LM3532
- Drives up to 3 Parallel High-Voltage LED Strings
at 40 V Each With up to 90% Efficiency - 0.4% Typical Current Matching Between Strings
- 256 Level Logarithmic and Linear Brightness
Control With 14-Bit Equivalent Dimming - I2C-Compatible Interface
- Direct Read Back of Ambient Light Sensor Via
8-bit ADC - Programmable Dual Ambient Light Sensor Inputs
With Internal Sensor Gain Selection - Dual External PWM Inputs for LED Brightness
Adjustment - Independent Current String Brightness Control
- Programmable LED Current Ramp Rates
- 40-V Overvoltage Protection
- 1-A Typical Current Limit
The LM3532 is a 500-kHz fixed frequency asynchronous boost converter which provides the power for 3 high-voltage, low-side current sinks. The device is programmable over an I2C-compatible interface and has independent current control for all three channels. The adaptive current regulation method allows for different LED currents in each current sink thus allowing for a wide variety of backlight and keypad applications.
The main features of the LM3532 include dual ambient light sensor inputs each with 32 internal voltage setting resistors, 8-bit logarithmic and linear brightness control, dual external PWM brightness control inputs, and up to 1000:1 dimming ratio with programmable fade in and fade out settings.
The LM3532 is available in a 16-pin, 0.4-mm pitch thin DSBGA package. The device operates over a 2.7-V to 5.5-V input voltage range and the −40°C to +85°C temperature range.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. E) | PDF | HTML | 2015/08/28 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020/09/21 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Application note | Analog PWM Dimming in White-LED Drivers | 2016/12/21 | ||
| Application note | Inductor Selection in Boost Converters for LCD Backlight Applications | 2016/10/24 | ||
| User guide | AN-2249 LM3532 Evaluation Kit (Rev. B) | 2013/04/30 | ||
| User guide | AN-2249 LM3532 Evaluation Kit | 2012/06/21 |
설계 및 개발
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LM3532EVM — LM3532 평가 모듈
LM3532SW-LINUX — LM3532용 Linux 드라이버
Linux Mainline Status
Available in Linux Main line: No
Available through git.ti.com: (...)
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| 패키지 | 핀 | 다운로드 |
|---|---|---|
| DSBGA (YFQ) | 16 | 옵션 보기 |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
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