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參數(shù)資料
| 型號(hào)： | MAX5903LAETT+T |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 333K |
| 描述： | IC HOT-SWAP CONTROLLER 6-TDFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | Simple Swapper™ |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電源電壓： | 9 V ~ 72 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-WDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 6-TDFN 裸露焊盤（3x3） |
| 包裝： | 帶卷 (TR) |
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
Controllers
_______________________________________________________________________________________ 7
A thermal shutdown feature protects the external MOS-
FET by turning it off if the die temperature of the
MAX5902/MAX5903 exceeds +125癈. The MAX5902/
MAX5903 must be in good thermal contact with the
external MOSFET. See Layout Guidelines in the Appli-
cations section of the data sheet.
A circuit-breaker function monitors the voltage across
the external MOSFET, V
SD
, and turns off the MOSFET if
V
SD
exceeds the circuit-breaker threshold, V
CB
. The
circuit-breaker function is enabled after the MOSFET is
fully enhanced. Three threshold voltage options are
available300mV, 400mV, and 500mV. One version is
available with no circuit-breaker function. Fault man-
agement for the MAX5902/MAX5903 is offered with two
different configurations; latched and automatic retry.
Latched Circuit Breaker
After a circuit-breaker trip event, the latched
versions (MAX5902L/MAX5903L) drive GATE to
V
S
, turning off the external MOSFET, and PGOOD
(PGOOD) is deasserted. A latched off condition
needs to be reset by toggling ON/OFF low for at
least 10ms, or by cycling the power supply, V
S
.
Automatic Retry Circuit Breaker
After a circuit-breaker trip event, the automatic retry
versions (MAX5902A/MAX5903A) drive GATE to V
S
,
turning off the external MOSFET, and PGOOD
(PGOOD) is deasserted. If the start conditions are met
for a full 150ms (t
RS
) the start sequence is re-initiated.
The start conditions are: the device is not in UVLO;
ON/OFF is not driven low; and the device is not in ther-
mal shutdown.
No Circuit Breaker
For the versions without a circuit breaker, MAX5902N
(MAX5903N), PGOOD (PGOOD) are asserted when the
MOSFET is fully enhanced. Once powered up the
MAX5902N/MAX5903N ignore the MOSFET drain-to-
source voltage for applications where a circuit-breaker
function is not desired.
Applications Information
ON/OFF Control Input
The ON/OFF control input provides three functions:
external ON/OFF control; setting of the UVLO level; and
resetting after a circuit-breaker event has caused the
MAX5902L/MAX5903L to turn off the external MOSFET.
Pulling ON/OFF to GND for at least 10ms (t
OFF
) forces
the MAX5902/MAX5903 to turn off the external MOSFET
(see Figure 3 for a circuit example). To reset the
MAX5902L/MAX5903L after a circuit-breaker event,
toggle ON/OFF to GND for at least 10ms (t
OFF
).
ON/OFF can be used to sequence power supplies.
Connecting a capacitor from ON/OFF to GND will delay
the rise of ON/OFF proportional to the capacitance and
input impedance of ON/OFF, typically 33k& (Figure 4).
The MAX5902/MAX5903 can be controlled by logic-
level signals. Logic-level signals of 3.3V or 1.8V may be
directly connected to ON/OFF. For 5V logic level control,
insert a series 47k& resistor as shown in Figure 5.
Figure 4. Power-Supply Sequencing
HOT-SWAP CONTROLLER #1
V
S
GND
C
2C
MAX5902
MAX5903
V
S
ON/OFF
HOT-SWAP CONTROLLER #2
GND
V
S
GND
MAX5902
MAX5903
ON/OFF
HOT-SWAP CONTROLLER
OPTIONAL
+24V
V
S
GND
R2
40.2k&
R1
3.01k&
MAX5902
MAX5903
GND
DGND
ON/OFF
ON/OFF
Figure 3. Programmed +18V Lockout, with Optional Optocoupler
On/Off Control.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5903LAEUT | 制造商:Maxim Integrated Products 功能描述:SIMPLE SWAPPER HOT-SWAP SWITCHES - Rail/Tube |
| MAX5903LAEUT+ | 制造商:Maxim Integrated Products 功能描述:+72V SOT23/TDFN SIMPLE SWAPPER HOT-SWAP CONTROLLERS - Bulk |
| MAX5903LAEUT+T | 功能描述:熱插拔功率分布 72V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5903LAEUT-T | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5903LBETT | 制造商:Maxim Integrated Products 功能描述:SIMPLE SWAPPER HOT-SWAP SWITCHES - Rail/Tube |
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