UC3842BVD1R2G(2013) Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

UC3842BVD1R2G
(Rev.:2013)

High Performance Current Mode Controllers

ON Semiconductor 

UC3842B, UC3843B, UC2842B, UC2843B

4.7W

MDA

202

115 Vac

+ 250

MBR1635

L1

4.7k

T1

3300

5.0V/4.0A

+

+

2200

1000

56k

pF

5.0V RTN

MUR110

1N4935 1N4935

12V/0.3A

+ L2 +

7(12)

+ 68

+

1000

10

100

47

±12V RTN

0.01

8(14)

10k

4700pF 4(7)

18k

2(3)

100

4.7k pF

150k

1(1)

5.0V Ref

R

+

Bias

-

R

+

7(11)

-

Osc

+

6(10)

S

Q

EA

R

5(8)

Comp/Latch

3(5)

5(9)

Figure 35. 27 W Off−Line Flyback Regulator

1N4937

22

MTP

1N5819

4N50

1.0k

0.5

470pF

1000 +

MUR110

680pF

10 +

L3

-12V/0.3A

2.7k

1N4937

L1 - 15 mH at 5.0 A, Coilcraft Z7156

L2, L3 - 25 mH at 5.0 A, Coilcraft Z7157

T1 - Primary: 45 Turns #26 AWG

Secondary ±12 V: 9 Turns #30 AWG

(2 Strands) Bifiliar Wound

Secondary 5.0 V: 4 Turns (six strands)

#26 Hexfiliar Wound

Secondary Feedback: 10 Turns

#30 AWG (2 strands) Bifiliar Wound

Core: Ferroxcube EC35-3C8

Bobbin: Ferroxcube EC35PCB1

Gap: ≈ 0.10" for a primary inductance

of 1.0 mH

Test

Conditions

Results

Line Regulation: 5.0 V Vin = 95 to 130 Vac

±12 V

D = 50 mV or ± 0.5%

D = 24 mV or ± 0.1%

Load Regulation: 5.0 V

±12 V

Output Ripple: 5.0 V

±12 V

Vin = 115 Vac,

Iout = 1.0 A to 4.0 A

Vin = 115 Vac,

Iout = 100 mA to 300 mA

D = 300 mV or ± 3.0%

D = 60 mV or ± 0.25%

Vin = 115 Vac

40 mVpp

80 mVpp

Efficiency

Vin = 115 Vac

All outputs are at nominal load currents, unless otherwise noted

70%

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