RT9719 Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – Charging System Safety Device

RT9719
Charging System Safety Device
General Description
The RT9719 is an integrated circuit (IC) designed to replace
passive device in charging system with extra protection
function. It is optimized to protect low voltage system
from up to 28V high voltage input. The IC monitors the
input voltage to make sure all parameters are operating in
normal range. It also monitors its own temperature and
turn off the MOSFET when the chip temperature exceeds
140°C. When the input voltage exceeds the threshold,
the IC turns off the power MOSFET within 1us to remove
the power before any damage occurs. User can monitor
the adapter input voltage from CHRIN pin which has 50mA
current capability. The gate of the P-MOSFET will be
controlled by the external charging controller from
GATEDRV pin if all parameters are operating in normal
range.
The RT9719 is available in SOT-23-6 and WDFN-8L 2x2
tiny packages to achieve best solution for PCB space and
total BOM cost saving considerations.
Features
z No External Blocking Diode Requiring
z Overvoltage Turn Off Time of Less Than 1μs
z High Accuracy Protection Thresholds
z Over Temperature Protection
z High Immunity of False Triggering Under Transients
z Thermal Enhanced SOT-23-6 and 8-Lead WDFN
Packages
z RoHS Compliant and Halogen Free
Application
z Cellular Phones
z Digital Cameras
z PDAs and Smart Phones
z Portable Instruments
Pin Configurations
(TOP VIEW)
Ordering Information
RT9719
Package Type
E : SOT-23-6
QW : WDFN-8L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
OVP
Default : 6.25V
A : 7.20V
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.
ACIN 1
ACIN 2
ACIN 3
GND ⁴
8 ISENSE
7 ISENSE
6 CHRIN
9 _{5 GATEDRV}
WDFN-8L 2x2
6
5
4
2
3
SOT-23-6
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9719-01 April 2011
www.richtek.com
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