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LTC1421 Datasheet(PDF) 40 Page - Linear Technology |
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LTC1421 Datasheet(HTML) 40 Page - Linear Technology |
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40 / 40 page  LTC4211 40 4211fb Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com ©LINEAR TECHNOLOGY CORPORATION 2006 LT 0312 REV B • PRINTED IN USA RELATED PARTS TYPICAL APPLICATION LOW COST OVERVOLTAGE PROTECTION There is an alternative method to implementing the over- voltage protection using a resistor divider at the FILTER pin (see Figures 27 and 28). In this implementation, the SLOW COMP is NULL in Normal Mode. Only the FAST COMP circuit breaker is available and the current limit level is 150mV/RSENSE. During the soft-cycle, the inrush current servo loop is at 50mV/RSENSE. So, the heavy load should only turn on at/after the end of second cycle where the RESET pin goes high. Figure 27. LTC4211MS High Side Overvoltage Protection Implementation (In Normal Mode, SLOW COMP Is Disabled. In Soft-Start Cycle, ISOFTSTART Is Still 50mV/RSENSE) Figure 28. LTC4211MS Low Side Overvoltage Protection Implementation (In Normal Mode, SLOW COMP Is Disabled. In Soft-Start Cycle, ISOFTSTART Is Still 50mV/RSENSE) 1 2 3 4 5 10 9 8 7 6 FAULT VCC SENSE GATE FB RESET ON FILTER TIMER GND LTC4211 Q1 Si4410DY R1 3.6k VOUT 5V 5A R2 750Ω CLOAD 4211 F28 RSENSE 0.007Ω + R8 750Ω CTIMER 10nF LONG 5V GND FAULT LONG PCB EDGE CONNECTOR (MALE) BACKPLANE CONNECTOR (FEMALE) SHORT SHORT SHORT RESET ON/OFF R7 10Ω Z1* C1 0.1μF R4 10k R6 10k R5 10k R3 10k Z1 = 1SMA10A OR SMAJ10A * OPTIONAL PART NUMBER DESCRIPTION COMMENTS LTC1421 Two Channels, Hot Swap Controller 24-Pin, Operates from 3V to 12V and Supports – 12V LTC1422 Single Channel, Hot Swap Controller 8-Pin, Operates from 2.7V to 12V LT1640AL/LT1640AH Negative Voltage Hot Swap Controller 8-Pin, Operates from –10V to –80V LT1641-1/LT1641-2 Positive Voltage Hot Swap Controller 8-Pin, Operates from 9V to 80V, Latch-Off/Auto Retry LTC1642 Single Channel, Hot Swap Controller 16-Pin, Overvoltage Protection to 33V LTC1644 PCI Hot Swap Controller 16-Pin, 3.3V, 5V and ±12V, 1V Precharge, PCI Reset Logic LTC1647 Dual Channel, Hot Swap Controller 8-Pin, 16-Pin, Operates from 2.7V to 16.5V LTC4230 Triple Hot Swap Controller with Multifunction Current Control Operates from 1.7V to 16.5V 1 2 3 4 5 10 9 8 7 6 FAULT VCC SENSE GATE FB RESET ON FILTER TIMER GND LTC4211 Q1 Si4410DY R1 36k VOUT 5V 5A R2 15k CLOAD 4211 F27 RSENSE 0.007Ω + CTIMER 10nF LONG 5V GND FAULT LONG PCB EDGE CONNECTOR (MALE) BACKPLANE CONNECTOR (FEMALE) SHORT SHORT SHORT RESET ON/OFF R3 10Ω Z1* C1 0.1μF R5 10k R6 10k R8 4.3k R7 10k R9 750Ω R4 10k Z1 = 1SMA10A OR SMAJ10A * OPTIONAL |
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