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SMH4803A Datasheet(PDF) 9 Page - Summit Microelectronics, Inc. |
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SMH4803A Datasheet(HTML) 9 Page - Summit Microelectronics, Inc. |
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9 / 19 page  9 2051 4.4 3/15/01 SMH4803A Preliminary SUMMIT MICROELECTRONICS, Inc. Resetting FAULT# When the circuit breaker trips the VGATE output is turned off and FAULT# is driven low. There are two methods to reset the circuit breaker which are selectable with the MODE pin. When MODE is held high or left floating the circuit breaker is in the duty-cycle mode, and the breaker resets automatically after a time of t CYC. When the MODE pin is held low the circuit breaker can be reset by bringing RESET# low. T PDD after bringing RESET# back high again the VGATE output will attempt to restart the MOSFET slew control circuitry. In either case, cycling power to the board will also reset the circuit breaker. If the over current condition still exists after the MOSFET switches back on the circuit breaker will re-trip. Figure 2. Circuit Breaker Cycle Mode, RESET# High CBSENSE VGATE TCBD TCBD TCYC 2051 Fig02 1.0 50mV Figure 3. Circuit Breaker Timing — Reset Mode Figure 4. Circuit Breaker Timing — Quick Trip Figure 5. Under-/Over-Voltage Filter Timing Figure 6. Effect of Temperature on Current Con- sumption Over Voltage Range 2051 Fig03 1.0 CBSENSE RESET# VGATE TCBD TPDD 50mV TRST 2051 Fig04 1.0 CBSENSE VGATE <TCBD TFSTSHTDN 50mV VQCB 2051 Fig05 2.0 OV / UV FAULT# tUOFLTR 2.5V IDD (mA) 2051 Fig06 13 12 11 10 9 0 10 12 4 68 2 Temp, ºC –40 0 25 85 125 |
Similar Part No. - SMH4803A |
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Similar Description - SMH4803A |
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