HV7800K1-G Supertex, HV7800K1-G Datasheet - Page 6

• Manufacturer Part Number: HV7800K1-G
• Description: MOSFET & Power Driver ICs High Side Current Monitor
• Manufacturer: Supertex

Specifications of HV7800K1-G

• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Transient Protection
Add a protection resistor (R
if V
a negative sense, whether in a steady state or in transient
conditions.
A large V
due to the charging and discharging of bulk storage
capacitors. V
as a short circuit condition, or a broken or missing sense
resistor.
An internal 5.0V Zener diode with a current rating of 10mA
protects the sense amplifier inputs. The block diagram
shows the orientation of this diode. The Zener diode provides
clamping at 5.0V for a positive V
negative V
Pin Description
SENSE
Pin #
1
2
3
4
5
can exceed 5.0V in a positive sense or 600mV in
SENSE
SENSE
SENSE
may occur during system startup or shutdown
.
may be large due to fault conditions, such
Pin Name
LOAD
GND
OUT
NC
IN
P
) in series with the LOAD pin
Description
Sense amplifier input. High impedance input with Zener diode protection. Add an external
protection resistor in series with LOAD if V
No connect. This pin must be left floating for proper operation.
Sense amplifier input and supply.
Supply return.
Output with a nominal output resistance of 3.6kΩ. Preservation of accuracy may require
an external buffer amplifier to prevent excessive loading.
SENSE
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1235 Bordeaux Drive, Sunnyvale, CA 94089
and at 600mV for a
6
Under worst case conditions, limit the Zener current to
10mA. A 100kΩ resistor limits the Zener diode current to
4.5mA when V
Note that the protection resistor may affect the bandwidth.
The resistor forms an RC network with the trace and pin
capacitance at the LOAD pin. A capacitance of 5.0pF results
in a time constant of 500ns.
The protection resistor may cause an offset due to bias
current at the LOAD input. Under worst case bias current
(1.0nA), a 100kΩ protection resistor could cause an offset
of 100µV or 0.2% full scale. Note that the bias current is
nominally zero as the LOAD is a high impedance CMOS
input.
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Tel: [phone]
SENSE
SENSE
exceeds the range of -600mV to +5V.
is 450V, whether positive or negative.
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www.supertex.com
HV7800