CCFL Controller targets LCD TV and notebook displays.
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Press Release Summary:
Supporting input voltages from 8-30 V, full-bridge, phase-shift Model TPS68000 can drive 4 external NMOS switches without external circuitry. It provides synchronizable constant frequency operation, lamp voltage and current regulation, analog and burst dimming, and programmable voltage regulation timeout for start-up and fault conditions. Input voltage range is suitable for designing inverter modules powered directly from regulated 12 or 24 V rails.
Original Press Release:
TI Introduces Integrated Full-Bridge Phase-Shift CCFL Controller for LCD TV and Notebook Displays
Controller Features Direct PWM Dimming; Supports Input of 8 V to 30 V
DALLAS (March 3, 2006) - Texas Instruments Incorporated (TI) (NYSE: TXN) announced today an integrated, full-bridge phase-shift power controller for CCFL backlight power supplies in LCD TV monitors and notebook computers. The flexible controller supports input voltages from 8 V to 30 V and can drive four external NMOS switches without external circuitry. See: www.ti.com/sc06058.
TI's TPS68000 controller's wide-input voltage range is suitable for designing inverter modules powered directly from regulated 12-V or 24-V rails, or any other source with output voltages in this range. For example, the device simplifies design of CCFL converters with higher input voltages, such as 120 V or 400 V available at the output of a power factor correction unit. The TPS68000 can support CCFL converters driving multi-lamp applications, either by using higher power-rated switches and transformers, or using several synchronized TPS68000 devices. The device can also power any EEFL-based display backlight.
Key Features of the TPS68000
8 V to 30 V Input Voltage Range
Full Bridge Topology with Integrated Gate Drives for Four NMOS Switches
Synchronizable Constant Frequency Operation
Programmable Phase Delays of Operating Frequency for Master-Slave Operation
Lamp Voltage and Lamp Current Regulation
Analog and Burst Dimming
Configurable Distributed Burst Dimming in Multiple Controller Applications
Programmable Voltage Regulation Timeout for Start-up and Fault Conditions
Open-Lamp and Short-Circuit Protection
Internal Over-Temperature Protection
Undervoltage Lockout
Pricing and Availability
The TPS68000 is available in volume production from TI and its authorized distributors. The device comes in a 30-pin TSSOP package, and is priced at $2.50 each in quantities of 1,000 units. Evaluation modules of the TPS68000, application notes and TI's online power management product selection tool are available through power.ti.com.
About Texas Instruments
Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers' real world signal processing requirements. In addition to Semiconductor, the company's businesses include Sensors & Controls, and Educational & Productivity Solutions. TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries.
Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at: www.ti.com
