Datasheet > BD6524HFV_11

BD6524HFV_11

更新时间： 2022-10-15 20:27:42

品牌	Logo	应用领域
罗姆 - ROHM		开关便携式便携式设备
页数	文件大小	规格书
10页	274K
描述
Load Switch IC for Portable Equipment

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BD6524HFV_11 数据手册

Technical Note

BD6524HFV

●Functional description

1. Input / output

VIN pin and VOUT pin are connected to the drain and the source of N-MOS switch respectively. And the VIN pin is used

also as power source input to internal control circuit.

When EN input is set to High level and the switch is turned on, VIN pin and VOUT pin are connected by a 200mΩ switch.

In a normal condition, current flows from VIN to VOUT. If voltage of VOUT is higher than VIN, current flows from VOUT to

VIN, since the switch is bidirectional. There is not a parasitic diode between the drain and the source, it is possible to

prevent current from flowing reversely from VOUT pin to VIN pin when the switch is disabled.

2. Discharge circuit

When the switch between the VIN and the VOUT is OFF, the 200Ω(Typ.) discharge switch between VOUT and GND turns

on. By turning on this switch, electric charge at capacitive load is discharged.

3. Under voltage lockout (UVLO)

The UVLO circuit monitors the voltage of the VIN pin, when the EN input is active. UVLO circuit prevents the switch from

turning on until the V_INexceeds 2.2V(Typ.). If the VIN drops below 2.1V(Typ.) while the switch turns on, then UVLO shuts

off the switch.

While the switch between the VIN pin and VOUT pin is OFF owing to UVLO operations, the switch of the discharge circuit

turns on. However, when the voltage of VIN declines extremely, then the VOUT pin becomes Hi-Z.

2.1V(Typ.)

2.2V(Typ.)

VIN

VEN

VOUT

Discharge circuit

放電回路

OFF

Fig.31 Operation timing

●Typical application circuit

VIN

VOUT

GND

LOAD

0.1 1uF

～

Fig.32 Typical application circuit

www.rohm.com

2011.06 - Rev.C

7/9

1...4 5 678 9 10

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