ALT80600
Overview
The ALT80600 is a multi-output LED driver for small-size LCD backlighting. It integrates a current-mode boost converter with internal power switch and four current sinks.
- 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 1 to 2.3 MHz for ALT80600, 260 to 700 kHz for ALT80600-1
- 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 Continued on next page... PACKAGE: 24-Pin 4 mm × 4 mm QFN with Wettable Flank Not to scale
