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| 型号： | MCZ34653EF |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 12/24页 |
| 文件大小： | 1649K |
| 描述： | IC HOTSWAP CTRLR 1A NEG 8-SOIC |
| 标准包装： | 98 |
| 类型： | 热交换开关 |
| 应用： | 通用 |
| 内部开关： | 是 |
| 电流限制： | 1A |
| 电源电压： | 36 V ~ 80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
Analog Integrated Circuit Device Data
12
Freescale Semiconductor
34653
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
rchived by Freescale Semiconductor, Inc., 2008
Figure 9. Overcurrent Mode for More Than 3.0 ms
Figure 10. Overcurrent Mode for Less Than 3.0 ms
DISABLING AND ENABLING THE 34653
When a negative voltage (< 1.8 V below V
PWR
) is applied
to the DISABLE pin for more than 1.0 ms (Point A in
Figure 11
), the 34653 is disabled, the Power MOSFET turns
off, and the power good output signals deactivate. The 34653
stays in this state until the voltage on the DISABLE pin is
brought to within ?1.2 V of V
PWR
for more than 1.0 ms to
enable the device (Point B in Figure 11
). Then a new start-up
sequence initiates as described on page
10
. Applying a
positive voltage (> 1.8 V above V
PWR
) would also disable the
34653 in the same manner.
Figure 11. Disabling and Enabling the 34653
Figure 12
demonstrates that the 34653 must be enabled
for the length of the start-up timer to start turning on the
Power MOSFET. After the fourth disable signal, the 34653
was enabled for the length of the start-up timer. And because
the retry counter is less than 10, the 34653 turns on the
Power MOSFET and starts the charging process (refer to
Charging Process
, pages 1011).
Figure 12. Start-Up Timer Versus Disable
BOARD REMOVAL
When the board is removed, its power ramps down. As
soon as the 34653s input voltage reaches the undervoltage
turn-off threshold, the undervoltage detection circuit activates
and the Power MOSFET turns off for having violated one of
the start-up conditions (list on page
10
).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCZ34653EF/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:1.0 A Negative Voltage Hot Swap Controller |
| MCZ34653EFR2 | 功能描述:热插拔功率分布 Hot Swap Controller 1.0 Neg Vltg 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 |
| MCZ34670EG | 功能描述:热插拔功率分布 POWER OVER ETHERNET 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 |
| MCZ34670EG/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:IEEE 802.3af PD With Current Mode Switching Regulator |
| MCZ34670EGR2 | 功能描述:热插拔功率分布 POWER OVER ETHERNET 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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