UCC2808AQDR-2EP by Texas Instruments | Current Mode PWM Controller | Avnet ASIA

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UCC2808AQDR-2EP

Texas Instruments

Current Mode PWM Controller 1A 8-Pin SOIC T/R

Manufacturer Part #: UCC2808AQDR-2EP

Alternate Part #: UCC2808AQDR-2EP


legend RoHS Compliant

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Information

The UCC2808A is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC2808A contains all of the control and drive circuitry required for off-line or dc-to-dc fixed frequency current-mode switching power supplies with minimal external parts count.

The UCC2808A dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle to less than 50%.

The UCC2808A family offers a variety of package options and choice of undervoltage lockout levels. The family has UVLO thresholds and hysteresis options for off-line and battery powered systems. Thresholds are shown in the ordering information table.

The UCC2808A is an enhanced version of the UCC2808 family. The significant difference is that the A versions feature an internal discharge transistor from the CS pin to ground, which is activated each clock cycle during the oscillator dead time. The feature discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.

Key Features

  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Extended Temperature Performance of –40°C to 125°C
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product-Change Notification
  • Qualification Pedigree
  • Dual Output Drive Stages in Push-Pull Configuration
  • Current Sense Discharge Transistor to Improve Dynamic Response
  • 130-µA Typical Starting Current
  • 1-mA Typical Run Current
  • Operation to 1 MHz
  • Internal Soft Start
  • On-Chip Error Amplifier With 2-MHz Gain Bandwidth Product
  • On Chip VDD Clamping
  • Output Drive Stages Capable of 500-mA Peak-Source Current,
    1-A Peak-Sink Current
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Number of PWM Outputs
    2
    Maximum Duty Cycle
    50 %
    Pin Count
    8
    Mounting
    Surface Mount
    Fall Time
    25 ns
    On/Off Pin
    No
    Rise Time
    25 ns
    Output Current
    1000 mA
    Operating Temperature
    -40 to 125 °C
    MSL Level
    1
    Switching Frequency
    1000 kHz
    Product Dimensions
    5 x 4 x 1.5 mm
    Lead Finish
    Gold
    Max Processing Temp
    260
    Supplier Package
    SOIC
    Adjustable Output
    No

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542.2121-00
    HTSN:
    8542.2121-00
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101
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