HV7800 Datasheet, PDF (1/6 Pages) Supertex, Inc – High Side Current Monitor

Supertex inc.
High Side Current Monitor
HV7800
Initial Release
Features
450V Maximum supply voltage
Voltage output device
1% Typical gain accuracy
500mV Maximum V_SENSE
Fast response: 700ns rise and fall time
50µA Quiescent current (max.)
Applications
LED driver current monitor
SMPS current monitor
Battery current monitor
Motor controls
General Description
The HV7800 is a high side current monitor IC, which
senses the voltage across an external current sense
resistor located in the power or “high” side of the circuit
and translates this voltage to a ground referenced circuit
at a gain of one.
The HV7800 has a wide operating range of 3V-450VDC,
which enables its use in DC power systems of 12V/24V/
48V, and in AC systems operating at voltages from 85VAC
to 265VAC.
The fast response time of the HV7800 allows use of this
current monitor in the feedback loop of a switching power
supply or in LED driver applications.
Typical Application Circuit
400VDC Input
V_SENSE
R_SENSE
3
2
1
HV7800
4
5
I_LOAD
LOAD
V_OUT = I_LOAD • R_SENSE
NR031306
· · · · ^{Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: [phone] FAX: [phone] www.supertex.com}
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