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WSH412

Description
Hall Effect Sensor IC with Thermal Lock Protection and Auto-restart Function
File Size165KB,8 Pages
ManufacturerWolfson Microelectronics plc (Cirrus Logic)
Websitehttp://www.wolfson.co.uk
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WSH412 Overview

Hall Effect Sensor IC with Thermal Lock Protection and Auto-restart Function

WSH412
Hall Effect Sensor IC with Thermal Lock Protection
and Auto-restart Function
產品特色:
工½電壓範圍由
2.8
伏特至
20
伏特。
內建霍爾感應器。
內建穩壓器½工½穩定於不同電壓源。
最大輸出電流
600mA。
切換時,有較½的電流變換率。
SOT25,SIP-4L
SIP-5L
包裝。
內建風扇½速產生器。
內建反向電壓保護二極體。
內建鎖定溫度保護裝½與自動啟動功½
功½描述:
WSH412
是一個整合霍爾感應器,互補性雙輸出以及½速產生器在一起之整
合型積體電路,它適用於½速量測、½½定½及直流無刷式馬達上。WSH412 其
內部包含溫度補償穩壓器、差動放大器、遲滯控制器、雙
open-collector
之輸出
NPN
電晶體可推動
600mA
以及一
open-collector
之½速產生器其可推動
10mA,
另外其內建反向電壓保護二極體可預防不小心之反向電壓之誤用。
WSH412
有另一重要之溫度特性優點,為其內建溫度相關之工½點,可½
WSH412
在不同之環境溫度下自動調整其工½點,並½其感應靈敏度隨溫度越高
而越靈敏,如此造成本產品½工½於環境溫度
20℃½100℃,且工½範圍由 2.8V
20V。此一重要特性徹底改善在高溫下IC感應不良之問題。另一鎖定溫度保護
與自動啟動功½, 在高溫
130°C時會把電源切除,以防止風扇因過熱而導致線圈
燒毀並且於降溫後自動啟動, 因此非常適合高½速的風扇½用。可以取代一般的
鎖定保護/自動啟動之功½。
腳½定義:
SOT-25
Name
P/I/O
VDD
P
Vss
P
FG
O
OUT2
O
OUT1
O
Pin#
1
2
3
4
5
Description
電源供應腳½
接地線
½速產生器
輸出腳½:2
輸出腳½:1
Winson reserves the right to make changes to improve reliability or manufacturability.
©育陞半導體股½有限公司,2005/8/12

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