HV7800_13 Datasheet, PDF (1/7 Pages) Supertex, Inc – High Side Current Monitor 8.0 to 450V Voltage Gain of 1

Supertex inc.
HV7800
High Side Current Monitor
8.0 to 450V
Voltage Gain of 1
Features
►►Supply voltages from 8V to 450V
►►Voltage output device
►►Typical gain 1±1%
►►Max V_SENSE 500mV
►►Fast rise and fall time, 700ns to 2.0µs
►►Maximum quiescent current 50µA
►►5-Lead SOT-23 Package
Applications
►► SMPS current monitor
►► Battery current monitor
►► Motor controls
►► Telecom
General Description
The HV7800 high side current monitor IC transfers a high-
side current measurement voltage to its ground referenced
output with an accurate voltage gain of one. The measurement
voltage typically originates at a current sense resistor which
is located in a “high side” circuit, such as the positive supply
line.
This monitor IC features a very wide input voltage range, high
accuracy of transfer ratio, 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 of the HV7800.
Typical Application Circuit
8V to 450V Input
V_SENSE
I_SENSE
R_SENSE
R_P (optional)
IN
LOAD
V_OUT = V_SENSE
HV7800
R
GND
OUT
V_OUT
V
Doc.# DSFP-HV7800
A062813
Supertex inc.
www.supertex.com