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UC494AN

Specifications

SKU: 326108

BUY UC494AN https://www.utsource.net/itm/p/326108.html
Advanced Regulating Pulse Width Modulators
Parameter Description Min Typ Max Unit
Supply Voltage (Vcc) Operating supply voltage range 7.5 - 40 V
Control Voltage (Vc) Control voltage range 0 - 5 V
Oscillator Frequency (fosc) Oscillator frequency range 1 - 500 kHz
Duty Cycle Adjustable duty cycle range 0 - 100 %
Output Current (Iout) Maximum output current - 1 2.5 A
Quiescent Current (Iq) Quiescent current at Vcc = 15V - 1.5 - mA
Temperature Range (Tamb) Ambient operating temperature range -40 - 125 °C
Storage Temperature (Tstg) Storage temperature range -65 - 150 °C

Instructions for Using the UC494AN

  1. Power Supply:

    • Ensure the supply voltage (Vcc) is within the range of 7.5V to 40V.
    • Connect the Vcc pin to the power supply and ground the GND pin.
  2. Control Voltage:

    • Apply the control voltage (Vc) to the control input pin to adjust the output duty cycle.
    • The control voltage should be between 0V and 5V.
  3. Oscillator Configuration:

    • Set the oscillator frequency (fosc) by connecting external components (resistors and capacitors) to the oscillator pins.
    • The frequency can be adjusted from 1kHz to 500kHz.
  4. Output Stage:

    • The UC494AN can drive loads with a maximum output current of 2.5A.
    • Ensure the load does not exceed this limit to avoid damage.
  5. Temperature Considerations:

    • Operate the device within the ambient temperature range of -40°C to 125°C.
    • Store the device within the storage temperature range of -65°C to 150°C.
  6. Quiescent Current:

    • The quiescent current at Vcc = 15V is typically 1.5mA. This value should be considered in power budget calculations.
  7. Protection:

    • Implement appropriate protection circuits (e.g., overvoltage, overcurrent) to ensure reliable operation.
    • Use heat sinks or other cooling methods if operating at high temperatures or under heavy loads.
  8. Layout Considerations:

    • Follow good PCB layout practices to minimize noise and interference.
    • Keep signal traces short and use decoupling capacitors close to the power supply pins.

By following these instructions, you can ensure optimal performance and reliability of the UC494AN in your application.

(For reference only)

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