Analog Devices DC2342A LT3762 60V Synchronous Boost LED Controller Demo Manual
LT3762 60V synchronous boost LED controller demo board driving 32V/2A LED strings. Features SSFM, internal/external PWM dimming, and high efficiency for power step-up applications.
Overview
Demonstration circuit DC2342A evaluates the LT3762, a 60V synchronous boost LED controller designed for high-power applications. The circuit drives a single LED string at 2A with a forward voltage up to 32V from a 7V to 28V input, and remains operational down to 4V with reduced output current. It operates at 300kHz and features Spread Spectrum Frequency Modulation (SSFM) to minimize EMI. The design supports multiple dimming options including analog, external PWM, and internally generated PWM dimming. It provides protection against open and short LED conditions with dedicated fault flags and achieves efficiency up to 94.7%.
Use Cases
- High power step-up LED lighting
- Automotive LED headlamps
- Industrial lighting systems
- EMI-sensitive LED driver applications
Topics
Referenced Parts
575-4
KEYSTONE
JACK, BANANA
LT3762EUFD#PBF
Linear Technology
I.C., LED CONTROLLER, 28QFN-4X5
50CE100BS
SUN ELEC.
CAP., ALUM., 100μF, 50V, 20%
RL3264R-R120-F
SUSUMU
RES., SENSE, 0.120Ω, 1W, 1%, 2512
62000421121
Wurth Elektronik
HEADER 2X2 0.079" DOUBLE ROW
62000621121
Wurth Elektronik
HEADER 2X3 0.079" DOUBLE ROW
CIN4
Wurth Elektronik
10uH | 74435561100 | Wurth Elektronik | CIN4 | 10uF
PG-TDSON-8
Infineon
9 2 M1, M2 N-MOSFET, PG-TDSON-8 INFINEON, BSC019N04LS
POWERPAK-1212-8-S
Vishay
10 1 M5 P-MOSFET, POWERPAK-1212-8-S VISHAY, SIS443DN-T1-GE3
18.30mm
Wurth Elektronik
7 1 L1 IND., 10μH, 18.30mm WURTH ELEKTRONIK, 74435561100
5.0mm
Wurth Elektronik
8 1 L2 IND., 47μH, 5.0mm WURTH ELEKTRONIK, 74408942470
| 0603ZC103KAT2A | AVX | CAP., CER., 10nF, X7R, 10V, 10%, 0603 |
| 0603ZC104KAT2A | AVX | CAP., CER., 0.1μF, X7R, 10V, 10%, 0603 |
| BSC019N04LS | Infineon | N-MOSFET, PG-TDSON-8 |
| 2308-2-00-80-00-00-07-0 | Mill-Max | TESTPOINT, TURRET, 0.061" |
| 2501-2-00-80-00-00-07-0 | Mill-Max | TESTPOINT, TURRET, 0.094" |
| GRM155R71A104KA01D | Murata | CAP., CER., 0.1μF, X7R, 10V, 10%, 0402 |
| GRM188R61H105KAALD | Murata | CAP., CER., 1μF, X5R, 50V, 10%, 0603 |
| GRM188R71E474KA12D | Murata | CAP., CER., 0.47μF, X7R, 25V, 10%, 0603 |
| GRM188R71H682KA01D | Murata | CAP., CER., 6.8nF, X7R, 50V, 10%, 0603 |
| GRM32ER71H106KA12L | Murata | CAP., CER., 10μF, X7R, 50V, 10%, 1210 |
| PMEG4010CEJ | Nexperia | DIODE, SCHOTTKY, 40V, 1A, SOD323F |
| KRL6432E-M-R003-F-T1 | Susumu | RES., SENSE, 0.003Ω, 3W, 1%, 2512 (WIDE) |
| C1608X5R1A106K080AC | TDK | CAP., CER., 10μF, X5R, 10V, 10%, 0603 |
| CRCW0402100KJNED | Vishay | RES., 100k, 1/16W, 5%, 0402 |
| CRCW0603100KJNEA | Vishay | RES., 100k, 1/10W, 5%, 0603 |
| CRCW06031M00FKEA | Vishay | RES., 1M, 1/10W, 1%, 0603 |
| CRCW0603205KFKEA | Vishay | RES., 205k, 1/10W, 1%, 0603 |
| CRCW0603226KFKEA | Vishay | RES., 226k, 1/10W, 1%, 0603 |
| CRCW060328K0FKEA | Vishay | RES., 28.0k, 1/10W, 1%, 0603 |
| CRCW06032K20JNEA | Vishay | RES., 2.2k, 1/10W, 5%, 0603 |
| CRCW060336K5FKEA | Vishay | RES., 36.5k, 1/10W, 1%, 0603 |
| CRCW0603499KFKEA | Vishay | RES., 499k, 1/10W, 1%, 0603 |
| SIS443DN-T1-GE3 | Vishay | P-MOSFET, POWERPAK-1212-8-S |
| PMEG4020EP | Nexperia | DIODE, OPTION, SOD-128 (referenced in schematic) |
| 60800213421 | Wurth Electronics | SHUNT, 0.079" CENTER |
| 74408942470 | Wurth Electronics | IND., 47μH, 5.0mm |
| 74435561100 | Wurth Electronics | IND., 10μH, 18.30mm |
| 575-4 | KEYSTONE | JACK, BANANA |
| LT3762EUFD#PBF | Linear Technology | I.C., LED CONTROLLER, 28QFN-4X5 |
| 50CE100BS | SUN ELEC. | CAP., ALUM., 100μF, 50V, 20% |
| RL3264R-R120-F | SUSUMU | RES., SENSE, 0.120Ω, 1W, 1%, 2512 |
| 62000421121 | Wurth Elektronik | HEADER 2X2 0.079" DOUBLE ROW |
| 62000621121 | Wurth Elektronik | HEADER 2X3 0.079" DOUBLE ROW |
| CIN4 | Wurth Elektronik | 10uH | 74435561100 | Wurth Elektronik | CIN4 | 10uF |
| PG-TDSON-8 | Infineon | 9 2 M1, M2 N-MOSFET, PG-TDSON-8 INFINEON, BSC019N04LS |
| POWERPAK-1212-8-S | Vishay | 10 1 M5 P-MOSFET, POWERPAK-1212-8-S VISHAY, SIS443DN-T1-GE3 |
| 18.30mm | Wurth Elektronik | 7 1 L1 IND., 10μH, 18.30mm WURTH ELEKTRONIK, 74435561100 |
| 5.0mm | Wurth Elektronik | 8 1 L2 IND., 47μH, 5.0mm WURTH ELEKTRONIK, 74408942470 |