SI-7502

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 V CC VS Vb Vref V RS PD TOP VDSS ID EAS PT Tch Tstg V CBO V CEO 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=25°C) 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 V RS VTH Re (yts) RDS (ON) CISS COSS V SD 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 µA V V kHz V V S Ω pF pF V ns µA V V Conditions VCC=42V, Vb=5.5V VS =12.5V Vb =5.5V VIU=V IL=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 µ A VDS =10V, ID=5A VGS=10V, ID=5A VDS =25V, f=1.0MHz,V GS=0V ISD=5A ISD=±100mA VCB =−60V IC=−10mA VCE =−4V, IC=−3A IC=−3A, IB =−6mA (Ta=25°C) 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 R1≅2kΩ Typ R2≅50Ω 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 µ F/63V : 50 µ F/25V : 10 µ F/10V : 470pF : 1kΩ : RK-34 (Sanken) VB (5V) VS (12V) VCC (15~42V) C3 + C 1 + 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) = (1.3×a−0.01) / Rs a = Vb×R' / (30000+R') R' = 5100×Rx / (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 31.0±0.2 24.4±0.2 16.4±0.2 (Unit: mm) 8(max) φ 3.2 ±0.15 3.2±0.15× 3.8 4.8 ±0.2 1.7±0.1 9.5min (10.4) 16.0±0.2 2.7 13.0±0.2 Pin-1 marking (White dots) 41 (max) 9.9±0.2 8.5max. Part No. Lot No. Part No. 30 (max) R R 3.5 +1 −0.5 Lot No. Pin 1 1.2±0.15 0.85+0.2 −0.1 1.45±0.15 ±0.7 11×P2.54 =27.94±1.0 31.5max. 12 0.55+0.2 −0.1 2.2±0.7 27pin 0.5 +0.15 −0.05 1pin # 26pin P1.27±0.7 × 26=33.02 27pin 0.3 +0.15 −0.05 # 2.54±0.6 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)= 0.212×Vb−0.01 Rs 0.169×Vb−0.03 Rs VRSH can be calculated as follows: VRSH=0.19× Vb−0.03 (center value) ............................... (2) From equations (1) and (2), the output current IOH can be calculated as follows: IOH= 1 RS (0.19 ×Vb×-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 (Ω) 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)= 7.2×RX ×Vb−0.01 152.6+33.8×RX 6.1×RX ×Vb−0.03 152.6+33.8×RX )( ax (m s Relation between Output Current I O (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=4× IOM With some driving systems, the relation can also be as follows: IO=2× IOM 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 (KΩ) Variable current resistor Rx Fig. D Coil current flow at pentagonal driving IOM IOM IOM 2×IOM IOM 2×IOM VCC to SI-7502 Sense resistor Rs 4×IOM 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 =150°C; however, when using this device, allow sufficient margin when selecting a heatsink so that T C≤ 100°C (AI FIN temperature on the back of the SLA) is obtained. Fig. E SLA5011/SLA6503 Derating curve (W) 15 10 1 0× Power dissipation PT mm ×2 00 10 50 ×5 AI 0× 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)