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参数资料
| 型号： | L6714 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| 封装： | 10 X 10 MM, LEAD FREE, TQFP-64 |
| 文件页数： | 38/70页 |
| 文件大小： | 694K |
| 代理商： | L6714 |
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L6714
Soft start
43/70
15.1
Intel mode
Once L6714 receives all the correct supplies and enables, and Intel Mode has been
selected, it initiates the Soft-Start phase with a T1 = 1ms(min) delay. After that, the reference
ramps up to VBOOT = 1.081V (1.100V - 19mV) in T2 according to the SSOSC settings and
waits for T3 = 75sec(typ) during which the device reads the VID lines. Output voltage will
SSOSC defines the frequency of an internal additional Soft-Start-oscillator used to step the
reference from zero up to the programmed value; this oscillator is independent from the
main oscillator whose frequency is programmed through the OSC pin. SSOSC sets then the
Output Voltage dV/dt during Soft-Start according to the resistor RSSOSC connected vs.
SGND. In particular, it allows to precisely programming the start-up time up to VBOOT (T2)
since it is a fixed voltage independent by the programmed VID. Total Soft-Start time
dependence on the programmed VID results (See Figure 15):
where TSS is the time spent to reach the programmed voltage VSS and RSSOSC the resistor
connected between SSOSC and SGND in k
.
Protections are active during Soft-Start, UVP is enabled after the reference reaches 0.6V
while OVP is always active with a fixed 1.24V threshold before VBOOT and with the threshold
coming from the VID (or the programmed VOVP) after VBOOT (See red-dashed line in
Note:
If during T3 the programmed VID selects an output voltage lower than VBOOT, the output
voltage will ramp to the programmed voltage starting from VBOOT.
R
SSOSC k
[]
T
2 s
[] 4.9783 10
2
–
=
T
SS s
[]
1075
s
[]
R
SSOSC k
[]
5.3816
10
2
–
-------------------------------------
V
SS
if V
SS
V
BOOT
>
()
R
SSOSC k
[]
5.3816
10
2
–
-------------------------------------
V
BOOT
V
BOOT
V
SS
–
()
+
[]
if V
SS
V
BOOT
<
()
+
=
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相关代理商/技术参数 |
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|---|---|
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| L6716 | 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Quad-OUT Sync Step Down 48-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:2/3/4 Phase Controlr Embedded Driver |
| L6716TR | 功能描述:开关变换器、稳压器与控制器 2/3/4 phase CNTRL Embedded Drivers 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 |
| L6717 | 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN 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 |
| 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 |
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