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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)： | 7/8頁 |
| 文件大小： | 115K |
| 代理商： | DS2186 |
MAX893L
1.2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
_______________________________________________________________________________________
7
Thermal Shutdown
The MAX893L features thermal shutdown. The switch
turns off when the junction temperature exceeds
+165°C. Once the device cools by 10°C, the switch
turns back on. If the fault condition is not removed, the
switch will cycle on and off, resulting in a pulsed out-
put.
Fault Indicator
The MAX893L provides a fault output (FAULT). This
open-drain output goes low when in current limit or
when the die temperature exceeds +165°C. A 100k
pull-up resistor from FAULT to IN provides a logic-
control signal.
Fault Blanking
During start-up in USB applications, the MAX893L
charges the relatively large USB capacitance. This may
activate an unwanted fault signal if the charging current
exceeds the programmed current limit. To “blank out”
this start-up fault signal, add a simple lowpass RC
delay circuit as shown in Figure 3. This circuit provides
a 10ms delay.
Applications Information
Input Capacitor
To limit the input voltage drop during momentary output
short-circuit conditions, connect a capacitor no more
than 5mm from IN to GND. A 1F ceramic capacitor will
be adequate for most applications; however, higher
capacitor values will further reduce the voltage drop at
the input.
Output Capacitor
Connect a 0.1F capacitor from OUT to GND to prevent
inductive parasitics from pulling OUT negative during
turn-off.
Layout and Thermal-Dissipation
Considerations
To take full advantage of the switch-response time to
output short-circuit conditions, it is very important to
keep all traces as short as possible to reduce the effect
of undesirable parasitic inductance. Place input and
output capacitors as close to the device as possible
(no more than 5mm).
Under normal operating conditions, the package can
dissipate and channel heat away. Calculate the maxi-
mum power as follows:
P = (ILIMIT)2 RON
where RON is the on-resistance of the switch.
When the output is short circuited, the voltage drop
across the switch equals the input supply. Hence, the
power dissipated across the switch increases, as does
the die temperature. If the fault condition is not
removed, the thermal-shutdown protection circuitry
turns the switch off until the die temperature falls by
10°C. A ground plane in contact with the device will
help dissipate additional heat.
Chip Information
TRANSISTOR COUNT: 340
MAX893L
SET
RSET
GND
Figure 2. Setting the Current Limit
MAX893L
C
0.1
F
BLANKED
SIGNAL
TO P
R
100k
IN
VOUT
OUT
INPUT VOLTAGE
+5V
ON/OFF
GND
RSET
FAULT
SET
Figure 3. Fault-Blanking Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2187S | DATACOM, PCM TRANSCEIVER, PDSO20 |
| DS2188N | DATACOM, PCM JITTER ATTENUATOR, PDIP16 |
| DS2188SN | DATACOM, PCM JITTER ATTENUATOR, PDSO16 |
| DS2188 | DATACOM, PCM JITTER ATTENUATOR, PDIP16 |
| DS2188S | DATACOM, PCM JITTER ATTENUATOR, PDSO16 |
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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