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| 型号： | MAX5930AEEG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/23页 |
| 文件大小： | 331K |
| 描述： | IC HOT SWAP CTLR PWR SEQ 24QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 1 V ~ 15 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 带卷 (TR) |
Detailed Description
The MAX5930A/MAX5931A/MAX5931B are circuit-
breaker ICs for hot-swap applications where a line card
is inserted into a live backplane. The MAX5931A/
MAX5931B operate down to 1V provided one of the
inputs is above 2.7V. Normally, when a line card is
plugged into a live backplane, the cards discharged
filter capacitors provide low impedance that can
momentarily cause the main power supply to collapse.
The MAX5930A/MAX5931A/MAX5931B reside either on
the backplane or on the removable card to provide
inrush current limiting and short-circuit protection. This
is achieved by using external n-channel MOSFETs,
external current-sense resistors, and on-chip compara-
tors. The startup period and current-limit threshold of
the MAX5930A/MAX5931A/MAX5931B can be adjusted
with external resistors. Figure 1 shows the MAX5930A/
MAX5931A/MAX5931B functional diagram.
The MAX5930A offers three programmable current lim-
its, selectable fault-management mode, and selectable
STAT_ output polarity. The MAX5930A features fixed
current limits, selectable fault-management mode, and
fixed STAT_ output polarity.
Mode
The MAX5930A/MAX5931A/MAX5931B support three
modes of operation: voltage-tracking, power-sequenc-
ing, and independent mode. Select the appropriate
mode according to Table 1.
Voltage-Tracking Mode
Connect MODE high to enter voltage-tracking mode.
While in voltage-tracking mode, all channels turn on
and off together. To turn all channels on:
" At least one V
IN_
must exceed V
UVLO
(2.45V) for the
UVLO to startup delay (37.5ms).
" All V
IN_
must exceed V
PWRRDY
(0.95V).
" All V
ON_
must exceed V
ON,TH
(0.875V).
" No faults may be present on any channel.
The MAX5930A/MAX5931A/MAX5931B turn off all
channels if any of the above conditions are not met.
After a fault-latched shutdown, cycle any of the ON_
pins to unlatch and restart all channels.
Power-Sequencing Mode
Leave MODE unconnected to enter power-sequencing
mode. While in power-sequencing mode, the
MAX5930A/MAX5931A/MAX5931B turn on and off each
channel depending on the state of the corresponding
V
ON_
. To turn on a given channel:
" At least one V
IN_
must exceed V
UVLO
(2.45V) for the
UVLO to startup delay (37.5ms).
" All V
IN_
must exceed V
PWRRDY
(0.95V).
" The corresponding V
ON_
must exceed V
ON,TH
(0.875V).
" No faults may be present on any channel.
The MAX5930A/MAX5931A/MAX5931B turn off all chan-
nels if any of the above conditions are not met. After a
fault-latched shutdown, cycle any of the ON_ inputs to
unlatch and restart all channels, dependent on the corre-
sponding V
ON_
state.
Independent Mode
Connect MODE to GND to enter independent mode.
While in independent mode the MAX5930A/
MAX5931A/MAX5931B provide complete independent
control for each channel. To turn on a given channel:
" At least one V
IN_
must exceed V
UVLO
(2.45V) for the
UVLO to startup delay (37.5ms).
" The corresponding V
IN_
must exceed V
PWRRDY
(0.95V).
" The corresponding V
ON_
must exceed V
ON,TH
(0.875V).
Low-Voltage, Triple, Hot-Swap Controllers/
Power Sequencers/Voltage Trackers
_______________________________________________________________________________________ 9
MODE
OPERATION
High (Connect to BIAS)
Voltage Tracking
Unconnected
Voltage Sequencing
GND
Independent
Table 1. Operational Mode Selection
PIN
MAX5930A
MAX5931A/
MAX5931B
NAME
FUNCTION
23
19
ON3
On/Off Channel 3 Control Input. See the Mode section.
24
20
MODE
Mode Configuration Input. Mode is configured according to Table 1 as soon as one of the
IN_ voltages exceeds UVLO and before turning on OUT_ (see the Mode section).
Pin Description (continued)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5930EEG | 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 |
| MAX5930EEG+ | 功能描述:热插拔功率分布 Integrated Circuits (ICs) 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 |
| MAX5930EEG+T | 功能描述:热插拔功率分布 Integrated Circuits (ICs) 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 |
| MAX5930EEG-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 |
| MAX5931AEEP+ | 功能描述:热插拔功率分布 Triple 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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