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SMH4803DHKP Datasheet(PDF) 2 Page - Summit Microelectronics, Inc. |
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SMH4803DHKP Datasheet(HTML) 2 Page - Summit Microelectronics, Inc. |
2 / 22 page 2 SMH4803 2041 8.4 6/15/00 SUMMIT MICROELECTRONICS Symbol Pin Description Drain Sense 1 Drain sense input Vgate 2 Output to MOSFET gate EN/TS 3 Enable/Temp Sense input PD1# 4 Pin Detect 1 (active LO) PD2# 5 Pin Detect 2 (active LO) CBFault# 6 Circuit Breaker Fault output CBReset# 7 Circuit Breaker Reset intput CBMode 8 Circuit Breaker Mode control CBSense 9 Cicruit Breaker Sense input Vss 10 Negative Supply Connection UV 11 Under Voltage input OV 12 Over Voltage input 5V 13 5V reference output 2.5V 14 2.5V reference output ENPGB 15 Enable input B ENPGA 16 Enable input A PG3# 17 Power good output 3 PG1# 18 Power good output 1 PG2# 19 Power good output 2 Vdd 20 Positive supply connection 2041 PGM T2.1 PIN CONFIGURATIONS RECOMMENDED OPERATING CONDITIONS Condition Min Max Temperature -40°C +85°C 2041 PGM T3.0 1 2 3 4 5 6 7 8 9 10 16 15 14 13 12 11 19 20 17 18 2041 ILL10.1 Drain Sense Vgate EN/TS PD1# PD2# CBFault# CBReset# CBMode CBSense Vss Vdd PG2# PG1# PG3# ENPGA ENPGB 2.5V 5V OV UV DESCRIPTION The SMH4803 is designed to control hot swapping of plug-in cards operating from a single supply ranging from 20V to 500V. The SMH4803 hot-swap controller provides under-voltage and over-voltage monitoring of the host power supply, it drives an external power MOSFET switch that connects the supply to the load, and also protects against over-current conditions that might disrupt the host supply. When the input and output voltages to the SMH4803 controller are within specification, the SMH4803 provides three “Power Good” logic outputs that may be used to turn ON the loads, e.g. isolated-output DC- DC converters, or drive LED status lights. The SMH4803 provides three separate “Power Good” logic outputs that activate loads in a timed sequence. Additional features of the SMH4803 include: temperature sense or master en- able input, 2.5V and 5V reference outputs for expanding monitor functions, two “Pin-Detect” enable inputs for fault protection, and duty-cycle or latched over-current protec- tion modes. |
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