参数资料
型号: L6722TR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, QCC36
封装: 6 X 6 MM, 1 MM PITCH, VFQFPN-36
文件页数: 16/34页
文件大小: 421K
代理商: L6722TR
Obsolete
Product(s)
- Obsolete
Product(s)
L6722
9 Output voltage monitor and protections
23/34
Figure 12. output voltage protections and typical principle connections
9.4
Feedback disconnection
Output voltage i monitored by the device in two different points:
Remotely, through the remote buffer, across VSEN
Locally across the CS- pin (negligibly offset by
).
By comparing the voltage present at these two different locations, L6722 is able to understand
if the output voltage feedback is connected. When CS- is more than 1.375V higher than VSEN,
(See Figure 13) the device stops switching with the low side mosfets permanently ON and
drives high the FAULT pin. The condition is latched until VCC or INH cycled.
Figure 13. Feedback disconnection
VCC
+12V
+5V
SB
Vcc
UVLO
OVP
UVLO
VCC
Preliminary OVP Enabled
FBR Monitored
No Protection
Provided
(INH = Free)
OVP Protection
VSEN Monitored
(INH = 0)
Preliminary OVP
FBR Monitor
R
D
I
CS
L2
L1
L3
DCR1
DCR2
DCR3
CD
RD
RD RD
RG
PHASE3
PHASE2
PHASE1
VOUT
IINFO
CS_DROOP+
CS_DROOP-
FB
IDROOP
x 3
RF
CF
RFB
COMP
VSEN
FBR
FBG
VID
FB_DISCONNECTED
1V
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相关代理商/技术参数
参数描述
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L6725ATR 功能描述:开关变换器、稳压器与控制器 Step-Down 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
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