Diodes AM4961GS-G1 Single phase full wave direct pwm motor driver Datasheet

Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
General Description
Features
The AM4961 is a full wave driver IC with PWM control function. It is used for single phase motor and is
capable of speed control by changing output duty
cycle.
·
·
·
·
·
·
·
·
The AM4961 is available in SSOP-16 and HTSSOP14 packages.
AM4961
Built-in Hall Bias Circuit
Built-in PWM Speed Control Circuit
Built-in Minimal Speed Setup Circuit
Rotation Speed Indication (FG)
Rotation or Lock State Indication (RD)
Built-in Thermal Shutdown Circuit
Lock Protection
Output Current Limit
Application
·
·
CPU Cooler Fan in PC
Brushless DC Motor Driver
HTSSOP-14
SSOP-16
Figure 1. Package Types of AM4961
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Pin Configuration
GS Package
(SSOP-16)
OUT2
1
16
PGND
NC
2
15
OUT1
VCC
3
14
GND
VMIN
4
13
CT
VPWM
5
12
VREF
COSC
6
11
HIN-
FG
7
10
HB
RD
8
9
HIN+
GH Package
(HTSSOP-14)
PGND
PGND
OUT2
1
14
OUT1
VCC
2
13
GND
VMIN
3
12
CT
VPWM
4
11
VREF
COSC
5
10
HIN-
FG
6
9
HB
RD
7
8
HIN+
Figure 2. Pin Configuration of AM4961 (Top View)
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Pin Description
Pin Number
Pin Name
Function
HTSSOP-14
SSOP-16
1
1
OUT2
Driver output 2
2
NC
No connection
2
3
VCC
Power supply
3
4
VMIN
Minimum duty setting
4
5
VPWM
Adjustable Input
5
6
COSC
Oscillator capacitor
6
7
FG
Rotation speed indicator
7
8
RD
Rotation/lock state indicator
8
9
HIN+
9
10
HB
10
11
HIN-
Hall sensor input -
11
12
VREF
Reference voltage regulator
12
13
CT
13
14
GND
Ground for control circuit
14
15
OUT1
Driver output 1
16
PGND
Power ground
Hall sensor input +
Hall sensor bias regulator
Lock and rotation setting capacitor terminal
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Functional Block Diagram
COSC
VPWM
VMIN
6 (7)
5 (6)
Oscillation Circuit
FG
Thermal Shutdown
4 (5)
7 (8)
3 (4)
RD
Pre-driver
VREF
HB
HIN+
HIN-
11 (12)
9 (10)
Voltage
Reference
2 (3)
VCC
Control
Circuit
Hall Bias
1 (1)
8 (9)
OUT2
10 (11)
Hysteresis Amp
Lock Shutdown
and
Auto Restart
12 (13)
CT
A (B)
A for 14-pin
14 (15)
OUT1
(16)
13 (14)
GND
PGND
B for 16-pin
Figure 3. Functional Block Diagram of AM4961
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Truth Table
HIN-
HIN+
H
L
L
H
H
L
L
H
H
L
L
COSC (Note 1)
H
L
L
H
H
H
L
L
H
CT
H
L
OUT1
OUT2
FG
H
L
L
L
H
OFF
OFF
L
L
L
OFF
OFF
H
OFF
L
OFF
H
OFF
OFF
OFF
L
OFF
OFF
OFF
RD
Mode
Rotation (Drive)
L
Rotation (Recirculate)
OFF
Lock Protection
Note 1: VOSC (H) >VPWM, VOSC (L) <VPWM.
Ordering Information
AM4961
E1: Lead Free
G1: Green
Circuit Type
TR: Tape and Reel
Blank: Tube
Package
GS: SSOP-16
GH: HTSSOP-14
Package
Temperature
Range
SSOP-16
-30 to 90oC
Part Number
Lead Free
Marking ID
Green
Lead Free
Green
Packing
Type
AM4961GS-E1
AM4961GS-G1
AM4961GS
AM4961GS-G1
Tube
AM4961GSTR-E1
AM4961GSTR-G1
AM4961GS
AM4961GS-G1
Tape & Reel
AM4961GH-E1
AM4961GH-G1
AM4961GH
AM4961GH-G1
Tube
AM4961GHTR-E1
AM4961GHTR-G1 AM4961GH
AM4961GH-G1
Tape & Reel
HTSSOP-14
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
May. 2011 Rev. 2. 4
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Absolute Maximum Ratings (Note 2)
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
18
V
Output Current
IOUT
1.0
A
Output Voltage
VOUT
18
V
IHB
10
mA
VPWM
6
V
RD Output Voltage
VRD
18
V
FG Output Voltage
VFG
18
V
RD Output Current
IRD
10
mA
FG Output Current
IFG
10
mA
Power Dissipation (Note 3)
PD
Storage Temperature Range
TSTG
-55 to 150
oC
ESD (Human Body Model)
ESD
2000
V
ESD (Machine Model)
ESD
250
V
HB Output Current
VPWM Input Voltage
SSOP-16
0.8
W
HTSSOP-14
1.1
W
Note 2: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.
Note 3: TA=25oC, no external heatsink.
Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Supply Voltage
VCC
3.5
12
16
V
Hall Input Voltage + (Note 4)
VIN+
0.2
3
V
Hall Input Voltage - (Note 4)
VIN-
0.2
3
V
TA
-30
90
Ambient Temperature
o
C
Note 4: Hall input voltage range includes the amplitude of signal.
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Electrical Characteristics
(VCC=12V, TA=25oC, unless otherwise specified.)
Parameter
Quiescent Current
Symbol
Conditions
Min
Typ
Max
Unit
IQ1
Lock Off
10.2
15
18.76
IQ2
Lock On
5.38
8
10.55
5.8
6
6.2
V
mA
VREF Voltage
VREF
IREF=5mA
Output Saturation Voltage at
High Side
VSATH
ISOURCE=200mA
1.0
1.17
V
Output Saturation Voltage at
Low Side
VSATL
ISINK=200mA
0.2
0.3
V
18
25
32
kHz
COSC Frequency
fOSC
COSC=100pF
COSC High Level Voltage
VOSCH
3.45
3.6
3.75
V
COSC Low Level Voltage
VOSCL
1.83
1.95
2.07
V
Hall Input Hysteresis
VHYS
±10
±20
mV
Hall Bias Voltage
VHB
1.1
1.25
1.4
V
CT High Level Voltage
VCTH
3.55
3.7
3.88
V
CT Low Level Voltage
VCTL
1.55
1.7
1.85
V
CT Charge Current
ICHG
1.5
2
2.85
μA
CT Discharge Current
IDHG
0.14
0.2
0.285
μA
CT Charge and Discharge Ratio
RCD
ICHG/IDHG
8.5
10
14.5
FG Output Low Level Voltage
VFGL
IFG=5mA
0.2
0.3
V
FG Leakage Current
ILFG
VFG=12V
30
μA
RD Output Low Level Voltage
VRDL
IRD=5mA
0.3
V
RD Leakage Current
ILRD
VRD=12V
30
μA
IHB=5mA
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Typical Performance Characteristics
20
20
TA=25 C
Rotation Mode
Rotation Mode
16
12
12
IQ1 (mA)
IQ1 (mA)
16
O
VCC=12V
8
8
4
4
0
-50
0
0
50
100
150
200
4
6
8
10
O
12
14
16
18
VCC (V)
TA ( C)
Figure 4.Quiescent Current vs. Ambient Temperature
Figure 5. Quiescent Current vs. Supply Voltage
2.0
2.0
VCC=12V
VCC=12V
1.5
VSATL (V)
VSATH (V)
1.5
1.0
0.5
0.5
0.0
1.0
0.0
0
200
400
600
800
1000
0
200
400
600
800
1000
IOUT (mA)
IOUT (mA)
Figure 6. Output Saturation Voltage (High) vs. Output Current
May. 2011 Rev. 2. 4
Figure 7. Output Saturation Voltage (Low) vs. Output Current
BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
1.2
1.2
1.0
1.0
0.8
0.8
PD (W)
PD (W)
Typical Performance Characteristics (Continued)
0.6
0.4
0.2
0.6
0.4
Package: SSOP-16
No External Heatsink
0.2
0.0
-20
0
20
40
60
80
90 100
0.0
120
O
TA ( C)
Package: HTSSOP-14
No External Heatsink
-20
0
20
40
60
80
90 100
O
TA ( C)
Figure 9. Power Dissipation vs. Ambient Temperature
Figure 8. Power Dissipation vs. Ambient Temperature
May. 2011 Rev. 2. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Operating Diagram
VPWM adjustable Voltage
Lowest speed setting voltage
fOSC=25kHz (COSC=100pF)
Vosc
VMIN Voltage
COSC Output
Vosc
Low Speed
PWM Variable
High Speed
VCC
0V
FG Output
Figure 10. Operating Diagram of AM4961 (Note 5)
Note 5:
1. Low Speed Setting Mode
M
When VPWM voltage is higher than VMIN pin voltage,
motor speed is settable by VMIN pin voltage. The minimum drive duty cycle is settable by comparing COSC
oscillating voltage and VMIN pin voltage.
VPWM voltage is decided by variation of PWM duty.
At a certain PWN duty, when VPWM voltage is lower than
the low side of COSC output voltage, the motor will run at
full speed.
2. Variable Speed Setting Mode
When VPWM voltage is lower than VMIN pin voltage,
PWM control system works by comparing VPWM voltage
and COSC voltage. If VPWM voltage is higher, the ON
duty cycle of the upper side transistors will be minimized
and motor speed becomes lower. Vice versa.
3. Full Speed Rotation Mode
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Typical Application
D1
VCC
R1
27k
C1
1μF or greater
L1
AM4961
R2
10k
1 (1)
2 (3)
3 (4)
R4
39k
4 (5)
R6 330k
PWM
5 (6)
R3 7.5k
6 (7)
7 (8)
OUT2
OUT1
VCC
GND
VMIN
CT
VPWM
14 (15)
13 (14)
12 (13)
VREF
11 (12)
HIN-
10 (11)
COSC
FG
HB
RD PGND HIN+
9 (10)
8 (9)
Hall
C4
0.47μF
(16)
R7
100k
C2
0.33μF
R8
R5
C3
100pF
68k
100k
Figure 11. Typical Application of AM4961 (Note 6)
Note 6:
When CCP is 100pF, the COSC frequency will be 25kHz.
*1. Ground Line Layout
*5. FG Output
PGND is connected to motor supply stage and GND is
connected to control stage. All ground lines from control
stage are connected to GND.
FG output terminal is open collector output which varies
with phase change.
*6. RD Output
*2. Stability of Power Supply
RD output terminal is open collector output. It is low at
rotation mode and high when stopped.
C1 is employed to stabilize VCC. Its capacitance is no less
than 1μF.
*7. HB Pin
*3. Hall Input
This pin is available to output a 1.25V Hall bias voltage.
To avoid noise, the shortest line is recommended to connect with Hall stage which has about 20mV hysteresis.
Thus, the ideal Hall input is 50mV or over.
*8. VMIN Pin
If this pin is disused, connect it directly with VPWM, the
minimum duty cycle will be 10%.
*4. COSC Capacitor
May. 2011 Rev. 2. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Mechanical Dimensions
SSOP-16
Unit: mm(inch)
3.800(0.150)
4.000(0.157)
7°
0.200(0.008)
0.300(0.012)
7°
0.635(0.025)
BSC
4.700(0.185)
5.100(0.201)
Φ 0.800(0.031)
1.000(0.039)
0.100(0.004)
0.900(0.035)
0.250(0.010)
1.350(0.053)
1.750(0.069)
0.400(0.016)
1.270(0.050)
5.800(0.228)
6.200(0.244)
8°
SEE
DETAIL A
1.350(0.053)
1.550(0.061)
0.150(0.006)
0°
R0.150(0.006)
0.250(0.010)
8°
0.250(0.010)
R0.150(0.006)
8°
0.650(0.026)
0.200(0.008)
0.750(0.030)
0.250(0.010)
0.020(0.001)
0.050(0.002)
Note: Eject hole, oriented hole and mold mark is optional.
DETAIL A
May. 2011 Rev. 2. 4
BCD Semiconductor Manufacturing Limited
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Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
AM4961
Mechanical Dimensions (Continued)
HTSSOP-14
Unit: mm(inch)
1. 470(0. 058)
1. 570(0. 062)
6. 350(0. 250)
6. 550(0. 258)
Φٛ
1. 450(0. 057)
1. 550(0. 061)
6. 200(0. 244)
6. 600(0. 260)
4. 300(0. 169)
4. 500(0. 177)
SEE
DETAIL A
Φ
ٛ 0. 750(0. 030)
0. 850(0. 033)
0.200(0.008) or 1.480(0.058)
0.280(0.011) or 1.610(0.063)
0.100(0.004)
0.190(0.007)
0. 650(0. 026)
BSC
1. 300(0. 051)
BSC
1. 200(0. 047)
MAX
0. 340(0. 013)
0. 200(0. 008)
MIN
10°
14 °
R0. 090(0. 004)
MIN
BASE METAL
0.100(0.004)
0.150(0.006)
0.200(0.008) or 1.470(0.058)
0.240(0.009) or 1.570(0.062)
R0. 090(0. 004)
MIN
0. 540(0. 021)
0. 250(0. 010)
BSC
0.050(0. 002)
0.200(0. 008)
0°
8°
0. 450(0. 018)
0. 750(0. 030)
0.900(0. 035)
1.050(0. 041)
1. 000(0. 039)
REF
DETAIL A
Note: Eject hole, oriented hole and mold mark is optional.
May. 2011 Rev. 2. 4
BCD Semiconductor Manufacturing Limited
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