LM3697 - 具有 11 位指数调光的 3 灯串背光驱动器

LM3697是TI德州仪器公司的一款背光产品，LM3697是具有 11 位指数调光的 3 灯串背光驱动器，本站介绍了LM3697的封装应用图解、特点和优点、功能等，并给出了与LM3697相关的TI元器件型号供参考。

LM3697 - 具有 11 位指数调光的 3 灯串背光驱动器 - 背光 - LED驱动器 - 德州仪器

产品特性

Drives Three Parallel High-Voltage LED Strings for Display and Keypad Lighting
High-Voltage Strings Capable of up to 40-V Output Voltage and up to 90% Efficiency
Up to 30 mA per Current Sink
11-Bit Configurable Dimming Resolution
PWM Input for Content Adjustable Brightness Control (CABC)
Fully Configurable LED Grouping and Control
Integrated 1-A/40-V MOSFET
Adaptive Boost Output to LED Voltages
Selectable 500-kHz and 1-MHz Switching Frequency
Four Configurable Overvoltage Protection Thresholds (16 V, 24 V, 32 V, and 40 V)
Overcurrent Protection
Thermal Shutdown Protection
29-mm2 Total Solution Size

产品应用

Power Source for Smart Phone Illumination
Display, Keypad and Indicator Illumination

产品说明

The LM3697 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2 and HVLED3).

An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3697 is fully configurable via an I2C-compatible interface. The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.

产品器件信息

ORDER NUMBER	PACKAGE	BODY SIZE (MAX)
LM3697YFQ	DSBGA (12)	1.64 mm x 1.29 mm

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