TPS61141
- 2.5-V to 6-V Input Voltage Range
- Two Outputs Each up to 27 V
- 0.7-A Integrated Switch
- Built-In Power Diode
- 1.2-MHz PWM for WLED Driver
- PFM for OLED Supply
- Individually Programmable Output
- Input to Output Isolation
- Short-Circuit Protection
- Built-In Soft Start
- Overvoltage Protection
- Up to 82% Efficiency
- Up to 30 kHz PWM Dimming Frequency
- Available in a 10 Pin, 3 × 3 mm QFN Package
- APPLICATIONS
- Clamshell Phone With OLED/LCD Screen
The TPS61140/1 is a dual output boost converter IC. It is intended to be configured as a highly integrated power solution providing regulated voltage and current output with one boost converter. This device is ideal for driving the OLED sub display and WLED backlight for the LCD main display in clam shell phones. The voltage and current can be individually programmed through external resistors. There is a dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. When only the voltage output is enabled, the boost converter is controlled by pulse frequency modulation (PFM) in order to achieve high efficiency over a wide load range. If the current output is selected, the device adopts a 1.2-MHz pulse width modulation control (PWM) method in order to maximize output current. Applying an external PWM signal to the select pin (SELI) reduces the output current thereby allowing WLED dimming.
The TPS61140/1 has a built-in power MOSFET and power diode; thereby, eliminating the needs for any external active power components. In addition, the high switching frequency reduces the external inductor and capacitor sizes. Overall, the IC provides a highly compact solution with high efficiency and plenty of flexibility.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | Dual Output Boost Regulator Using SIngle Inductor datasheet (Rev. B) | 2007. 3. 22 | ||
| 백서 | Common LED Functions and LED Driver Design Considerations | 2020. 9. 21 | |||
| 애플리케이션 노트 | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018. 12. 11 | |||
| 애플리케이션 노트 | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | 2017. 11. 29 | |||
| 애플리케이션 노트 | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 2017. 6. 15 | |||
| 아날로그 디자인 학술지 | IQ: What it is, what it isn’t, and how to use it | 2011. 6. 17 | |||
| 애플리케이션 노트 | Minimizing Ringing at the Switch Node of a Boost Converter | 2006. 9. 15 |
설계 및 개발
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TPS61140EVM-157 — TPS61140EVM 평가 모듈
The TPS61140EVM-157 is an evaluation tool for the TPS6114x family. This is a dual channel, single Inductor Boost Converter which is ideal for driving the OLED sub-display and white LED backlight for the LCD main display in clam shell phones.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VSON (DRC) | 10 | Ultra Librarian |