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参数资料
| 型号： | MAX5913AEMH+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/20页 |
| 文件大小： | 614K |
| 描述： | IC HOT SWAP CTLR QUAD 48V 44MQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 类型： | 热交换控制器 |
| 应用： | IP 电话，LAN 网络供电，网络路由器和交换机 |
| 内部开关： | 无 |
| 电源电压： | 35 V ~ 72 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 托盘 |
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
14 ______________________________________________________________________________________
Internally the circuit compares the output voltage with
V
CC
to determine when the FET is completely on. A
POK condition is met when:
(V
CC
- V
OUT
) d 1.5V
The internal circuit monitors V
OUT
to determine the
value of the foldback current when the circuit goes into
current-limit conditions. The value of the current limit
decreases as the output voltage decreases in order to
limit the power dissipation of the FET. The nonlinear
relationship between V
OUT
and I
LIM
is depicted in
Figure 8.
The foldback circuit is active whenever the MAX5913A/
MAX5914A are in current-limit mode after an overcur-
rent condition has been detected.
Connect a catch diode to analog ground and a 100&
resistor in series with OUT_ to limit the current during
negative inductive kicks that can bring OUT_ below the
ground potential (Figure 5).
Relay Drivers
The MAX5913A/MAX5914A include on-chip relay drivers,
RYLD_, capable of sinking 100mA. When RLYON_ goes
high, the MAX5913A/MAX5914A immediately enable the
relay driver, and the corresponding ON_ switch control
input is delayed 25.6ms to allow the relay to close under
a zero-voltage condition. When RLYON_ goes low, the
MAX5913A/MAX5914A immediately turn off the corre-
sponding switch, and then turn off the relay driver after a
3.2ms delay, ensuring the relay contacts open under a
zero-current condition. The polarity of the MAX5913A
FOLDBACK
NL CONTROL
FROM LOGIC
CONTROLLER
DRAIN
R
SENSE
GATE
TO LOGIC
CONTROLLER
CSP
10礎
8礎
1mA
OUT
OCEN
ON
AGND
DGND
RLYON
RLYD
V
RLY
V
CC
CHARGE PUMP
POK COMPARATOR
DELAY
DUAL LEVEL
DETECTION
1mA
V
DD
1.236V
UVLO
RTIM
DC
RTRYEN
OPEN-CIRCUIT
DETECTOR
DC COUNTER
RESET LOGIC
RELAY
CONTROL
TIMING
OSCILLATOR
LOGIC
CONTROLLER
CSP -1.5V
3mV
142.5mV
420mV
V
DD
DGND
MAX5913A
MAX5914A
Figure 6. Functional Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| MAX5916EUI+ | IC HOT-SWAP CTRLR DUAL 28-TSSOP |
| MAX5917BESE+ | IC HOT-SWAP SWITCH 65V 16-SOIC |
| MAX5920BESA+ | IC HOT-SWAP CTRLR -48V 8-SOIC |
| MAX5922AEUI+ | IC NETWORK PWR SW +48V 28-TSSOP |
| MAX5923EUP+T | IC HOT-SWAP SWITCH +60V 20-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5913AEMH+ | 功能描述:热插拔功率分布 48V 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 |
| MAX5913AEMH+D | 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 44MQFP - Rail/Tube |
| MAX5913AEMH+T | 功能描述:热插拔功率分布 48V 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 |
| MAX5913AEMH+TD | 制造商:Maxim Integrated Products 功能描述:HOT SWAP CNTRLR 44MQFP - Tape and Reel |
| MAX5913AEMH-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 |
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