LM3631 Series

Integrated WLED backlight driver and Bias power for LCD panels

Catalog

Integrated WLED backlight driver and Bias power for LCD panels

Part	Features	Utilized IC / Part	Current - Output / Channel [custom]	Outputs and Type	Outputs and Type	Voltage - Input [Max]	Voltage - Input [Min]	Supplied Contents	Dimming	Package / Case	Mounting Type	Internal Switch(s)	Applications	Number of Outputs	Frequency [Min]	Frequency [Max]	Voltage - Output	Supplier Device Package [y]	Supplier Device Package	Supplier Device Package [x]	Voltage - Supply (Max) [Max]	Topology	Type	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments LM3631EVM	Dimmable	LM3631	25 mA	2	Non-Isolated	5 V	2.7 V	Board(s)
Texas Instruments LM3631YFFR			25 mA						PWM	24-UFBGA DSBGA	Surface Mount		Backlight	2	500 kHz	1 MHz	29 V	1.89	24-DSBGA	2.59	5 V	Step-Up (Boost) Switched Capacitor (Charge Pump)	DC DC Regulator	85 °C	-40 °C

Catalog

Integrated WLED backlight driver and Bias power for LCD panels

Key Features

• Drives up to Two Strings with Maximum of Eight LEDs in SeriesIntegrated Backlight Boost with 29-V Maximum Output VoltageTwo Low-Side Constant-Current LED Drivers with 25-mAMaximum Output CurrentBacklight Efficiency Up to 90%11-Bit Linear or Exponential Dimming with up to 17-Bit OutputResolutionExternal PWM Input for CABC Backlight OperationLCD Bias Efficiency > 85%Programmable Positive LCD bias, 4-V to 6-V, 100-mA MaximumOutput CurrentProgrammable Negative LCD bias, –4-V to –6-V,80-mA Maximum Output CurrentTwo Positive Programmable LDO Reference Outputs4-V to 6-V, 50-mA Maximum Output Current1.8-V to 3.3-V, 80-mA Maximum Output Current2.7-V to 5-V Input Voltage RangeDrives up to Two Strings with Maximum of Eight LEDs in SeriesIntegrated Backlight Boost with 29-V Maximum Output VoltageTwo Low-Side Constant-Current LED Drivers with 25-mAMaximum Output CurrentBacklight Efficiency Up to 90%11-Bit Linear or Exponential Dimming with up to 17-Bit OutputResolutionExternal PWM Input for CABC Backlight OperationLCD Bias Efficiency > 85%Programmable Positive LCD bias, 4-V to 6-V, 100-mA MaximumOutput CurrentProgrammable Negative LCD bias, –4-V to –6-V,80-mA Maximum Output CurrentTwo Positive Programmable LDO Reference Outputs4-V to 6-V, 50-mA Maximum Output Current1.8-V to 3.3-V, 80-mA Maximum Output Current2.7-V to 5-V Input Voltage Range

Description

The LM3631 is a complete LCD backlight and bias power solution for mobile devices. This one-chip solution has an integrated high-efficiency backlight LED driver and positive/negative bias supplies for LCD drivers addressing the power requirements of high-definition LCDs. Integrated solution allows small solution size while still maintaining high performance. Capable of driving up to 16 LEDs, the LM3631 is ideal for small- to medium-size displays. Two additional programmable LDO regulator outputs can be used to power display controller, LCD gamma reference, or any additional peripherals. A high level of integration and programmability allows the LM3631 to address a variety of applications without the need for hardware changes. Voltage levels, backlight configuration, and power sequences are all configurable through I2C interface. The LM3631 is a complete LCD backlight and bias power solution for mobile devices. This one-chip solution has an integrated high-efficiency backlight LED driver and positive/negative bias supplies for LCD drivers addressing the power requirements of high-definition LCDs. Integrated solution allows small solution size while still maintaining high performance. Capable of driving up to 16 LEDs, the LM3631 is ideal for small- to medium-size displays. Two additional programmable LDO regulator outputs can be used to power display controller, LCD gamma reference, or any additional peripherals. A high level of integration and programmability allows the LM3631 to address a variety of applications without the need for hardware changes. Voltage levels, backlight configuration, and power sequences are all configurable through I2C interface.