Diodes AM4961A - Manual (Page 3)

AM4961A
Document number: DS36626 Rev. 1 - 2
3 of 17
www.diodes.com
October 2013
© Diodes Incorporated
AM4961A
A Product Line of
Diodes Incorporated
NE
W
P
R
OD
UC
T
Functional Block Diagram
Lock Shutdown
and
Auto Restart
Voltage
Reference
Hall Bias
Thermal Shutdown
Hysteresis Amp
Control
Circuit
Oscillation Circuit
CT
VCC
VREF
HB
HIN +
HIN -
VMIN
VPWM
COSC
GND PGND
OUT1
OUT2
RD
FG
2 (3)
11 (12)
9 (10)
8 (9)
10 (11)
3 (4)
4 (5)
5 (6)
13 (14) (16)
14 (15)
1 (1)
7 (8)
6 (7)
12 (13)
Pre - driver
20
Ω
20
Ω
A (B): A for HTSSOP-14 pins B for SSOP-16 pins
Truth Table
HIN- HIN+ COSC (Note 5) CT OUT1 OUT2 FG RD Mode
H L
H
L
H L L
L
Rotation (Drive)
L H L H OFF
H L
L
OFF L L
Rotation (Recirculate)
L H L OFF OFF
H L
H
H
H OFF L
OFF Lock Protection
L H OFF H OFF
H L
L
OFF OFF L
L H OFF OFF OFF
Note: 5. V OSC (H)>V PWM , V OSC (L) PWM .