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TS19373CX5RF データシート(PDF) 3 Page - Taiwan Semiconductor Company, Ltd

部品番号 TS19373CX5RF
部品情報  800mA Buck (Step-down) WLED Driver
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メーカー  TSC [Taiwan Semiconductor Company, Ltd]
ホームページ  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS19373CX5RF データシート(HTML) 3 Page - Taiwan Semiconductor Company, Ltd

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TS19373
800mA Buck (Step-down) WLED Driver
3/9
Version: B09
Application Information
Pin Description
Pin
Function
Description
1
VIN
Input Voltage Supply pin
2
Ground
Ground Pin
3
Timing Capacitor
Timing capacitor oscillator input
4
ISENSE
Peak current sense input to monitor the voltage drop across an external
resistor to limit the peak current through the circuit
5
SW
Switching Pin. This is the internal Darlington switch collector
Inductor Selection
A 100uH inductor is recommended for most TS19373 applications. Although small size and high efficiency are major
concerns, the inductor should have low core losses at 180kHz and low DCR (copper wire resistance).
Diode Selection
Schottky diodes, with their low forward voltage drop and fast reverse recovery, are the ideal choices for TS19373
applications. The forward voltage drop of a Schottky diode represents the conduction losses in the diode while the
diode capacitance represents the switching losses. For diode selection, both forward voltage drop and diode
capacitance need to be considered. Schottky diodes with higher current ratings usually have lower forward voltage
drop and larger diode capacitance, which can cause significant switching losses at the 180kHz switching frequency of
the TS19373.
Capacitor Selection
For Input capacitor and timing capacitor are able to use small ceramic capacitor for most of TS19373 applications.
When AC input, to add a 100µF electric capacitor for input capacitor is recommended.


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