ML4812IQ Datasheet ML4812IQX, ML4812CP, ML4812CQ | P13-P15

PRODUCT SPECIFICATION ML4812

REV. 1.0.4 5/31/01 13

Figure 12. Typical Application 200W Power Factor Correction Circuit

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

90 TO

260 VAC

AC IN

P

1

FUSE F1

5A 250V

L

N

C

1

1µF

630V

D

1

1N5406

D

2

1N5406

D

3

1N5406

R

GMOUT

27kΩ

D

10

1N5406

OPTIONAL

ENHANCEMENT

CKT.

R

12

1K

C

17

Q3 C

19

+

D

13

D

12

D

11

R

3

22kΩ

C

F

D

4

1N5406

R

2A

10kΩ

R

2B

3.9kΩ

R

5B

3.9kΩ

R

5A

10kΩ

R

1B

180kΩ

R

4B

180kΩ

R

PB

150kΩ

R

PA

360kΩ

R

4A

180kΩ

1

2

N

P

N

S

R

10

39kΩ

2W

R

SC

33kΩ

R

T

7.5kΩ

ML4812

IC

1

C

16

100µF

25V

+

D

9

D

8

Q2

KA7815

C

T

2nF

C15

P3*

C10

1µF

330µF

25V

V

CC

D

5

MUR860

OFF-LINE START-UP

AND BIAS SUPPLY

C

18

R

11

33kΩ

C

11

1nF

D

6

T

1

A

B

R

S

100

C

9

0.1µF

C

8

0.1µF

R

G

10

+

–

Q

1

FQP9N50

HEATSINK

C

H

6.8nF

R

7

150kΩ

1W

R

6

150kΩ

1W

C

3

6.8nF

1kV

C

4

1µF

630V

C

5

680µF

200V

C

6

680µF

200V

P

2

V

OUT

380 VDC

** SEE NOTES BELOW

NOTES:

1. ALL UNSPECIFIED DIODES ARE 1N4148.

2. ALL UNSPECIFIED RESISTORS ARE 1/4 WATT.

3. ALL UNSPECIFIED CAPACITOR VOLTAGE RATINGS ARE 50V.

4. ADJUST R

2A

AND R

5A

WITH CAUTION TO AVOID OVER VOLTAGE CONDITIONS.

Q

3

= PN2222

P3 IS USED AT INITAL TURN-ON TO

CHECK THE IC FOR PROPER OPERATION.

APPLY ≈ 16VDC.

FIXED RESISTORS CAN BE USED FOR THE SENSING

COMPONENTS. BELOW ARE 1% STANDARD

RESISTORS THAT WILL FORCE THE CORRECT

OUTPUT VOLTAGES R1A, R1B, R4A, R4B = 178kΩ 1%,

R2B = 4.75 1%, R5B = 4.53kΩ 1%.

USE JUMPERS INSTEAD OF R2A AND R5A (POTS).

FOR HIGHER POWER USE MORE V

CC

DECOUPLING.

2µF OR MORE BE REQUIRED AT 1KW LEVELS.

*

**

***

R

13

22kΩ

R

1A

180kΩ

L

1

***

+

–

+

ML4812 PRODUCT SPECIFICATION

14 REV. 1.0.4 5/31/01

Table 2. Component Values/Bill of Materials for Figure 12

Note:

1. All resistors 1/4W unless otherwise specified. Some reference designators are skipped (e.g. C2, C12, etc.) and do not appear

on the schematic. These designators were used in previous revisions of the board and are not used on this revision.

Additional information on key components is included in the attached appendix.

Reference Description

C1, C4 1µF, 630V Film (250VAC)

C3, C

H

6.8nF, 1KV Ceramic disk

C5, C6 680µF, 200V Electrolytic

C8, C9 0.1µF, 50V Ceramic

C10, C19 1µF, 50V Ceramic

C11 0.001µF, 50V Ceramic

C15 330µF, 25V Electrolytic

C16 100µF, 25V Electrolytic

C17 10µF, 25V Electrolytic

C

F

0.47µF, 50V Ceramic

C

T

0.002µF, 50V Ceramic

D1, D2, D3, D4, D10 1N5406 (Fairchild)

D5 MUR860 (Fairchild)

D6, D8, D9, D11, D12, D13 1N4148 (Fairchild)

F1 5A, 250V 3AG with clips

IC1 ML4812CP (Fairchild)

L1 2mH, 4A I

PEAK

(see note)

Q1 FQP9N50 (Fairchild)

Q2 KA7815 (Fairchild)

Q3 PN2222 (Fairchild)

R1A, R1B, R4A, R4B 180kΩ

R2A, R5A 10kΩ TRIMPOT BOURNS 3299 or equivalent

R2B, R5B 3.9kΩ

R3, R13 22kΩ

R6, R7, RPB 150kΩ

R10 39kΩ, 2W

R11 33kΩ

R12 1kΩ

RG 10Ω

RM 27kΩ

RPA, R15 360kΩ

RS 100kΩ

RSC 33kΩ

RT 7.5kΩ

T1 SPANG F41206-TC N

S

= 80, N

P

= 1 (see note)

PRODUCT SPECIFICATION ML4812

REV. 1.0.4 5/31/01 15

Figure 13. 1kW Input Power, Power Factor Correction Circuit

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

+

C12

1µF

630V

C10

680µF

250V

C11

680µF

250V

GND

V

OUT

C9

15µF

630V

C8

15µF

630V

D5 FFPF30U60S

R4

150K

1W

R5

150K

1W

–

FQA24N50

GND

1T

Q2

FQA24N50

Q1

T1

D4

80T

C14

1µF

***

RG1

3

RG2

3

C7

0.1µF

C4

0.1µF

RS

22Ω

C5

1nF

V

CC

CT 2.2nF

R3

33K

R722K

IC1

ML4812

RT

6.2K

RSC

51K

L1

566µH

RPA

360K

RPB

150K

R4A

360K

R4B

180K

R1B

180K

R1A

180K

CF

R5A

5K

R5B

3K

R2B

3K

R2A

5K

RM

27K

D1

1N5406

BRIDGE

RECTIFIER

C3

1µF

500V

C2

1µF

500V

C1

1µF

500V

FUSE F1

15A 250V

L

AC

IN

N

R1 R2

330K 22K R6

C13

10µF

GND

V

CC

Q3

D2

V

Z

3.5V

+

ENHANCEMENT CIRCUIT SEE TEXT

PN2222

**

C6

1µF

NOTES:

1. ALL UNSPECIFIED DIODES ARE 1N4148.

2. ALL UNSPECIFIED RESISTORS ARE 1/4 WATT.

3. ALL UNSPECIFIED CAPACITOR VOLTAGE RATINGS ARE 50V.

4. ADJUST R

2A

AND R

5A

WITH CAUTION TO AVOID OVER VOLTAGE CONDITIONS.

Q

3

= PN2222

AT INITIAL TURN-ON TO CHECK

THE IC FOR PROPER OPERATION,

APPLY ≈ 16VDC.

FIXED RESISTORS CAN BE USED FOR THE SENSING

COMPONENTS. BELOW ARE 1% STANDARD

RESISTORS THAT WILL FORCE THE CORRECT

OUTPUT VOLTAGES R1A, R1B, R4A, R4B = 178kΩ 1%,

R2B = 4.75Ω 1%, R5B = 4.53kΩ 1%.

USE JUMPERS INSTEAD OF R2A AND R5A (POTS).

FOR HIGHER POWER USE MORE V

CC

DECOUPLING.

*

**

***

ML4812IQ

ML4812IQ

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