HV9986 Supertex, Inc., HV9986 Datasheet
HV9986
Related parts for HV9986
HV9986 Summary of contents
Page 1
... It can be used for driving either RGB LEDs or multiple channels of white LEDs. The HV9986 features a 40V linear regulator, which provides a 5V supply to power the IC. The switching frequencies of the three converters in the IC are controlled either with an external clock signal (the channels operate at a switching frequency of 1/12th of the external clock frequency) or using the internal oscillator ...
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... EN ≥ 2.0V; PWMD1 = PWMD2 = 1.5 mA PWMD3 = GND 40V HIGH; IN 5.25 V PWMD1 GATE1-3 = 1.0nF; CLK = 6.0MHz 4. rising falling DD < +85 C are guaranteed by design and characterization ● Tel: 408-222-8888 ● www.supertex.com HV9986 VDD3 FLT3 CS3 COMP3 FBDK3 IREF3 OVP3 CLK RT STATUS3 ...
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... V OVP rising - mV OVP falling 250 ns --- 100mV overdrive to the current 200 ns sense comparator 300 Ω GATE = Low - MHz 75pF capacitance at COMP pin - dB Output open 3.0 V --- V - --- DD 750 μA/V --- 5.0 mV --- 1.0 nA --- - - --- < +85 C are guaranteed by design and characterization ● Tel: 408-222-8888 ● www.supertex.com HV9986 ...
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... RT = 400kΩ kHz RT = 100kΩ kHz --- ns 500pF capacitor at FLT pin ns 500pF capacitor at FLT pin ns --- - --- V REF = GND ns FDBK = 2 • REF + 0.1V 0 1.0mA SINK 0.8 V --- - V --- kΩ 5.0V RST < +85 C are guaranteed by design and characterization ● Tel: 408-222-8888 ● www.supertex.com HV9986 ...
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... FCA + DELAY PWMDA PWMDA FCA FDA ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 5 VDD POR UVLO RESET PWMDA Q FCA Q 1 BLANKING - CLKA 1 PWMDA 0.2V BLANKING PWMDA FCA 1 ● Tel: 408-222-8888 ● www.supertex.com HV9986 GND RST VDD1 GATE1 CS1 GND1 REF1 FDBK1 COMP1 ...
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... RT pin can be either left open or connected to VDD. Current Sense (CS1-3) The current sense input is used to sense the source current of the switching FET. Each CS input of the HV9986 includes a built-in 100ns (minimum) blanking time to prevent spurious turn off due to the initial current spike when the FET turns on. ...
Page 7
... Linear Dimming Linear Dimming can be accomplished in the HV9986 by varying the voltages at the REF pins. Since the HV9986 is a peak current mode controller, it has a minimum on-time for the GATE outputs. This minimum on-time will prevent the converters from completely turning off even when the REF pins are pulled to GND ...
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... The HV9986 is a robust controller which can protect the LEDs and the LED driver in case of fault conditions. The outputs of the HV9986 LED driver are protected from both an open and a short LED condition. In both cases, the HV9986 shuts down the channel with the fault and reports a fault condition to the controlling microprocessor ...
Page 9
... FET is turned on. If this spike is detected by the short circuit comparator, it will cause the IC to falsely detect an over current condition and shut down. In the HV9986, to prevent these false trigger events, a built- in 500ns blanking network for the short circuit comparator is included. This blanking network is activated when the PWMD input goes high ...
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... Layout Guidelines Input Return Terminal Star Connection of GND Reference Supertex inc. GND1 VDD1 HV9986 REF1 VDD REF2 GND GND Tab Connection ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 10 VDD Connection GND2 VDD2 GND3 VDD3 REF3 REF Connection ● Tel: 408-222-8888 ● www.supertex.com HV9986 ...
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... REF3 7 OVP1 These pins provide the over voltage protection for the three channels. When the voltage at any of 14 OVP2 these pins exceeds 1.25V, the HV9986 is turned off. The fault channel cannot be reset until the voltage drops below 1.125V. 24 OVP3 8 VIN Input of the internal 40V linear regulator. ...
Page 12
... A resistor at this pin programs the on-board oscillator external clock is being used, this pin should connected to VDD. This pin is the clock input for the HV9986. The input to the CLK pin should be a TTL compatible square wave signal. The three channels will switch at 1/12th the switching frequency of the signal applied at 23 CLK the CLK pin. This pin is used if more than one HV9986’ ...
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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-HV9986 A120610 θ ...