UC3844D datasheet(4/14 Pages) ONSEMI

部品番号	UC3844D

部品情報	HIGH PERFORMANCE CURRENT MODE CONTROLLERS

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UC3844, 45 UC2844, 45

4

MOTOROLA ANALOG IC DEVICE DATA

Figure 1. Timing Resistor versus

Oscillator Frequency

Figure 2. Output Deadtime versus

Oscillator Frequency

Figure 3. Error Amp Small Signal

Transient Response

Figure 4. Error Amp Large Signal

Transient Response

0.5

µs/DIV

VCC = 15 V

AV = –1.0

TA = 25°C

VCC = 15 V

AV = –1.0

TA = 25°C

1.0

µs/DIV

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)

Figure 5. Error Amp Open Loop Gain and

Phase versus Frequency

Figure 6. Current Sense Input Threshold

versus Error Amp Output Voltage

NOTE: Output switches

at one–half the oscillator

frequency.

CT = 10 nF

5.0 nF

2.0 nF

1.0 nF

100 pF

500 pF

200 pF

2.55 V

2.5 V

2.45 V

2.5 V

3.0 V

2.0 V

100

50

20

10

5.0

2.0

1.0

75

70

65

60

55

50

–20

10 M

10

f, FREQUENCY (Hz)

Gain

Phase

VCC = 15 V

VO = 2.0 V to 4.0 V

RL = 100 K

TA = 25°C

0

30

60

90

120

150

180

100

1.0 k

10 k

100 k

1.0 M

0

20

40

60

80

100

0

VO, ERROR AMP OUTPUT VOLTAGE (V)

0

0.2

0.4

0.6

0.8

1.0

1.2

2.0

4.0

6.0

8.0

VCC = 15 V

TA = 25°C

TA = –55°C

TA = 125°C

同様の部品番号 - UC3844D

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Motorola, Inc	UC3844D	376Kb / 14P	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
STMicroelectronics	UC3844D	96Kb / 11P	CURRENTMODE PWM CONTROLLER
Fairchild Semiconductor	UC3844D	127Kb / 12P	SMPS Controller
Texas Instruments	UC3844D	937Kb / 3P	[Old version datasheet] Current Mode PWM Controller
ON Semiconductor	UC3844D	617Kb / 16P	High Performance Current Mode Controllers July, 2006 ??Rev. 7

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