Microchip HV9980DB1 Manual


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Supertex inc.
Supertex inc.
www.supertex.com
HV9980DB1
Doc.# DSDB-HV9980DB1
A032913
General Description
The HV9980B1 demoboard is an RGB or multi-channel
white LED backlight driver designed to drive LEDs for
a large-screen TV. The HV9980DB1 can drive three
common-anode LED strings from a 100 - 140V input at
currents up to 70mA in steady state. It can also drive the
LEDs at currents as large as 160mA for short durations to
facilitate backlight scanning mode.
Each of the three channels can be individually controlled
by PWM dimming. The demoboard is also protected from
short circuit conditions across any string and recovers
automatically once the condition disappears.
Connection Diagram
3-Channel LED Array Driver IC
Specications
Parameter Value
Input voltage (VIN) 100 - 140V
IC supply voltage (VDD) 6.0 - 10V
Output voltage 20V (min)
< ½ of input voltage (max)
Output current (steady state) 70mA (max)
Output current (short durations) 160mA (max)
Switching frequency (requires an
external 1.8MHz clock signal) 300kHz
REF input 0 - 1.0V
Output current ripple (typ) <5% peak - peak
Efciency (@ 120V input and
40V, 50mA output) ~90%
Open LED protection YES
Output short circuit protection YES
Actual Board Size: 68.8mm x 36.1mm
+
-
+
-
120V
0 - 0.9V
8.0V
+
-


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV9980DB1

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