Datasheet > BQ2540-9P

BQ2540-9P

更新时间： 2024-02-15 20:00:26

品牌	Logo	应用领域
BEL		/
页数	文件大小	规格书
26页	2759K
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DC-DC Regulated Power Supply Module,

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BQ2540-9P 技术参数

生命周期：	Not Recommended	包装说明：	,
Reach Compliance Code：	compliant	风险等级：	5.74
模拟集成电路 - 其他类型：	DC-DC REGULATED POWER SUPPLY MODULE	Base Number Matches：	1

BQ2540-9P 数据手册

Q Series Data Sheet

66 – 132 Watt DC-DC Converters

The current limitation is located at the primary side, thus

limiting the total output current in overload conditions. This

allows flexible loading of each output for unsymmetrical loads

in the range 10 to 90% of the total output power. In applications

with large dynamic load changes, we recommend connecting

such a load to output 1. If output 2 is not used, it should be

connected parallel to output 1. Both outputs can either be

series- or parallel-connected (see Electrical Output Data).

Functional Description

The converters are designed as forward converters using

primary and secondary control circuits in SMD technology. The

switching frequency is approximately 200 kHz under nominal

operating conditions. The built-in high-efficient input filter

together with a small input capacitance generate very low

inrush currents of short duration. After transformer isolation

and rectification, the output filter reduces ripple and noise to a

minimum without compromising the dynamic ability. The

output voltage is fed to the secondary control circuit via

separate sense lines. The resultant error signal is sent to the

primary control circuit via a signal transformer.

In normal operation, the internal control circuits are powered

by a third winding of the main choke (except 48Q models).

Start-up is ensured from the input voltage by a linear regulator.

Note: When the output voltage is much lower then the nominal

value, this linear regulator is activated, generating considerable

power losses.

Double-output models have the voltage regulation of output 2

relying on the close magnetic coupling of the transformer and

the output inductor together with the circuits' symmetry.

03111a

Out OK+

Out OK–

Output

control

Primary

control circuit

Output

monitor

16 R³

S+¹

Vi+ 30

Vo+

Input

filter

Output

filter

Vi–

Vo–

S–¹

Fuse

C_y

Isolation

¹Leading pins

²Potentiometer for option P ³Do not connect for models xQ1101 or with option P ⁴Do not connect

Fig. 6

Block diagram of a single-output converter

03112a

Out OK+

Out OK–

Output

control

Primary

control circuit

Output

monitor V_o2

R³

Vo2+

Output

filter

Vi+ 30

10 Vo2–

Input

filter

S+¹

Vo1+

Vi–

Fuse

Output

filter

C_y

Vo1–

S–¹

C_y

Isolation

¹Leading pins

²Potentiometer for option P ³Do not connect for models with option P ⁴Do not connect

Fig. 7

Block diagram of a double-output converter

BCD20011-G Rev AG, 12-Mar-2012

Page 5 of 26

www.power-one.com

1 2 3 456 7 8...26

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