Power Supply Circuit - Panasonic F77G User Manual

Chapter 1 Overview
1-6-4

Power Supply Circuit

Cautions for Setting Power Supply Circuit
The CMOS logic microcontroller is high speed and high density. So, the power circuit should be de-
signed, taking into consideration of AC line noise, ripple caused by LED driver. Figure 1-6-6 shows an
example for emitter follower type power supply circuit.
An example for Emitter Follower Type Power Supply Circuit
For Noise-filter
Figure 1-6-6 An Example for Emitter follower type Power Supply Circuit
I - 32
Precautions
Set condensors for noise-filter near
microcontroller power pins.
V
DD
+
Microcontroller
LED port
V
SS
LED