24IMS7-03-9 查看數據表（PDF） - Bel Fuse Inc.

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24IMS7-03-9

7-Watt DC-DC Converters

Bel Fuse Inc. 

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

Part Number Description

Input voltage range Vi

8.4 – 36 V .............................................. 20

14 – 36 V ............................................... 24

16.8 – 75 V ............................................ 40

36 – 75 V ............................................... 48

40 – 121 V ............................................. 70

60 – 150 V ........................................... 110

Series .............................................................. IMX7, IMS7

Output voltage of output 1 ...................... 03, 05, 12, 15, 24

Output voltage of output 2 ............................ 05, 12, 15, 24

40 IMX7 - 05 - 05 -8 Z G

Operating ambient temperature TA

–40 to 85 °C ............................................... -8

–40 to 71 °C ............................................... -9

Options:

Surface mount version1 ............................................ M

Open frame1 ..................................................................... Z

RoHS-compliant for all six substances ........ G

Obsolete option: C-pinout ............................................... C

1 Option M and Z exclude each other.

Note: The sequence of options must follow the order above.

Example: 40IMX7-05-05-8ZG: DC-DC converter, input voltage range 16.8 – 75 V, 2 outputs providing each 5 V, 700 mA,

temperature range – 40 to 85 °C, open frame, RoHS compliant for all six substances.

Functional Description

The IMX7/IMS7 Series DC-DC converters are feedback-

controlled flyback converters using current mode PWM (Pulse

Width Modulation).

In the case of single-output models, the output is directly

sensed and fed back to the primary control circuit via a pulse

transformer, resulting in tight regulation of the output voltage.

The R input is referenced to the secondary side and allows for

programming the output voltages in the range 75 to 105% of

Vo nom, using either an external resistor or an external voltage

source.

For double-output models, the output voltage is sensed by a

separate transformer winding close to the secondary and fed

Vi+ 1

03025a

11 Vo+

Vi+ 1

Trim 4

i3

PWM

Vi – 2

2 × 2200 pF

Fig. 2

Block diagram of double-output models

03042b

11 Vo1+

10 Vo1–

13 Vo2+

12 Vo2–

14 n.c.

PWM

i3

V i– 2

2 × 2200 pF

1500 V

n.c. 4

Fig. 1

Block diagram of single-output models

BCD20007-G Rev AF, 31-Jul-2015

10

Vo–

12

13 R

14 n.c.

back to the primary control circuit. Close magnetic coupling is

provided by the planar construction, ensuring very good

regulation, and allowing for flexible load distribution. The Trim

input of double-output models is referenced to the primary side,

and allows for programming the output voltages in the range of

100 to 105% of Vo nom by means of an external resistor, or within

75 to 100% of Vo nom, using an external voltage source.

Current limitation is provided by the primary circuit, thus limiting

the total output current (Io nom for the single- and the sum Io1 nom

+ Io2 nom for double-output models).

The inhibit input i allows remote control of the outputs; pin i

must be connected to Vi– to activate the converter.

MELCHER

The Power Partners.

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