MIC2584/MIC2585 Dual-Channel Hot Swap Controller/Sequencer - Micrel - #2

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MIC2584/2585 Micrel MIC2584/2585 2 March 2005 Typical Application *C5 0.047ìF D2 R6 130kÙ 1% R8 30.9kÙ 1% R9 8.06kÙ 1% R7 13kÙ 1% R3 47kÙ R4 22kÙ R2 10Ù R5 22kÙ VCC1 12V VCC2 3.3V GND PCB EDGE CONNECTOR **BZX84Cxx BACKPLANE CONNECTOR DOWNSTREAM CONTROLLER(S) Downstream Control Signals VCC2 SENSE2 RSENSE2 0.020Ù 1 2 3 4 1 2 VCC1 SENSE1 RSENSE1 0.006Ù 1 2 3 4 24 23 C3 0.01ìF Q2 Si7892DP (PowerPAK™ SO-8) CLOAD1 330ìF VOUT1 12V 6A VOUT2 3.3V CLOAD2 1.5A 330ìF C4 0.01ìF Q1 Si7892DP (PowerPAK™ SO-8) C7 0.033ìF C6 0.02ìF CPOR GND CFILTER 3 22 5 6 7 20 18 19 17 16 15 11 TRK 10 13 9 GATE2 GATE1 OUT2 DIS2 DIS1 FB2 FB1 /POR PG2 PG1 OUT1 12 CDLY 14 /FAULT 21 OV1 4 OV2 8 ON Undervoltage (Output1) = 10.5V Undervoltage (Output2) = 2.95V Overvoltage (Input1) = 13.2V Overvoltage (Input2) = 3.65V START-UP Delay = 2.5ms POR Delay = 10ms Circuit Breaker Response Time = 16ms *C5 (optional) is used to set the delay for VOUT2 with respect to VOUT1 VOUT2 Delay = 9.5ms **D1 is BZX84C18 and D2 is BZX84C8V2 Resistor tolerances are 5% unless specified otherwise. C2 0.47ìF R11 120Ù R15 4.42kÙ 1% R13 14.7kÙ 1% R10 560Ù R12 105kÙ 1% R14 10.7kÙ 1% D1 R1 10Ù C1 0.47ìF /FAULT Signal MIC2585-1 Figure 1. Typical Application Circuit