YB1520 Просмотр технического описания (PDF) - YOBON TECHNOLOGIES,INC.

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YB1520

Step-up DC-DC Converter, White LED Driver

YOBON TECHNOLOGIES,INC. 

YB1520

Step-up DC-DC Converter, White LED Driver

The input bypass capacitor CIN, as shown

in Figure 1, must be placed close to the IC.

This will reduce copper trace resistance

which affects input voltage ripple of the IC.

For additional input voltage filtering, a

100nF bypass capacitor can be placed in

parallel with CIN to shunt any high

frequency noise to ground. The output

capacitor, COUT, should also be placed

close to the IC. Any copper trace

connections for the COUT capacitor can

increase the series resistance, which

directly effect output voltage ripple.

The feedback network, resister R2 should

be kept close to the FB pin to minimize

copper trace connections that can inject

noise into the system. The ground

connection for the feedback resistor

network should connect directly to an

analog ground plane. The analog ground

plane should tie directly to the GND pin. If

no analog ground plane is available, the

ground connection for the feedback

network should tie directly to the GND pin.

Trace connections made to the inductor

and Schottky diode should be minimized to

reduce power dissipation and increase

overall efficiency.

YB1520 Rev.1.4

www.yobon.com.tw

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