Diodes AM4962 User Manual
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Data Sheet
General Description
The AM4962 is a full wave driver IC with direct
PWM control function. It is used for single phase
motor and is capable of speed control by PWM pulse.
The AM4962 is available in HTSSOP-14 and
SSOP-16 packages.
Features
The Motor Speed is Controlled by PWM Pulse
•
Directly
• Built-in Triangle Wave Circuit Without Extra
Oscillation Capacitor
• Built-in Hall Bias Circuit
• Built-in Minimal Speed Setup Circuit
• Slope K* Adjustable
• Rotation Speed Indication (FG)
• Rotation or Lock State Indication (RD)
• Built-in Thermal Shutdown Circuit
• Lock Protection and Auto-restart
• Output Current Limit
* Slope K is the slope of output PWM duty vs. input
PWM duty
Applications
• CPU Cooler Fan in PC
• Brushless DC Motor Driver
HTSSOP-14 SSOP-16
Figure 1. Package Types of AM4962
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Pin Configuration
GH Package
(HTSSOP-14)
PGND
OUT2
VCC
VMIN
PWM
CF
FG
RD
1
2
3
4
5
6
7
GS Package
(SSOP-16)
OUT2
NC
VCC
VMIN
PWM
CF
FG
RD
Figure 2. Pin Configuration of AM4962 (Top View)
1
2
3
4
5
6
7
8
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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14
13
12
11
10
9
8
16
15
14
13
12
11
10
9
PGND
OUT1
GND
CT
RADJ
HIN-
HB
HIN+
PGND
OUT1
GND
CT
RADJ
HIN-
HB
HIN+
Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Pin Description
Pin Number
HTSSOP-14 SSOP-16
Pin Name Function
1 1
2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11
11 12
12 13
13 14
OUT2 Driver output 2
NC No connection
VCC Power supply
VMIN Minimum duty setting
PWM PWM pulse Input
CF PWM filter capacitor
FG Rotation speed indicator
RD Rotation/lock state indicator
HIN+ Hall sensor input +
HB Hall sensor bias regulator
HIN- Hall sensor input -
RADJ Slope K adjustable terminal
CT Lock and rotation setting capacitor terminal
GND Ground for control circuit
14 15
16
OUT1 Driver output 1
PGND Power ground
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Functional Block Diagram
VMIN
RADJ
PWM
CF
HB
HIN+
HIN-
V+
3 (4)
11 (12)
V+
4 (5)
5 (6)
9 (10)
8 (9)
10 (11)
104k
42k
90k
54k
V+
V+
51k
56k
Hall
Bias
Hysteresis Amp
Triangle Wave
93k
18k
Control
Circuit
Lock Shutdown
and
Auto Restart
12 (13) 13 (14)
CT
Thermal
Shutdown
Pre-
driver
(16)
GND PGND
6 (7)
7 (8)
2 (3)
1 (1)
14 (15)
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
FG
RD
VCC
OUT2
OUT1
1 H L H L L Rotation
L
2 L H
L H Off PWM off
L
3 H L Off L L
H
4 L H
L Off Off PWM off
Rotation Recirculate
5 H L H Off L
6 L H
L H
Off H Off
Lock Protection
Note 1: VCF(H)=5V, VCF(L) =1V, VCT(H)=5V, VCT(L) =0
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Ordering Information
AM4962 -
Circuit Type G1: Green
Package
HTSSOP-14
SSOP-16
Package
GH: HTSSOP-14
GS: SSOP-16
Temperature
Range
-30 to 90°C
Part Number Marking ID
AM4962GH-G1 AM4962GH-G1
AM4962GHTR-G1 AM4962GH-G1
AM4962GS-G1 AM4962GS-G1
AM4962GSTR-G1 AM4962GS-G1
Blank: Tube
TR: Tape & Reel
Packing
Type
Tube
Tape & Reel
Tube
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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