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Wide Input Voltage, High-Efficiency LED Driver with Integrated Boost Converter
A8502
The A8502 simplifies LCD backlighting and LED lighting designs, integrating a boost converter, two current sinks, and comprehensive protection features. Its wide input voltage range (5V-40V) ensures robust performance in automotive applications.
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Wide input voltage range of 5 to 40 V for start/stop, cold crank and load dump requirements
Fully integrated LED current sinks and boost converter with 60 V DMOS
Sync function to synchronize boost converter switching frequency up to 2.3 MHz, allowing operation above the AM band
Excellent input voltage transient response
Single resistor primary OVP minimizes VOUT leakage
Internal secondary OVP for redundant protection
LED current of 120 mA per channel
Drives up to 12 series LEDs in 2 parallel strings
0.7% to 0.8% LED to LED matching accuracy
PWM and analog dimming inputs
5000:1 PWM dimming at 200 Hz
Provides driver for optional external PMOS input disconnect switch
Extensive protection against:
Shorted boost switch or inductor
Shorted FSET or ISET resistor
Shorted output
Open or shorted LED pin
Open boost Schottky
Overtemperature (OTP)
The A8502 is provided in a 16-pin TSSOP package (suffix LP) with an exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin lead frame plating.