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KTD3134 High Efficiency 2-Channel LED Backlight with Flash Function

High Efficiency 2-Channel LED Backlight with Flash Function

Description

Wide input range: 2.7V~5.5V
High efficiency step-up 2-Channel LED driver
2-Ch current sinks, up to 8-LEDs per string
- Up to 29.8mA/Ch in backlight mode and up to 59.6mA/Ch in flash
- +/-0.6% current matching at 20.2mA
- +/-1.5% current accuracy at 20.2mA
I²C/PWM dual dimming control scheme
- 11-bit I²C exponential or linear mapping with programmable transition ramp time
- Wide range PWM dimming with programable transition ramp time
- 100Hz to 100kHz frequency
- 0.2% to 100% duty cycle at 20kHz
Programmable current sink turn on/off ramp time and shape
Selectable boost converter switching frequency 1MHz or 500kHz with 20% shift up option
Programmable input PWM hysteresis to minimize jitter at low PWM duty cycle
Programmable OVP (25.9V/32V) and current limit (1.8A/2.6A)
LED open/short protection
Status reporting through I²C interface
12-ball 1.19mm x 1.64mm WLCSP or a 16-lead 3mm x 3mm x 0.75mm Thin-QFN package.

Applications

Smartphone/Tablet Backlight

Vin (Min)	Vin (Max)	Number of LEDs/Channels	LED Channels	Total Number of LEDs	Brightness Control	Switching Frequency (MHz)	Current per Channel (Max)	Output OVP	Package
2.7V	5.5V	8	2	16	I²C and/or PWM	1.0/0.5	29.8mA	25.9V/32V	WLCSP-12TQFN33-16