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UCC2897A Electronic IC Chips microchips and integrated circuits

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Country/Region:china

Tel:86-755-88367702

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UCC2897A Electronic IC Chips microchips and integrated circuits

Model Number UCC2897A
Certification new & original
Place of Origin original factory
Minimum Order Quantity 10pcs
Price Negotiate
Payment Terms T/T, Western Union, Paypal
Supply Ability 7700pcs
Delivery Time 1 day
Packaging Details Please contact me for details
Description Flyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-TSSOP
Line input voltage 120 V
Supply voltage 16.5 V
Analog inputs −0.3 to (VREF + 0.3) V
Operating junction temperature −55 to 150 °C
Storage temperature −65 to 150 °C
Lead temperature 300 °C
Detailed Product Description

 

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UCC2897A

ADVANCED CURRENT-MODE ACTIVE CLAMP PWM CONTROLLER

 

FEATURES

  • Low Output Jitter
  • “Soft Stop” shut down of MAIN and AUX
  • 110-V Input Startup Function
  • Ideal for Active Clamp/Reset Forward, Flyback and Synchronous Rectifier Uses

 

  • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with 0.5-V Cycle-by-Cycle Current Limiting
  • Hiccup Mode 0.75-V Current Limit
  • TrueDriveTM 2-A Sink, 2-A Source Outputs

 

  • Trimmed Internal Bandgap Reference for Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • High-Performance 1.0-MHz Synchronizable Oscillator with Internal Timing Capacitor
  • Precise Programmable Maximum Duty Cycle
  • PB-Free Lead Finish Package

APPLICATIONS

  • High-Efficiency DC/DC Power Supplies
  • Server Power, 48-V Telecom, Datacom, and 42-V Automotive Applications

DESCRIPTION

The UCC2897A PWM controller simplifies implementation of the various active clamp/reset and synchronous rectifier switching power topologies.

 

The UCC2897A is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active clamp operation.

 

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal timing capacitor. An accurate line monitoring function also programs the converter’s ON and OFF transitions with regard to the bulk input voltage, VIN.

 

The UCC2897A adds a second level hiccup mode current sense threshold, bi-directional synchronization and input overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) package.

 

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range unless otherwise noted(1)

Line input voltage, VIN 120V
Supply voltage, VDD(IDD < 10 mA)116.5V
Analog inputsFB, CS, SYNC, LINEOV, LINEUV−0.3 to (VREF + 0.3)V
Output source current (peak), IO_SOURCEOUT, AUX2.5A
Output sink current (peak), IO_SINK-2.5
Operating junction temperature range, TJ−55 to 150°C
Storage temperature, Tstg−65 to 150°C
ESD ratingHuman body model, (HBM)2000V
Charged device model (CDM)500
Lead temperature, Tsol, 1,6 mm (1/16 inch) from case for 10 seconds300°C

 

(1) 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. All voltages are with respect to GND. Currents are positive into and negative out of, the specified terminal.

 

TYPICAL APPLICATION DIAGRAM

 

 

 

Product Tags: electronic integrated circuit   linear integrated circuits  
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