HV311 Supertex Inc, HV311 Datasheet
HV311
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HV311 Summary of contents
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... Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. (Negative Supply Rail) General Description The Supertex HV301 and HV311 Hotswap 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 ± ...
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... µ for an IRF530. th HV301/HV311 ...
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... The auto-retry can be disabled using a single resistor if desired. The HV301/HV311 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 ...
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... The HV301 and HV311 are designed to facilitate the insertion of these circuit cards or connection of terminal equipment by eliminating these inrush currents and powering up these circuits in a controlled manner after full connector insertion has been achieved ...
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... Programming Inrush and I load 2 65 × 500 k Ω 500 . × k Ω Ω × 500 Ω 500 × Ω − Ω Ω Ω − − 483 k Ω HV301/HV311 for CB ...
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... Inrush iC × load = ⇒ Inrush = C C load µ × µ × load load ⇒ Inrush 2 . µ × A 100 nF = 750pF = 0.75nF 1 A HV301/HV311 48V Cload GATE Termial Vsense Rsense m Ω = 2.5 A µ dv × load dt µ 2 ...
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... I RAMP C RAMP RAMP START TH C RAMP RAMP SENSE g − LIMIT FB C LOAD ≈ LIMIT RAMP = V − V − INT GS ( LIMIT ) I RAMP HV301/HV311 V GATE GS(lim) t PWRGD Full On ...
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... Try to keep this resistor as big as possible, e.g. 2.5MΩ, for most MOSFETs with max V current source by only 4/2.5MΩ=1.6µA. 8 HV301/HV311 pins may be added to delay the rate of voltage EE Auto-retry can be approximated as a 555-timer with 2.5µA charge up and charge down currents through 8V count of 256 ...
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... Application Information Supported External Pass Devices The HV301 and HV311 are designed to support N-Channel MOSFETs and IGBTs. Selection of External Pass Devices Since the current limit is likely to be set just slightly higher than maximum continuous load current in a typical system, the continuous current rating of the device will have least equal to the current limit value ...
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... V is close to OV. IN then the HV311 can be directly connected as shown below (Application Circuit 1) since the open drain PWRGD output High-Z state until the external MOSFET is fully turned on and the potential on the negative input of the converter is essentially ...
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... HIGH, then the apparent choice of the HV301 would result in the creation of a current path through the protective diode clamp of the ENABLE input and the PWRGD output MOSFET of the HV301. For this situation the HV311 should be used as shown below in Application Circuit 2. GND R1 487kΩ ...
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... HV311 OV R3 9.76kΩ RAMP V EE SENSE GATE 10nF R4 12.5mΩ is close to OV. 12 pin to filter the voltage spikes (Application EE Optocoupler 1 ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER Q1 Application Circuit 4 1 ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER 6 Q1 IRF530 Application Circuit 5 HV301/HV311 ...
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... HV311 OV R3 9.76kΩ RAMP V EE SENSE GATE 10nF Long Pin R4 12.5mΩ ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER 6 Q1 IRF530 Application Circuit 6 1 ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER 6 Q1 IRF530 Application Circuit 7 HV301/HV311 ) end of the R1, ...
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... OV R3 9.76kΩ RAMP V EE SENSE GATE Short 6.2V Pin C1 10nF Long Pin R4 12.5mΩ is close to OV ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER GATE 6 Q1 IRF530 Application Circuit 8 1 ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER Q1 IRF530 Application Circuit 9 HV301/HV311 pin, EE ...
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... PWRGD / PWRGD HV301/ 511kΩ 2 HV311 OV R4 10kΩ RAMP V EE SENSE GATE 10nF R5 12.5mΩ ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER 6 Q1 IRF530 Application Circuit 10 1 ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER 6 Q1 IRF530 Application Circuit 11 HV301/HV311 ...
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... MOSFET, the load will not be protected from reverse polarity voltages. pin PWRGD / PWRGD R1 487kΩ HV311 R2 6.81kΩ 9.76kΩ RAMP V EE SENSE GATE 10nF R4 12.5mΩ ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER Q1 IRF530 Application Circuit 12 HV301/HV311 ...
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... Note: capacitor may be needed to slow PWRGD dv/dt if oscillations are observed when V IN controllers. The HV311 is ideally suited for such applications since two or more active low PWRGD signals can be connected to a single active low ENABLE pin, thus enabling the load as long as at least one primary power source is available. By adding low ...
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... Application Information, cont’d. Use with Negative Ground Either the HV301 or HV311 may be used with any negative ground systems where DC/DC PWM Converters have isolated outputs and their inputs need not be ground referenced (Application Circuit 14). +48V R1 487kΩ 6.81kΩ 9.76kΩ ...
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... RC filter is switched on after the completion of the current limit control function of the hotswap controller PWRGD / PWRGD R1 487kΩ HV301/ 6.81kΩ 2 HV311 OV R3 9.76kΩ RAMP V EE SENSE GATE 12.5mΩ ENABLE/ ENABLE +5V Cload DC/DC COM PWM CONVERTER 6 Q1 IRF530 Application Circuit 15 HV301/HV311 ...
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... GND -48V Note: capacitor may be needed to slow PWRGD dv/dt if oscillations are observed when V is close to OV PWRGD / PWRGD R1 487kΩ HV301 / HV311 6.81kΩ 9.76kΩ RAMP V EE SENSE GATE IRF530 12.5mΩ ...
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... PLCS) C 45° 0° – 8° 0.0275 ± 0.0025 L 0.035 ± 0.015 (0.698 ± 0.064) (0.889 ± 0.381) 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 • FAX: (408) 222-4895 www.supertex.com HV301/HV311 08/26/02 rev.11b ...