参数资料
| 型号： | MAX5944ESE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC FW CURR LIMITER DUAL 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | FireWire? 应用程序 |
| FET 型： | N 沟道 |
| 输出数： | 2 |
| 内部开关： | 无 |
| 延迟时间 - 关闭： | 100ns |
| 电源电压： | 7.5 V ~ 37 V |
| 电流 - 电源： | 1.3mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 带卷 (TR) |
Dual FireWire Current Limiter and Low-Drop
ORing Switch Controller
TO
V FAULT
t ILIM
I LIMIT
V IN
R SENSE
Q1A
Q2A
FireWire
PORT
ON_ IN_
SENSE_
GATE1_
GATE2_
OUT_
I OUT
MAX5944
V IN
GND
ONQ1
V GATE1
Figure 3. Q1 Current Path During Inital Startup
V GATE2
FROM BATTERY
V OUT
I LIMIT x R LOAD
SOURCE
V INA
+
V IS
30m ?
-
Q1A
Q2A
V INB > V INA
TO FireWire
PORT
(a)
INA
SENSEA GATE1A
GATE2A OUTA
I LOAD
ONA
ONQ1
MAX5944
GND
V FAULT
ONB
< t ILIM
I LIMIT
INB
SENSEB GATE1B
GATE2B OUTB
V INB
30m ?
Q1B
Q2B
I OUT
Figure 4. MAX5944 ORing Controller Rerouting Load Current
from the higher supply input (INB) to OUTB, and then to
V GATE1
V GATE2
the load (Figure 5).
Reverse-Current Override (ONQ1 = HIGH)
Drive ONQ1 high to disable the MAX5944 power-sup-
ply ORing. Disabling the MAX5944 ORing function
allows reverse-current flow through the power-supply
V OUT
I LIMIT x R LOAD
(b)
system. When ONQ1 is high, GATE1A and GATE1B
remain fully enhanced as long as their respective V IN_
is greater than 7.5V, V ON_ is above the 1.24V threshold,
and the channels are not in a current-limit fault condi-
tion. The MAX5944 reverse-current flow feature permits
Figure 2. MAX5944 Current-Limit Timing Diagram
When a higher voltage supply is connected at OUTA
(Figure 4), V IS drops below the ORing threshold. The
MAX5944 immediately turns off Q1A, blocking reverse-
current flow from OUTA to INA. Power is then routed
a higher voltage source connected at Port 1 to be rout-
ed to Port 2, as long as the voltage at both inputs (IN_)
is initially above the minimum 7.5V operating range,
see Figure 6.
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5944EVKIT | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX5944 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX5945CAX | 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 |
| MAX5945CAX+ | 功能描述:热插拔功率分布 IEEE 802.3af Quad Net Pwr 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 |
| MAX5945CAX+T | 功能描述:热插拔功率分布 IEEE 802.3af Quad Net Pwr 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 |
| MAX5945CAX-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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