.80 |
Arrow North American Components | TPS65170EVM-559 | 0 | 1 | $61.14 | $58.64 | $58.64 | $57.69 | $57.01 | $57.01 |
AVNET Express | TPS65170EVM-559 | 0 | 1 | $59.78 | $59.78 | $59.78 | $59.78 | $59.78 | $59.78 |
Mouser Electronics | 595-TPS65170EVM-559 | 3 | 1 | $64.85 | $64.84 | $64.84 | $64.84 | $64.84 | $64.84 |
Texas Instruments | TPS65170EVM-559 | 24 | 1 | $49.00 | $49.00 | $49.00 | $49.00 | $49.00 | $49.00 |
Verical Marketplace | TPS65170EVM-559 | 25 | 1 | $56.74 | $56.71 | $53.91 | $53.91 | $53.91 | $53.91 |
TPS65132B Dual Output LCD Bias for Smartphones Evaluation Module
Texas Instruments
TPS65132B Dual Output LCD Bias for Smartphones Evaluation Module
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | 296-49341-ND | 3 | 1 | $58.80 | $58.80 | $58.80 | $58.80 | $58.80 | $58.80 |
AVNET Express | TPS65132BEVM | 0 | 1 | $59.78 | $59.78 | $59.78 | $59.78 | $59.78 | $59.78 |
Mouser Electronics | 595-TPS65132BEVM | 1 | 1 | $64.85 | $64.84 | $64.84 | $64.84 | $64.84 | $64.84 |
Texas Instruments | TPS65132BEVM | 10 | 1 | $49.00 | $49.00 | $49.00 | $49.00 | $49.00 | $49.00 |
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | 296-38416-ND | 0 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | |
Mouser Electronics | 595-MSPBNDLFR5969LCD | 0 | 1 | $0.00 | |||||
Newark | MSP-BNDL-FR5969LCD | 0 | 1 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 |
Win Source | MSP-BNDL-FR5969LCD | 1 | 1 |
Synchronous Boost Dual LED Flash Driver Evaluation Module W/ 1.5A High-Side Current Sources
Texas Instruments
Synchronous Boost Dual LED Flash Driver Evaluation Module W/ 1.5A High-Side Current Sources
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | 296-49210-ND | 0 | 1 | $178.80 | $178.80 | $178.80 | $178.80 | $178.80 | $178.80 |
AVNET Express | LM3643EVM | 0 | 1 | $181.78 | $181.78 | $181.78 | $181.78 | $181.78 | $181.78 |
Mouser Electronics | 595-LM3643EVM | 3 | 1 | $197.19 | $197.19 | $197.19 | $197.19 | $197.19 | $197.19 |
Texas Instruments | LM3643EVM | 32 | 1 | $149.00 | $149.00 | $149.00 | $149.00 | $149.00 | $149.00 |
1.2A Dual Flash LED Driver System with I2C Compatible Interface
Texas Instruments
1.2A Dual Flash LED Driver System with I2C Compatible Interface
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | LM3553SDEV-ND | 4 | 1 | $178.80 | $178.80 | $178.80 | $178.80 | $178.80 | $178.80 |
Arrow North American Components | LM3553SDEV | 0 | 1 | $185.90 | $178.30 | $178.30 | $175.54 | $172.44 | $172.44 |
AVNET Express | LM3553SDEV | 0 | 1 | $181.78 | $181.78 | $181.78 | $181.78 | $181.78 | $181.78 |
element14 APAC | LM3553SDEV | 1 | 1 | * $238.23 | * $238.23 | * $238.23 | * $238.23 | * $238.23 | * $238.23 |
Farnell | LM3553SDEV | 1 | 1 | * $187.87 | * $187.87 | * $187.87 | * $187.87 | * $187.87 | * $187.87 |
Mouser Electronics | 926-LM3553SDEV | 0 | 1 | $197.19 | $197.19 | $197.19 | $197.19 | $197.19 | $197.19 |
Newark | LM3553SDEV | 1 | 1 | $153.41 | $153.41 | $153.41 | $153.41 | $153.41 | $153.41 |
Texas Instruments | LM3553SDEV | 23 | 1 | $149.00 | $149.00 | $149.00 | $149.00 | $149.00 | $149.00 |
Verical Marketplace | LM3553SDEV | 4 | 1 | $212.86 | $172.43 | $172.43 | $172.43 | $172.43 | $172.43 |
TLC6C5712 12 Channels Linear Constant Current LED Driver Evaluation Module
Texas Instruments
TLC6C5712 12 Channels Linear Constant Current LED Driver Evaluation Module
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | TLC6C5712EVM | 2 | $178.80 | $178.80 | $178.80 | $178.80 | $178.80 | $178.80 | |
Arrow North American Components | TLC6C5712EVM | 0 | $185.90 | $178.12 | $178.12 | $174.39 | $172.50 | $151.06 | |
AVNET Express | TLC6C5712EVM | 0 | $181.78 | $181.78 | $181.78 | $181.78 | $181.78 | $181.78 | |
Mouser Electronics | TLC6C5712EVM | 2 | $197.19 | $197.19 | $197.19 | $197.19 | $197.19 | $197.19 | |
Texas Instruments | TLC6C5712EVM | 10 | $149.00 | $149.00 | $149.00 | $149.00 | $149.00 | $149.00 | |
Verical Marketplace | TLC6C5712EVM | 3 | $189.71 | $168.07 | $163.92 | $163.92 | $163.92 | $163.92 |
LM3642 1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board
Texas Instruments
LM3642 1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board
Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
---|---|---|---|---|---|---|---|---|---|
DigiKey | 296-49717-ND | 2 | 1 | $58.80 | $58.80 | $58.80 | $58.80 | $58.80 | $58.80 |
Arrow North American Components | LM3642TL-LTEVM | 0 | 1 | $61.14 | $58.55 | $58.55 | $57.15 | $56.46 | $56.46 |
AVNET Express | LM3642TL-LTEVM | 0 | 1 | $59.78 | $59.78 | $59.78 | $59.78 | $59.78 | $59.78 |
Mouser Electronics | 595-LM3642TL-LTEVM | 3 | 1 | $64.85 | $64.85 | $64.85 | $64.85 | $64.85 | $64.85 |
Texas Instruments | LM3642TL-LTEVM | 17 | 1 | $49.00 | $49.00 | $49.00 | $49.00 | $49.00 | $49.00 |
Verical Marketplace | LM3642TL-LTEVM | 25 | 1 | $71.01 | $67.12 | $66.22 | $66.22 | $66.22 | $66.22 |
Win Source | LM3642TL-LTEVM | 350 | 1 |