UCC2808AD-1 by Texas Instruments | APACCurrent Mode PWM Controller | Avnet ASIA
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信息

UCC2808AD-1

Texas Instruments

Current Mode PWM Controller 1A 8-Pin SOIC Tube

制造商料号#: UCC2808AD-1

替代型号#: UCC2808AD-1


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描述

文档

替代/替换

信息

The UCC3808A is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC3808A 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 UCC3808A 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 UCC3808A family offers a variety of package options, temperature range 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 table below.

The UCC3808A is an enhanced version of the UCC3808 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.

技术参数

  • 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
  • 技术特性

    描述
    寻找类似物料
    Rise Time
    25 ns
    Mounting
    Surface Mount
    On/Off Pin
    No
    Operating Temperature
    -40 to 85 °C
    MSL Level
    1
    Fall Time
    25 ns
    Lead Finish
    Gold
    Output Current
    1000 mA
    Max Processing Temp
    260
    Number of PWM Outputs
    2
    Product Dimensions
    5 x 4 x 1.5 mm
    Adjustable Output
    No
    Switching Frequency
    1000 kHz
    Pin Count
    8
    Supplier Package
    SOIC
    Maximum Duty Cycle
    50 %

    ECCN / UNSPSC

    描述
    ECCN:
    EAR99
    计划交货期 B:
    8542390000"
    HTSN:
    8542310000"
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101
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