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参数资料
| 型号： | MAX5929DEEG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/23页 |
| 文件大小： | 340K |
| 描述： | IC HOT SWAP CTLR QUAD 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) |
Slow-Comparator Startup Period
The slow comparator is disabled during the startup
period while the external MOSFETs are turning on.
Disabling the slow comparator allows the device to
ignore the higher-than-normal inrush current charging
the board capacitors when a card is first plugged into a
live backplane.
Slow-Comparator Normal Operation
After the startup period is complete, the slow compara-
tor is enabled and the device enters normal operation.
The comparator threshold voltage (V
SC,TH
) is
adjustable from 25mV to 100mV. The slow-comparator
response time is 3ms for a 1mV overdrive. The
response time decreases to 100祍 with a large over-
drive. The variable-speed response time allows the
MAX5927A/MAX5929AMAX5929D to ignore low-
amplitude momentary glitches, thus increasing
system noise immunity. After an extended overcurrent
condition, a fault is generated, STAT_ outputs are
deasserted, and the MOSFET gates are discharged
with a 3mA pulldown current.
Fast-Comparator Startup Period
During the startup period, the fast comparator regu-
lates the gate voltages to ensure that the voltage
across the sense resistor does not exceed the startup
fast-comparator threshold voltage (V
SU,TH
), V
SU,TH
is
scaled to two times the slow-comparator threshold
(V
SC,TH
).
Fast-Comparator Normal Operation
In normal operation, if the load current reaches the fast-
comparator threshold, a fault is generated, STAT_ is
deasserted, and the MOSFET gates are discharged
with a strong 50mA pulldown current. This happens in
the event of a serious current overload or a dead short.
The fast-comparator threshold voltage (V
FC,TH
) is
scaled to two times the slow-comparator threshold
(V
SC,TH
). This comparator has a fast response time of
200ns (Figure 7).
Undervoltage Lockout (UVLO)
The UVLO prevents the MAX5927A/MAX5929A
MAX5929D from turning on the external MOSFETs until
one input voltage exceeds the UVLO threshold (2.45V)
for t
D,UVLO
. The MAX5927A/MAX5929AMAX5929D
use power from the highest input voltage rail for the
charge pumps. This allows for more efficient charge-
pump operation. The highest V
IN_
is provided as an
output at BIAS. The UVLO protects the external
MOSFETs from an insufficient gate-drive voltage.
Low-Voltage, Quad, Hot-Swap
Controllers/Power Sequencers
_____________________________________________________________ ______________________________________________________ ________________________________ ____ _____________________ 15
Figure 6. Independent Mode Startup Waveforms
t
ON
V
DRIVE
V
GATE_
V
GATE_
ON_
STAT_
V
TH
V
OUT_
V
OUT_
I
LOAD_
t
START
C
BOARD_
= LARGE
C
BOARD_
= 0
V
FC,TH
R
SENSE_
Figure 7. VariableSpeed/BiLevel Response
SENSE VOLTAGE (V
IN
- V
SENSE
)
V
SC,TH
V
FC,TH
(2 x V
SC,TH
)
3ms
130約
200ns
SLOW
COMPARATOR
FAST
COMPARATOR
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5929LHEEG | 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 |
| MAX5929LHEEG+ | 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 |
| MAX5929LHEEG+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 |
| MAX5929LHEEG-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 |
| MAX5929LLEEG | 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 |
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