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ADP5080 efficiency test diagram from datasheet

Question asked by Kencheng on Apr 9, 2018
Latest reply on Apr 19, 2018 by takahiko.kadokawa

Hi ADI Expert 

I have a customer who tested ADP5080 EVB eff but the test result of Ch.1 is mismatched from the eff diagram from datasheet, below are the test condition I have checked with him

1. Customer used Auto PSM mode for test

2.  When he tested the Ch1 eff, all of the other channels were disabled

the below table is the test result from the customer

 

2MHZ

1.5MHZ

1MHZ

750KHZ

Vin(Vbat)

Vout

Iin(mA)

Iout(mA)

eff=(Pout/Pin)

Vin(Vbat)

Vout

Iin(mA)

Iout(mA)

eff=(Pout/Pin)

Vin(Vbat)

Vout

Iin(mA)

Iout(mA)

eff=(Pout/Pin)

Vin(Vbat)

Vout

Iin(mA)

Iout(mA)

eff=(Pout/Pin)

7.20

1.1

24.55

100

62.23%

7.20

1.1

22.95

100

66.57%

7.20

1.1

21.83

100

69.99%

7.20

1.1

21.51

100

71.03%

7.20

1.094

99.2

500

76.58%

7.20

1.094

95.9

500

79.22%

7.20

1.093

94.6

500

80.24%

7.20

1.092

96.3

500

78.75%

7.20

1.086

193.1

1000

78.11%

7.20

1.087

187.5

1000

80.52%

7.20

1.09

183.3

1000

82.59%

7.20

1.086

182.2

1000

82.78%

 

and my question is that I checked the eff diagram from datasheet but no test frequency condition was noted,

As the result, May I know what Fsw was for the ch1 eff diagram from ADP5080 datasheet?

 

 

 

thank you

Ken

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