LM2796开发板套件编程器的评估板-LED驱动器规格书PDF中文资料

LM2796属于开发板套件编程器的评估板-LED驱动器。由德州仪器制造生产的LM2796评估板 - LED 驱动器LED 驱动器评估板是带有元器件的电路板，用于提供特定电路或器件的工作实例。该系列评估板提供一个 LED 驱动器实例，用于可调节闪烁、模拟亮度、背光、双极开关、升压转换器、亮度控制、相机闪光灯、可调光、恒流和 RGB 控制，以及更多其他应用。

1FEATURES

2• 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)

pulseAPPLICATIONS

• Mobile Phone Display Lighting

• Mobile Phone Keypad Lighting

• PDAs

• General LED Lighting

DESCRIPTION

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 pulseAPPLICATIONS

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.