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UCC3809-1
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UCC3809-1

  • Category:ACDC- and -DCDC-power supply
  • Product Name:Economical primary-side controller
  • Manufacturers:TI
  • Production Batch Number:10+
  • Encapsulation:8MSOP, 8PDIP, 8SOIC, 8TSSOP
  • Stock Status:There is stock
  • Stock Quantity:6000
  • Minimum order quantity: 1
  • Details:Click here to find a pdf of the UCC3809-1
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  • Product introduction

The economical BCDMOS and other low power integrated circuits UCC3809 series contain all control and drive circuitry for off-line requirements and isolated DC-to-DC fixed-frequency current mode switching with minimal external component count power supplies. The internal implementation undervoltage lockout circuit includes a user-accessible voltage reference with a start-up current of less than 100μA, logic to ensure lockout operation, PWM comparator, totem pole output, and a stage that sinks or supplies peak current. Output stage, driving N-channel MOSFETs suitable for low off.

The oscillator frequency and maximum duty cycle are programmed with two resistors and one capacitor. The UCC3809 series also features a full-cycle soft-start.

characteristic
 
  • User-programmable soft-start with active low shutdown
  • User-programmable maximum duty cycle
  • Accessible 5V reference
  • Undervoltage lockout
  • Runs up to 1MHz
  • 0.4A Source/0.8A sink FET driver
  • The low start-up current is 100μA
parameter
      UCC3809 - 1  
topology     Boost, buck, reverse, forward  
Control method     Current mode  
Duty cycle (max.) (%)     70  
Frequency (max) (khertz)     1000  
On/Off of Undervoltage Lockout Threshold (5)     10 / 8  
Pins/Packets     8MSOP，8PDIP，8SOIC，8TSSOP  
(#) Regulated output     One  
Operating temperature range(°C)     0 to 70  

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