Datasheet Brief KTD3137 For full datasheet, click HERE. High Efficiency 3-Channel LED Backlight with Panel Flash Function Features Brief Description Wide input range: 2.7V~5.5V KTD3137 is the ideal power solution for LED backlighting and selfie flash in medium to large size LCD panels. It is a High efficiency step-up 3-Channel LED driver highly integrated step-up DC-DC converter operating with 3-Ch current sinks, up to 8-LEDs per string an input voltage from 2.7V to 5.5V, accommodating 1-cell Up to 29.8mA/Ch in backlight mode and up lithium ion batteries or 5V supply. It includes a high voltage to 59.6mA/Ch in flash mode power NMOS, as well as three current sinks, resulting in a +/-0.6% current matching at 20.2mA simpler and smaller solution with fewer external +/-1.5% current accuracy at 20.2mA components. High switching frequency allows the use of a 2 I C/PWM dual dimming control scheme smaller inductor and capacitor. 2 11-bit I C exponential or linear mapping with programmable transition ramp time Each of the three regulated current sinks can regulate up Wide range PWM dimming with programable to 29.8mA in backlight mode. With a maximum of 32V at transition ramp time the output of the step-up converter, each string can 100Hz to 100kHz frequency connect up to 8-LED in series for a 24-LED application. 0.2% to 100% duty cycle at 20kHz 2 KTD3137 is equipped with I C interface for various Programmable current sink turn on/off ramp controls. For additional flexibility, PWM dimming with wide time and shape range frequency and duty cycle is included to support Selectable boost converter switching frequency Content Adaptive Brightness Control (CABC). 1MHz or 500kHz with 20% shift up option KTD3137 also adds selfie flash function to the existing Programmable input PWM hysteresis to backlight solution by boosting the sink current up to minimize jitter at low PWM duty cycle 59.6mA/Ch and integrating a flash timeout of up to 1.5sec. Programmable OVP (25.9V/32V) and current limit (2.6A/1.8A) Various protection features are built into KTD3137, Programmable flash current and timeout including cycle-by-cycle inductor current limit protection, LED open/short protection output overvoltage protection, LED fault (open or short) 2 Status reporting through I C interface protection and thermal shutdown protection. KTD3137 is available in a RoHS compliant 12-ball 1.19mm Applications x 1.64mm WLCSP or a 16-lead 3mm x 3mm x 0.75mm Thin-QFN package. Smartphone/Tablet Backlight and Selfie Flash Typical Application White LEDs L D V OUT Up to 8 in series V IN 2.7V to 5.5V 10H C IN C OUT 10F 1F LX VOUT VIN KTD3137 S1 HWEN S2 SCL MCU S3 SDA PWM AGND PGND April 2019 - Revision 04a Page 1 Company Confidential Datasheet Brief KTD3137 Ordering Information 1 Part Number Marking Operating Temperature Package KTD3137EUS-TR LLXXYYZZZZ -40C to +85C WLCSP-12 KTD3137EFJ-TR LLYYZ -40C to +85C TQFN33-16 1. XXYYZZZZ / YYZ are the date code, assembly code and serial number / the date code and assembly code. Kinetic Technologies cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Kinetic Technologies product. No intellectual property or circuit patent licenses are implied. Kinetic Technologies reserves the right to change the circuitry and specifications without notice at any time. April 2019 - Revision 04a Page 2 Company Confidential