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GM9910B
UNIVERAL HIGH BRIGHTNESS
LED DRIVER
Description
The GM9910B is a PWM high efficiency control LED driver IC. It allows efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 10VDC up to 500VDC, this feature allows GM9910B can work from a wide range of
input voltages without the need for an external low voltage supply.By using a single resistor, the switching frequency to control the external MOSFET canbe fixed up to 300KHz. GM9910B is constant current LED driver, which enhance the reliability.The output current can be programmed between a few milliamps and up to more than 1.0A. GM9910B uses a rugged high voltage junctionisolated process that can withstand an input voltage surge of up to 500V. Output current to an LED string can be programmed to any value between zero and its maximum value by applying an external control voltage at the lineardimming control input of the GM9910B. The GM9910B provides a low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz.
Features
> 90% efficiency
Wide input range – 10V to 500V
Constant current LED driver
Applications from a few mA to more than 1A
LED string from one to hundreds of diodes
PWM low frequency dimming via enable pin
Input voltage surge rating up to 500V
Applications
AC/DC or DC/DC LED Driver Applications
RGB Backlighting LED Driver
Back Lighting of Flat Panel Displays
General Purpose Constant Current Source
Absolute Maximum Ratings
PARAMETER RATINGS
VIN to GND -------------------------------- -0.5V to + 500V
CS ------------------------------------------- -0.3V to VDD + 0.3V
LD, PWMD to GND ------------------------------ -0.3V to VDD - 0.3V
GATE to GND -------------------------------- -0.3V to VDD + 0.3V
Operating Temperature Range ------------ - 40°C to + 85°C
Junction Temperature ------------------------------- +125°C
Continuous Power Dissipation (TA = 25°C)
DIP 8 ------------------------------------------------ 900mW
SO 8 --------------------------------------------------- 630mW
SO 16 ------------------------------------------------ 1300mW
Storage Temperature -------------------------------- - 65°C to + 150°C
Stresses beyond those listed under ‘‘Absolute Maximum Ratings’’ may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
