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參數(shù)資料
| 型號： | DS2186 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Digital Transmission Interface |
| 英文描述： | DATACOM, DIGITAL SLIC, PDSO20 |
| 封裝： | 0.300 INCH, SOIC-20 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 115K |
| 代理商： | DS2186 |
MAX893L
1.2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
6
_______________________________________________________________________________________
Pin Description
Switch Output. P-channel MOSFET drain. Bypass OUT with a 0.1F capacitor to ground.
OUT
6, 7
Fault-Indicator Output. This open-drain output goes low when in current limit or when the die temperature
exceeds +165°C.
FAULT
8
Set Current-Limit Input. A resistor from SET to ground sets the current limit for the switch.
RSET = 1.34 103 / ILIMIT, where ILIMIT is the desired current limit in amperes.
SET
5
Ground
GND
4
PIN
Active-Low Switch On Input. A logic low turns the switch on.
ON
3
Input. P-channel MOSFET source. Bypass IN with a 1F capacitor to ground.
IN
1, 2
FUNCTION
NAME
Detailed Description
The MAX893L P-channel MOSFET power switch limits
output current to a programmed level. When the output
current is increased beyond the programmed current
limit, or 1.2A (IMAX), the current also increases through
the replica switch (IOUT / 1080) and through RSET
(Figure 1). The current-limit error amplifier compares
the voltage across RSET to the internal 1.24V reference,
and regulates the current to the programmed current
limit (ILIMIT).
This switch is not bidirectional; therefore, the input volt-
age must be higher than the output voltage.
Setting the Current Limit
The MAX893L features internal current-limiting circuitry
with a maximum programmable value (IMAX) of 1.2A.
For best performance, set the current limit (ILIMIT)
between 0.2A
≤ ILIMIT ≤ 1.2A. This current limit remains
in effect throughout the input supply-voltage range.
Program the current limit with a resistor (RSET) from
SET to ground (Figure 2) as follows:
ISET = ILIMIT / 1080
RSET = 1.24V / ISET = 1.34 103 / ILIMIT
where ILIMIT is the desired current limit.
Short-Circuit Protection
The MAX893L is a short-circuit protected switch. In the
event of an output short circuit or a current overload
condition, the current through the switch is limited by
the internal current-limiting error amplifier to 1.5 ILIMIT.
The short-circuit current is typically 1.8A for a pro-
grammed current limit of 1.2A. When the short-circuit
condition is removed, the replica error amplifier will set
the current limit back to ILIMIT.
For a high
VDS/t during an output short-circuit condi-
tion, the switch turns off and disconnects the input supply
from the output. The current-limiting amplifier then slow-
ly turns the switch on with the output current limited to
1.5 ILIMIT. When the short-circuit condition is removed,
the current limit is set back to ILIMIT. See Output Short-
Circuit (Fast-Loop Response) and Output Overload
(Slow-Loop Response) in the
Typical Operating
Characteristics.
MAX893L
P
RSET
SET
OUT
GND
1.24V
N
FAULT
ON
CURRENT-LIMIT
AMPLIFIER
REPLICA
AMPLIFIER
ON
HOT
IN
CONTROL
CIRCUITRY
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 |
|---|---|
| DS2186+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Transmit Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS2186N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CEPT/T1 Interface |
| DS2186S | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS2186S/T&R | 制造商:Maxim Integrated Products 功能描述:TRANSMIT LINE INTERFACE SOIC TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC TRANSMIT LINE INTERFC 20-SOIC |
| DS2186S/T&R | 功能描述:IC TRANSMIT LINE INTERFC 20-SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件 |
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