White LED Driver (Backlight)

Part No. Topology Input
Voltage		 Frequency Output Voltage Max.
LED No. 		Backlight
Type 		Brightness Control Package
HT7936A Charge Pump 2.8V~5.0V 1.0MHz 5.0V 4 Parallel PWM SOT23-6
HT7936B 4.5V 6
Part No. Topology Input
Voltage		 Frequency Typical OVP Maximum Efficiency Max.
LED No. 		Backlight
Type 		Brightness Control Package
HT7937 boost 2.5V~5.5V 1.2MHz 28V 85% 6 Single Series WLED PWM/Analog DC SOT23-6
HT7938 boost 2.6V~5.5V 1.2MHz 39V 88% 10 Single Series WLED PWM/Analog DC SOT23-6
HT7939 boost 2.6V~5.5V 1.2MHz 32V 90% 40 Series/Parallel Mixed PWM/Analog DC SOT23-6
HT7940* boost 4.5V~26V 600kHz~
1.2MHz		 LED Open/Short Protection 88% 60 Up to 10 Series 6ch Constant Current Sink PWM 20QFN
HT7941* boost 4.5V~26V 600kHz~
1.2MHz		 LED Open/Short Protection 88% 80 Up to 10 Series 8ch Constant Current Sink PWM 24QFN

 * Under development, available in 1Q, 2010.

White LED Driver (Lighting)

Part No. Topology Input
Voltage		 Extended VIN with
External Bias		 LED String
Voltage		 Internal Power
MOSFET		 ILED Jitter
Control		 Package
HT7L4091* AC/DC buck
DC/DC buck		 8V~24V Up to 265V 3V~265V -- 350mA~1A v 8SOP

 * Under development, available in 1Q, 2010.