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HV311 Datasheet(PDF) 1 Page - Supertex, Inc |
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HV311 Datasheet(HTML) 1 Page - Supertex, Inc |
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1 / 20 page  1 HV301/HV311 A092605 Not R ecommended Not R ecom men ded For Ne w Designs! For N ew D esign s! HV301/HV311 Hot Swap Controller (Negative Supply Rail) Features ❑ ±10V to ±90V Operation ❑ Built-in “normally on” turn-on clamp eliminates components ❑ UV/OV Lock Out & Power-on-Reset for Debouncing ❑ Sense resistor program ground circuit breaker ❑ Programmable circuit breaker holdoff ❑ Inrush control using either: i) servo or ii) feedback cap ❑ Feedback to Ramp pin means no Gate clamp needed ❑ Application solution for input voltage step (diode “ORing”) ❑ Programmable Auto-Retry (tens of seconds if desired) ❑ Auto-Retry or Latched Operation ❑ Enable through Open Drain interface to UV or OV ❑ Low Power, <0.6mA PWRGD Flag Operation, <0.4mA Sleep Mode ❑ Small SOIC-8 Package Applications ❑ -48V Central Office Switching ❑ -24V Cellular and Fixed Wireless Systems ❑ -24V PBX Systems ❑ Line Cards ❑ -48V Powered Ethernet for VoIP ❑ Distributed Power Systems ❑ Power Supply Control ❑ +48V Storage Networks ❑ Electronic Circuit Breaker Typical Application Circuit Waveforms 5.00ms/div Ordering Information Drain 50V/div V IN 50V/div Gate 5.00V/div I inrush 500mA/div General Description The Supertex HV301 and HV311 Hot Swap Controllers provide control of power supply connection during insertion of cards or modules into live backplanes. They may be used in systems where active control is implemented in the negative lead of supplies ranging from ±10V to ±90V. During initial power application the gate of the external pass device is clamped low to suppress contact bounce glitches by a “normally on” circuit which does not require initialization of the IC. Thereafter the UV/OV supervisors and power-on-reset work together to suppress gate turn on until mechanical bounce has ended. The HV301/311 then control the current inrush limit to a programmed level using one of two possible methods, i) servo control or ii) a drain to ramp capacitor. The above methods eliminate the need for extra hold-off or current limiting compo- nents. The devices also include an electronic circuit breaker, programmed by a sense resistor. After the load capacitance has fully charged, the HV301/311 will transition into a low power mode, and enable the open drain PWRGD. In low power mode the HV301/311 continues to moni- tor the input voltage and monitor the current level. If a load fault occurs, the electronic circuit breaker will trip, the pass element will be turned off, and the PWRGD will return to an (continued on Page 3) VDD UV OV VEE SENSE GATE -48V R4 12.5mΩ R1 487kΩ R2 6.81kΩ R3 9.76kΩ Q1 IRF530 Cload +5V HV301/ HV311 8 3 2 5 4 COM DC/DC PWM CONVERTER 1 GND NOTES: 1. Undervoltage Shutdown (UV) set to 35V. 2. Overvoltage Shutdown (OV) set to 65V. 3. Current Limit set to ~1A. 4. CB set to 8A. PWRGD / PWRGD ENABLE / ENABLE 6 RAMP 7 C1 10nF C2 -48V 0.85nF A092605 f o e t a t S e v i t c A a n g i S d o o G r e w o Pl s n o i t p O e g a k c a P O S n i P 8 H G I HG L 1 0 3 V H W O LG L 1 1 3 V H |
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Similar Description - HV311 |
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