Diodes AM4964 - Manual (Page 13)

AM4964
Document number: DS37241 Rev. 2 - 2
13 of 21
www.diodes.com
June 2014
© Diodes Incorporated
AM4964
A Product Line of
Diodes Incorporated
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Applications Note
Typical application circuit for PWM input signal for speed control with AM4964 is shown below. The speed is primarily controlled by a voltage on
the CF pin (either from DC voltage signal or PWM inputs signal converted to DC voltage).
OUT2
OUT1
VCC
CT
VMIN
RADJ
PWM
IN-
CF
FG
IN+
RT
TH
Hall
A
M
4
9
6
4
D1
C1
1

F
R2
VCC
L1
C3
1  F
0.47

F
3
R3
R4
V+
R5
R6
V+
4
5
6
7
8
9
11
13
14
15
17
18
R1
RT
C2
R9
SGND
16
HB
R7
D2
PGND
NC NC
TA
1
2
10
R8
TL
12
19
D3
20
note7
Typical Application Circuit (External PWM Input Speed Control)
Note 7: C1 is for power stabilization and should be 1 μF or higher depending on the motor current and motor design.