IR2175SPBF International Rectifier, IR2175SPBF Datasheet - Page 4

• Manufacturer Part Number: IR2175SPBF
• Description: IC CURRENT SENSE 0.5% 8SOIC
• Manufacturer: International Rectifier

Specifications of IR2175SPBF

• 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: Lead free / RoHS Compliant
• Sensing Method: -
• Lead Free Status / Rohs Status: RoHS Compliant part

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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