Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UA9849
LINEAR INTEGRATED CIRCUIT
3-PHASE MOTOR DRIVER FOR
CD-ROMS
„
DESCRIPTION
The UTC UA9849 is ICs developed for CD-ROM spindle
motor drives. These ICs possess a short brake and
reverserotation brake for two types of brake functions, and also
contain FG output and rotation direction detection (FR) circuits,
making them high-functionality and high-performance ICs.
„
HSOP-28
FEATURES
* Three-phase, full-wave, pseudo-linear drive system.
* Built-in power save and thermal shutdown functions.
* Built-in current limiter and Hall bias circuits.
* Built-in FG output.
* Built-in rotation direction detector.
* Built-in reverse rotation prevention circuit.
* Built-in short brake pin.
„
ORDERING INFORMATION
Normal
UA9849-SH1-T
Ordering Number
Lead Free
UA9849L-SH1-T
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
Halogen Free
UA9849G-SH1-T
Package
Packing
HSOP-28
Tube
1 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN #
2
4
7
8
9
10
11
12
13
14
15
17
18
20
21
22
23
24
25
26
27
28
FIN
PIN NAME
A3
A2
A1
GND
H1+
H1H2+
H2H3+
H3VH
CNF
SB
FR
ECR
EC
PS
FG
VCC
VM2
VM1
RNF
-
FUNCTOIN
Output
Output
Output
GND
Hall Signal Input
Hall Signal Input
Hall Signal Input
Hall Signal Input
Hall Signal Input
Hall Signal Input
Hall Bias
For connection of phase compensation capacitor
Short brake
Rotation direction detection
Output voltage control reference
Output voltage control
Power save
FG signal output
Power Supply
Motor Power Supply 2
Motor Power Supply 1
For connection of output current detection resistor
SUB GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
28
RNF
27
VM1
26
VM2
25
VCC
24
FG
23
PS
22
EC
21
ECR
20
FR
18
SB
17
CNF
15
VH
DRIVER
TSD
A3
2
CURRENT
SENCE AMP
A2
4
A1
7
GND
8
DRIVER
VCC
+
TL
PS
HALL AMP
H1+
9
H1-
10
H 2+
11
12
H 3+
13
TORQUE
SENSE AMP
+
-
+
-
+
VCC
+
-
H2-
-
D
CK
+
-
R
Q
Q
SHORT BREAK
+
HALL BIAS
H3-
14
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Applied Voltage ( with 5V Power Supply)
VCC
7
V
Applied Voltage ( motor Power Supply1 )
VM1
16
V
Applied Voltage ( motor Power Supply2)
VM2
16
V
Output Current(Note 4)
IOUT
1.3
A
Power Dissipation(Note 2)
PD
2.2
W
Operating Temperature
TOPR
-20 ~ 75
°C
Storage Temperature(Note 3)
TSTG
-55 ~ 150
°C
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. Reduced by 17.6mW for increase for TA of 1°C over 25°C
3. TJ should not exceed 150°C
4. TJ should not exceed PD or ASO value.
„
RECOMMENDED OPERATING CONDITIONS (TA =25°C)
PARAMETER
Power Supply Voltage
„
SYMBOL
VCC
VM1
VM2
MIN
4.25
3.0
3.0
TYP
MAX
5.5
15
15
UNIT
V
ELECTRICAL CHARACTERISTICS
(TA=25°C, VCC=5V, VM1=12V, VM2=12V, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
Total Device
Circuit Current 1
ICC1
In the power save ON state
Circuit Current 2
ICC2
In the power save OFF state
Power Save
ON Voltage Range
VPSON
OFF Voltage Range
VPSOFF
Hall Bias
Hall Bias Voltage
VHB
IHB=10mA
Hall Amplifier
Input Bias Current
IHA
Same Phase Input Voltage Range
VHAR
Minimum Input Level
VINH
H3 Hysteresis Level
VHYS
Torque Command
Input Voltage Range
EC
“-“Offset Voltage
ECOFFECR=2.5V
“+“Offset Voltage
ECOFF+
ECR=2.5V
Input Bias Current
ECIN
ECR = EC
I/O Gain
GEC
EC=1.5V,2.0V
FG
FG Output High Level Voltage
VFGH
IFG= -20µA
FG Output Low Level Voltage
VFGL
IFG=3mA
Duty (Reference Value)
DU
Rotation Detection
FR Output High Level Voltage
VFRH
VFRH= -20µA
FR Output Low Level Voltage
VFRL
IFR= 3mA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP.
MAX
UNIT
0
4.1
0.2
6.5
mA
mA
1.5
V
V
0.9
1.5
V
0.7
3.0
4.0
20
40
µA
V
mVP-P
mV
-50
50
0.5
0.51
4.0
-20
80
2.0
0.61
V
mV
mV
µA
A/V
0.4
V
V
%
3.5
0.5
1.5
50
10
1.0
-80
20
0.35
4.5
0
4.8
0.25
50
4.1
0
4.4
0.25
0.4
V
V
4 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
Output
Output Saturation High Level Voltage
VOH
Output Saturation Low Level Voltage
VOL
Pre-Drive Current
IVML
Output Limit Current
ITL
Short Brake
On Voltage Range
VSBON
OFF Voltage Range
VSBOFF
Note: Not designed forradiation resistance.
TEST CONDITIONS
TYP.
MAX
UNIT
500
1.0
0.4
35
700
1.5
0.8
70
840
V
V
mA
mA
1.5
V
V
IO= -600mA
IO= 600mA
EC=0V output open
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
3.5
5 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
INPUT/OUTPUT CIRCUIT
(1) Power Save
(2) Torque Command Input
(3) Torque Output (A1,A2 and A3)
VM2
VM1
External Resistor (RNF)
RNF
A1
A2
A3
GND
Fig.3
(4) Hall Input (H1+,H1-,H2+,H2-,H3+,H3-)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
INPUT/OUTPUT CIRCUIT(Cont.)
(5) Hall Bias
(6) FG Output
(7) FR Output
30K
FR
Fig.7
(8) Short Brake
Note: Resistance values are typical values.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
CIRCUIT OPERATION
(1) Hall input to coil output
The phase relationship between the Hall input signals and the output current and voltage is shown in Fig.9. The
motor position data input via the Hall pins is amplified by the Hall amplifier, and formed into waveforms by the matrix
block. These signals are input to the output driver that supplies the drive current to the motor coils.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
CIRCUIT OPERATION(Cont.)
(2) Torque command
The RNF pin voltage with respect to the torque command (EC) is as follows:
The I/O gain (GEC) from the EC pin to the RNF pin (output current) is determined by the RNF detector resistor.
GEC = 0.255 / RNF [A / V]
The torque limit current ITL is given by: ITL = 0.35 / RNF [A]
ROTATION DIRECTION
Ec<ECR
FORWARD
Ec> ECR
REVERSE(Note)
Note: Stops after detecting reverse
(3) Reverse rotation detection function
H2+
H2 -
+
-
H3+
H3 -
+
-
D-FF
D Q
CK
Ec
ECR
H:Output .OPEN
(HIGH-IMPEDANCE)
+
Fig.11
FR SIGNAL OUTPUT PIN
FORWARD
L
REVERSE
H
The reverse detection circuit construction is shown in Fig.11.
(1) Forward (Ec < ECR)
The phase relationship between the Hall input signals H2+ and H3+ becomes as shown in Fig.9, and the reverse
rotation detection circuit does not operate.
(2) Reverse (Ec > ECR)
The phase relationship between the signals H2+ and H3+ is opposite that for forward operation, and the reverse
rotation detection circuit operates. The output goes OFF, and becomes open circuit.
(4) Short brake
When 3.5V or more is applied to the short brake pin, the upper-side output transistors of all go off, and the
lowerside output transistors go on. Short braking operates regardless of the torque command signal.
(5) Other circuits
When 3.5V or more is applied to the power save pin, all circuits are on. When 1.5V or less is applied, the IC
enters power save mode. Also, the Hall bias pins turn on and off with the power save pin.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
9 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
RNF
RNF
28
DRIVER
VM1
27
TSD
A3
2
CURRENT
SENSE AMP
A2
4
DRIVER
VCC
24
PS
8
TORQUE
SENSE AMP
H1+
+
-
10
H2+
11
HALL 2
H212
H3+
13
PS
23
EC
22
+
-
+
SERVO
SIGNAL
ECR
21
+
-
D
CK
+
R
FR
20
Q
Q
SB
SHORT BRAKE
18
CNF
17
+
-
HALL 3
HALL BIAS
H314
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
VM
FG
TL
GND
H1-
VCC
25
+ -
A1
HALL 1
VM2
26
VH
15
10 of 12
QW-R109-006,C
UA9849
„
LINEAR INTEGRATED CIRCUIT
OPERATION NOTES
(1) Power save
The power save input is an I / O circuit like the own shown in Fig.1.
The thermal derating characteristics of the power save pin is –8mV / °C, and the resistance will fluctuate
between 30% so be careful of the input voltage range.
(2) Hall input
The input circuit shown in Fig.4 is used for the Hall inputs.
The Hall elements can be connected either in series or in parallel.
(3) Thermal shutdown (TSD)
When the junction temperature reaches 175°C, the A1, A2, and A3 coil outputs go open circuit. The thermal
shutdown has approximately 15°C of hysteresis.
Vcc
Vcc
H1
H2
H1
H2
H3
H3
(Hall bias)
Parallel connection
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
(Hall bias)
Series connection
11 of 12
QW-R109-006,C
UA9849
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
12 of 12
QW-R109-006,C
Similar pages