UC3842AD datasheet(4/14 Pages) MOTOROLA

Part #	UC3842AD

Description	HIGH PERFORMANCE CURRENT MODE CONTROLLERS

Download	14 Pages

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Manufacturer	MOTOROLA [Motorola, Inc]

Direct Link	http://www.freescale.com

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4 / 14 page

UC3842A, 43A UC2842A, 43A

4

MOTOROLA ANALOG IC DEVICE DATA

Figure 1. Timing Resistor versus

Oscillator Frequency

Figure 2. Output Deadtime versus

Oscillator Frequency

Figure 3. Oscillator Discharge Current

versus Temperature

Figure 4. Maximum Output Duty Cycle

versus Timing Resistor

Figure 5. Error Amp Small Signal

Transient Response

Figure 6. Error Amp Large Signal

Transient Response

0.5

µs/DIV

VCC = 15 V

AV = –1.0

TA = 25°C

10 k

20 k

50 k

100 k

200 k

500 k

1.0 M

fOSC, OSCILLATOR FREQUENCY (Hz)

VCC = 15 V

TA = 25°C

10 k

20 k

50 k

100 k

200 k

500 k

1.0 M

fOSC, OSCILLATOR FREQUENCY (Hz)

VCC = 15 V

TA = 25°C

–55

–25

0

25

50

75

100

125

TA, AMBIENT TEMPERATURE (°C)

VCC = 15 V

VOSC = 2.0 V

RT, TIMING RESISTOR (Ω)

800

1.0 k

2.0 k

3.0 k

4.0 k

6.0 k

8.0 k

VCC = 15 V

CT = 3.3 nF

TA = 25°C

Idischg = 9.5 mA

Idischg = 7.2 mA

2.55 V

2.5 V

2.45 V

VCC = 15 V

AV = –1.0

TA = 25°C

0.1

µs/DIV

2.5 V

3.0 V

2.0 V

80

50

20

8.0

5.0

2.0

0.8

100

50

20

10

5.0

2.0

1.0

9.0

8.5

8.0

7.5

7.0

100

90

80

70

60

50

40

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