LM3630A - LM3630A 高效双串白色 LED 驱动器

LM3630A是TI德州仪器公司的一款背光产品，LM3630A是LM3630A 高效双串白色 LED 驱动器，本站介绍了LM3630A的封装应用图解、特点和优点、功能等，并给出了与LM3630A相关的TI元器件型号供参考。

LM3630A - LM3630A 高效双串白色 LED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品特性

Drives up to 2 Strings of 10 Series LEDs
Wide 2.3-V to 5.5-V Input Voltage Range
Up to 87% Efficient
8-bit I2C-Compatible Programmable Exponential or Linear Brightness Control
PWM Brightness Control for CABC Operation
Independent Current Control per String
True Shutdown Isolation for LEDs
Internal Soft-Start Limits Inrush Current
Adaptive Headroom
Programmable 16-V/24-V/32-V/40-V Overvoltage Protection
Selectable Boost Frequency of 500 kHz or 1 MHz with Optionally Additional Offset
Low Profile 12-Pin DSBGA Package
Solution Size 32 mm²

产品应用

Smart-Phone LCD Backlighting
LCD and Keypad Lighting

产品说明

The LM3630A is a current-mode boost converter which supplies the power and controls the current in up to two strings of 10 LEDs per string. Programming is done over an I2C-compatible interface. The maximum LED current is adjustable from 5 mA to 28.5 mA. At any given maximum LED current the LED brightness is further adjusted with 256 exponential or linear dimming steps. Additionally, pulsed width modulation (PWM) brightness control can be enabled allowing for LED current adjustment by a logic level PWM signal.

The boost switching frequency is programmable at 500 kHz for low switching loss performance or 1 MHz to allow the use of tiny low-profile inductors. A setting for a 10% offset of these frequencies is available. Overvoltage protection is programmable at 16 V, 24 V, 32 V, or 40 V to accommodate a wide variety of LED configurations and Schottky diode/output capacitor combinations.

The device operates over a 2.3-V to 5.5-V operating voltage range and –40°C to +85°C ambient temperature range. The LM3630A is available in an ultra-small 12-bump DSBGA package.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (MAX)
LM3630A	DSBGA (12)	1.94 mm × 1.42 mm

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