IR2175STR International Rectifier, IR2175STR Datasheet - Page 4

• Manufacturer Part Number: IR2175STR
• Description: IC CURRENT SENSE 0.5% 8SOIC
• Manufacturer: International Rectifier

Specifications of IR2175STR

• Function: Current Sense
• Accuracy: ±0.5%
• Voltage - Input: 9.5 ~ 20 V
• Current - Output: 20mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Sensing Method: -

IR2175
4
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.
Timing Waveforms
(S) & (PbF)
PO
PO
Figure 1 Output waveform
Carrier Frequency =
Duty=91%
130kHz
Duty=9%
Vin+= +260mV
Vin+= -260mV
Vs = 0V
Vs = 0V
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