RT9554A Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – Battery Output Current Sense Protection IC

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RT9554A
Battery Output Current Sense Protection IC
General Description
The RT9554A is designed for over-current detection. The
current sense amplifier amplifies the voltage across resistor
which is connected between CSP and CSN by 200. The
amplified voltage is compared with the voltage of BAT_REF
and check whether over-current happens or not. The
RT9554A also provides a comparator with two input pins,
AC_REAL and AC_REF for users. There is an output pin
FLAG as an indicator which is a N-MOSFET in open-drain
configuration. Users can connect one resistor between
the FLAG pin and supply voltage. Either over-current
condition occurs or the AC_REAL voltage is larger than
the AC_REF voltage, the FLAG is pulled low. The RT9554A
is a available in the WDFN-8L 2x2 package.
Ordering Information
RT9554A
Package Type
QW : WDFN-8L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
 RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
 Suitable for use in SnPb or Pb-free soldering processes.
Features
 Common Mode Input Range up to 24V
 VCC Operating Current : 200μA
 VCC Shutdown Current : 5μA (under S3/S4/S5)
 Programmable Over-Current Level
 FLAG Signal goes Low when OCP
 RoHS Compliant and Halogen Free
Applications
 Notebooks
Pin Configurations
(TOP VIEW)
VCC 1
EN 2
FLAG 3
AC_REF 4
8 CSP
7 CSN
6 BAT_REF
9 _{5 AC_REAL}
WDFN-8L 2x2
Marking Information
2CW
2C : Product Code
W : Date Code
Simplified Application Circuit
Input
R_SENSE
5V
0V
Output
1.05V
RT9554A
CSN
CSP
VCC
FLAG
3.3V
EN
BAT_REF
AC_REAL
AC_REF
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9554A-00 June 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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