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WP3891 Datasheet

Over-Voltage Protection IC

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DOCUMENT: I20010
REV LETTER: A
PAGE NO: 1 OF 7
DATE: 2016-03-24
PART NUMBER
WP3891
Over-Voltage
Protection IC
with OTG
CYG Wayon Circuit protection Co., Ltd.
No. 1001, Shiwan Qi Road, Pudong Area, Shanghai
Tel: 86-21- 50310888 50968308
E-mail: market@way-on.com
Http://www.way-on.com
Description
The WP3891 is OVP switch can disconnect the systems from its output pin in case wrong input operating conditions are
detected. The system is positive overvoltage protected up to 28V.
When input (OVLO) is set lower than 0.2V. The overvoltage protection threshold is 5.9V. The overvoltage protection
threshold can also be adjusted by external resistors when input (OVLO) is set higher than 0.3V.
The WP3891 provide Over Temperature Protection and also provide Reverse Current Blocking when the WP3891’s
switch is disabled.
The WP3891 provide OTG function allows OUT voltage to supply IN.
The device is packaged in advanced Full-Green compliant 2.1mmx1.6mm Wafer Level Chip Scale Packaging
(WLCSP).
Features
operating Range: 3V to 28V
Absolute maximum voltage of VIN: 29V
Low RDS(on): 60mΩ TYP at Vin=5V/0.3A
4.5A Maximum Continuous Current Capability
Overvoltage Lockout :OVLO=5.9V (TYP)
Debounce Time :20ms
OTG Enable function
Surge immunity to ±100V
CSP15 Package (1.6mm*2.1mm, ball pitch=0.4mm)
Compliance to IEC61000−4−2 (Level 4): bypassed with a 1.0μF or larger capacitor
15kV(Air) 8kV (Contact) ; ESD Ratings: HBM >2kV
Applications
Smartphones, Tablet PC
HDD, Storage and Solid State Memory Devices
Portable Media Devices, Laptop & MID
SLR Digital Cameras
GPS and Navigation Equipment
Industrial Handheld and Enterprise Equipment
Specifications are subject to change without notice
page 1 of 7




WAYON

WP3891 Datasheet Preview

WP3891 Datasheet

Over-Voltage Protection IC

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Pin Configuration
Pin Function
PIN
A1,A2,A3,A4,B1
A5
B2,C1,C2,C3,C4
B3
B4
B5
C5
NAME
OUT
OTG_EN
IN
ACOK
OVLO
GND
Figure1:pin map
DESCRIPTION
Overvoltage Protection Output when
OTG_EN=low and OTG output when OTG_EN=high. Bypass
OUT with a 1µF ceramic capacitor.
Enable Input for OTG Supply Operation or
Overvoltage Protection
Overvoltage Protection Input when OTG_EN=low
and OTG output when OTG_EN=high. If desired, bypass IN with
a 0.1µF ceramic capacitor as close to the device as possible.
1.8V Logic Output. It is driven high after input voltage is stable
between minimum VIN and VOVLO when OTG_EN = 0.
Connect a pulldown resistor from ACOK to ground.
Overvoltage Lockout Input. Connect OVLO to
GND to use internal OVLO threshold. Connect OVLO to a
resistor-divider for a different voltage threshold.
Open-Drain Flag Output. It is driven low after
input voltage is stable Between minimum VIN and VOVLO when
OTG_EN = 0. Connect a pullup resistor from it to the logic I/O
voltage of the host system.
Ground.
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable
above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition,
extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute
maximum ratings are stress ratings only.
Symbol
Parameters
VIN IN to GND
Specifications are subject to change without notice
Min.
-0.3
Max.
29
Unit
V
page 2 of 7


Part Number WP3891
Description Over-Voltage Protection IC
Maker WAYON
Total Page 7 Pages
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