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參數(shù)資料
| 型號： | MAX4945ELA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CTLR OVP W/FET 5.80V 8-UDFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 過壓保護控制器 |
| 應用： | 手機，數(shù)碼相機，媒體播放器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-WFDFN |
| 供應商設(shè)備封裝： | 8-uDFN（2x2） |
| 包裝： | 帶卷 (TR) |
Detailed Description
The MAX4943–MAX4946/MAX4949 overvoltage-protec-
tion devices feature a low RON internal FET and protect
low-voltage systems against voltage faults up to +28V. If
the input voltage exceeds the overvoltage threshold, the
internal MOSFET is turned off to prevent damage to the
protected components. These devices also drive an
optional external pFET to protect down to -28V. If the
adapter voltage drops below ground, the pFET turns off
to prevent damage to the protected components due to
negative voltage exposure. The internal charge pump’s
15ms (typ) debounce time prevents false turn-on of the
internal switch during startup. An open-drain, active-low
logic output is available to signal that a successful
power-up has occurred.
MAX4943–MAX4946/MAX4944L/MAX4945A/MAX4945L/MAX4949
Overvoltage-Protection Controllers with
Internal FET
_______________________________________________________________________________________
5
Pin Description
PIN
NAME
FUNCTION
1, 2
IN
Voltage Input. IN powers the charge pump required to turn on the internal switch. When the correct
adapter is plugged in, a 15ms (typ) debouncer prevents false turn-on of the internal switch. Bypass
IN to GND with a 1F ceramic capacitor as close as possible to the device to enable ±15kV (HBM)
ESD protection on IN.
3
GP
pFET Gate-Drive Output. GP pulls the external pFET gate down when the input is above ground.
4
ACOK
Active-Low Open-Drain Adapter-Voltage Indicator Output.
ACOK is driven low after the adapter
voltage is stable between VUVLO and VOVLO for 30ms (typ). Connect a pullup resistor from ACOK to
the logic I/O voltage of the host system.
5
GND
Ground
6, 7, 8
OUT
Output Voltage. Output of internal switch. Short all pins together for proper operation.
GP
OUT
VOVLO
15ms (typ)
DEBOUNCE
TIMER AND
RETRY TIME
30ms (typ)
TIMER
OSCILLATOR
CHARGE
PUMP
OVERCURRENT
OR
THERMAL
FAULTS
IN
GND
CHARGE-PUMP
ENABLED
VUVLO
ACOK
MAX4943–MAX4946/MAX4944L/
MAX4945L/MAX4949
+
-
+
-
RESET
Figure 1. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4945LELA+T | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4946ELA+T | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4947EBA+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX4947EBA+T | 功能描述:模擬開關(guān) IC Hex SPDT Data Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX4947ERA+T | 制造商:Maxim Integrated Products 功能描述:HEX SPDT DATA SWITCH - Tape and Reel |
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