LXHL-PW09
Lumileds
Lumileds’ LXHL-PW09 Luxeon III LED emitter has an exposed pad slug for thermal enhancement.
Design DocumentAnalog
DC773A: Synchronous 1MHz Luxeon III White LED Driver Design Guide
1MHz synchronous buck-boost LED driver using LTC3441 and LTC2050 to drive Luxeon III white LEDs at 1000mA from a 3V-4.2V Li-ion input.
Overview
The DC773A demonstration circuit is a synchronous buck-boost LED driver featuring the LTC3441 and LTC2050. It is optimized for driving a Lumileds Luxeon III white LED (LXHL-PW09) at a constant 1000mA load current from a single lithium-ion battery input (3V to 4.2V). The LTC3441 provides high-frequency power conversion at 1MHz, allowing for compact surface-mount components, while the LTC2050 op-amp ensures precise current control with minimal power loss in the sense resistor. The design supports manual activation via pushbutton, PWM dimming, and external synchronization between 1.15MHz and 1.7MHz.
Use Cases
- Handheld mobile devices
- LED flash applications
- Portable battery-powered lighting
- High-power white LED illumination
Topics
LTC3441
LTC2050
Luxeon III
LXHL-PW09
buck-boost converter
LED driver
synchronous converter
DC773A
white LED driver
lithium-ion
Referenced Parts
CR05-513JM
AAC
RES, 51K OHMS 5% 1/16W 0402 AAC CR05-513JM
LTC2050IS5
Linear Technology
The five-pin LTC2050IS5 is used for minimum components and minimum pins
LTC3441EDE
Linear Technology
LTC3441EDE, SYNCHRONOUS 1MHz LUXEON III WHITE LED DRIVER
2501-2
Mill-Max
TURRETS MILL-MAX-2501-2
PMEG2010EA
Philips
DIODE, SCHOTTKY BARRIER PHILIPS PMEG2010EA
RL1220TR033F
Thin-Film
RES, 0.033 OHMS 1% 1/16W 0805 THIN-FILM RL1220TR033F
LTC2050IS6
Linear Technology
Replace LTC2050IS5 with LTC2050IS6 for low quiescent current during LED OFF.
| LXHL-PW09 | Lumileds | Lumileds’ LXHL-PW09 Luxeon III LED emitter has an exposed pad slug for thermal enhancement. |
| EVQPJS05K | Panasonic | SWITCH, MOMENTARY, PUSH BUTTON PANASONIC EVQ PJS 05K |
| CDRH5D18-4R1 | Sumida | INDUCTOR, 4.1uH SUMIDA CDRH5D18-4R1 |
| C2012X5R0J106M | TDK | CAP, X5R 10uF 6.3V 20% 0805 TDK C2012X5R0J106M |
| JMK316BJ226ML-T | Taiyo Yuden | CAP, X5R 22uF 6.3V 20% 1206 TAIYO YUDEN JMK316BJ226ML-T |
| C2012X5R0J106M | TDK | 1 1 C1 CAP, X5R 10uF 6.3V 20% 0805 TDK C2012X5R0J106M |
| JMK316BJ226ML-T | Taiyo Yuden | 3 1 C3 CAP, X5R 22uF 6.3V 20% 1206 TAIYO YUDEN JMK316BJ226ML-T |
| CR05-1002FM | AAC | RES, 10.0K OHMS 1% 1/16W 0402 AAC CR05-1002FM |
| CR05-1003FM | AAC | RES, 100K OHMS 1% 1/16W 0402 AAC CR05-1003FM |
| CR05-3243FM | AAC | RES, 324K OHMS 1% 1/16W 0402 AAC CR05-3243FM |
| 0402YC103KAT | AVX | CAP, X7R 10nF 16V 10% 0402 AVX 0402YC103KAT |
| 0402YC103KAT | AVX | 2 1 C2 CAP, X7R 10nF 16V 10% 0402 AVX 0402YC103KAT |
| CR05-513JM | AAC | RES, 51K OHMS 5% 1/16W 0402 AAC CR05-513JM |
| LTC2050IS5 | Linear Technology | The five-pin LTC2050IS5 is used for minimum components and minimum pins |
| LTC3441EDE | Linear Technology | LTC3441EDE, SYNCHRONOUS 1MHz LUXEON III WHITE LED DRIVER |
| 2501-2 | Mill-Max | TURRETS MILL-MAX-2501-2 |
| PMEG2010EA | Philips | DIODE, SCHOTTKY BARRIER PHILIPS PMEG2010EA |
| RL1220TR033F | Thin-Film | RES, 0.033 OHMS 1% 1/16W 0805 THIN-FILM RL1220TR033F |
| LTC2050IS6 | Linear Technology | Replace LTC2050IS5 with LTC2050IS6 for low quiescent current during LED OFF. |