TSM108

12/13

12.2. Voltage and Current Control, Efficiency Performances using a PNP bipolar transistor

0

0.05

0.1

0.15

0.2

0.25

Iout (A)

0

1

2

3

4

5

6

7

0%

10%

20%

30%

40%

50%

60%

70%

PNP transistor Rbase = 220 L=150µH

Vout & duty cycle versus Iout

Vin=12V, Vout=6V, Iout=200mA

0

0.05

0.1

0.15

0.2

0.25

Iout (A)

0%

10%

20%

30%

40%

50%

60%

70%

80%

0%

10%

20%

30%

40%

50%

60%

70%

80%

PNP transistor Rbase = 220 L=150µH

Efficiency & duty cycle versus Iout

Vin=12V, Vout=6V, Iout=200mA

5

1015

20253035

Vin (V)

6.025

6.03

6.035

6.04

6.045

6.05

60%

65%

70%

75%

80%

85%

PNP transistor Rbase =220 L=150µH

Vout & Efficiency versus Vin

Vout = 6V, Iout = 200mA