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参数资料
| 型号： | MCZ34653EF |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 14/24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
14
Freescale Semiconductor
34653
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSIS FEATURES
rchived by Freescale Semiconductor, Inc., 2008
PROTECTION AND DIAGNOSIS FEATURES
UNDERVOLTAGE
When the input voltage drops below the undervoltage
falling threshold for more than 1.0 ms, an undervoltage fault
is detected and one of the start-up conditions (list on
page
10
) is violated. The 34653 turns off the Power MOSFET
and deactivates the power good output signals, disabling the
load (Point A in Figure 14
). The 34653 stays in this state until
the input voltage rises above the undervoltage rising
threshold for more than 1.0 ms, signaling that the supply
voltage is in the normal operation range (Point B in
Figure 14
). Then a new start-up sequence initiates as
described on page
10
. The undervoltage detection circuit is
also equipped with a 1.0 V hysteresis.
Figure 14. Undervoltage Fault Followed by a
New Start-Up Sequence
Figure 15
shows how the 34653 uses the start-up timer to
make sure that the input voltage is above the undervoltage
falling threshold. The 34653 was in normal operation before
Point A. At Point A an undervoltage fault occurs. Then the
fault is cleared at Point B, and the 34653 initiates a start-up
sequence. Before the end of the start-up timer another
undervoltage fault occurs at Point C, so the 34653 does not
turn on the Power MOSFET. At Point D the fault is cleared
again for the length of the start-up timer and the 34653 turns
on the Power MOSFET and starts the charging process (refer
to Charging Process
, pages 1011).
Figure 15. Start-Up Timer Protection Against
Undervoltage Faults
OVERVOLTAGE
When the input voltage exceeds the overvoltage rising
threshold for more than 1.0 ms, an overvoltage fault is
detected and one of the start-up conditions (list on page
10
)
is violated. The 34653 turns off the Power MOSFET and
deactivates the power good output signals, disabling the
load. The 34653 stays in this state until the input voltage falls
below the overvoltage falling threshold for more than 1.0
ms,
signaling that the supply voltage is in the normal operation
range. Then a new start-up sequence initiates as described
on page
10
. The overvoltage detection circuit is also
equipped with a 2.0 V hysteresis.
The waveforms for an overvoltage fault are shown in
Figure 16
.
Figure 16. Overvoltage Fault
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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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