HV9982 데이터 시트보기 (PDF) - Supertex Inc

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HV9982

Three-Channel, Closed-Loop, Switch Mode LED Driver IC

Supertex Inc 

HV9982

3. REF Connection

In case all the references are going to be driven from

a single voltage source, it is recommended to have a

small R-C low pass filter (1.0k, 1.0nF) at each REF

pin with the filter being referenced to the appropriate

channel’s ground (as in the case of the VDD pins). If

the REF pins are driven with three individual voltage

sources, then just a small capacitor (1.0nF) at each pin

would suffice.

5. OVP protection

Typically, the OVP resistor dividers would be located

away from the IC. To prevent false triggering of the IC

due to noise at the OVP pin, a small bypass capacitor

(1.0nF) right at the OVP pin is recommended.

4. GATE and CS connection

The connection from GATE output to the gate of the ex-

ternal FET as well as the connection from the CS pin to

the external sense resistor made as short as possible

to avoid false triggering.

Layout Guidelines

Input

Return

Terminal

Star

Connection

of GND

Reference

GND1

VDD1

VDD

Connection

GND2 VDD2

GND3

VDD3

HV9982

REF1

REF3

VDD

GND

REF2

GND Tab

Connection

REF

Connection

10

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