LED Drivers
Wide Input Voltage, High-Efficiency LED Drivers with Four Current Sinks and PWM Dimming
A8519
The A8519-1 offers a versatile solution for driving multiple LED strings, with four integrated current sinks, a boost converter, and PWM dimming for precise brightness control. The A8519-1 provides reduced output voltage ripple for enhanced dimming performance.
Product Details
Product Details
Top Features
- Automotive AEC-Q100 qualified
- Fully integrated 42 V MOSFET for boost converter
- Fully integrated LED current sinks
- Withstands surge input up to 40 VIN for load dump
- Operates down to 3.9 VIN (max) for idle stop
- Drives four strings of LEDs
- Maximum output voltage 40 V
- Up to 11 white LEDs in series
- Drive current for each string is 100 mA
- Programmable boost switching frequency (200 kHz to 2.15 MHz)
- Synchronized boost switching frequency option (260 kHz to 2.3 MHz)
- Dithering of boost switching frequency to reduce EMI
- Extremely high LED contrast ratio
- 10,000:1 using PWM dimming alone
- 100,000:1 when combining PWM and analog dimming
- Excellent input voltage transient response at lowest PWM duty cycle
- Gate driver for optional P-channel MOSFET input disconnect switch
- LED current accuracy 0.7%
- LED string current matching accuracy 0.8%
- Protection against:
- Shorted boost switch, inductor or output capacitor
- Shorted FSET or ISET resistor
- Open or shorted LED pins and LED strings
- Open boost diode
- Overtemperature
