Datasheet > BD7J201EFJ-LB

BD7J201EFJ-LB

更新时间： 2023-09-03 20:25:15

品牌	Logo	应用领域
罗姆 - ROHM		变压器光电转换器
页数	文件大小	规格书
39页	1397K
描述
本产品是能够保证向工业设备市场长期供应的产品，是不需要光耦的隔离型反激式转换器。使用本产品，将不再需要以往应用中为了获得稳定的输出电压而需要的由光电耦合器或变压器辅助绕组组成的反馈电路。此外，通过采用ROHM自有的自适应导通时间控制技术，也不再需要外置相位补偿器件，从而可以使隔离式电源设计所需的元器件数量显著减少，并且能够实现小型化和更高可靠性。

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BD7J201EFJ-LB 数据手册

BD7J201HFN-LB (Under Development) BD7J201EFJ-LB

Description of Blocks – continued

ADAPTIVE ON TIME CONTROLLER

This block is corresponded to the original adapter type technology that controls on time.

Stable load current:

Operates in the PWM control and fix the on time.

Fluctuating load current:

Operates in the on time control and realizes a high-speed load response by

fluctuates the switching frequency.

Light load:

Decrease the switching frequency and realizes a high efficiency.

When the load current fluctuates, the frequency becomes high. The IC raises the average of primary current by

shortening the off time and raises the secondary current.

Output voltage

Primary coil current

SW pin voltage

High

Frequency

Stabilize gradually

Stable operation

Switching Frequency

Figure 4. Transient Response Timing Chart

DRIVER

This block drives the switching MOSFET.

LOAD COMPENSATION

This block compensates the fluctuation of output voltage caused by the fluctuation of V_Fcharacteristic in the secondary

output diode corresponded to load current. This block monitors the current flowed to the switching MOSFET and pulls

the current corresponded to the quantity of compensation determined by the external resistor and capacitor at the

L_COMP pin and time constant from the REF pin. The decrease of the REF pin voltage by the drop of feedback current

flowing in the external resistor at the REF pin rises the output voltage and it is compensated.

www.rohm.com

TSZ22111 • 15 • 001

TSZ02201-0F1F0BZ00020-1-2

08.Jul.2021 Rev.001

5/36

1 2 3 456 7 8...39

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与BD7J201EFJ-LB相关器件

型号	品牌	获取价格	描述	数据表
BD7J201HFN-LB	ROHM	获取价格	本产品是能够保证向工业设备市场长期供应的产品，是不需要光耦的隔离型反激式转换器。使用本产品
BD7LS00G-C	ROHM	获取价格	BD7LS00G-C是适用于车载应用的Single 2-input NAND gate。可
BD7LS02G-C	ROHM	获取价格	BD7LS02G-C是适用于车载应用的Single 2-input NOR gate。可保
BD7LS04G-C	ROHM	获取价格	BD7LS04G-C是适用于车载应用的Single　Inverter。可保证在1.65V到
BD7LS07G-C	ROHM	获取价格	BD7LS07G-C是适用于车载应用的Single Buffer with Open-dr
BD7LS08G-C	ROHM	获取价格	BD7LS08G-C是适用于车载应用的Single 2-input AND gate。可保
BD7LS125G-C	ROHM	获取价格	BD7LS125G-C是适用于车载应用的Single 3-state Buffer。可保证
BD7LS14G-C	ROHM	获取价格	BD7LS14G-C是适用于车载应用的Single Schmitt Trigger Inv
BD7LS17G-C	ROHM	获取价格	BD7LS17G-C是适用于车载应用的Single Schmitt Trigger Buf
BD7LS32G-C	ROHM	获取价格	BD7LS32G-C是适用于车载应用的Single 2-input OR gate。可保证

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