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參數資料
| 型號： | MAX5937LCESA+ |
| 廠商： | Maxim Integrated |
| 文件頁數： | 17/23頁 |
| 文件大小： | 382K |
| 描述： | IC HOT-SWAP CTRLR -48V 8-SOIC |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 無 |
| 電源電壓： | -10 V ~ -80 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
-48V Hot-Swap Controllers with V
IN
Step Immunity and No R
SENSE
______________________________________________________________________________________ 17
load-probe, and V
EE
. Because of the nature of the hot-
swap requirement, no decoupling capacitor is recom-
mended for the MAX5936/MAX5937. Because there is
no decoupling capacitor, stray inductance can result in
excessive ringing at the GND pin during power-up or
during very rapid V
IN
steps. This should be examined
in every application design since ringing at the GND
pin may exceed the absolute maximum supply rating
for the part.
Input Transient Protection
During hot plug-in/unplug and fast V
IN
steps, stray
inductance in the power path can cause voltage ring-
ing above the normal input DC value, which may
exceed the absolute maximum supply rating. An input
transient such as that caused by lightning can also put
a severe transient peak voltage on the input rail. The
following techniques are recommended to reduce the
effect of transients:
1) Minimize stray inductance in the power path using
wide traces and minimize loop area including the
power traces and the return ground path.
2) Add a high-frequency (ceramic) bypass capacitor
on the backplane as close as possible to the plug-
in connector (Figure 17).
3) Add a 1k& resistor in series with the MAX5936/
MAX5937s GND pin and a 0.1礔 capacitor from
GNDtoV
EE
to limit transientcurrent going into this pin.
Appendix A
GATE Cycles
The power-up GATE cycle and the step GATE cycle are
quite similar but have distinct differences. Understanding
these differences may clarify application issues.
GATE Cycle During Power-Up
The power-up GATE cycle occurs during the initial
power-up of the MAX5936/MAX5937 and the associat-
ed power MOSFET and load. The power-up GATE
cycle can result in full enhancement or in a fault (all
voltages are relative to V
EE
).
Power-Up to Full Enhancement:
1) At the beginning of the power-up sequence to the
start of the power-up GATE cycle, the GATE is held
at V
EE
. Following a successful completion of the
load-probe test, GATE is held at V
EE
for an addi-
tional 350祍 and then is allowed to float for 650祍.
At this point, the GATE begins to ramp with 52礎
charging the gate of the power MOSFET. [GATE
turn-on]
2) When GATE reaches the gate threshold voltage of
the power MOSFET, V
OUT
begins to ramp down
toward V
EE
. [V
OUT
ramp]
3) When V
OUT
ramps below 72% V
CB
, the GATE is
rapidly pulled to full enhancement and the power-
up GATE cycle is complete. 1.26ms after GATE is
pulled to full enhancement, PGOOD will assert. [Full
enhancement]
Figure 15. MAX5936/MAX5937 Slew Rate vs. C
SLEW
SLEW RATE vs. C
SLEW
C
SLEW
(nF)
100
10
1
0.1
1
10
0.01
0.1
1000
Figure 16. Adjusting the MAX5936/MAX5937 Slew Rate
MAX5936
MAX5937
V
OUT
C
LOAD
LOAD
GATE
V
EE
GND
C
SLEW
R
GATE
-48V
GND
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5937LCESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LCESA+T | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LCESA-T | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LNESA | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5937LNESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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