TL494 datasheet(6/12 Pages) ONSEMI | SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

6 page

TL494, NCV494

http://onsemi.com

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

100

1.0 k

10 k

100 k

1.0 M

f, FREQUENCY (Hz)

AVOL

100

120

140

160

180

VCC = 15 V

DVO = 3.0 V

RL = 2.0 kW

Figure 7. Emitter−Follower Configuration

Output Saturation Voltage versus

Emitter Current

500 k 1.0 k

10 k

100 k

500 k

fosc, OSCILLATOR FREQUENCY (Hz)

CT = 0.001 mF

0.001

1.0

2.0

3.0

3.5

VDT, DEADTIME CONTROL VOLTAGE (IV)

VCC = 15 V

VOC = Vref

1.CT = 0.01 mF

2. RT = 10 kW

2.CT = 0.001 mF

2. RT = 30 kW

Figure 8. Common−Emitter Configuration

Output Saturation Voltage versus

Collector Current

100

200

300

400

IE, EMITTER CURRENT (mA)

100

200

300

400

IC, COLLECTOR CURRENT (mA)

Figure 9. Standby Supply Current

versus Supply Voltage

5.0

VCC, SUPPLY VOLTAGE (V)

120

110

100

8.0

6.0

4.0

2.0

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

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

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