- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97995 > L6711 (STMICROELECTRONICS) 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 PDF資料下載
參數(shù)資料
| 型號： | L6711 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, TQFP-48 |
| 文件頁數(shù)： | 27/50頁 |
| 文件大?。?/td> | 679K |
| 代理商： | L6711 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
Obsolete
Product(s)
- Obsolete
Product(s)
L6711
Output voltage monitor and protections
33/50
14
Output voltage monitor and protections
The device monitors through pin VSEN the regulated voltage in order to manage the OVP /
UVP conditions.
14.1
UVP protection
If the output voltage monitored by VSEN drops below the 60% of the reference voltage for
more than one clock period, the device turns off all mosfets and the OSC/FAULT is driven
high (5V). The condition is latched; to recover it is required to cycle Vcc or the OUTEN pin.
14.2
Programmable OVP protection
Once VCC crosses the turn-ON threshold and the device is enabled (OUTEN = 1), the
device provides a programmable Over Voltage protection; when the voltage sensed
overcomes the programmed threshold, the controller permanently switches on all the low-
side mosfets and switches off all the high-side mosfets in order to protect the load. The
OSC/ FAULT pin is driven high (5V) and power supply or OUTEN pin cycling is required to
restart operations.
The OVP threshold is programmed through the OVP pin: leaving the pin floating, it is
internally pulled-up and the threshold is set at 115% (Typ.) of the programmed output
voltage. Connecting the OVP pin to SGND through a resistor ROVP, the OVP threshold
becomes a fixed voltage as follow:
OVPTH = 1.455 ROVP 12.5
14.3
Preliminary OVP protection (Pre-OVP)
While VCC pin is under the turn-ON threshold, a preliminary-OVP protection turns on the
low side mosfets as long as the FBR pin voltage is greater than 1.8V. This protection is
enabled when VCC stays within the device turn-on threshold and the PreOVP turn on
threshold and depends also on the OUTEN pin status as detailed in Figure 16 - left.
A simple way to provide protection to the output in all conditions when the device is OFF
(then avoiding the unprotected red region in Figure 16) consists in supplying the controller
Both Over Voltage and Under Voltage are active also during soft start (see the relevant
section).
相關PDF資料 |
PDF描述 |
|---|---|
| L6714TR | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6714 | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6725TR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6728ATR | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728A | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 開關控制器 3 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| L6712 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復。