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参数资料
| 型号： | XRP7714EVB-DEMO-2P-KIT |
| 厂商： | Exar Corporation |
| 文件页数： | 5/11页 |
| 文件大小： | 0K |
| 描述： | DEV KIT FOR XRP7714 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，LDO 步降 |
| 输出及类型： | 4，非隔离 |
| 输出电压： | 0.9 ~ 5.1 V |
| 输入电压： | 5.5 V ~ 25 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz ~ 1.5MHz |
| 板类型： | 完全填充 |
| 已供物品： | 2 个板，线缆，带软件的闪存驱动器 |
| 已用 IC / 零件： | XRP7714 |
| 其它名称： | 1016-1609 |
X R P 7 7 X X E V B - X C M
X R P 7 7 X X C o n f i g u r a t i o n M o d u l e
Note that only one configuration can be stored
in the XCM. When storing the configuration
onto the XCM, a “Success” window will pop up.
After clicking “OK” there can be a noticeable
delay in the software.
Powering the XCM
In order to operate, the XCM must have power
provided either by connecting the VIN pin on
JP4 to a power source from the system board
or from USB power.
The XCM’s on board linear regulator has a
maximum input voltage of 30V, so whatever
voltage source is powering the Power XR device
on the system board can be connected to the
XCM.
Downloading the Configuration
The XCM will download the configuration
stored on the XCM FLASH memory on every
reset of the supported device. It does by
monitoring the ENABLE Pin for a LOW to HIGH
transition.
The XCM automatically downloads the saved
Flash configuration into the supported device
shadow registers via I 2 C. The register data is
loaded in a specific order to prevent mis-
operation of the supported device. The XCM
first configures Fault Ignore settings,
downloads channel information, and finally
configures the channel and GPIO enables.
One could imagine the result, if the channel
was enabled before the control loop PID
coefficients were loaded.
NVM Programming
When in Standalone Mode, the primary
intention for the XCM is to act as a boot loader
into the shadow RAM. However, by installing
a jumper between pins 2-4 on JP1, the XCM
will program the NVM. There are no
diagnostics in this mode. If a device’s NVM
has already been programmed, it cannot be
re-programmed. If a changed configuration is
attempted to be programmed into a previously
programmed part, erroneous behavior is
highly likely. The reason for including this
function is for the developer who has
concluded their evaluation and wishes to
quickly program the NVM of the Power XR
device on additional systems.
W HEN T HINGS D O N OT W ORK
The following are potential issues that may
cause improper or no operation.
? SCL, SDA, or GND are swapped.
? Check that the I2C pull-up resister jumpers
on JP2 and JP3 are in place. Or correctly
configured for your system.
? If you made your own ribbon cable with a
10 pin connector and accidentally attach it
reversed, you just tied VIN to SCL and
damaged the uC. Time for a new XCM.
? You are using 2 foot long wires hanging
loose creating an inductive loop which is
blocking the I2C communication. Twisting
them together should reduce the
inductance.
? You can communicate to the part when it is
not operating, but when you turn on the
switching channels, communication stops.
This is difficult to fix because the most
likely cause is ground bounce caused by
poor grounding practices. See ANP-32,
“Practical Layout Guidelines for Power XR
Designs”
? Another possibility if communication is not
working is a long ground loop causing
noise. One could put an isolator on the I2C
line, but using a notebook computer with
the power adapter disconnected works as
well.
? 2012 Exar Corporation
5/11
Rev. 1.3.1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRP7714EVB-ZYNQ-1 | 功能描述:XRP7714 - DC/DC, Step Down Outputs Evaluation Board 制造商:exar corporation 系列:- 零件状态:在售 主要用途:DC/DC，步降 输出和类型:- 功率 - 输出:- 电压 - 输出:- 电流 - 输出:- 电压 - 输入:- 稳压器拓扑:降压 频率 - 开关:- 板类型:完全填充 所含物品:板 使用的 IC/零件:XRP7714 标准包装:1 |
| XRP7714EVB-ZYNQ-1-KIT | 功能描述:XRP7714 - DC/DC, Step Down Outputs Evaluation Board 制造商:exar corporation 系列:- 零件状态:在售 主要用途:DC/DC，步降 输出和类型:- 功率 - 输出:- 电压 - 输出:- 电流 - 输出:- 电压 - 输入:- 稳压器拓扑:降压 频率 - 开关:- 板类型:完全填充 所含物品:板，线缆 使用的 IC/零件:XRP7714 标准包装:1 |
| XRP7714ILB-0X10-F | 功能描述:电压模式 PWM 控制器 4CH DIGITAL PWM CNTL I2C INTERFACE 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 |
| XRP7714ILB-0X14-F | 功能描述:电压模式 PWM 控制器 4CH DIGITAL PWM CTRL I2C INTERFACE 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 |
| XRP7714ILB-0X18-F | 功能描述:电压模式 PWM 控制器 4CH DIGITAL PWM CTRL I2C INTERFACE 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 |
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