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HV301_05 Datasheet(数据表) 3 Page - Supertex, Inc |
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HV301 Datasheet(HTML) 3 Page - Supertex, Inc |
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3 page 
3 HV301/HV311 A092605 Absolute Maximum Ratings V EE reference to VDD pin +0.3V to -100V V PWRGD referenced to VEE Voltage -0.3V to +100V V UV and VOV referenced to VEE Voltage -0.3V to +12V Operating Ambient Temperature -40°C to +85°C Operating Junction Temperature -40°C to +125°C Storage Temperature Range -65°C to +150°C Pinout Pin Description PWRGD – The Power Good Output Pin is held inactive on initial power application and will go active when the external MOSFET is fully turned on. This pin may be used as an enable control when connected directly to a PWM power module. OV – This Over Voltage sense pin, when raised above its high threshold will immediately cause the GATE pin to be pulled low. The GATE pin will remain low until the voltage on this pin falls below the low threshold limit, initiating a new start-up cycle. UV – This Under Voltage sense pin, when below its low threshold limit will immediately cause the GATE pin to be pulled low. The GATE pin will remain low until the voltage on this pin rises above the high threshold limit, initiating a new start-up cycle. V EE – This pin is the negative terminal of the power supply input to the circuit. V DD – This pin is the positive terminal of the power supply input to the circuit. RAMP – This pin provides a current output so that a timing ramp voltage is generated when a capacitor is connected. GATE – This is the Gate Driver Output for the external N- Channel MOSFET. SENSE – The current sense resistor connected from this pin to V EE Pin programs the circuit breaker trip limit. PWRGD (HV301) PWRGD (HV311) OV UV VEE VDD RAMP GATE SENSE 1 2 3 4 8 7 6 5 General Description, cont’d. PWRGD Logic inactive state. Thereafter a programmable auto-retry timer will hold the device off to allow the pass element to cool before resetting and restarting. The auto-retry can be disabled using a single resistor if desired. The HV301/311 includes a current mode servo-circuit which can be used as a return to limit during input voltage steps such as would be seen in a diode “ORed” situation when power switches back to regulated supply from battery operation.The HV301/311 allows independent programming of the trigger level of this phenomenon so that it may be set at a different level to the current limit level if desired. Under all circumstances the maxi- mum servo period is limited to 100ms to protect the pass element. l e d o Mn o i t i d n o CD G R W P 1 0 3 V H ) y d a e R t o N ( E V I T C A N I0 V E E ) y d a e R ( E V I T C A1 Z I H 1 1 3 V H ) y d a e R t o N ( E V I T C A N I1 Z I H ) y d a e R ( E V I T C A0 V E E |
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