MC34261 데이터 시트보기 (PDF) - ON Semiconductor

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MC34261

POWER FACTOR CONTROLLERS

ON Semiconductor 

MC34261, MC33261

Figure 16. 175 W Universal Input Power Factor Controller

85 to 265 RFI

Vac Filter

1 C6

D2 D4

D1 D3

1.3M

R7

0.01

12k 3

C2

R3

Delay

Current Sense

Comparator

6

Zero Current

Detector

+

1.2V

+ 1.6V

+ 36V

6.7V

100k

R8 1N4934

8

D6

+ 100

C5

5 22k

R5

T

2.5V

Reference

Timer R

RS

Latch

UVLO

+ 10V

16V

10

Drive

7

10

Output

10

R6

MUR460

D5

MTW

14N50E

VO

+

180

400V/

0.44A

C4

Q1

Multiplier

4

+ Error Amp

0.5mA

Vref

330 R4

1.0nF

C3

1

2

1.6M

R2

0.1

R9

10k

R1

0.68

C1

Power Factor Controller Test Data

AC Line Input

Current Harmonic Distortion (%)

Vrms

90

Pin

PF

187.5 −0.998

THD

2.0

2

0.10

3

0.98

5

0.90

7

0.78

VO(pp)

8.0

120 184.6 −0.997 1.8 0.09 1.3

1.3 0.93

8.0

138 183.6 −0.997 2.3 0.05 1.6

1.5

1.0

8.0

180 181.0 −0.995 4.3 0.16 2.5

2.0

1.2

8.0

240 179.3 −0.993 6.0 0.08 3.7

2.7

1.4

8.0

268 178.6 −0.992 6.7 0.16 2.8

3.7

1.7

8.0

This data was taken with the test set−up shown in Figure 17.

T = Coilcraft N2880−A

Primary: 78 turns of # 16 AWG

Secondary: 6 turns of # 18 AWG

Core: Coilcraft PT4215, EE 42−15

Gap: 0.104″ total for a primary inductance of 870 μH

Heatsink = AAVID Engineering Inc. 5903B

DC Output

VO

400.7

400.7

400.7

400.6

400.6

400.6

IO

0.436

0.436

0.436

0.436

0.436

0.436

PO

174.7

174.7

174.7

174.7

174.7

174.7

n(%)

93.2

94.6

95.2

95.6

97.4

97.8

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