MC34261 MC33261

9

MOTOROLA ANALOG IC DEVICE DATA

+

+

1.6V

Timer R

180

C4

100

C5

10V

MTW

14N50E

Q1

1.3M

R7

Figure 16. 175 W Universal Input Power Factor Controller

+

+

+

+

+

RFI

Filter

R6

R4

C6

D4

D3

D2

D1

0.01

C2

330

1.0nF

C3

0.5mA

6.7V

Zero Current

Detector

VO

T

UVLO

Vref

Error Amp

Current Sense

Comparator

RS

Latch

1.2V

36V

2.5V

Reference

16V

10

Drive

Output

10

Multiplier

Delay

85 to 265

Vac

1

12k

R3

22k

R5

10

100k

R8

1N4934

D6

10k

R1

1.6M

R2

0.1

R9

4

7

8

5

3

6

0.68

C1

2

1

MUR460

D5

400V/0.44A

Power Factor Controller Test Data

AC Line Input

DC Output

Current Harmonic Distortion (%)

Vrms

Pin

PF

THD

235

7

VO(pp)

VO

IO

PO

n(%)

90

187.5

–0.998

2.0

0.10

0.98

0.90

0.78

8.0

400.7

0.436

174.7

93.2

120

184.6

–0.997

1.8

0.09

1.3

1.3

0.93

8.0

400.7

0.436

174.7

94.6

138

183.6

–0.997

2.3

0.05

1.6

1.5

1.0

8.0

400.7

0.436

174.7

95.2

180

181.0

–0.995

4.3

0.16

2.5

2.0

1.2

8.0

400.6

0.436

174.7

95.6

240

179.3

–0.993

6.0

0.08

3.7

2.7

1.4

8.0

400.6

0.436

174.7

97.4

268

178.6

–0.992

6.7

0.16

2.8

3.7

1.7

8.0

400.6

0.436

174.7

97.8

= 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

= AAVID Engineering Inc. 5903B

T

Heatsink

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