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TS19702 Folha de dados(PDF) 5 Page - Taiwan Semiconductor Company, Ltd

Nome de Peças TS19702
Descrição Electrónicos  High Power Factor Corrector LED Driver
Download  9 Pages
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Fabricante Electrônico  TSC [Taiwan Semiconductor Company, Ltd]
Página de início  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS19702 Folha de dados(HTML) 5 Page - Taiwan Semiconductor Company, Ltd

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TS19702
High Power Factor Corrector LED Driver
5/9
Version: A12
Application Information (Continue)
OCP (Over Current Protection)
The TS19702 has an over current protection function on CS pin. An internal circuit detects the current level, when
the current is larger than a threshold level, the gate output will keep on low level. Then VCC decreases below UVLO
off level, the controller resets again.
OVP (Over Voltage Protection) on VCC
To prevent the LED driver from being damaged, the TS19702 is implemented an OVP function on VCC. When the
VCC voltage is higher than the OVP threshold voltage 28V, the output gate driver circuit will be shut down
immediately to stop the switching of power MOSFET. The VCC pin OVP function is an auto recovery type protection
(latch off type optional). If the OVP condition happens, the pulses will be stopped and never recovery unless the
VCC pin voltage is down to the UVLO off level. The TS19702 is working in an auto-recovery mode as shown in
below figure
Gate Clamp/Soft Driving
Driver is clamped to 15V by an internal clamping circuit. Those damages usually come from undesired over-voltage
gate signals. Under the conditions listed below, the gate output will turn off immediately to protect the power circuit.
The TS19702 also has soft driving function to minimize EMI.
Over Temperature Protection/Dimming Function
The typical application for DIM pin is shown in above Fig. The NTC thermistor is setting as an external OTP
protection. In the DIM pin, there is one comparator for latch-off mode protection. While the voltage on this pin is
lower than 0.3V, the TS19702 will shut down. When the voltage is in the range of 0.3 to 3.0V, the TS19702 is
operating on the linear dimming range. While the voltage is higher than 3.0V, the TS19702 is operating on the
normal status. It also could let this Pin open when the function is not required for the user.


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