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UCC28019A Datasheet(PDF) 6 Page - Texas Instruments |
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UCC28019A Datasheet(HTML) 6 Page - Texas Instruments |
6 / 47 page + OVERVOLTAGE 5.25V OVP Input Brown-Out Protection (IBOP) + + VIN ENABLE_th 1.5V S Q Q R VIN BROWNOUT_th 0.82V 5V 20k IBOP + V PCL 1.08V Soft Over Current (SOC) V SOC 0.73V Peak Current Limit (PCL) SOC 40k 40k + -1x 300ns Leading Edge Blanking UVLO + + VCC ON 10.5V S Q Q R VCC OFF 9.5V UVLO R SENSE C OUT L BST R ISENSEfilter + – Bridge Rectifier C ISENSEfilter LINE INPUT D BST V OUT C CV2 R CV C CV1 + gmv Voltage Error Amplifier + gmi C ICOMP S Q Q R PWM Comparator K PC(s) SOC M 2 M 1 EMI Filter VCOMP C IN 5V 65kHz Oscillator R LOAD C VCC Auxiliary Supply Current Amplifier 3 ISENSE 2 ICOMP VINS 4 5 VCOMP 6 VSENSE 7 1 VCC GND 8 GATE GAIN M 1, K1 + UNDERVOLTAGE 4.75V EDR C VINS R VINS1 R VINS2 VCC Gate Driver UVLO IBOP OLP S Q Q R Pre-Drive and Clamp Circuit R FB1 R FB2 Q BST 10k R GATE C VSENSE + PWM RAMP M 2 Min Off Time + Fault Logic Fault FAULT PCL Clock FAULT 4V OVP 0.6V + ICOMP Protection ISOP ISOP + OLP/STANDBY 0.82V OLP/STANDBY 100nA + END OF SOFT-START 4.95V END OF SS S Q Q R EDR END OF SS FAULT g mv Enhancement UCC28019A Block Diagram SS V PRECHARGE Rapid Discharge when VCC < VCC OFF FAULT UVLO UCC28019A SLUS828B – DECEMBER 2008 – REVISED APRIL 2009.................................................................................................................................................. www.ti.com Block Diagram 6 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s): UCC28019A |
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