MC33129 Просмотр технического описания (PDF) - Motorola => Freescale

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производитель

MC33129

High Performance Current Mode Controllers

Motorola => Freescale 

FreescalMeCS34e1m29iMcCo3n3d1u29ctor, Inc.

Figure 30. Isolated 3.0 W Flyback Regulator with Secondary Side Sensing

1/2

4N26

12

0.1

7

6

2.5V +

–

5

OSC

4

+

–

+

–

+

–

R

Q

S

1.25V

+

–

Vin = 12V

13

1N5821 L1

5/60mA

14

100

8

9

10

11

1

G

2

3

51

+ 1/2

+

4N26

100

470

0.1

D

TL431A

Return

MTP10N10M

S

MK

T1: Primary = 22T #18 AWG

Secondary = 22T #18 AWG

Lp = 50 µH

Core = Ferroxcube

L1:

2616PA100–3C8

Bobbin = Ferroxcube 2616F1D

Coilcraft Z7156, 15 µH

Test

Line Regulation

Load Regulation

Output Ripple

Efficiency

Conditions

Vin = 8.0 V to 12 V, Iout 600 mA

Vin = 12 V, Iout = 100 mA to 600 mA

Vin = 12 V, Iout = 600 mA

Vin = 12 V, Iout = 600 mA

Results

∆ = 1.0 mV

∆ = 8.0 mV

20 mVpp

81%

An economical method of achieving secondary sensing is to combine the TL431A with a 4N26 optocoupler.

MOTOROLA ANALOG IC DEVICEFDoArTMA ore Information On This Product,

15

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