The ALT80600/1 delivers ultra-high dimming ratios (up to 15,000:1 at 200Hz) with minimal output ripple, using patented Pre-Emptive Boost (PEB) control. These multi-output LED drivers offer integrated current sinks, flexible boost/SEPIC operation, and extensive protection features. The ALT80600-1 is optimized for lower switching frequencies.
Product Details
Product Details
Top Features
- Automotive AEC-Q100 qualified
- Wide input voltage range of 4.5 to 40 V for start/stop, cold crank, and load dump requirements
- Fully integrated LED current sinks and boost converter with internal power MOSFET
- Operate in Boost or SEPIC mode for flexible output
- Drives up to 11 series white LED in 4 parallel strings, at up to 120 mA per string (VF = 3.3 V max).
- Programmable boost switching frequency or sync externally from 200 kHz to 2.3 MHz
- Clock-Out feature for internal switching frequency
- Adjustable boost frequency dithering to reduce EMI
- Advanced control allows minimum PWM on-time down to 0.3 μs, and avoids MLCC audible noises
- LED contrast ratio: 15,000:1 at 200 Hz using PWM dimming alone, 150,000:1 when combining PWM and analog dimming
- Excellent input voltage transient response even at lowest PWM duty cycle
- Gate driver for optional PMOS input disconnect switch
- Extensive protection against:
- Shorted boost switch, inductor or output capacitor
- Shorted FSET or ISET resistor
- Open or shorted LED pins and LED strings
- Open boost Schottky diode
- Overtemperature
Target Application
