收藏本站
ZL9117M
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 controller. The controller continuously checks for
the presence of the fault condition, and if the fault condition no
longer exists, the device is re-enabled.
Please refer to Application Note AN2033 for details on how to
select specific overcurrent fault response options via I 2 C/SMBus.
Thermal Overload Protection
The ZL9117M includes a thermal sensor that continuously
measures the internal temperature of the module and shuts
down the controller when the temperature exceeds the preset
limit. The default temperature limit is set to +125°C in the
factory, but the user may set the limit to a different value if
desired. See Application Note AN2033 for details. Note that
setting a higher thermal limit via the I 2 C/SMBus interface may
result in permanent damage to the controller. Once the module
has been disabled due to an internal temperature fault, the user
may select one of several fault response options as follows:
1. Initiate a shutdown and attempt to restart an infinite number
of times with a preset delay period between attempts.
FIGURE 13. OUTPUT RESPONSES TO PRE-BIAS VOLTAGES
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 is asserted (assuming the pre-bias voltage is not higher
than the overvoltage limit). The PWM then adjusts its duty cycle
to match the original target voltage, and the output ramps down
to the preconfigured output voltage.
If a pre-bias voltage higher than the overvoltage limit exists, the
device does not initiate a turn-on sequence and declares an
overvoltage fault condition to exist. In this case, the device
responds based on the output overvoltage fault response method
that has been selected. See “Output Overvoltage Protection” on
page 11 for response options due to an overvoltage condition.
Note that pre-bias protection is not offered for current sharing
groups that also have tracking enabled. V DD must be tied to V IN
for proper prebias start-up in single module operation.
Output Overcurrent Protection
The ZL9117M can protect the power supply from damage if the
output is shorted to ground or if an overload condition is imposed
on the output. 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 number of
times with a preset delay period between attempts.
12
2. Initiate a shutdown and attempt to restart a preset 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.
If the user has configured the module to restart, the controller
waits the preset delay period (if configured to do so) and then
checks the module temperature. If the temperature has dropped
below a threshold that is approximately +15°C lower than the
selected temperature fault limit, the controller attempts to
re-start. If the temperature still exceeds the fault limit, the
controller waits the preset delay period and retries again.
The default response from a temperature fault is an immediate
shutdown of the module. The controller continuously checks for
the fault condition, and once the fault has cleared, the ZL9117M
is re-enabled.
Please refer to Application Note AN2033 for details on how to
select specific temperature fault response options via
I 2 C/SMBus.
I 2 C/SMBus Module Address Selection
Each module must have its own unique serial address to
distinguish between other devices on the bus. The module
address is set by connecting a resistor between the SA pin and
SGND. Table 2 lists the available module addresses.
FN7914.3
July 22, 2013
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ZY1015G-T3 PROGBL CONVERT DC-DC 15A OUT SMD
ZY1115G-T3 PROGBL CONVERT DC-DC 15A OUT SMD
ZY1120G-T3 PROGBL CONVERT DC-DC 20A OUT SMD
ZY1207HG-LN Z-SERIES
ZY1207HG-T3 PROGBL CONVERT DC-DC 7A OUT SMD
ZY2105G PROGBL CONVERT DC-DC 5A OUT THRU
ZY2110G PROGBL CONVERT DC-DC 10A OUT THU
ZY2140G PROGBL CONVERT DC-DC 40A OUT THU
相关代理商/技术参数
ZL9117MIRZ-T 制造商:Intersil Corporation 功能描述:STAND ALONE DIGITAL 17A DC/DC STEP DOWN POWER SUPPLY MODULE, - Tape and Reel 制造商:Intersil Corporation 功能描述:DC/DC CONVERT 0.6-3.6V 17A 制造商:Intersil Corporation 功能描述:Stand alone digital 17A DC/DC step down power supply Module, T/R
ZL928 制造商:Velleman Inc 功能描述:
ZL9V1B 制造商:YEASHIN 制造商全称:YEASHIN 功能描述:500 mW DO-35 Hermetically Sealed Glass Zener Voltage Regulators
ZLA1008 制造商:MISCELLANEOUS 功能描述:
ZL-A1N 制造商:Leach International Corporation 功能描述:MID RANGE - Bulk
ZLAA01A1AR 制造商:HONEYWELL 制造商全称:Honeywell Solid State Electronics Center 功能描述:Global Limit Switches
ZLAA01A1B 制造商:Honeywell Sensing and Control 功能描述:LIMIT SWITCH 1NO/1NC
ZLAA01A1Y 制造商:Honeywell Sensing and Control 功能描述:LIMIT SWITCH 1NO/1NC