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| 型号： | ZL2004EVK1 |
| 厂商： | Intersil |
| 文件页数： | 29/42页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR ZL2004 |
| 标准包装： | 1 |
| 系列： | * |
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ZL2004
If a pre-bias voltage higher than the overvoltage limit
exists, the device will not initiate a turn-on sequence
and will declare an overvoltage fault condition to exist.
In this case, the device will respond based on the
output overvoltage fault response method that has been
selected. See Section 6.2 “Output Overvoltage
Protection,” for response options due to an overvoltage
condition.
Pre-bias protection is not offered for current sharing
groups that also have tracking enabled.
6.4 Output Overcurrent Protection
The ZL2004 can protect the power supply from
damage if the output is shorted to ground or if an
overload condition is imposed on the output. Once the
current limit threshold has been selected (see Section
5.8 “ Current Limit Threshold Selection ”), the u ser may
determine the desired course of action in response to
the fault condition. The following overcurrent
protection response options are available:
1. Initiate a shutdown and attempt to restart an
infinite number of times with a preset delay period
between attempts.
2. Initiate a shutdown and attempt to restart a preset
Figure 17. Output Responses to Pre-bias Voltages
The actual time the output will take to ramp from the
pre-bias voltage to the target voltage will vary
depending on the pre-bias voltage but the total time
elapsed from when the delay period expires and when
the output reaches its target value will match the pre-
If a pre-bias voltage higher than the target voltage
exists after the pre-configured delay period has
expired, the target voltage is set to match the existing
pre-bias voltage and both drivers are enabled with a
PWM duty cycle that would ideally create the pre-bias
voltage. Once the pre-configured soft-start ramp period
has expired, the PG pin will be asserted (assuming the
pre-bias voltage is not higher than the overvoltage
limit). The PWM will then adjust its duty cycle to
match the original target voltage and the output will
ramp down to the pre-configured output voltage.
29
number of times with a preset delay period
between attempts.
3. Continue operating for a given delay period,
followed by shutdown if the fault still exists.
4. Continue operating through the fault (this could
result in permanent damage to the power supply).
5. Initiate an immediate shutdown.
The default response from an overcurrent fault is an
immediate shutdown of the device. The device will
continuously check for the presence of the fault
condition, and if the fault condition no longer exists the
device will be re-enabled.
Refer to AN33 for details on how to select specific
overcurrent fault response options.
FN6846.3
February 15, 2011
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZL2005 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Digital-DC? Integrated Power Management and Conversion IC |
| ZL2005ALNF | 制造商:Intersil Corporation 功能描述:DIGITAL DC-DC CONTROLLER W/ DRIVERS - TRAY100 - Trays 制造商:Intersil Corporation 功能描述:IC REG CNTRLR BUCK PWM 36-QFN 制造商:Intersil Corporation 功能描述:Digital DC-DC Controller w/ Drivers - BULK 50 |
| ZL2005ALNFT | 功能描述:电压模式 PWM 控制器 DIGTL DC-DC CNTRLR W/DRVRS TR100 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| ZL2005ALNFT1 | 功能描述:电压模式 PWM 控制器 DIGTL DC-DC CNTRLR W/DRVRS TR1K RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| ZL2005P | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Digital-DC? Controller with Drivers and POLA/DOSA Trim |
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