SI-7502 (SLA5011/SLA6503) Pentagon Connection 5-Phase Stepper Motor Driver ICs ■Absolute Maximum Ratings Part No. SI-7502 SLA5011 SLA6503 (Ta=25°C) 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) Symbol V CC VS Vb Vref V RS PD TOP VDSS ID EAS 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 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 PT Tch Tstg V CBO V CEO VEBO IC IC (pulse) IB PT Tj Tstg Units V V V V V W °C V A mJ W °C °C V V V A A A W °C °C ■Electrical Characteristics Part No. Parameter 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 hFE VCE (sat) Input current Upper drive circuit drive current Lower drive circuit voltage SLA5011 SLA6503 104 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 Supply current SI-7502 (Ta=25°C) SI-7502 (SLA5011/SLA6503) min Limits typ 8 max 40 12.5 50 1.6 11 10 VS −1.5 20 0.8 2.0 2.2 1.5 30 1.05 4.0 3.3 0.17 300 160 1.1 150 0.22 1.5 −10 −60 2000 1.5 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 5-Phase Stepper Motor Driver ICs (Pentagon Connection) SI-7502 (SLA5011/SLA6503) ■Internal Block Diagram (Dotted Line) Auxiliary power supply Control power supply Vb SLA6503 SI-7502 Trigger pulse generator circuit Reference voltage Variable current resistor RX Main power supply VCC VS Motor Level shift current control unit Excitation signal Comparator amplifier SLA5011 Current sense resistor Rs ■Equivalent Circuit Diagram SI-7502 24 20 23 19 16 12 15 11 7 8 27 R17 R18 R19 R20 R21 1 R7 R1 R8 Trigger pulse generator circuit R4 R9 Tr3 Tr2 R3 R10 R11 Tr4 Tr5 Tr6 R6 R12 R13 R22 R23 R14 R24 R15 R25 R16 R26 − + 2 R2 26 R27 R5 R28 4 R29 R30 R31 Tr1 5 3 25 SLA6503 21 22 18 17 13 14 10 1 R1 9 12 R2 2 4 6 3 8 5 10 7 9 11 R1≅2kΩ Typ SLA5011 6 3 2 5 4 1 7 6 9 8 R2≅50Ω Typ 11 10 12 SI-7502 (SLA5011/SLA6503) 105 5-Phase Stepper Motor Driver ICs (Pentagon Connection) SI-7502 (SLA5011/SLA6503) ■Diagram of Standard External Circuit VS (12V) VB (5V) VCC (15~42V) C 1 + C2 + Ail Bil Cil Dil Eil 1 7407 26 27 25 22 17 14 6 SI-7502 7406 21 18 13 10 9 2 3 5 Active High 24 23 2 4 16 15 7 6 8 10 20 2 19 4 12 11 8 6 8 10 3 5 B0 7 9 11 C0 Stepper Motor 3 5 7 9 11 D0 E0 1 12 IO 4 RX IO (typ) = 0.92/RS IOPD (typ) = (1.3×a−0.01) / Rs a = Vb×R' / (30000+R') R' = 5100×Rx / (5100+Rx) R1 C4 PD ■External Dimensions (Unit: mm) SI-7502 RS : 100 µ F/63V : 50 µ F/25V : 10 µ F/10V : 470pF : 1kΩ : RK-34 (Sanken) A0 1 12 SLA6503 Excitation signal input Aiu Biu Ciu Diu Eiu SLA5011 C3 + C1 C2 C3 C4 R1 Di Di ■External Dimensions 8(max) φ 3.2 ±0.15 31.0±0.2 24.4±0.2 16.4±0.2 3.2±0.15× 3.8 4.8 ±0.2 1.7±0.1 R 3.5 +1 −0.5 Lot No. 27pin 0.5 +0.15 −0.05 0.3 +0.15 −0.05 P1.27±0.7 × 26=33.02 # 1pin 26pin 27pin 2.54±0.6 Part No. Lot No. Pin 1 1.2±0.15 12 0.85+0.2 −0.1 1.45±0.15 ±0.7 11×P2.54 =27.94±1.0 # 31.5max. R : 0.3mm (Note) Dimensions marked with a # indicate dimensions of lead tip. SI-7502 (SLA5011/SLA6503) 0.8 max R 9.9±0.2 8.5max. 30 (max) Part No. 9.5min (10.4) 16.0±0.2 2.7 13.0±0.2 41 (max) Pin-1 marking (White dots) 106 (Unit: mm) SLA6503/SLA5011 1 2 3 4 5 6 7 8 9 10 11 12 0.55+0.2 −0.1 2.2±0.7 5-Phase Stepper Motor Driver ICs (Pentagon Connection) SI-7502 (SLA5011/SLA6503) Application Notes ■Determining the Output Current IO (Control Current) Fig. A The main factors that determine the output current are current IOH sense resistor RS, supply voltage Vb, and variable current resisO tor RX. Waveform of output current (1) Normal mode To operate a motor at the maximum current level, set RX to Fig. B Output current vs. Current sense resistor infinity (open). (A) From Fig. A, when the maximum current ripple is designated as IOH, its value will be, VRSH ...................................................................... (1) 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 Output current IOH IOH= 3 calculated as follows: IOH= 1 RS 2 IOH(max)= 0.212×Vb−0.01 Rs IOH(min)= 0.169×Vb−0.03 Rs 1 IOH(max) (Vb=5V) 0.5 IOH(min) (Vb=5V) 0.2 (0.19×Vb×-0.03) 1 2 The relationship between IOH and RS is shown in Fig. B. 3 4 5 (Ω) Sense resistor Rs (2) Power down mode When an external resistor RX is connected, VRSH changes as Fig. C Sense voltage vs. Variable current resistor shown in Fig. C even when RS is retained. Obtain a power (V) ■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 Sense voltage VRSH down output current IOHPD from Fig. C and equation (1). 1.0 VRSH (max)= 7.2×RX ×Vb−0.01 152.6+33.8×RX 0.8 VRSH (min)= 6.1×RX ×Vb−0.03 152.6+33.8×RX V) =5 Vb 0.6 SH )( ax (m VR RS H (m in ) b (V V) =5 V 0.4 shown in Figure D. The relation between IO and IOM is as follows: IO=4×IOM 0.2 With some driving systems, the relation can also be as follows: IO=2×IOM 0.5 1 2 5 10 20 (KΩ) Variable current resistor Rx Fig. D Coil current flow at pentagonal driving IOM IOM IOM IOM 2×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) ■Motor 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. ■Thermal 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 50 0 −40 2m N0 0 m AI FIN 50 N 5 0× FI ×5 AI Power dissipation PT mm ×2 00 1 0× 10 10 FI N 100 150 (°C) Ambient temperature Ta SI-7502 ■Handling 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 108 SI-7502 (SLA5011/SLA6503) Chlorine-based solvents: Trichloroethylene, Trichloroethane, etc. Aromatic hydrogen compounds: Benzene, Toluene, Xylene, etc. Keton and Acetone group solvents Gasoline, Benzine, Kerosene, etc. SI-7502 (SLA5011/SLA6503)