HV7802_13 Datasheet, PDF (1/5 Pages) Supertex, Inc – High Side Current Monitor 8V to 450V Configurable Output

Supertex inc.
HV7802
High Side Current Monitor
8V to 450V
Configurable Output
Features
►►Supply voltage 8V to 450V
►►Configurable as a current or voltage output device
►►Maximum sense amplifier offset of 15mV
►►Max V_SENSE of 500mV
►►Fast rise and fall time, from 700ns to 2.0µs
►►Maximum quiescent current of 50µA
Applications
►► SMPS current monitor
►► Battery current monitor
►► Motor control
General Description
The HV7802 high side current monitor IC contains a
transconductance amplifier 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 “high side” circuit, for
example a circuit not directly associated with ground.
This monitor IC features a very wide input voltage range,
configurable gain, small size, low component count, low power
consumption, ease of use, and low cost. Offline, 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
I_OUT = V_SENSE/R_A
V_OUT = R_B • I_OUT
G_V = R_B/R_A
V_SENSE
I_SENSE
R_SENSE
R_A
R_P (optional)
IN
RA
LOAD
HV7802
R
GND
OUT
I_OUT
V_OUT
R_B
V
Doc.# DSFP-HV7802
A062813
Supertex inc.
www.supertex.com