KTD3133 High Efficiency 2-Channel LED Backlight Driver Datasheet Brief
●Brief Description
■KTD3133 is the ideal power solution for LED backlighting in medium to large size LCD panels. It is a highly integrated step-up DC-DC converter operating with an input voltage from 2.7V to 5.5V, accommodating 1-cell lithium ion batteries or 5V supply. It includes a high voltage power NMOS, as well as two current sinks, resulting in a simpler and smaller solution with fewer external components. High switching frequency allows the use of a smaller inductor and capacitor.
■Each of the two regulated current sinks can regulate up to 29.8mA in backlight mode. With a maximum of 32V at the output of the step-up converter, each string can connect up to 8-LED in series for a 16-LED application.
■KTD3133 is equipped with I²C interface for various controls. For additional flexibility, PWM dimming with wide range frequency and duty cycle is included to support Content Adaptive Brightness Control (CABC).
■Various protection features are built into KTD3133, including cycle-by-cycle inductor current limit protection, output over-voltage protection, LED fault (open or short) protection and thermal shutdown protection.
■KTD3133 is available in a RoHS compliant 12-ball 1.19mm x 1.64mm WLCSP or a 16-lead 3mm x 3mm x 0.75mm Thin-QFN package.
●Features
■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
▲+/-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
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High Efficiency 2-Channel LED Backlight Driver 、 highly integrated step-up DC-DC converter |
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Datasheet |
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Please see the document for details |
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WLCSP;Thin-QFN;WLCSP-12;TQFN33-16 |
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English Chinese Chinese and English Japanese |
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January 2018 |
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Revision 04a |
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226 KB |
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