Diodes AM4962 - Manual (Page 4)

Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
4
Functional Block Diagram
Lock Shutdown
and
Auto Restart
Hall
Bias
Thermal
Shutdown
Hysteresis Amp
Control
Circuit
Triangle Wave
CT
VCC
RADJ
HB
HIN+
HIN-
VMIN
PWM
CF
GND PGND
OUT1
OUT2
RD
FG
1 (1)
Pre-
driver
V+
2 (3)
3 (4)
4 (5)
5 (6)
6 (7)
7 (8)
8 (9)
9 (10)
10 (11)
11 (12)
12 (13) 13 (14)
14 (15)
(16)
V+ V+
V+
104k
42k
90k
54k
51k
56k
93k
18k
A (B)
A HTSSOP-14
B SSOP-16
Figure 3. Functional Block Diagram of AM4962
Truth Table (Note 1)
Items IN- IN+ CF CT OUT1 OUT2 FG Mode
1 H L H L L Rotation
2 L H
L
L H Off PWM off
3 H L Off L L
Rotation Recirculate
4 L H
H
L
L Off Off PWM off
5 H L H Off L
6 L H
L H
Off H Off
Lock Protection
Note 1: V
CF
(H)=5V, V
CF
(L) =1V, V
CT
(H)=5V, V
CT
(L) =0