IRSM836-044MA

13

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© 2012 International Rectifier

January 21, 2013

Current Capability in a Typical Application

Figure 6 shows the current capability for this module at specified conditions. The current capability of the

module is affected by application conditions including the PCB layout, ambient temperature, maximum PCB

temperature, modulation scheme, PCB copper thickness and so on. The curves below were obtained from

measurements carried out on the IRMCS1471_R4 reference design board which includes the IRSM836-044MA

and IR’s IRMCK171 digital control IC.

0

100

200

300

400

500

600

700

800

900

1000

6

8

10

12

14

16

18

20

Carrier Frequency (kHz)

150V, ∆Tca = 70

1oz, 3P

2oz, 3P

1oz, 2P

2oz, 2P

0

100

200

300

400

500

600

700

800

6

8

10

12

14

16

18

20

Carrier Frequency (kHz)

150V, ∆Tca = 40

1oz, 3P

2oz, 3P

1oz, 2P

2oz, 2P

Figure 6: Maximum Sinusoidal Phase Current vs. PWM Switching Frequency

Sinusoidal Modulation, V