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参数资料
| 型号： | L6717 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48 |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFPN-48 |
| 文件页数： | 32/56页 |
| 文件大小： | 1081K |
| 代理商： | L6717 |
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Output voltage positioning
L6717
38/56
Doc ID 17326 Rev 1
command (kDRPNB). RFB_NB gives the final gain to program the desired load-line slope
The output characteristic vs. load current is then given by:
Where RLL_NB is the resulting Load-Line resistance implemented by the NB Section.
kDRPNB value is determined by the Power Manager I
2C and its default value is 1/4.
RFB_NB resistor can be then designed according to the RLL_NB specifications and DRP_ADJ
setting as follow:
7.7
On-the-fly VID transitions
L6717 manages on-the-fly VID Transitions that allow the output voltage of both sections to
modify during normal device operation for CPU power management purposes. OV, UV and
PWRGOOD signals are masked during every OTF-VID Transition and they are re-activated
with a 16 clock cycle delay to prevent from false triggering.
When changing dynamically the regulated voltage (OTF-VID), the system needs to charge
or discharge the output capacitor accordingly. This means that an extra-current IOTF-VID
needs to be delivered (especially when increasing the output regulated voltage) and it must
be considered when setting the over current threshold of both the sections. This current
results:
where dVOUT / dTVID depends on the operative mode (3mV/μsec. in SVI or externally driven
in PVI).
Overcoming the OC threshold during the dynamic VID causes the device latch and disable.
Dynamic VID transition is managed in different ways according to the device operative
mode:
●
PVI mode.
L6717 checks for VID code modifications (See Figure 11) on the rising-edge of an
internal additional OTFVID-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 two OTFVID-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. OTFVID-clock frequency (FOTFVID) is 500 kHz.
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 OTFVID-clock frequency FOTFVID
V
OUT_NB=VID
R
FB_NB
k
DRPNB
I
DROOP_NB
–
VID
R
FB_NB
k
DRPNB
DCR NB
()
R
G_NB
--------------------------- I
OUT
–
VID
R
LL_NB
I
OUT_NB
–
=
R
FB_NB
R
LL_NB
k
DRPNB
---------------------
R
G_NB
DCR NB
()
---------------------------
=
I
OTF-VID
C
OUT
dV
OUT
dT
VID
------------------
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6717A | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717ATR | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller T/R 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Tape and Reel 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717TR | 功能描述:开关变换器、稳压器与控制器 High-Efficienc AM2r2 Hybrid Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6718TR | 功能描述:其他电源管理 Multiphase Dual PWM VR12 25MHz LTB RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| L6720 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
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