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參數(shù)資料
| 型號(hào)： | MAX5910ESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | +65V Simple Swapper Hot-Swap Switches |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, MS-012AA, SOIC-8 |
| 文件頁(yè)數(shù)： | 9/11頁(yè) |
| 文件大?。?/td> | 273K |
| 代理商： | MAX5910ESA |
M
+65V Simple Swapper Hot-Swap Switches
_______________________________________________________________________________________
9
Thermal Shutdown Fault
The MAX5910/MAX5917 monitor their internal die tem-
perature. If the temperature of the die exceeds +140
°
C,
the internal FET is turned off and
IFAULT
and PGOOD
are pulled low. The output is enabled again only when
the die temperature is below the thermal shutdown tem-
perature by 3.5
°
C typically.
Power-Good (PGOOD)
Power-good (PGOOD) logic output signals when the
output has exceeded the PGOOD threshold. When the
output voltage is below 70% of the input voltage,
PGOOD is pulled low. When the output voltage is larger
than 80% of the input voltage for more than 12ms,
PGOOD is asserted.
Applications Information
Choosing a Device
The MAX5910 can output 280mA, the MAX5917B can
output 420mA, and the MAX5917A can output up to
567mA. In applications where high power is expected,
use the MAX5917 for its superior heat dissipation prop-
erties, and always solder all of its GND pins to a large
section of circuit board copper.
Logic Control
The enable input (ENABLE) responds to 3.3V logic sig-
nals and will force the internal FET off if ENABLE is
pulled low. This feature allows the host to disconnect
the load from the power bus if required. Drive ENABLE
high to enable V
OUT
.
Changing the Undervoltage Lockout
Setting
The undervoltage lockout (UVLO) value defaults to
26.5V if the UVLO pin is left open circuit (Figure 3).
Connect UVLO to V
IN
to set the undervoltage lockout to
a minimum of 7.5V (Figure 4). This lockout voltage can
also be changed with a resistive-divider from V
IN
to
GND. The center node of the divider is connected to
the UVLO pin (Figure 5). The values of R1 and R2 must
satisfy the condition R1//R2 << 260k
and R2 <<
1.65M
. R2 can be calculated as follows:
R2 = R1
[(V
UVLO
/ 7.5V) - 1]
where V
IN (UVLO)
is the desired lockout voltage.
+3.3V
IFAULT
V
IN
V
IN
ENABLE
GND
V
OUT
V
OUT
N.C.
PGOOD
UVLO
R
R
MAX5910
+3.3V
V
IN
V
IN
0.1
μ
F
ENABLE
GND
V
OUT
V
OUT
N.C.
PGOOD
UVLO
10k
10k
MAX5910
IFAULT
Figure 3. UVLO is Set Internally to its +26.5V Default Value
Figure 4. Minimum +7.5V UVLO Configuration
+3.3V
IFAULT
V
IN
V
IN
ENABLE
GND
V
OUT
V
OUT
N.C.
PGOOD
UVLO
10k
R1
R2
10k
MAX5910
0.1
μ
F
Figure 5. Adjusting UVLO with an External Resistive-Divider
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5910ESA+ | 功能描述:熱插拔功率分布 65V 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 |
| MAX5910ESA+T | 功能描述:熱插拔功率分布 65V 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 |
| MAX5910ESAT | 制造商:MAXIM 功能描述:NEW |
| MAX5910ESA-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 |
| MAX5911ESA | 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 |
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