收藏本站
ZL9117M
reference module. The remaining modules are members. The
reference module broadcasts its current over the DDC bus. The
members use the reference current information to trim their
voltages (V MEMBER ) to balance the current loading of each
module in the system.
to disable one or more phases to eliminate the current drain and
switching losses associated with those phases, resulting in
higher efficiency.
The ZL9117M offers the ability to add and drop phases using a
PMBus command in response to an observed load current
change. All phases in a current share rail are considered active
prior to the current sharing rail ramp to power-good.
V REFERENCE
-R
Any member of the current sharing rail can be dropped. If the
reference module is dropped, the remaining active module with
the lowest member position becomes the new reference.
V MEMBER
-R
Additionally, any change to the number of members of a current
sharing rail will precipitate autonomous phase distribution within
the rail where all active phases realign their phase position
based on their order within the number of active members.
If the members of a current sharing rail are forced to shut down
due to an observed fault, all members of the rail attempt to
I MEMBER I OUT I REFERENCE
FIGURE 18. ACTIVE CURRENT SHARING
Figure 18 shows that, for load lines with identical slopes, the
member voltage is increased towards the reference voltage
which closes the gap between the inductor currents.
The relation between reference and member current and voltage
is given by Equation 2:
re-start simultaneously after the fault has cleared.
Monitoring via I 2 C/SMBus
A system controller can monitor a wide variety of different
ZL9117M system parameters through the I 2 C/SMBus interface.
The module can monitor for any number of power conversion
parameters including but not limited to the following:
? Input voltage/Output voltage
V MEMBER = V OUT + R × ( I REFERENCE – I MEMBER )
(EQ. 2)
? Output current
? Internal temperature
where R is the value of the droop resistance.
The ISHARE_CONFIG command is used to configure the module
for active current sharing. The default setting is a stand-alone
non-current sharing module. A current sharing rail can be part of
a system sequencing group.
For fault configuration, the current share rail is configured in a
quasi-redundant mode. In this mode, when a member module
fails, the remaining members continue to operate and attempt to
maintain regulation. Of the remaining modules, the module with
the lowest member position becomes the reference. If fault
spreading is enabled, the current share rail failure is not
broadcast until the entire current share rail fails.
The phase offset of (multi-phase) current sharing modules is
automatically set to a value between 0° and 337.5° in 22.5°
increments as in Equation 3:
? Switching frequency
? Duty cycle
Please refer to Application Note AN2033 for details on how to
monitor specific parameters via the I 2 C/SMBus interface.
Snapshot Parameter Capture
The ZL9117M offers a special feature that enables the user to
capture parametric data during normal operation or following a
fault. The SnapShot functionality is enabled by setting bit 1 of
MISC_CONFIG to 1.
See AN2033 for details on using SnapShot in addition to the
parameters supported. The SnapShot feature enables the user to
read parameters via a block read transfer through the SMBus.
This can be done during normal operation, although it should be
noted that reading the 22 bytes occupies the SMBus for some
time.
Phase Offset = SMBus Address [ 4:0 ] – Current
Share Position ? 22.5 °
(EQ. 3)
The SNAPSHOT_CONTROL command enables the user to store
the SnapShot parameters to Flash memory in response to a
Please refer to Application Note AN2034 for additional details on
current sharing.
Phase Adding/Dropping
The ZL9117M allows multiple power converters to be connected
in parallel to supply higher load currents than can be addressed
using a single-phase design. In doing so, the power converter is
optimized at a load current range that requires all phases to be
operational. During periods of light loading, it may be beneficial
15
pending fault, as well as to read the stored data from Flash
memory after a fault has occurred. Table 3 describes the usage
of this command. Automatic writes to Flash memory following a
fault are triggered when any fault threshold level is exceeded,
provided that the specific fault’s response is to shut down
(writing to Flash memory is not allowed if the device is configured
to re-try following the specific fault condition). It should also be
noted that the module’s V DD voltage must be maintained during
the time when the controller is writing the data to Flash memory;
a process that requires between 700μs to 1400μs, depending on
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