TPS61187
- Input Voltage 4.5 V to 24 V
- Maximum Output Voltage 38 V
- Integrated 2-A, 40-V MOSFET
- Programmable Switching Frequency 300 kHz to 1 MHz
- Adaptive Boost Output to WLED Voltages
- Wide PWM Dimming Frequency Range
- 100 Hz to 50 KHz for Direct PWM Mode
- 100 Hz to 22 KHz for Frequency Programmable Mode
- 100:1 Dimming Ratio at 20 kHz
- 10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
- Small External Components
- Integrated Loop Compensation
- Six Current Sinks of 30 mA Maximum
- 1.5% (Typical) Current Matching
- PWM Brightness Interface Control
- PWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming Method
- HBM ESD Protection 4 kV
- Programmable Overvoltage Threshold
- Built-in WLED Open/Short Protection
- Thermal Shutdown
The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.
The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.
For all available packages, see the orderable addendum at the end of the data sheet.기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TPS61187 White-LED Driver For Notebooks With PWM Interface and Automatic Phase Shift datasheet (Rev. E) | PDF | HTML | 2016/12/29 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020/09/21 | ||
| Application note | Some Guidelines and Tips for the LED Driver Application | 2019/08/14 | ||
| Application note | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018/12/11 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 |
설계 및 개발
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TPS61187EVM-528 — TPS61187EVM-528 평가 모듈
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| 패키지 | 핀 | 다운로드 |
|---|---|---|
| WQFN (RTJ) | 20 | 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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