Datasheet > BM2P074KF

BM2P074KF

更新时间： 2023-09-03 20:24:58

品牌	Logo	应用领域
罗姆 - ROHM		开关转换器
页数	文件大小	规格书
22页	1182K
描述
内置AC/DC用MOSFET的PWM方式DC/DC转换器BM2P074KF-G为所有存在插口的产品提供优良的系统。绝缘、非绝缘均可对应，可轻松设计各种形式的低功耗转换器。内置800V耐压启动电路，有助于实现低功耗。外接开关用电流检测电阻，可实现高自由度的电源设计。使用电流模式控制，进行逐周期电流限制，发挥带宽和瞬态响应的优异性能。开关频率固定为65kHz。轻负载时降低频率，实现高效率。内置跳频功能，有助于实现低EMI。内置800V耐压MOSFET，设计简便。

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BM2P074KF 数据手册

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BM2P074KF-G

●Description of Blocks

( 1 ) Start circuit (DRIAN : 4pin)

This IC built in Start circuit (tolerates 800V). It enables to be low standby mode electricity and high speed starting.

After starting, consumption power is idling current I_START3（typ=10uA） only.

Reference values of Starting time are shown in Figure6. When Cvcc=10uF it can start less than 0.1 sec.

FUSE

Diode

Bridge

85-265 Vac

DRAIN

SW1

VCC

Cvcc

VCCUVLO

Figure4. Block diagram of start circuit

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

Cvcc [uF]

Figure 5. Start current vs VCC voltage

* Start current flows from the DRAIN pin

Figure 6. Start time( reference value)

ex) Consumption power of start circuit only when the Vac=100V

PVH＝100V*√2*10uA=1.41mW

ex) Consumption power of start circuit only when the Vac=240V

PVH＝240V*√2*10uA=3.38mW

www.rohm.com

TSZ02201-0F1F0A200270-1-2

14.Mar.2017.Rev.002

6/19

TSZ22111・15・001

1...3 4 567 8 9...22

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