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TS19450 Folha de dados(PDF) 3 Page - Taiwan Semiconductor Company, Ltd

Nome de Peças TS19450
Descrição Electrónicos  AC/DC WLED Driver with External MOSFET Universal High Brightness
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Fabricante Electrônico  TSC [Taiwan Semiconductor Company, Ltd]
Página de início  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS19450 Folha de dados(HTML) 3 Page - Taiwan Semiconductor Company, Ltd

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TS19450
AC/DC WLED Driver with External MOSFET
Universal High Brightness
3/8
Version: A10
Block Diagram
Pin Description
Pin
Function
Description
1
VIN
This pin is the input of 8V~450V linear regulator
2
CS
This pin is the current sense pin used to sense the MOSFET current by means of an
external sense resistor. When this pin exceeds the low of either the internal 250mV
or the voltage at the LD pin, the GATE output goes low
3
GND
Ground return for all internal circuitry. This pin must be electrically connected to the
ground of the power train.
4
GATE
This pin is the output GATE driver for an external N-CH Power MOSFET
5
PWMD
This is the PWM dimming input of the IC. When this pin is pulled to GND, the Gate
Driver is turned off. When the pin is pulled high, the GATE driver operates normally.
6
VDD
This is the power supply pin for all internal circuits.
It must be bypassed with a low ESR capacitor to GND (≥0.1µF)
7
LD
This pin is the linear dimming input and sets the current sense threshold as long as
the voltage at the pin is less than 250mV (typ.)
8
RT
This pin sets the oscillator frequency. When a resistor is connected between RT and
GND, the IC operates in constant frequency mode. When the resistor is connected
between RT and GATE, the IC operates in constant off-time mode.


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