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Pentagon Connection
SI-7502 (SLA5011/SLA6503)
5-Phase Stepper Motor Driver ICs
sAbsolute Maximum Ratings
Part No. Parameter Motor supply voltage Auxiliary supply voltage Control voltage Reference voltage Detection voltage Power dissipation Ambient operating temperature Drain -Source voltage Drain current Avalanche energy capability (Single pulse) Power dissipation Channel temperature Storage temperature Collector-Base voltage Collector-Emitter voltage Emitter-Base voltage Collector current Collector current (Pulse) Base current Power dissipation Junction temperature Storage temperature Symbol VCC VS Vb Vref VRS PD TOP VDSS ID EAS PT Tch Tstg VCBO VCEO VEBO IC IC (pulse) IB PT Tj Tstg Ratings 44 15 7 1.5 5 1 0 to +65 60 5 2 35 150 -40 to +150 -60 -60 -6 -3 -6 -1 35 150 -40 to +150 (Ta=25C) Units V V V V V W C V A mJ W C C V V V A A A W C C
SI-7502
SLA5011
SLA6503
sElectrical Characteristics
Part No. Parameter Symbol ICC IS Ib IIU-L, IIL-L IOU-on IOU-off VOL-on VOL-off F VRS VTH Re (yts) RDS (ON) CISS COSS VSD trr ICBO VCEO hFE VCE (sat) min Limits typ max 40 12.5 50 1.6 11 10 1.5 30 1.05 4.0 3.3 0.17 300 160 1.1 150 0.22 Units mA mA mA mA mA A V V kHz V V S pF pF V ns A V V Conditions VCC=42V, Vb=5.5V VS=12.5V Vb=5.5V VIU=VIL=0.4V Vb=5V, AIU to EIU pin open Vb=5V Vb=5V, AIL to EIL pin open Vb=5V Vb=5V Vb=5V, VREF pin open VDS=10V, ID=250 A VDS=10V, ID=5A VGS=10V, ID=5A VDS=25V, f=1.0MHz,VGS=0V ISD=5A ISD=100mA VCB=-60V IC=-10mA VCE=-4V, IC=-3A IC=-3A, IB=-6mA
(Ta=25C)
Supply current Input current SI-7502 Upper drive circuit drive current Lower drive circuit voltage Oscillation frequency Detection voltage Gate threshold voltage Forward Transconductance DC ON-resistance Input capacitance Output capacitance Di forward voltage between source and drain Di reverse recovery time between source and drain Collector cut-off current Collector-emitter voltage DC current gain Collector emitter saturation voltage
8 VS-1.5 20 0.8 2.0 2.2
SLA5011
1.5 -10
SLA6503
-60 2000 1.5
104
SI-7502 (SLA5011/SLA6503)
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502 (SLA5011/SLA6503)
sInternal Block Diagram (Dotted Line)
Auxiliary power supply Control power supply Vb VS Main power supply VCC
Variable current resistor RX Excitation signal
Trigger pulse generator circuit
SI-7502
SLA6503
Reference voltage
Level shift current control unit
Motor
Comparator amplifier
SLA5011
Current sense resistor Rs
sEquivalent Circuit Diagram
SI-7502
24 20 23 19 16 12 15 11 7 8 27
R17 1 R7 R1 Trigger pulse generator circuit R4 R3 R6 R12
- +
R18
R19
R20
R21
R8 Tr2 Tr3
R9 Tr4
R10 Tr5
R11 Tr6
R22
R13
R23
R14
R24
R15
R25
R16
R26 26
2 R2 4 5 3
R5 Tr1
R27
R28
R29
R30
R31
25
21
22
18
17
13
14
10
6
9
SLA6503
R1
1 R2
12
2 3
4 5
6 7
8 9
10 11 R12k Typ R250 Typ
SLA5011
3
5
7
9
11
2
4
6
8
10
1
12
SI-7502 (SLA5011/SLA6503)
105
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502 (SLA5011/SLA6503)
sDiagram of Standard External Circuit
C1 C2 C3 C4 R1 Di : 100 F/63V : 50 F/25V : 10 F/10V : 470pF : 1k : RK-34 (Sanken)
VB (5V)
VS (12V) VCC (15~42V) C3 + C1 + C2 +
Excitation signal input
Aiu Biu Ciu Diu Eiu Ail Bil Cil Dil Eil Active High
7407
1 25 22 17 14 6
26
27 24 23 16 15 7 2 4 6 8 10 2 4 6 8 10
1 12
A0 3 5 7 9 11 3 5 7 9 11 D0 E0 IO (typ) = 0.92/RS IOPD (typ) = (1.3xa-0.01) / Rs a = VbxR' / (30000+R') R' = 5100xRx / (5100+Rx) B0 C0
7406
SI-7502
21 18 13 10 9 235 RX 4
SLA6503
Stepper Motor
20 19 12 11 8
1 12 IO R1
SLA5011
PD
C4
RS
Di
sExternal Dimensions
SI-7502
(Unit: mm)
sExternal Dimensions
SLA6503/SLA5011
31.00.2 24.40.2 16.40.2
(Unit: mm)
8(max)
3.2
0.15
3.20.15x 3.8
4.8
0.2
1.70.1
9.5min (10.4) 16.00.2 2.7 13.00.2
Pin-1 marking (White dots)
41 (max)
9.90.2 8.5max.
Part No.
Lot No.
Part No.
30 (max)
R R
3.5 +1 -0.5
Lot No.
Pin 1 1.20.15 0.85+0.2 -0.1 1.450.15 0.7 11xP2.54 =27.941.0 31.5max.
12 0.55+0.2 -0.1 2.20.7
27pin 0.5 +0.15 -0.05 1pin
#
26pin
P1.270.7 x 26=33.02 27pin
0.3 +0.15 -0.05
#
2.540.6
R : 0.3mm
(Note) Dimensions marked with a # indicate dimensions of lead tip.
1 2 3 4 5 6 7 8 9 10 11 12
106
SI-7502 (SLA5011/SLA6503)
0.8 max
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502 (SLA5011/SLA6503)
Application Notes
sDetermining the Output Current IO (Control Current)
The main factors that determine the output current are current sense resistor RS, supply voltage Vb, and variable current resistor RX. (1) Normal mode To operate a motor at the maximum current level, set RX to infinity (open). From Fig. A, when the maximum current ripple is designated as IOH, its value will be, RS VRSH
Fig. A
IOH O Waveform of output current
Fig. B Output current vs. Current sense resistor
(A) 3 IOH(max)= 0.212xVb-0.01 Rs 0.169xVb-0.03 Rs
VRSH can be calculated as follows: VRSH=0.19xVb-0.03 (center value) ............................... (2) From equations (1) and (2), the output current IOH can be calculated as follows: IOH= 1 RS (0.19xVbx-0.03)
Output current IOH
IOH=
...................................................................... (1)
2
IOH(min)=
1
IOH(max) (Vb=5V) 0.5 IOH(min) (Vb=5V) 0.2
1
2
3
4
5
()
The relationship between IOH and RS is shown in Fig. B. (2) Power down mode When an external resistor RX is connected, VRSH changes as shown in Fig. C even when RS is retained. Obtain a power down output current IOHPD from Fig. C and equation (1).
Sense voltage VRSH
Sense resistor Rs
Fig. C Sense voltage vs. Variable current resistor
(V) 1.0 VRSH (max)= 7.2xRX xVb-0.01 152.6+33.8xRX 6.1xRX xVb-0.03 152.6+33.8xRX
)( ax (m
sRelation between Output Current IO (Control Current) and Motor Winding Current IOM
The SI-7502 uses the total current control system; therefore, the output current IO is different from the motor winding current. In a general pentagonal driving system, the current flows as shown in Figure D. The relation between IO and IOM is as follows: IO=4xIOM With some driving systems, the relation can also be as follows: IO=2xIOM
0.8
VRSH (min)=
=5 Vb
RS H
V)
in ) b (V
V) =5
0.6
VR
SH
(m
V
0.4
0.2
0.5
1
2
5
10
20 (K)
Variable current resistor Rx
Fig. D Coil current flow at pentagonal driving
IOM
IOM
IOM 2xIOM VCC
IOM
2xIOM
to SI-7502 Sense resistor Rs 4xIOM
SI-7502 (SLA5011/SLA6503)
107
5-Phase Stepper Motor Driver ICs (Pentagon Connection)
SI-7502 (SLA5011/SLA6503)
sMotor Connection
The 5-phase stepper motor supports various driving systems and the motor connection varies depending on the driving system used. Use of the motor with some driving systems may be restricted by patents. Therefore, be sure to ask the motor manufacturer about the motor connection and driving system to be used.
sThermal design
The driver (SLA5011/SLA6503) dissipation varies depending on a driving system used even if the output currents (control current) are the same. Therefore, measure the temperature rise of the driver under the actual operating conditions to determine the size of the heatsink. Figure E shows an SLA5011/SLA6503 derating curve. This derating curve indicates Tj=150C; however, when using this device, allow sufficient margin when selecting a heatsink so that TC100C (AI FIN temperature on the back of the SLA) is obtained. Fig. E SLA5011/SLA6503 Derating curve
(W) 15
10 1 0x
Power dissipation PT
mm x2 00
10
50 x5
AI
0x
FI N
2m
5
m AI
N0
FI
FIN
N
0 -40
0
50
100
150 (C)
Ambient temperature Ta
SI-7502
sHandling Precautions
Refer to the product specifications. Solvents- Do not use the following solvents: Substances that can dissolve the package Substances that can weaken the package Chlorine-based solvents: Trichloroethylene, Trichloroethane, etc. Aromatic hydrogen compounds: Benzene, Toluene, Xylene, etc. Keton and Acetone group solvents Gasoline, Benzine, Kerosene, etc.
108
SI-7502 (SLA5011/SLA6503)

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