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MB3841PF-G-BND

更新时间： 2024-01-24 23:41:04

品牌	Logo	应用领域
富士通 - FUJITSU		电源电路开关电源管理电路光电二极管
页数	文件大小	规格书
17页	118K
描述
Power Management Switch IC

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技术参数
数据手册

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MB3841PF-G-BND 技术参数

生命周期：	Active	包装说明：	SOP,
Reach Compliance Code：	compliant	风险等级：	5.7
可调阈值：	YES	模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：	R-PDSO-G8	长度：	6.35 mm
信道数量：	1	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-20 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	2.25 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	OTHER	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	5.3 mm
Base Number Matches：	1

MB3841PF-G-BND 数据手册

MB3841

■ FUNCTIONAL DESCRIPTION

Current Limit Setting

The MB3841 provides highly accurate switching current setting, in the range 100 mA to 2 A ±20% (with limit

setting current at 2 A) by placing resistance between the CURRENT and GND pins.

Because the setting is dependent on the VIN voltage, it is important that the appropriate resistance be connected

to the VIN pin.

The following approximation formula (1) may be used to calculate the limit setting when V^IN= 5V.

For details, see “R^LIMvs. Limit Current Characteristics” on p. 9.

7450

....

I^SW=

[A]

(1)

(R^LIM[Ω])^1.1

When the switch limit level is exceeded, the switch turns off and then latch is set to protect the device.

At the same time the O.C output signal goes to “L” level to notify external systems.

When a “L” level signal is applied to the CONTROL switch, the latch is released, so that normal operation is

resumed at the next “H” level signal to the CONTROL switch.

Thermal Shutdown

The MB3841 has a thermal shutdown function which turns the switch off and sets the latch to protect the device

when junction temperature exceeds 125°C.

At the same time the O.C output signal goes to “L” level to notify external systems.

When a “L” level signal is applied to the CONTROL switch, the latch is released,so that normal operation is

resumed at the next “H” level signal to the CONTROL switch.

Slow Start

The on/off switching time of the MB3841 can be delayed by applying capacitance between the SS and GND

pins. Controlling the on time can soften surge current to the load side capacitance when power is turned on.

(t^ON, tOff are measured at 90% of VOUT.)

The following approximation formula (2) may be used to set on time when V^IN= 5 V.

For details, see “Css vs. tON (SS) Characteristics” on p. 9.

t^ON= 0.87 × 10^–3× CSS[pF] + 0.3

....

[ms]

(2)

DISCHARGE

The MB3841 has a DISCHARGE pin function that immediately discharges electric charge on the load side when

the switch is turned off.

1...8 9 101112 13 14...17

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