Datasheet > SGM790B

SGM790B

更新时间： 2024-09-22 17:01:51

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
11页	440K
描述
Dual Load Detector with 300nA Operating Current

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中文翻译

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数据手册

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SGM790B 数据手册

SGM790A/SGM790B/SGM790C

Dual Load Detectors

with 300nA Operating Current

GENERAL DESCRIPTION

FEATURES

The SGM790A, SGM790B and SGM790C are low

current, dual load sensing devices that can detect

connection or removal of the loads on a supply bus. By

using short pulse injections into the input capacitance

and measuring the voltage change, load existence is

periodically checked.

● 2.5V to 5.5V Operating Voltage Range

● Very Low Operating Current: 300nA (TYP)

● Two Independent Detection Channels

● 1.3s Wake-Up Output Signal (SGM790A/SGM790C)

● 160ms Detection Period

● Available in a Green UTDFN-1.2×1.2-6L Package

The SGM790A and SGM790C provide wake-up output

pins, denoted by WKP and nWKP respectively. The logic

levels of the SGM790C are completely the opposite of

the SGM790A. When a load attachment or detachment

is sensed, a pulse (1.3s, TYP) is generated on WKP

(nWKP) pin to report the status change or to awaken the

host. The bidirectional WKP (nWKP) pin is also used as

a selection input pin to choose either SNS1 or SNS2

channel. The detection status of SNSx channel is

reported on the FLG output pin during the 1.3s window.

In the SGM790B, the most recent detection status of

SNSx channel is reported on the corresponding FLGx

channel output.

APPLICATIONS

Power Bank

Powered Storage Box

Low Standby Power Cord Supply

These devices are available in a Green UTDFN-1.2×

1.2-6L package, and can operate in the ambient

temperature range of -40℃ to +85℃.

TYPICAL APPLICATION

V_BAT

SGM66099

Low I_Q5V Boost

SGM66099

Low I_Q5V Boost

Power Supply Circuit

100nF ~ 1μF

V_BAT

GPIO

IO1

Status Reading

Wake-Up

Status Reading

ESD2

MCU

IO2

Status Reading

Wake-Up

ESD1

100nF ~ 1μF

SGM790A/C

SGM790B

Figure 1. Typical Application Circuits

SG Micro Corp

www.sg-micro.com

DECEMBER2020–REV. A

12 3 4 5 6 7...11

中文翻译

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