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参数资料
| 型号： | MAX5901LBEUT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/14页 |
| 文件大小： | 290K |
| 描述： | IC HOT-SWAP CONTROLLER SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Simple Swapper™ |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | -9 V ~ -100 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
Turn-On and Turn-Off Delays
After power is applied, or ON/OFF is released, there is
a 300ms delay (t
ON
) before the gate ramp is started.
This delay is also the automatic restart time delay.
In the event of a circuit-breaker condition or an over-
temperature fault condition, the turn-off delay is less
than 2祍. An undervoltage condition must exist for at
least 20ms (t
OFF
) before the MAX5900/MAX5901 turn
off the external MOSFET. ON/OFF must be held low for
at least 20ms (t
OFF
) before the MAX5900/MAX5901 turn
off the external MOSFET. Turn-off delay minimizes spu-
rious shutdowns due to noisy signals or momentary
voltage spikes, as well as preventing accidental
resetting of the circuit-breaker latch (MAX5900L/
MAX5901L).
Thermal Shutdown
A thermal shutdown feature helps protect the external
MOSFET. If the die temperature of the MAX5900/
MAX5901 exceeds +125癈, the MOSFET is turned off.
For accurate performance, the MAX5900/MAX5901
must be in close thermal contact with the external
MOSFET (see the Layout Guidelines section). Due to
the low power dissipation of the MAX5900/MAX5901, its
junction temperature will typically be within a few
degrees of the MOSFET. All versions of the MAX5900/
MAX5901 automatically restart from a temperature fault
when the junction temperature drops below +110癈.
Undervoltage Lockout
The MAX5900/MAX5901 turn off the external MOSFET if
the magnitude of the input voltage is below the level set
by ON/OFF for longer than 20ms (t
OFF
). If ON/OFF is
left unconnected, the lockout voltage (V
UVLO
) defaults
to -31.5V. V
UVLO
may also be set to any value within
the power-supply range by using external resistors. To
set the lockout voltage to a value between -9V and
-100V, use a resistor-divider connected between GND
and V
EE
, with the center node of the divider connected
to ON/OFF. For example, use a 3k& resistor (R1 in
Figure 2) from ON/OFF to V
EE
and calculate the other
resistor, R2, using:
where V
UVLO
is the desired lockout voltage, and
V
ON/OFF
is the ON/OFF reference threshold specified in
the Electrical Characteristics table (typically 1.26V).
Figure 2 shows an example circuit with V
UVLO
set for
-20V. To defeat the UVLO, simply connect a single 100k&
resistor between ON/OFF and GND, as shown in Figure 4.
R
R
V
UVLO
2
1
1 26
1
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
.
-100V, SOT23/TDFN, Simple Swapper
Hot-Swap Controllers
_______________________________________________________________________________________ 7
HOT-SWAP CONTROLLER
OPTIONAL
-48V
V
EE
GND
R2
47k&
R1
3k&
MAX5900
GND
ON/OFF
ON/OFF
MAX5901
DGND
HOT-SWAP CONTROLLER #1
V
EE
GND
C
2C
MAX5900
GND
ON/OFF
HOT-SWAP CONTROLLER #2
V
EE
V
EE
GND
ON/OFF
MAX5901
MAX5900
MAX5901
Figure 2. Programmed -20V Lockout With Optional
Optocoupler On/Off Control
Figure 3. Power-Supply Sequencing
Figure 4. Defeating Undervoltage Lockout
HOT-SWAP CONTROLLER
-48V
V
EE
GND
100k&
MAX5900
GND
ON/OFF
MAX5901
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| MAX5901LCETT-T | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5901LCEUT | 制造商:Maxim Integrated Products 功能描述:SIMPLE SWAPPER HOT-SWAP CONTROLLER - Cut Tape Product |
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