IR2172 International Rectifier, IR2172 Datasheet - Page 4

• Manufacturer Part Number: IR2172
• Description: IC CURRENT SENSING LINEAR 8-DIP
• Manufacturer: International Rectifier

Specifications of IR2172

• Function: Current Sense
• Voltage - Input: 9.5 ~ 20 V
• Current - Output: 20mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Accuracy: -
• Sensing Method: -
• Other names: *IR2172

IR2172
AC Electrical Characteristics cont.
V
4
Timing Waveforms
Application Hint:
Temperature drift of the output carrier frequency can be cancelled by measuring both a PWM period and
the on-time of PWM (Duty) at the same time. Since both periods vary in the same direction, computing the
ratio between these values at each PWM period gives consistent measurement of the current feedback
over the temperature drift.
Proagation delay characteristics
Symbol
CC
twoc
tdoc
= V
BS
= 15V, unless otherwise specified.
Propagation delay time of OC
Low true pulse width of OC
PO
PO
Definition
Figure 1 Output waveform
Carrier Frequency =
Duty=93%
ADVANCE INFORMATION
40kHz
Duty=7%
Min. Typ. Max. Units Test Conditions
—
1
1.5
1
Vin+= +260mV
Vin+= -260mV
Vin- = 0V
Vin- = 0V
—
—
sec
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