External Power Switch/ OVP Switch

External Power Switch/ OVP Switch

R5528Z

Handheld equipment such as smartphones and tablet PCs, charging via AC adapter or USB cable, wireless charging is also possible. Therefore selector switch is necessary. Further, if abnormal voltage adapter is connected, over voltage must be detected to prevent from destruction of the system. The switch is called an OVP switch.
The R5528 has both of the functions, switch-over and OVP.
The R5560 does not have the function of switch-over, however, OVP voltage can be set by user with divider resisters.
The circuit shown right is an example of input voltage switch-over circuit. In this example, when the AC Adapter or USB Charger input is in the appropriate range, PG pin becomes "L", then Wireless Charger side switch turns off by the OVLO pin, as a result, input power source can be switched over. In this example, the AC Adapter or USB Charger side becomes primary input.

External Power Switch/ OVP Switch Products Lineup

Product
Name
ON
Resistance
Supply
Current
Operating
Voltage
Range
OVP
Detect
Voltage
UVLO
Detect
Voltage
Output
Current
Internal
FET
Reverse
Current
Protection
at OFF state
EN Thermal
Shutdown
Soft Start Package Remarks Data
Sheet
(PDF)
Typ. Typ. Typ.
R5528Z 54mΩ 50µA 2.3V to
36.0V
6.8V
±3%
1.9V 3A Nch * L * * WLCSP-
9-P1
With PG (Power Good) output pin.
With Debounce time delay circuit.
Download

R5560Z
38mΩ 19µA 2.5A to
28.0V
6.8V*
±3%
2.05V 4.5A Nch - - * * WLCSP-
12-P2
*Adjustable OVLO threshold range.
Built-in Surge Clamp Circuit: 80V
With PG (Power Good) output pin.
With Debounce time delay circuit.
Download

*

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    Selection guide is available for download in PDF format.

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