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UCC35701D 数据表(PDF) 1 Page - Texas Instruments |
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UCC35701D 数据表(HTML) 1 Page - Texas Instruments |
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1 / 24 page UCC15701/2 UCC25701/2 UCC35701/2 Advanced Voltage Mode Pulse Width Modulator DESCRIPTION The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source. The devices feature low startup current, allowing for efficient off-line start- ing, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz. Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range. An accurate volt-second clamp and maximum duty cycle limit are also featured. Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has oc- curred. Two UVLO options are offered. UCC35701 family has turn-on and turn-off thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V. The UCC35701/2 and the UCC25701/2 are offered in the 14 pin SOIC (D), 14 pin PDIP (N) or in 14 pin TSSOP (PW) packages. The UCC15701/2 is offered in the 14 pin CDIP (J) package. 3 VDD 12 VREF 8FB 4 OUT 2 ILIM 5 PGND C3 1 COUNT CF 14 SS CS 11 SYNC 9VSCLAMP VREF 10 CT CT 7RT 6 VFF 13 GND VIN SUPPLY VIN RETURN RGND R10 RCS R8 R7 R6 C2 R8 RF R5 R4 R3 R2 R1 VOUT UCC35701 C1 C4 C6 R12 C6 C5 R11 R13 C7 R14 VOUT R15 TYPICAL APPLICATION DIAGRAM SLUS293C - JANUARY 2000 - REVISED JUNE 2005 FEATURES 700kHz Operation Integrated Oscillator/ Voltage Feed Forward Compensation Accurate Duty Cycle Limit Accurate Volt-second Clamp Optocoupler Interface Fault Counting Shutdown Fault Latch off or Automatic Shutdown Soft Stop Optimized for Synchronous Rectification 1A Peak Gate Drive Output 130 mA Start-up Current 750 mA Operating Current UDG-98005-1 application INFO available |
类似零件编号 - UCC35701D |
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类似说明 - UCC35701D |
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