High Brightness LED Driver
Description
HY7700 is a PWM high-efficiency LED driver controller IC. It allows efficient operation of High Brightness (...
Description
Description
HY7700 is a PWM high-efficiency LED driver controller IC. It allows efficient operation of High Brightness (HB) LED(s) from voltage sources ranging from 9VDC up to 450VDC. HY7700 controls an external MOSFET at variable switching frequency up to 300 kHz. The constant off-time can be programmed using a single resistor. The LED string is driven at constant current rather than constant voltage, thus providing constant light output and enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A
.
Typical Applications Circuit
HY7700
High Brightness LED Driver
Features
n >90% efficiency. n 9V to 450V input Range. n Constant Current LED driver. n More than 1.0A output applications. n PWM Low-Frequency Dimming via
Enable pin. n Input Voltage Surge ratings up to 450V.
Applications
n DC/DC LED Driver Application. n RGB backlighting LED driver. n Back lighting of flat panel displays. n LED Lighting Application n Automotive LED Lighting Application.
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HY7700 V1.0
HY7700
High Brightness LED Driver
Marking Information & Pin Configuration
RT LD VDD EN
87
65
HY7700 AYYWW
A : Assembly Location YY : Year WW : Weekly
12
34
VIN CS GND DRV
Pin Definition
PIN NUMBER
1 2 3 4 5 6 7
8
PIN SYMBOL
VIN CS GND DRV EN VDD LD
RT
PIN DESCRIPTION
Power Supply Output current set input. Connect a resistor from CS to GND to set the LED bias current. ILED = 0.25 / RSE Ground Ou...
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