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參數(shù)資料
| 型號： | L6716 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFP-48 |
| 文件頁數(shù)： | 35/57頁 |
| 文件大?。?/td> | 829K |
| 代理商： | L6716 |
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Output voltage monitor and protections
L6716
40/57
Doc ID 14521 Rev 3
18.3
Overvoltage and programmable OVP
Once VCC crosses the turn-ON threshold and the device is enabled (OUTEN = 1), L6716
provides an overvoltage protection: when the voltage sensed by VSEN overcomes the OVP
threshold (OVPTH), the controller:
●
Permanently turns OFF all the high-side MOSFETs.
●
Permanently turns ON all the low-side MOSFETs (PWM4 is forced low when external
driver is used) in order to protect the load.
●
Drives the OSC/ FAULT pin high (3.3 V typ).
●
Power supply or OUTEN pin cycling is required to restart operations.
The OVP threshold can be also programmed through the OVP pin: leaving the pin floating, it
is internally pulled-up and the OVP threshold is set to VID+150 mV (typ).
Connecting the OVP pin to SGND through a resistor ROVP, the OVP threshold becomes the
voltage present at the pin. Since the OVP pin sources a constant IOVP = 20 A current (see
Table 5), the programmed voltage becomes:
Filter OVP pin with 100 pF (max) vs. SGND.
Overvoltage protections is always active during the soft-start, as shown in the following
picture:
Figure 24.
OVP threshold during soft-start for tracking (left) and fixed (right) mode
Note:
When VR10/VR11 table is selected (OVP pin to SGND) the OVP threshold becomes 1.800
V (typ) fixed.
Table 9.
Overvoltage protection threshold
OVP pin
Thresholds
OVP threshold
Floating
Tracking
OVPTH = VID + 175 mV (typ)
ROVP to SGND
Fixed
OVPTH = ROVP * 20 μA (typ)
OVP
TH
R
OVP
20
μA
=
R
OVP
TH
20
μA
--------------------
=
OUTEN
SS_END
VOUT
t
1.240V
t
OVPTH
VID+175mV
OUTEN
SS_END
VOUT
t
ROVP * 20uA
t
OVPTH
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6716TR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2/3/4 phase CNTRL Embedded Drivers RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝: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 |
| 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:開關(guān)變換器、穩(wěn)壓器與控制器 High-Efficienc AM2r2 Hybrid Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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