Datasheet > QSB400

QSB400

更新时间： 2022-02-26 12:00:06

品牌	Logo	应用领域
XPPOWER		/
页数	文件大小	规格书
4页	141K
描述
Industry Standard Full Brick Package

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数据手册

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QSB400 数据手册

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Application Notes

Parallel Operation

DC OK Signal

Normal and abnormal operation of the converter can be monitored by

using the DC OK signal. Output of this signal monitor is located at the

secondary side and is an open collector output with the -Sense pin as

the ground reference. The internal aux power supply or an external DC

supply can be used as a pull up voltage.

The QSB400 series are designed for parallel operation. When

paralleled, the load current can be equally shared between the

modules by connecting the Parallel pins together.

There are two different parallel operations for QSB400 series, one is

parallel operation when load can’t be supplied by only one power unit;

the other is for N+1 redundant operation.

AUX

(a) Parallel Operation

DCOK

-V

-S

PARALLEL

Internal AUX

External DC supply

-V

-S

This signal is LOW when the converter is operating normally and HIGH

when the converter is disabled or when the converter is operating

abnormally.

PARALLEL

Remote ON/OFF Control

(b) Parallel Operation with adjustable output

The converter’s output ON/OFF function can be controlled from the

input side or the output side.

Output voltage turns on when current flows through ON/OFF pins by

opening or closing the switch. The maximum current through the

ON/OFF pin is 10mA, and is determined by current limit resistor R.

-V

-S

TRIM

PARALLEL

(A) Turning output ON and OFF from the input side, recommended R

value is 30K (0.5W) for 48Vin and 15K (0.25W) for 24Vin.

-V

-S

TRIM

PARALLEL

+Vi

+Vin

-Vin

Input

-Vi

1kΩ

-V

-S

+ON/OFF

I(ON/OFF)

-ON/OFF

-V

-S

(B) Turning output ON and OFF from the output side, recommended R

value is 5.1k (0.1W).

(d) N+1 redundant connection adjustable output voltage

AUX

Output

-V

-S

TRIM

-S

PARALLEL

1kΩ

+ON/OFF

-V

-S

TRIM

I(ON/OFF)

-ON/OFF

PARALLEL

1 234

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