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UCC3819A

Features: ` Controls Boost Preregulator to Near-Unity Power Factor` World Wide Line Operation` Over-Voltage Protection` Accurate Power Limiting` Average Current Mode Control` Improved Noise Immunity` Improved Feed-Forward Line Regulation` Leading Edge Modulation` 150-A Typical Start-Up Current` Lo...

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SeekIC No. : 004536014 Detail

UCC3819A: Features: ` Controls Boost Preregulator to Near-Unity Power Factor` World Wide Line Operation` Over-Voltage Protection` Accurate Power Limiting` Average Current Mode Control` Improved Noise Immunity...

UCC3819A Data Sheet

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Part Number:
UCC3819A
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Controls Boost Preregulator to Near-Unity Power Factor
` World Wide Line Operation
` Over-Voltage Protection
` Accurate Power Limiting
` Average Current Mode Control
` Improved Noise Immunity
` Improved Feed-Forward Line Regulation
` Leading Edge Modulation
` 150-A Typical Start-Up Current
` Low-Power BiCMOS Operation
` 10.8-V to 17-V Operation
` Programmable Output Voltage (Tracking Boost Topology)


Pinout

Connection Diagram


Specifications

  UCCx81xA UNIT
Supply voltage VCC 18 V
Gate drive current, continuous 0.2 A
Gate drive current 1.2
Input voltage, CAI, MOUT, SS 8 V
Input voltage, PKLMT 5
Input voltage, VSENSE, OVP/EN 10
Input current, RT, IAC, PKLMT 10 mA
Maximum negative voltage, DRVOUT, PKLMT, MOUT −0.5 V
Power dissipation 1 W
Junction temperature, TJ −55 to 150 °C
Storage temperature, Tstg −65 to 150
Lead temperature, Tsol (soldering, 10 seconds) 300

† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.




Description

The UCC2819A/UCC3819A provides all the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac-input line current waveform to correspond to that of the ac-input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current.

Designed in Texas Instrument's BiCMOS process, the UCC3819A offers new features such as lower start-up current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry and a leading-edge modulation technique to reduce ripple current in the bulk capacitor.

The UCC3819A allows the output voltage to be programmed by bringing out the error amplifier noninverting input.




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