LM2796 - 具有 3/2x 开关电容器升压的双显示白光 LED 驱动器

LM2796是TI德州仪器公司的一款背光产品，LM2796是具有 3/2x 开关电容器升压的双显示白光 LED 驱动器，本站介绍了LM2796的封装应用图解、特点和优点、功能等，并给出了与LM2796相关的TI元器件型号供参考。

LM2796 - 具有 3/2x 开关电容器升压的双显示白光 LED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品描述

The LM2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting. It can drive up to 7 LEDs in parallel with up to 20mA through each LED. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED-driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display. The second group (3 LEDs) can be used to backlight a secondary display or to provide other lighting features (keypad LEDs, for example). Brightness of the two groups can be adjusted independently with pulse-width modulated (PWM) digital signals.

The LM2796 works off an extended Li-Ion input voltage range (2.7V to 5.5V). Voltage boost is achieved with a high-efficiency 3/2×-gain charge pump.

The LM2796 is available in TI’s chip-scale 18-bump DSBGA package.

产品特性

Drives up to 7 LEDs with up to 20mA Each
LEDs Controlled in 2 Distinct Groups, for Backlighting 2 Displays (Main LCD and Sub-LCD)
Excellent Current and Brightness Matching
High-Efficiency 3/2x Charge Pump
Extended Li-Ion Input: 2.7V to 5.5V
PWM Brightness Control: 100Hz - 1kHz
18-bump Thin DSBGA Package: (2.1mm x 2.4mm x 0.6mm)

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