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TS19378CSRLG Folha de dados(PDF) 4 Page - Taiwan Semiconductor Company, Ltd

Nome de Peças TS19378CSRLG
Descrição Electrónicos  2A Buck (Step-down) WLED Driver
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Fabricante Electrônico  TSC [Taiwan Semiconductor Company, Ltd]
Página de início  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS19378CSRLG Folha de dados(HTML) 4 Page - Taiwan Semiconductor Company, Ltd

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TS19378
Taiwan Semiconductor
Document Number: DS_P0000199
4
Version: B15
TYPICAL APPLICATION CIRCUIT
AC Input Application Circuit
ILED
R5
C1
L1
350mA
0.570Ω
70mW
100μF
33μH
750mA
0.266Ω
150mW
220μF
1000mA
0.200Ω
200mW
330μF
APPLICATION INFORMATION
PWM Control
The TS19378 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of
the TS19378, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage
produced by the switching can easily be removed through a filter because the switching frequency remains constant.
Therefore, these converters provide a low-ripple power over broad ranges of input voltage and load current
Setting ILED Current
Application circuit item shows the basic application circuit with TS19378 adjustable output version. The external
resistor sets the LED output current according to the following formula:
ILED=(0.25V/R5), VFB=0.2V
Resistor select for LED output current setting
ILED
R2
350mA
0.57Ω
70mW
750mA
0.266Ω
150mW
1000mA
0.2Ω
200mW
Current Limit
The current limit threshold is setting by the internal circuit.
Compensation
In all LED driver applications. Connecting a resistor (R2) and a capacitor (C7) from COMP pin to GND. Please
refer the application circuit table to design.


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