Summary High Side Current Monitor
Applications: 3 1
LED driver current
Battery current monitor
DC Motor controls BIAS
Typical Application Circuit
The HV7800 is a high side current sense IC, which senses the voltage across an external
current sense resistor located on the power or “high” side of the circuit and translates this
voltage to the ground referenced circuit at a gain of 1 and a typical accuracy of ± 1%.
High side current sensing allows the ground or return to be undisturbed when sensing
input or load currents. It also allows for simpler implementation of current monitor circuits.
The HV7800 has a wide operating range of 8V-450VDC, which enables use in DC power
systems of 12V/24V/48V, and also AC off line voltage of 85VAC to 265VAC.
The HV7800 has a fast response times which allows use of this current monitor in the feedback
loop of switching power supply or LED current driver applications.
Wide input range: 8V to 450V DC Can be used for multiple applications with a single device
Provides accurate information for current monitor or control loop
Gain accuracy of +/-1%
Low power dissipation. Does not need extra parts or heat sink for
Maximum quiescent current of 30uA
high voltage operation.
Bandwidth of 500KHz. Can be used in switch-mode applications
Fast rise and fall times
with frequencies of <500KHz.
031306 Supertex inc.
High Side Current Monitor
Ordering Information / Availability
Part Number Package Option Samples Lead Time
HV7800K1-G 5 Pin SOT-23 (Green) Now 4-5 Weeks
-G indicates the part is RoHS compliant (Green).
For any questions regarding the HV7800, please contact your local area Supertex sales ofﬁce, or contact the
main ofﬁce in the US at:
1235 Bordeaux Drive, Sunnyvale, CA 94089