IMX4 Series Data Sheet

4 Watt DC-DC Converters

BCD20006-G Rev AE, 16-Sep-2015

Page 3 of 12

MELCHER

The Power Partners.

Functional Description

The IMX4 Series converters are feedback-controlled flyback

converters

using

current

mode

PWM

(Pulse

Width

Modulation). The input is protected against transients by

means of a suppressor diode.

The output voltage is monitored by a separate transformer

winding close to the secondary windings and fed back to the

control circuit.

Current limitation is provided by the primary circuit, thus

The

close

magnetic

coupling

provided

by

the

planar

construction ensures very good regulation and allows for

flexible load distribution on dual-output models.

Fig. 2

Block diagram for dual-output models with standard

pinout.

PWM

Vi+

Vi–

Vo+

Vo–

Go

23

22

2

3

14

16

11

03045

PWM

Vi+

Vi–

Vo+

Vo–

Go

1

24

15

10

13

03047

11

Fig. 4

Block diagram for dual-output models with alternative

pinout (option K).

Fig. 3

Block diagram for single-output models with alternative

pinout (option K).

Fig. 1

Block diagram for single-output models with standard

pinout.

PWM

Vi+

Vi–

Vo+

Vo–

22

3

14

16

10

23

2

03044

PWM

Vi+

Vi–

Vo+

Vo–

1

24

13

12

2

03046

n.c.