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| 型号： | MAX5947AESA+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/15页 |
| 文件大小： | 269K |
| 描述： | IC CNTRLR HOT SWAP 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 9 V ~ 80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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 e 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礔
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礔
Figure 5. Application Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5947AESA+ | 功能描述:热插拔功率分布 Positive Hot-Swap Controller 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 |
| MAX5947AESA+T | 功能描述:热插拔功率分布 Positive Hot-Swap Controller 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 |
| MAX5947AESA-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 |
| MAX5947BESA | 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 |
| MAX5947BESA+ | 功能描述:热插拔功率分布 Positive Hot-Swap Controller 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 |
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