CP494

SWITCHMODE Pulse Width Modulation Control Circuit

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU ,

TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525

Http: www.ceramate.com.tw

Fax:886-3-3521052

Page 6 of 11

Rev 1.0 Apr.19,2004

Figure 4. Open Loop Voltage Gain and

Phase versus Frequency

Figure 5. Percent Deadtime versus

Oscillator Frequency

Figure 6. Percent Duty Cycle versus

Deadtime Control Voltage

1.0

10

100

1.0 k

10 k

100 k

1.0 M

f, FREQUENCY (Hz)

0

20

40

60

80

100

120

140

160

180

φ

Figure 7. Emitter–Follower Configuration

Output Saturation Voltage versus

Emitter Current

500 k 1.0 k

10 k

100 k

500 k

0.001 mF

0

1.0

2.0

3.0

3.5

2

1

Figure 8. Common–Emitter Configuration

Output Saturation Voltage versus

Collector Current

0

100

200

300

400

0

100

200

300

400

Figure 9. Standby Supply Current

versus Supply Voltage

0

5.0

10

15

20

25

30

35

40

120

110

100

90

80

70

60

50

40

30

20

10

0

20

18

16

14

12

10

8.0

6.0

4.0

2.0

0

50

40

30

20

10

0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

10

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0