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UC2853A Fiches technique(PDF) 11 Page - Texas Instruments |
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UC2853A Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 49 page www.ti.com + OLP/STANDBY 0.82V OLP/STANDBY + 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 + PCL -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 ICOMP VCOMP C IN 5V 65kHz Oscillator R LOAD C VCC Auxilary Supply Current Amplifier 3 ISENSE 2 ICOMP VINS 4 5 VCOMP 6 VSENSE 7 1 VCC GND 8 GATE GAIN M 1, K1 EDR + UNDERVOLTAGE 4.75V EDR C VINS R VINS1 R VINS2 VCC Gate Driver UVLO IBOP OLP S Q Q R OVP Pre-Drive and Clamp Circuit R FB1 R FB2 Q BST 10k R GATE C VSENSE + PWM RAMP M 2 Min Off Time + SS EDR Fault Logic Fault 100µA 4V FAULT PCL Clock FAULT 4V UCC28019 SLUS755B – APRIL 2007 – REVISED DECEMBER 2007 Figure 18. Block Diagram Copyright © 2007, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): UCC28019 |
Numéro de pièce similaire - UC2853A |
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Description similaire - UC2853A |
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