LB8503V Datasheet, PDF (19/20 Pages) Sanyo Semicon Device – Monolithic Digital IC DC Fan Motor Speed Control IC

LB8503V
Application Example 7
[Used in Combination with the LB11660FV]
12V
C4
C5
R3
C3
R1
C6
R2
C1
R4
R5
CTL
signal
LB8503V
VCC ^VREG
6VREG
EDGE
One-shot
RC
multivibrator
FGOUT
VREG
FG
FGIN
LIM
SOFT
CVI
CVO
VREF
VREG
EI
C2
EO1
C
CTL
CTL
GND
EO3
LB11660FV/RV
FG
VTH
In this circuit, the dynamic range of the LB8503V EO pin (the range from the amplifier block output high to output low
levels) must be wider than the dynamic range (from the high to low levels of the PWM signal) of VTH pin of driver IC
with which this IC is combined.
However, since the LB11660FV PWM low-level voltage is lower than the LB8503V amplifier output low-level
voltage, it must be resistor divided.
No.A0366-19/20