Datasheet LT3751 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | High Voltage Capacitor Charger Controller with Regulation |
| Pages / Page | 34 / 9 — BLOCK DIAGRAM |
| File Format / Size | PDF / 651 Kb |
| Document Language | English |
BLOCK DIAGRAM
Model Line for this Datasheet
Text Version of Document
LT3751
BLOCK DIAGRAM
T1 D1 VTRANS 12V + 1:10 V • OUT Y 450V 47µF RV Y TRANS 10µF ×2 40.2k + PRIMAR COUT V RV • SECONDAR OUT TRANS CHARGE COMPARATOR – 0.98V 60V OFF ON REFERENCE START-UP OTLO RV ONE-SHOT RVOUT OUT 40.2k V + CC VCC MASTER DIFF. AMP 12V LATCH COMPARATOR 60V 100k DONE 10µF DCM WITH S R COMPARATOR – INTERNAL R RDCM DCM Q Q 18.2k ENABLE 60V CLAMPS GATE DCM 100k DRIVER ONE-SHOT + 60V 1.22V FAULT REFERENCE V S R DRAIN FAULT V Q Q LATCH 26kHz ONE-SHOT CC CLOCK HVGATE GATE DRIVE INTERNAL S Q CIRCUITRY M1 UVLO R Q 3.8V + SWITCH LATCH CLAMP VCC – VCC RUVLO1 191k UVLO1 LVGATE VTRANS – RESET VCC 55V CLK AUXILIARY COUNT + + COUNTER 162mV ROVLO1 OVLO1 – +– 240k + 26kHz 55V ONE-SHOT MAIN CSP – CLOCK + RSENSE UVLO/OVLO 106mV CSN 12mΩ RUVLO2 UVLO2 COMPARATORS – +– 191k VCC – TIMING AND PEAK 55V CURRENT CONTROL 11mV TO 106mV + TO CHARGE MODULATION ONE-SHOT 26kHz ERROR ONE-SHOT AMP + 1.22V R REFERENCE OVLO2 CLOCK OVLO2 240k A1 + – 55V – + – RFBH FB 3.65M TO V DIE OUT MODE TEMP 160ºC 1.22V COMPARATOR CONTROL REFERENCE R 10nF FBL GND RBG 10k 3751 BD RBG 1.33k 3751fd For more information www.linear.com/LT3751 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
BLOCK DIAGRAM
T1 D1 VTRANS 12V + 1:10 V • OUT Y 450V 47µF RV Y TRANS 10µF ×2 40.2k + PRIMAR COUT V RV • SECONDAR OUT TRANS CHARGE COMPARATOR – 0.98V 60V OFF ON REFERENCE START-UP OTLO RV ONE-SHOT RVOUT OUT 40.2k V + CC VCC MASTER DIFF. AMP 12V LATCH COMPARATOR 60V 100k DONE 10µF DCM WITH S R COMPARATOR – INTERNAL R RDCM DCM Q Q 18.2k ENABLE 60V CLAMPS GATE DCM 100k DRIVER ONE-SHOT + 60V 1.22V FAULT REFERENCE V S R DRAIN FAULT V Q Q LATCH 26kHz ONE-SHOT CC CLOCK HVGATE GATE DRIVE INTERNAL S Q CIRCUITRY M1 UVLO R Q 3.8V + SWITCH LATCH CLAMP VCC – VCC RUVLO1 191k UVLO1 LVGATE VTRANS – RESET VCC 55V CLK AUXILIARY COUNT + + COUNTER 162mV ROVLO1 OVLO1 – +– 240k + 26kHz 55V ONE-SHOT MAIN CSP – CLOCK + RSENSE UVLO/OVLO 106mV CSN 12mΩ RUVLO2 UVLO2 COMPARATORS – +– 191k VCC – TIMING AND PEAK 55V CURRENT CONTROL 11mV TO 106mV + TO CHARGE MODULATION ONE-SHOT 26kHz ERROR ONE-SHOT AMP + 1.22V R REFERENCE OVLO2 CLOCK OVLO2 240k A1 + – 55V – + – RFBH FB 3.65M TO V DIE OUT MODE TEMP 160ºC 1.22V COMPARATOR CONTROL REFERENCE R 10nF FBL GND RBG 10k 3751 BD RBG 1.33k 3751fd For more information www.linear.com/LT3751 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
