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| HV7802 Datasheet, PDF (1/5 Pages) Supertex, Inc – High Side Current Monitor 8V to 450V, Confi gurable Output | |||
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HV7802
High Side Current Monitor
8V to 450V, Conï¬gurable Output
Features
⺠Supply voltage 8V to 450V
⺠Conï¬gurable as a current or voltage output device
⺠Maximum sense ampliï¬er offset of 5mV
⺠Max VSENSE of 500mV
⺠Fast rise and fall times, from 700ns to 1.4µs
⺠Maximum quiescent current of 50µA
Applications
⺠SMPS current monitor
⺠Battery current monitor
⺠Motor control
General Description
The HV7802 high side current monitor IC contains a
transconductance ampliï¬er which translates a high side
current measurement voltage into an output current with
resistor programmable transconductance gain. An optional
second resistor transforms this output current into an output
voltage with an overall voltage gain set by the ratio of the two
resistors.
The measurement voltage typically originates at a current
sense resistor, which is located in a âhigh sideâ circuit, for
example a circuit not directly associated with ground.
This monitor IC features a very wide input voltage range,
conï¬gurable gain, small size, low component count, low power
consumption, ease of use, and low cost. Ofï¬ine applications,
battery, and portable applications can be served equally well
due to the wide input voltage range and the low quiescent
current.
Typical Application Circuit
8V to 450V Input
VSENSE
RSENSE
ISENSE
RA
RP
IOUT = VSENSE / RA
VOUT = RB â IOUT
GV = RB / RA
IN
RA LOAD
HV7802
R
GND
OUT
IOUT
RB
VOUT
V
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