HV301 SUTEX [Supertex, Inc], HV301 Datasheet
HV301
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HV301 Summary of contents
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... 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 ...
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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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... PWRGD Output It is critical to have a detailed understanding of the ENABLE input circuitry of the load (DC/DC PWM Converter) in order to make the correct choice between the HV301 or HV311. Many DC/DC PWM Converters reference their ENABLE inputs to the negative input terminal. If the ENABLE input is active LOW GND R1 487kΩ ...
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... However, if the DC/DC PWM Converter with the ENABLE input circuit configuration was active 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 ...
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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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... V DD PWRGD R1 487kΩ HV301/ 6.81kΩ HV311 9.76kΩ RAMP V EE SENSE GATE 10nF -48V R4 60mΩ is close to OV IRF530 1 ENABLE / ENABLE +5V Cload DC/DC COM PWM CONVERTER D1 Q1 IRF530 Application Circuit 13 HV301/HV311 pins, full reverse DD ...
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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 ...