参数资料
型号: NCP1605LCDTVGEVB
厂商: ON Semiconductor
文件页数: 18/30页
文件大小: 0K
描述: BOARD EVAL NCP1605/1396
设计资源: NCP1605LCDTVGEVB Schematic
NCP1605LCDTVGEVB Gerber Files
NCP1605LCDTVGEVB Bill of Materials
标准包装: 1
系列: *
NCP1027
V CC
Vbulk
+
20 m s
RC
To permanent
-
latch
Vout
Q1
NTC
Rupper
BO
Rlower
+
Vlatch
IBO
+
-
V DD
BO
+
VBO
Figure 32. Adding a comparator on the BO pin offers a way to latch-off the controller.
In Figure 32, Q1 is blocked and does not bother the BO
measurement as long as the NTC and the optocoupler are
not activated. As soon as the secondary optocoupler senses
temperature, Q1 base is brought to ground and the BO pin
goes up, permanently latching off the controller. Figure 33
depicts the converter behavior in case of total latch-off.
an OVP condition, or the NTC reacts to a high ambient
Figure 33. If the BO pin is lifted up to VLATCH, the controller permanently latches off.
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