IR2170S Datasheet, PDF (1/5 Pages) International Rectifier – OVER CURRENT SENSING IC

Preliminary Data Sheet No. PD60186-C
IR2170⁽S⁾
OVER CURRENT SENSING IC
Features
• Floating channel up to +600V
• Monolithic integration
• Overcurrent sensing through shunt resistor
• Low IQBS allows the boot strap power supply
• Independent fast 1µsec overcurrent trip signal
• High common mode noise immunity
• Input overvoltage protection for IGBT short circuit
condition
• Open Drain outputs
Product Summary
V_OFFSET
I_QBS
600Vmax
1mA
Overcurrent trip
signal delay
Overcurrent trip level
1.5usec (typ)
+/-260mV (typ.)
Description
Packages
IR2170(S) is the monolithic over current sensing IC de-
signed for motor drive applications. It senses the motor
phase current through an external shunt resistor, de-
tects overcurrent condition, and transfers the signal to
the low side. IR’s proprietary high voltage isolation tech-
nology is implemented to enable the high bandwidth sig-
8-Lead SOIC
nal processing. The dedicated overcurrent trip (OC)
8-Lead PDIP
signal facilitates IGBT short circuit protection. The OC
output pulse width can be programmed by the external resistor and capacitor. The open-drain outputs make easy for
any interface from 3.3V to 15V.
Typical Application
+15V
1Ω
Vdd
DC Bus (up to 600V)
1k
(typ)
V_CC
OC
10 nF
COM
V_B
+ ^VIN+
V_IN-
(AGND) _VS
(DGND)
10 uF
0.47 uF
R_SENSE
To Motor Phase
IR2170
(Circuit Common = DC Bus Negative)
(Refer to Lead Assignments for correct pin configuration). This/These diagram(s) show electrical connections only. Please
refer to our Application Notes and DesignTips for proper circuit board layout.