TPS61140 - TPS61140/1 数据表

TPS61140是TI德州仪器公司的一款背光产品，TPS61140是TPS61140/1 数据表，本站介绍了TPS61140的封装应用图解、特点和优点、功能等，并给出了与TPS61140相关的TI元器件型号供参考。

TPS61140 - TPS61140/1 数据表 - 背光 - LED驱动器 - 德州仪器

产品描述

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.

产品特性

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

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