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PDF IR2172 Data sheet ( Hoja de datos )

Número de pieza IR2172
Descripción LINEAR CURRENT SENSING IC
Fabricantes International Rectifier 
Logotipo International Rectifier Logotipo



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No Preview Available ! IR2172 Hoja de datos, Descripción, Manual

ADVANCE INFORMATION Data Sheet No. PD60176-C
IR2172
LINEAR CURRENT SENSING IC
Features
Floating channel up to +600V
Monolithic integration
Linear current feedback through shunt resistor
Direct digital PWM output for easy interface
Low IQBS allows the boot strap power supply
Independent fast overcurrent trip signal
High common mode noise immunity
Input overvoltage protection for IGBT short circuit
condition
Open Drain outputs
Product Summary
VOFFSET
IQBS
Vin
Gain temp.drift
600Vmax
1mA
+/-260mVmax
20ppm/oC (typ.)
fo
Overcurrent trip
signal delay
40kHz (typ.)
1.5usec (typ)
Description
IR2172 is the monolithic current sensing IC designed
for motor drive applications. It senses the motor phase
current through an external shunt resistor, converts from
analog to digital signal, and transfers the signal to the
low side. IR’s proprietary high voltage isolation technol-
ogy is implemented to enable the high bandwidth signal
processing. The output format is discrete PWM to elimi-
nate need for the A/D input interface. The dedicated
overcurrent trip (OC) signal facilitates IGBT short cir-
cuit protection. The OC output pulse can be programmed
by the external resistor and capacitor. The open-drain
outputs make easy for any interface from 3.3V to 15V.
Overcurrent trip level
Packages
8 Lead SOIC
+/-260mV (typ.)
8 Lead PDIP
16 Lead SOIC
(wide body)
Block Diagram
15V
PWM Output
GND
Overcurrent
VCC
V+
PO V-
IR2172
COM
VB
OC VS
Up to 600V
To Motor Phase

1 page




IR2172 pdf
ADVANCE INFORMATION
Lead Definitions
Symbol Description
VCC
COM
Low side and logic supply voltage
Low side logic ground
VIN+
VIN-
VB
VS
PO
Positive sense input
Negative sense input
High side supply
High side return
Digital PWM output
OC Overcurrent output (negative logic)
N.C. No connection
IR2172
Lead Assignment
1 VCC
2 PO
3 COM
4 OC
VIN+ 8
VIN- 7
VB 6
VS 5
8 lead SOIC
IR2172S
1 VCC
2 PO
3 COM
4 OC
VIN+ 8
VIN- 7
VB 6
VS 5
8 lead PDIP
IR2172
1 NC
2 NC
3 VCC
4 PO
5 COM
6 OC
7 NC
8 NC
NC 16
NC 15
VIN+ 14
VIN- 13
VB 12
VS 11
NC 10
NC 9
16 lead SOIC
IR21726S
www.irf.com
5

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