MIC4043_02 datasheet(8/12 Pages) MICREL

Part #	MIC4043

Description	Low-Voltage Secondary-Side Shunt Regulator

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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MIC4043

Micrel

MIC4043

8

November 2000

Off-Line 2.5V/2A Power Supply

R13

10

Ω 1%

C11

1200

µF

10V

R14

200

Ω

1%

VOUT

+2.5V/2A

D4

12CTQ045

L2

5

µH

C12

220

µF

10V

U2b

2501

U3

249

Ω

1000pF

MIC4043

R10

72k

1%

R11

33k

1%

U1

MIC38HC43BN

VDD

VREF

GND

COMP

VOUT

RT/CT

FB

ISNS

2

1

4

3

8

5

7

6

R2

332k

1%

R3

332k

1%

D1

1N4448

R4

34

Ω

1%

C5

0.1

µF

50/

63V

D2

18V

C7

470pF

63V

C6

470pF

63V

Q1

IRFIBE30G

L1

R5

1.21k 1%

R6

1.21k

1%

BR1

DBR1

C4

47

µF

400V

U2a

2501

F1

85 to 264Vac

50/60Hz

Hot

Neutral

Return

T1

1

2

7

6

4

3

1A

Ground

R8

1.9

Ω

1/4W

1%

R9

470

Ω

1/2W

D3

UF4005

C9

100pF

1kV

R1

1k 1%

R7

14k 1%

C3

2200pF

400V

C2

2200pF

400V

C1

0.1

µF

250V

C10

0.1

µF

50/63V

80T

3T

20mH

C8

22

µF

25V

10T

FB

GND

SNK

IN

V

1.245V

R2

R1

1

TRIP =+









Figure 4. Off-Line 2.5V/2A Power Supply

Figure 4a. 2.5V/1A Bode Plot

(θ margin = 83°)

Figure 4b. 2.5V/2A Bode Plot

(θ margin = 83°)

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MIC4043 Datasheet(PDF) 8 Page - Micrel Semiconductor

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