BiCMOS Cold Cathode Fluorescent Lamp Driver Controller

Design goals for a Cold Cathode Fluorescent Lamp (CCFL) converter used in a notebook computer or portable application include small size, high efficiency, and low cost. The UCC3972 3 CCFL Controllers provide the necessary circuit blocks to implement a highly efficient CCFL backlight power supply in a small footprint 8 pin TSSOP package. The BiCMOS controllers typically consume less than 1mA of operating current, improving overall system efficiency when compared to bipolar controllers requiring 5mA to 10mA of operating current.
External parts count is minimized and system cost is reduced by integrating such features as a feedback controlled PWM driver stage, open lamp protection, startup delay and synchronization circuitry between the buck and push-pull stages. The UCC3972 3 include an internal Shunt Regulator allowing the part to operate with input voltages from 4.5V up to 25V. The part supports both Analog and externally generated low frequency dimming modes of operation.
The UCC3973 adds a programmable voltage clamp at the BUCK pin. This feature CAN be used to protect the transformer from overvoltage during startup or when an open lamp occurs. Transformer voltage is controlled by reducing duty cycle when an over-voltage is detected.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UCC3973PW Texas Instruments BiCMOS Cold Cathode Fluorescent Lamp Driver Controller 8-TSSOP 0 to 70
UCC3973PWTRG4 Texas Instruments BiCMOS Cold Cathode Fluorescent Lamp Driver Controller 8-TSSOP 0 to 70
UCC3973N Texas Instruments FLUORESCENT LIGHT CONTROLLER, 160kHz SWITCHING FREQ-MAX, PDIP8, GREEN, PLASTIC, DIP-8
UCC3973NG4 Texas Instruments FLUORESCENT LIGHT CONTROLLER, 160kHz SWITCHING FREQ-MAX, PDIP8, GREEN, PLASTIC, DIP-8
UCC3973PWTR Texas Instruments BiCMOS Cold Cathode Fluorescent Lamp Driver Controller 8-TSSOP 0 to 70
UCC3973PWG4 Texas Instruments BiCMOS Cold Cathode Fluorescent Lamp Driver Controller 8-TSSOP 0 to 70
UCC3973REF Texas Instruments Cold Cathode Fluorescent Lamp Driver
UCC3973 's PackagesUCC3973 's pdf datasheet
UCC3973N PDIP
UCC3973NG4 PDIP
UCC3973PW TSSOP
UCC3973PWG4 TSSOP
UCC3973PWTR TSSOP
UCC3973PWTRG4 TSSOP




UCC3973 Pinout, Pinouts
UCC3973 pinout,Pin out
This is one package pinout of UCC3973,If you need more pinouts please download UCC3973's pdf datasheet.

UCC3973 Application circuits
UCC3973 circuits
This is one application circuit of UCC3973,If you need more circuits,please download UCC3973's pdf datasheet.


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