HV9931 Supertex, Inc., HV9931 Datasheet
HV9931
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HV9931 Summary of contents
Page 1
... R ref1 General Description The HV9931 is a fi xed frequency PWM controller IC designed to control an LED lamp driver using a single-stage PFC buckboost-buck topology. It can achieve a unity power factor and a very high step-down ratio that enables driving a single high-brightness LED from the 85-264VAC input without a need for a power transformer. This topology allows reducing the fi ...
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... L = Lot Number “Green” Packaging 8-Lead SOIC (LG) Max Units Conditions 450 V DC input voltage PWMD connected to GND, 1 12V 450V DD(EXT) GATE open 6. rising --- 1 8.0 - 450V 8.0 - 450V IN 150 kΩ 5.0V PWMD HV9931 RT CS2 VDD PWMD = 0, ...
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... Regulator 7.5V S Leading Edge R Q Blanking HV9931 3 HV9931 Units Conditions 10mA GATE -10mA GATE 500pF GATE 500pF GATE 12V -50mV IN CS1 CS2 -0.15mV CS1 CS2 ...
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... DD reference for the current sense comparators. The regulator is equipped with an under-voltage protection circuit which shuts off the HV9931 when the voltage at the VDD pin falls below 6.2V. The VDD pin must be bypassed by a low ESR capacitor (≥ 0.1µF) to provide a low impedance path for the high frequency current of the output GATE driver ...
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... The V of the HV9931 can be used as the reference voltage. If more accuracy is needed, an external reference voltage can be applied. When either the CS1 or the CS2 pin voltage falls below GND, the GATE pulse is terminated ...
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... GATE This pin is the output GATE driver for an external N-channel power MOSFET. When this pin is pulled to GND, switching of the HV9931 is disabled. When the PWMD pin 5 PWMD is released, or external TTL high level is applied to it, switching will resume. This feature is provided for applications that require PWM dimming of the LED lamp ...
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... This dimension is not specifi the original JEDEC drawing. The value listed is for reference only. Drawings are not to scale. (The package drawing(s) in this data sheet may not refl ect the most current specifi cations. For the latest package outline information go to http://www.supertex.com/packaging.html.) Doc.# DSFP-HV9931 NR042408 E E1 ...