Data Sheet General Description Features Application

Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
General Description
Features
The AM4967 is a single-coil, single-phase motor predriver designed by bipolar process. Its rotation speed
can be controlled through an external PWM. This IC
requires few external components and has the merit of
high efficiency which make it suitable for use in great
air volume, large current and high voltage applications.
·
·
·
·
·
·
·
·
The AM4967 is available in SSOP-16 package.
AM4967
Single-phase Full-wave Pre-drive
Rotation Speed Control via External PWM
Maximum Operating Current Limit
Linear Start Function for Reducing Large Current
Impulse at the Moment of Turn-on
Minimum Rotation Speed Setting
Lock Protection and Auto Start Function
Rotation Speed Indication
Over Temperature Protection
Application
·
·
CPU and OA (Office Automation) Cooler Fan
Brushless DC Motor
SSOP-16
Figure 1. Package Type of AM4967
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
1
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Pin Configuration
GS Package
(SSOP-16)
OUT2
1
16
OUT1
OUT2B
2
15
OUT1B
VCC
3
14
GND
CS
4
13
VREF
VMIN
5
12
LS
VPWM
6
11
CT
COSC
7
10
HIN+
FG/RD
8
9
HIN-
Figure 2. Pin Configuration of AM4967
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
2
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Pin Description
Pin Number
Pin Name
Function
1
OUT2
Second channel P-type driver output. Open-drain output, must be connected
with pull-up resistor to drive external power devices in operation
2
OUT2B
Second channel N-type driver output. Push-pull output to drive external
power devices
3
VCC
Power supply
4
CS
Current limiter indicator. Fixed to 0.2V internally. Maximum allowable current is decided by external sample resistance. When the voltage of this pin
exceeds 0.2V, the output will be shut down by current limit. If this function is
not used, connect this pin to ground directly
5
VMIN
Minimum speed setting terminal. Connect it to VREF when disused. In case it
is tied to other power supply for controlling, an isolated resistor is necessary
6
VPWM
Speed control terminal. It is full speed mode when connected to ground. If the
speed is controlled by PWM mode, the frequency of control signal is 20kHz
to 100kHz. Moreover, a low pass network is necessary to transfer PWM to
DC level
7
COSC
PWM basic oscillation frequency generator when connected with a capacitor
of 220pF. 30kHz frequency is available.
8
FG/RD
"FG" means pin 8 is an output pin of FG signal which is used for detecting
rotation speed. "RD" means pin 8 is an output pin of RD signal, and is used
for detecting fan rotate-stop state. "FG" and "RD" can be selected according
to the requirement. This pin need to be connected with pull-up resistor when
used. A new pulse will be generated once input signal changed. Keep this pin
open when it is not to be used
9
HIN-
Hall sensor negative input. To prevent noise, this pin is recommended to be
placed as close as possible to Hall circuit. If necessary, a capacitor may be
added between HIN+ and HIN- to reduce the influence caused by noise
10
HIN+
Hall sensor positive input. To avoid noise, this pin is recommended to be
placed as close as possible to Hall circuit
11
CT
Lock protection and auto start frequency generator. It is connected with an
external 0.47µF capacitor which decides lock-rotate time and start time. If
lock-rotate protection function is disused, please connect this pin to GND
12
LS
Linear start terminal. This pin is connected to VREF externally via a capacitor
of 0.47µF to 1µF which enables fan start steadily. Start time is dependent to
the capacitance. If linear start function is not used, connect this pin to ground
13
VREF
5V voltage reference
14
GND
Ground for circuit control
15
OUT1B
First channel N-type driver output. Push-pull output to drive external power
devices
16
OUT1
First channel P-type driver output. Open-drain output, must be connected with
pull-up resistor to drive external power devices in operation
BCD Semiconductor Manufacturing Limited
Oct. 2008 Rev. 1. 2
3
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Functional Block Diagram
8
CT
VCC
VREF
11
Lock Shutdown
and
Auto Restart
3
13
5V
Reference
15
16
Predriver
Controller
HIN+
HIN-
FG/RD
Thermal Shutdown
2
10
1
OUT1B
OUT1
OUT2B
OUT2
9
Hysteresis
Amp
Hysteresis
Amp
Oscillation
12
5
6
LS VMIN VPWM
7
COSC
4
14
CS
GND
Figure 3. Functional Block Diagram of AM4967
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
4
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Truth Table
1. Driver-lock. VOSC is High, VPWM, VVMIN and VLS are low.
HIN-
HIN+
H
L
CT
OUT1
OUT1B
OUT2
OUT2B
FG/RD
Mode
L
L
OFF
H
L
OUT1
OUT2 (Driver)
OFF
H
L
L
OFF
OUT2
OUT1 (Driver)
OFF
L
OFF
H
L
OFF
H
OFF
L
OFF
L
L
H
H
L
L
H
H
Lock Protection
2. Speed control. VCT, VLS are low.
VPWM, VMIN
COSC
L
H
H
L
HIN-
HIN+
OUT1
OUT1B
OUT2
OUT2B
Mode
H
L
L
L
OFF
H
OUT1
OUT2 (Driver)
L
H
OFF
H
L
L
OUT2
OUT1 (Driver)
H
L
OFF
L
OFF
H
L
H
OFF
H
OFF
L
Regenerative
Ordering Information
AM4967
E1: Lead Free
G1: Green
Circuit Type
Pin 8
R: RD
Blank: FG
TR: Tape and Reel
Blank: Tube
Package
GS: SSOP-16
Package
SSOP-16
Temperature
Range
Part Number
Lead Free
Marking ID
Green
Lead Free
Green
Packing
Type
AM4967GS-E1
AM4967GS-G1
AM4967GS
AM4967GS-G1
Tube
AM4967GSTR-E1
AM4967GSTR-G1
AM4967GS
AM4967GS-G1
Tape & Reel
AM4967RGS-E1
AM4967RGS-G1
AM4967RGS AM4967RGS-G1
-30 to 105oC
AM4967RGSTR-E1 AM4967RGSTR-G1 AM4967RGS AM4967RGS-G1
Tube
Tape & Reel
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 package.
BCD Semiconductor Manufacturing Limited
Oct. 2008 Rev. 1. 2
5
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
VCC
18
V
OUT1B/OUT2B Output Current
IOUTB
20
mA
OUT1/OUT2 Sink Current
IOUT
20
mA
OUT1B/OUT2B/OUT1/OUT2
Withstand Voltage
VOUT
18
V
VPWM/VVMIN
7
V
VLS
7
V
VFG/VRD
VCC
V
FG/RD Output Current
IFG/IRD
10
mA
VREF Output Current
IREF
20
mA
Power Dissipation (Note 2)
PD
800
mW
Storage Temperature Range
TSTG
-55 to 150
oC
ESD (Human Body Model)
ESD
2000
V
Supply Voltage
VPWM/VMIN Withstand Voltage
LS Withstand Voltage
FG/RD Withstand Voltage
Note 1: 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 2: When mounted on the specified printed circuit board (114.3mm×76.1mm×1.6mm, glass epoxy).
Recommended Operating Conditions
Parameter
Supply Voltage
Symbol
Min
VCC
VPWM/VMIN Input Voltage
Hall Input Voltage
Ambient Temperature
TA
Oct. 2008 Rev. 1. 2
Typ
Max
Unit
5.5
16
V
0
5
V
0.2
3
V
-30
105
o
C
BCD Semiconductor Manufacturing Limited
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Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Electrical Characteristics
(VCC=12V, TA=25oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
IQ1
Lock off
8
10
12
IQ2
Lock on
8
10
12
4.5
5.0
5.5
V
mA
Quiescent Current
IOUT=5mA
VREF Reference Voltage
VREF
Current Limit Voltage
VLIM
186
200
215
mV
COSC High Level Voltage
VOSCH
3.0
3.4
3.8
V
COSC Low Level Voltage
VOSCL
0.9
1.1
1.3
V
25.4
30
35.5
kHz
COSC Frequency
fOSC
CT High Level Voltage
VCTH
2.4
3.3
3.6
V
CT Low Level Voltage
VCTL
1.0
1.3
1.6
V
CT Charge Current
ICHG
VCT=0.5V
1.5
2
2.5
µA
CT Discharge Current
IDHG
VCT=3.5V
0.13
0.2
0.25
µA
CT Charge and Discharge Ratio
RCD
ICHG/IDHG
8.5
10
14.5
Linear Start Charge Current
ILS
VLS=1V
0.5
0.7
µA
VCC0.9
VCC
V
CL=220pF
OUT1B/OUT2B High Level Voltage
VOBH
IOUT=10mA
OUT1B/OUT2B Low Level Voltage
VOBL
IOUT=10mA
0.9
1.5
V
OUT1/OUT2 Low Level Voltage
VOL
IOUT=10mA
0.45
0.8
V
FG Signal Hall Input Sensitivity
VHN
IHIN+, IHIN- difference voltage
(include offset and hysteresis)
±10
FG Saturation Voltage
VSAT
ISINK=5mA
200
FG Leakage Current
ILFG
VFG=VCC
VPWM/VMIN Bias Current
IPWMB/IVMINB
VCC1.8
VOSC=VPWM/VVMIN=2V
0.1
mV
500
mV
30
µA
3
µA
BCD Semiconductor Manufacturing Limited
Oct. 2008 Rev. 1. 2
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Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Typical Performance Characteristics
16
16
14
14
Supply Current (mA)
Supply Current (mA)
12
12
10
8
10
8
6
4
6
TA=25°C
VCC=12V
2
4
2
4
6
8
10
12
14
16
0
-40
18
-30
-20
-10
Supply Voltage (V)
0
10
20
30
40
50
60
70
80
O
Ambient Temperature ( C)
Figure 5. Supply Current vs. Ambient Temperature
Figure 4. Supply Current vs. Supply Voltage
7.5
6.0
7.0
6.5
Reference Voltage (V)
Reference Voltage (V)
5.5
5.0
4.5
VCC=12V
4.0
6.0
5.5
5.0
4.5
4.0
VCC=12V
3.5
IOUT=5mA
O
TA=25 C
3.0
2.5
3.5
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
0
90
2
4
6
8
10
12
14
16
18
20
Output Current (mA)
O
Ambient Temperature ( C)
Figure 6. Reference Voltage vs. Ambient Temperature
Figure 7. Reference Voltage vs. Output Current
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
8
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Typical Performance Characteristics (Continued)
1000
Power Dissipation (mW)
800
600
400
200
0
-20
0
20
40
60
80
100
Ambient Temperature (°C)
Figure 8. Power Dissipation vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Oct. 2008 Rev. 1. 2
9
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Operating Diagram
VPWM Voltage
fOSC=30kHz (COSC=220pF)
ON-Duty-Large
3.0V
VMIN Voltage
COSC Voltage
1.0V
ON-Duty-Small
0V
Minimum Speed Setup
Rotation (Stop Mode)
Low
Speed
PWM Adjustable
Speed
High
Speed
Full Speed
FG
RPM
Figure 9. Operating Diagram 1 of AM4967 (Speed Control, Note 3)
Note 3:
voltage becomes lower, output ON duty becomes large.
Sequentially, coil current increases and the motor runs at
high speed which is monitored by FG output while rotation-stop state is monitored by RD output.
1. Minimum Speed Setting Mode (Stop Mode)
When fan rotate at low speed, its lowest speed is settable
by VMIN pin voltage. If not, fan motor stops.
3. Full Speed Rotation Mode
2. Low Speed to High Speed Setting Mode
When VPWM voltage drops to 1.0V or lower, motor fan
will run at full speed. (If the speed is not controlled,
VPWM=GND)
PWM control system works by comparing the voltage of
VPWM and COSC (1.0V to 3.0V). When VPWM voltage
is low, the transistors of the upper and lower side outputs
are ON. On contrary, when VPWM voltage is high, the
upper side transistors are OFF. And coil current re-circulates in a lower side transistor. Therefore, as the VPWM
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
10
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Operating Diagram (Continued)
LS Voltage
3.0V
VMIN Voltage
COSC
VPWM Voltage
1.0V
0V
Lock Protection
Linear Start
VPWM Setting Speed
100%
ON-Duty
0%
Figure 10. Operating Diagram 2 of AM4967 (Linear Start, VPWM Voltage<VMIN Voltage, Note 4)
LS Voltage
VPWM Voltage
3.0V
VMIN Voltage
COSC
1.0V
0V
Lock Protection
Linear
Start
VMIN Setting Speed
100%
ON-Duty
0%
Figure 11. Operating Diagram 3 of AM4967 (Linear Start, VPWM Voltage>VMIN Voltage, Note 4)
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
11
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Operating Diagram (Continued)
LS Voltage
VPWM Voltage
3.0V
VMIN Voltage
COSC
1.0V
0V
Lock Protection
Linear
Start
VMIN Setting Speed
RD
High Level
Low Level
100%
ON-Duty
0%
Figure 12. Operating Diagram 4 of AM4967 (Note 4)
Note 4: The inclination of LS voltage is adjusted between VLS and VREF according to the capacitance which is recommended
to be 0.1µF to 1.0µF.
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
12
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Typical Application
Power In
1kΩ
More than
1µF/25V
OUT1
OUT2
100Ω
3
VCC
More than
1µF/25V
13
Hall
9
VREF
10kΩ~
100kΩ
FG/RD
8
AM4967
HIN-
10
12
5
CS
OUT1
LS
OUT1B
VMIN
OUT2
OUT2B
6
4
HIN+
VPWM
PWM In
COSC
7
220pF
(f =30kHz)
GND
16
15
1
2
14
CT
11
0.47µF
Figure 13. Typical Application of AM4967 (VCC=12V)
BCD Semiconductor Manufacturing Limited
Oct. 2008 Rev. 1. 2
13
Data Sheet
ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR
AM4967
Mechanical Dimensions
SSOP-16
Unit: mm(inch)
3.800(0.150)
4.000(0.157)
7
0.200(0.008)
o
0.300(0.012)
0.635(0.025)
7
o
BSC
4.700(0.185)
Φ 0.800(0.031)
5.100(0.201)
0.100(0.004)
1.000(0.039)
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
1.550(0.061)
o
0.250(0.010)
1.350(0.053)
0.150(0.006)
0
R0.150(0.006)
8
o
o
0.250(0.010)
R0.150(0.006)
8
o
0.650(0.026)
0.750(0.030)
0.200(0.008)
0.250(0.010)
0.020(0.001)
0.050(0.002)
DETAIL A
Oct. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
14
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