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	Dimming Frequency	Package
HT7937	boost	2.5V~5.5V	1.2MHz	28V	85%	6	Single Series WLED	--	SOT23-6
HT7938	boost	2.6V~5.5V	1.2MHz	39V	88%	10	Single Series WLED	< 1kHz	SOT23-6
HT7938A	boost	2.6V~5.5V	1.2MHz	39V	88%	10	Single Series WLED	Up to 200kHz	SOT23-6
HT7939	boost	2.6V~5.5V	1.2MHz	32V	90%	40	Series/Parallel Mixed	< 1kHz	SOT23-6
HT7939A	boost	2.6V~5.5V	1.2MHz	32V	90%	40	Single Series WLED	Up to 200kHz	SOT23-6

Part No.

Topology

Input Voltage

Switching Frequency

Protection

Maximum Efficiency

Channel Current Matching

Max. LED No.

LED IF

Backlight Type

Brightness Control

LCD Power

Package

HT7943

boost

4.5V~26V

500kHz/1MHz

LED Open/Short OVP, OCP, OTP, UVLO

88%

±1.5%

66

20mA

Up to 11 Series 6ch Constant Current Sink

PWM

--

20QFN

HT7945

boost

4.5V~26V

500kHz/1MHz

LED Open/Short OVP, OCP, OTP, UVLO

88%

±1.5%

88

20mA

Up to 11 Series 8ch Constant Current Sink

PWM

--

24QFN

HT7953

boost

10V~26V

200kHz/400kHz

LED Open/Short OVP, OCP, OTP, UVLO

90%

±2.0%

60

80mA

Up to 10 Series 6ch Constant Current Sink

PWM

--

48TQFP

HT7955

boost

10V~26V

200kHz/400kHz

LED Open/Short OVP, OCP, OTP, UVLO

90%

±2.0%

80

80mA

Up to 10 Series 8ch Constant Current Sink

PWM

48TQFP

HT79T41*

boost

4.5V~26V

500kHz/1MHz

LED Open/Short OVP, OCP, OTP, UVLO

88%

±1.5%

44

20mA

Up to 11 Series 8ch Constant Current Sink

PWM

v

40QFN

* Under development, available in 1Q, 2012.