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参数资料
| 型号： | L6706 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, QCC40 |
| 封装： | 6 X 6 MM, ROHS COMPLIANT, VFQFPN-40 |
| 文件页数： | 21/47页 |
| 文件大小： | 623K |
| 代理商： | L6706 |
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Dynamic VID transitions
L6706
28/47
Doc ID 15698 Rev 2
12
Dynamic VID transitions
The device is able to manage dynamic VID code changes that allow output voltage
modification during normal device operation.
OVP and UVP signals are masked during every VID transition and they are re-activated
after the transition finishes with a 15 s (typ) delay to prevent from false triggering due to the
transition.
When changing dynamically the regulated voltage (D-VID), the system needs to charge or
discharge the output capacitor accordingly. This means that an extra-current ID-VID needs to
be delivered, especially when increasing the output regulated voltage and it must be
considered when setting the over current threshold.
This current can be estimated using the following relationships:
where dVOUT is the selected DAC LSB (6.25 mV for VR11.1) and TVID is the time interval
between each LSB transition (externally driven).
Overcoming the OC threshold during the dynamic VID causes the device to enter the
constant current limitation slowing down the output voltage dV/dt also causing the failure in
the D-VID test. In order to avoid this situation the device automatically increases the OCP
threshold to 150% of the selected OCP threshold during every VID transition (adding an
extra 15 s of delay).
L6706 checks for VID code modifications (see Figure 12) on the rising edge of an internal
additional DVID-clock and waits for a confirmation on the following falling edge. Once the
new code is stable, on the next rising edge, the reference starts stepping up or down in LSB
increments every VID-clock cycle until the new VID code is reached. During the transition,
VID code changes are ignored; the device re-starts monitoring VID after the transition has
finished on the next rising edge available. VID-clock frequency (FDVID) is in the range of 1.8
MHz to assure compatibility with the specifications.
Note:
If the new VID code is more than 1 LSB different from the previous, the device will execute
the transition stepping the reference with the DVID-clock frequency FDVID until the new code
has reached: for this reason it is recommended to carefully control the VID change rate in
order to carefully control the slope of the output voltage.
I
DVID
–
C
OUT
dV
OUT
dT
VID
------------------
=
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相关代理商/技术参数 |
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| L6706TR | 功能描述:DC/DC 开关控制器 VR11.1 SINGLE PHASE CNTRL W/INT DRI RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6709 | 功能描述:功率驱动器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| L6709TR | 功能描述:功率驱动器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| L6710 | 功能描述:功率驱动器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| L6710TR | 功能描述:功率驱动器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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