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TK75002

Features: ·Eliminates Opto-coupler from Feedback Loop·Replaces TL431 and Eliminates Parasitic Zero·Pulse Transformer Driver·Same Transformer for Any Output Voltage·Peak Current Controlled·Automatic Volt-Second Balancing·Self-running Oscillator·Hi-performance Op-amp & Bandgap Reference·Function...

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SeekIC No. : 004519918 Detail

TK75002: Features: ·Eliminates Opto-coupler from Feedback Loop·Replaces TL431 and Eliminates Parasitic Zero·Pulse Transformer Driver·Same Transformer for Any Output Voltage·Peak Current Controlled·Automatic ...

TK75002 Data Sheet

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Part Number:
TK75002
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/1/11

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Product Details

Description



Features:

·Eliminates Opto-coupler from Feedback Loop
·Replaces TL431 and Eliminates Parasitic Zero
·Pulse Transformer Driver
·Same Transformer for Any Output Voltage
·Peak Current Controlled
·Automatic Volt-Second Balancing
·Self-running Oscillator
·Hi-performance Op-amp & Bandgap Reference
·Functionally Integrated & Simplified 5-pin Design


Application

·Power Supplies with Primary-Side Controller
·Low Isolation-Barrier Capacitance Equipment
·Instrumentation
·Industrial Process Control
·Test Equipment
·Data Acquisition


Pinout

Connection Diagram


Specifications

Supply Voltage ...............................................................7 V
Power Dissipation (Note 1) .................................... 825 mW
Storage Temperature Range ................... ..-55 to +150 °C
Operating Temperature Range .....................-20 to +70 °C
Extended Temperature Range (I) ................ -40 to +85 °C
Operating Voltage Range................................... 1.6 to 12 V
Junction Temperature ............................................. 150 °C
Lead Soldering Temperature (10 s) ........................ 235 °C


Description

The TK75002 monitors the output voltage of a power supply, generates an error signal, and transmits the error signal across an isolation barrier using a small pulse transformer. In conjunction with the pulse transformer, it replaces the TL431/opto-coupler combination and eliminates the undesirable zero created in the feedback loop by that combination. The transformer is driven with pulse amplitude modulation in a free running oscillator configuration. The period of oscillation is proportional to the inductance of the pulse transformer. The magnitude of the voltage pulse is internally limited so that the pulse transformer design need not be changed for various output voltages.

The TK75002 is available in an 8-pin DIP package.




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