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參數(shù)資料
| 型號： | R5421N112C-TR |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 電源管理 |
| 英文描述： | Li-lon BATTERY PROTECTOR |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 10/19頁 |
| 文件大?。?/td> | 147K |
| 代理商： | R5421N112C-TR |
Rev.1.11
- 10 -
G
VD3/Excess Current Detector, Short Circuit Protector
Both of the excess current detector and short circuit protector can work when both control FETs are in “ON” state.
When the V- pin voltage is going up to a value between the short protection voltage Vshort /V
DD
and excess current
threshold V
DET3
, the excess current detector operates and further soaring of V- pin voltage higher than Vshort makes the
short circuit protector enabled. This leads the external discharge control Nch MOS FET turns to “OFF” with the D
OUT
pin
being at “Low” level.
An output delay time for the excess current detector is internally fixed, 13ms typ. at V
DD
=3.0V.
A quick recovery of V- pin level from a value between Vshort and V
DET3
within the delay time keeps the discharge control
FET staying “High” state.
When the short circuit protector is enabled ,the D
OUT
would be Low and its delay time would be 5μs typ.
The V - pin has a built-in pulled down resistor ,typ.100k
, with connecting to the V
SS
pin.
After an excess current or short circuit protection is detected, removing a cause of excess current or external short circuit
makes an external discharge control FET to an “ON” state automatically with the V- pin level being down to the V
SS
level
through pulled down resistor built-in internally.
If V
DD
voltage would be higher than V
DET2
at a time when the excess current is detected the R5421NxxxC does not enter a
standby mode, or otherwise in case of lower V
DD
voltage than V
DET2
would lead the R5421NxxxC into a standby.
After detecting short circuit the R5421NxxxC will not enter a standby mode.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| R5421N151F | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Li-lon BATTERY PROTECTOR |
| R5421N151F-TR | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Li-lon BATTERY PROTECTOR |
| R5421N152F | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Li-lon BATTERY PROTECTOR |
| R5421N152F-TR | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Li-lon BATTERY PROTECTOR |
| R5422N111C | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Li-lon BATTERY PROTECTOR |
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