LM36922H
- 1% Matched Current Sinks Across Process, Voltage, Temperature
- 3% Current-Sink Accuracy Across Process, Voltage, Temperature
- 11-Bit Dimming Resolution
- Up to 90% Solution Efficiency
- Drives from One to Two Parallel LED Strings at up to 38 V at 25 mA per String
- PWM Dimming Input
- I2C Programmable
- Selectable 500-kHz and 1-MHz Switching Frequency With Optional –12% shift
- Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
- Four Configurable Overvoltage Protection Thresholds (17 V, 24 V, 31 V, 38 V)
- Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250
mA,
1500 mA) - Thermal Shutdown Protection
- Externally Selectable I2C Address Options via ASEL Input
The LM36922H is an ultra-compact, highly efficient, two-string white-LED driver designed for LCD display backlighting. The device can power up to 12 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies with noise-free operation from 50 µA to 25 mA.
Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.
The device operates over the 2.5-V to 5.5-V input voltage range and a –40°C to +85°C temperature range.
For all available packages, see the orderable addendum at the end of the data sheet.기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM36922H Highly Efficient Dual-String White LED Driver datasheet (Rev. A) | PDF | HTML | 2016. 2. 16 | |
| 백서 | Common LED Functions and LED Driver Design Considerations | 2020. 9. 21 | |||
| 애플리케이션 노트 | Analog PWM Dimming in White-LED Drivers | 2016. 12. 21 |
설계 및 개발
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LM36922EVM — LM36922 고효율 듀얼 스트링 백색 LED 드라이버 평가 모듈
The LM36922 Evaluation Module (LM36922EVM) is designed to fully evaluate the LM36922 Highly Efficient Dual-String White LED backlight driver. The LM36922EVM consists of the LM36922 with 2p8s white LED strings with jumpers to enable 1p2s through 2p8s led string configurations. LED string (...)
SNVC193 — LM36923HEVM/LM36922HEVM GUI Software
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| DSBGA (YFF) | 12 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.