HV9967 Supertex, Inc., HV9967 Datasheet
HV9967
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HV9967 Summary of contents
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... Supertex inc. Integrated LED Driver General Description The HV9967 is an open loop average-mode current control LED driver IC operating in a constant off-time mode. The IC features an integrated 60V 0.8Ω MOSFET that can be used as a stand-alone buck converter switch, or connected as a source driver output for driving an external high-voltage depletion- mode MOSFET ...
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... DD DD Typ Max Units Conditions - input voltage 0.5 1.0 mA Pin PWMD to GND 5.25 V PWMD = rising needed to ensure I 150 - mV V falling DD - 0.8 V --- - - V --- 100 150 kΩ 5.0V PWMD O C < T < + ● Tel: 408-222-8888 ● www.supertex.com HV9967 VDD AGND =100kΩ T C(MIN) ...
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... RSENSE 800 - μs --- - 400 RSENSE 400kΩ μ 100kΩ T 1.0 1 10kΩ T 0.8 - Ω 5. 4.75V 370mV, V RSENSE - - O C --- --- O C < T < + ● Tel: 408-222-8888 ● www.supertex.com HV9967 + 50mV CS(TH) + 50mV CS(SHORT) + 50mV CS(SHORT) =10V SW ...
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... IN 0.41V Application Information General description The HV9967 employs Supertex’ proprietary control scheme achieving fast and very accurate control of average current in the buck inductor through sensing the switch current only. No compensation of the current control loop is required. The LED current response to PWMD input is similar to that of the peak-current control ICs, such as HV9910B ...
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... SW input. PWM Dimming The HV9967 features a TTL compatible dimming input PWMD. Applying a square-wave voltage to PWMD will mod- ulate the duty ratio of the LED current accordingly. The rising and falling edges are limited by the current slew rate in the inductor. The fi ...
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... Resistor connected between RT and VDD programs the off-time of SW. 7 AGND Analog ground (0V). Power supply for all internal circuits. Bypass with a low ESR capacitor to PGND (>0.5μF). 8 VDD Connect gate of external depletion-mode NFET for high-voltage operation. Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 6 ● Tel: 408-222-8888 ● www.supertex.com HV9967 ...
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... No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the ©2010 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-HV9967 A122110 E E1 Seating ...