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参数资料
| 型号： | MAX5930AEEG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/23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： | 50 |
| 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： | 管件 |
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 MAX5930A/MAX5931A/
MAX5931B from turning on the external MOSFETs until
one input voltage exceeds the UVLO threshold (2.45V)
for t
D,UVLO
. The MAX5930A/MAX5931A/MAX5931B use
power from the highest input voltage rail for the charge
pumps. This allows for more efficient charge-pump oper-
ation. The highest V
IN_
is provided as an output at BIAS.
The UVLO protects the external MOSFETs from an insuffi-
cient gate-drive voltage. t
D,UVLO
ensures that the board
is fully inserted into the backplane and that the input volt-
ages are stable. The MAX5930A/MAX5931A/MAX5931B
include a UVLO glitch filter (t
D,GF
) to reject all input volt-
age noise and transients. Bringing all input supplies
below the UVLO threshold for longer than t
D,GF
reinitiates
t
D,UVLO
and the startup period, t
START
. See Figure 8 for
an example of automatic turn-on function.
Latched and Autoretry Fault Management
The MAX5930A can be configured to latch the external
MOSFETs off or to autoretry (see Table 2). Toggling
ON_ below 0.875V for at least 100祍 clears the
MAX5930A/MAX5931A/MAX5931B (LATCH = uncon-
nected) fault and reinitiates the startup period.
Similarly, the MAX5930A/MAX5931A/MAX5931B
(LATCH = GND) turn the external MOSFETs off when
an overcurrent fault is detected, then automatically
restart after the autoretry delay that is internally set to
64 times t
START
.
Status Outputs (STAT_)
The status (STAT_) outputs are open-drain outputs that
assert when hot swap is successful and t
START
has
elapsed. STAT_ deasserts if ON_ is low or if the chan-
nel is turned off for any fault condition.
The polarity of the STAT_ outputs is selected using POL
for the MAX5930A (see Table 3). Tables 4 and 5 con-
tain the MAX5930A/MAX5931A/MAX5931B truth tables.
Low-Voltage, Triple, Hot-Swap Controllers/
Power Sequencers/Voltage Trackers
______________________________________________________________________________________ 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 |
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|---|---|
| MAX5930AEEG+ | 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 |
| MAX5930AEEG+T | 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 |
| 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 |
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