Datasheet > RT9718A

RT9718A

更新时间： 2024-11-05 21:06:51

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
10页	191K
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RT9718A 技术参数

Status：	Active	Vin (min) (V)：	4
Vin (max) (V)：	6.9	Vin_ovp (typ) (V)：	6.8
Delay Time (max) (us)：	1	Isd (typ) (uA)：	65
Ron (typ) (mOhm)：	200	Features：	Enable Input;OCP;OVP
Package Type：	WDFN2x2-8

RT9718A 数据手册

RT9718

Over Voltage Protection IC

General Description

Features

^Fully Integrated Protection Function

The RT9718 is an integrated circuit optimized to protect

low voltage system from abnormal high input voltage (up

to 30V). The IC monitors the input voltage, battery voltage

and the charging current to make sure all three parameters

are operated in normal range. When the input voltage

exceeds a certain OVP threshold voltage level, the IC will

turn off the power MOSFET within 1μs to remove the power

before any damage occurs. The RT9718 also can provide

a voltage output without the existence of battery.

^Programmable OCP

^Input OVP

^Battery OVP

^Withstand High Input Voltage Up to 30V

^Over Voltage Turn Off Time Less Than 1us

^High Accuracy Protection Thresholds

^Over Temperature Protection

^High Immunity of False Triggering Under Transients

^Warning Indication Output

The current in the power MOSFET is also limited to prevent

charging the battery with an excessive current. The current

limit can be programmed by an external resistor between

ILIM and GND. The OCP function also has a 4-bit binary

counter that accumulates during an OCP event. When the

total count reaches consecutive 16 times, the power

MOSFET is turned off permanently unless the input power

is recycled.

^Enable Input

^Thermal Enhanced WDFN Package

 RoHS Compliant and Halogen Free

Applications

 Cellular Phones

 Digital Cameras

 PDAs and Smart Phones

 Portable Instruments

The IC also monitors the battery voltage, Once the battery

voltage exceeds 4.35V and last for more then 180us

blinking time, the RT9718 will turn off the MOSFET. The

internal logic control will turn off the power MOSFET

permanently when the battery over-voltage event occurs

for consecutive 16 times.

Pin Configurations

(TOP VIEW)

VIN

GND

VOUT

ILIM

WRN

Ordering Information

RT9718

WDFN-8L 2x2

Package Type

QW : WDFN-8L 2x2 (W-Type)

Marking Information

Lead Plating System

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

G : Green (Halogen Free and Pb Free)

Z : ECO (Ecological Element with

Halogen Free and Pb free)

OVP

A : 6.80V

B : 5.85V

C : 6.25V

D : 7.20V

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.

DS9718-03 January 2019

www.richtek.com

12 3 4 5 6 7...10

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