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參數(shù)資料
| 型號： | MAX5933BESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-Input Positive-NAND Gates 14-CFP -55 to 125 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, MS012AA, SOIC-8 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 269K |
| 代理商： | MAX5933BESA |
M
Positive High-Voltage, Hot-Swap Controllers
_______________________________________________________________________________________
9
Detailed Description
The MAX5933_ and MAX5947_ are fully integrated hot-
swap controllers for positive supply rails. The devices
allow for the safe insertion and removal of circuit cards
into live backplanes without causing glitches on the
backplane power-supply rail. During startup, the
MAX5933_ and MAX5947_ act as current regulators
using an external sense resistor and a MOSFET to limit
the amount of current drawn by the load.
The MAX5933_ operate from a +33V to +80V supply
voltage range and have a default undervoltage lockout
(UVLO) set to +31V. The MAX5947_ operate from a
+9V to +80V supply voltage range and have a default
UVLO set to +8.3V. The UVLO threshold is adjustable
using a resistive divider connected from V
CC
to ON to
GND (see Figure 5).
The MAX5933_ and MAX5947_ monitor the input volt-
age, the output voltage, the output current, and the die
temperature. These devices feature power-good outputs
(PWRGD/
PWRGD
) to indicate the status of the output
voltage by monitoring the voltage at FB (see the
Power-
Good Detection
section).
As shown in Figure 5, a sense resistor is connected
between V
CC
and SENSE to regulate the voltage
across the sense resistor (V
IN
- V
SENSE
) to 47mV when
the voltage at FB
≥
0.5V. The current-limit threshold
(V
SENSETRIP
) decreases linearly from 47mV to 12mV as
FB decreases from 0.5V to 0V.
An undervoltage fault is detected when ON goes below
the threshold (V
ONL
= 1.233V) and the voltage at GATE
goes low as a result to turn off the MOSFET. ON must
pass the V
ONH
= 1.313V threshold to turn on the
MOSFET again.
R6
1k
5%
C1
10nF
D1
CMPZ5248B
Q1
IRF530
R5
10
5%
R
SENSE
0.025
R3
59k
1%
R4
3.57k
1%
R7
24k
5%
C
L
R2
3.4k
1%
R1
49.9k
1%
C2
0.68
μ
F
MAX5933A
PWRGD
GND
V
IN
24V
TIMER
ON
PWRGD
FB
GND
V
CC
SENSE
GATE
5
1
3
2
4
8
7
6
0.1
μ
F
Figure 5. Application Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5933C | 8-Input Positive-NAND Gates 14-CDIP -55 to 125 |
| MAX5933CESA | 8-Input Positive-NAND Gates 20-LCCC -55 to 125 |
| MAX5947CESA | Positive High-Voltage, Hot-Swap Controllers |
| MAX5940A | IEEE 802.3af PD Interface Controller For Power-Over-Ethernet |
| MAX5940B | IEEE 802.3af PD Interface Controller For Power-Over-Ethernet |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5933BESA+ | 功能描述:熱插拔功率分布 Positive 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5933BESA+T | 功能描述:熱插拔功率分布 Positive 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5933BESA-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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5933CESA | 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5933CESA+ | 功能描述:熱插拔功率分布 Positive 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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