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Part NameDescriptionManufacturer
YB1506 Step-up DC-DC Converter , White LED Driver YOBON
YB1506 Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
Step-up DC-DC Converter , White LED Driver
Diode selection
effect input voltage ripple of the IC. For
To maintain high efficiency, the average additional input voltage filtering, a
current rating of the schottky diode should 100nF bypass capacitor can be placed
be large than the peak inductor current, IPK. in parallel with Cin to shunt any high
Schottky diode with a low forward drop and frequency noise to ground. The output
fast switching speeds are ideal for increase capacitor, Cout, should also be placed
efficiency in portable application. Choose a close to the IC. Any copper trace
reverse breakdown of the schottky diode connections for the Cout capacitor can
large than the output voltage.
increase the series resistance,
which directly effect output voltage
Capacitor selection
ripple. The feedback network, resister
R2 should be kept close to the FB pin to
minimize copper trace connections that
Choose low ESR capacitors for the output to can inject noise into the system. The
minimize output voltage ripple. Multilayer ground connection for the feedback
capacitors are a good choice for this as well. resistor network should connect directly
A 4.7uF capacitor is sufficient for most to an analog ground plane. The analog
applications. For additional bypassing, a ground plane should tie directly to the
100nF ceramic capacitor can be used to GND pin. If no analog ground plane is
shunt high frequency ripple on the input.
available, the ground connection for the
feedback network should tie directly to
Layout consideration
the GND pin. Trace connections made
The input bypass capacitor Cin, as shown in to the inductor and schottky diode
Figure 1, must be placed close to the IC. should be minimized to reduce power
This will reduce copper trace resistance dissipation and increase overall
Figure 420V Application
YB1506 MRev1.1
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