HV7801 Datasheet, PDF (1/5 Pages) Supertex, Inc – High Side Current Monitor

HV7801
High Side Current Monitor
8V to 450V, Gain of 5
Features
► Supply voltage 8V to 450V
► Voltage output device
► Typical gain 5±1%
► Max V_SENSE 500mV
► Fast rise and fall times, 700ns to 2µs
► Maximum quiescent current 50µA
Applications
► SMPS current monitor
► Battery current monitor
► Motor control
General Description
The HV7801 high side current monitor IC transfers a high-
side current measurement voltage to its ground referenced
output with an accurate voltage gain of five. 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
applications, battery, and portable applications can be served
well due to the wide input voltage range and the low quiescent
current.
Typical Application Circuit
8V to 450V Input
V_SENSE
I_SENSE
V_OUT = 5 • V_{SENS E}
IN
LOAD
HV7801
GND
OUT
V_OUT
V