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Ordering number : EN4290A
Thick-film Hybrid IC
STK6103
DC 3-phase Brushless Motor Driver (Output Current 3A)
Overview
Package Dimensions
The STK6103 is a hybrid IC incorporating a 3-phase unit: mm brushless motor controller and driver into a single package, on the Sanyo IMST (Insulated Metal Substrate 4130 Technology) substrate. Revolution speed is controlled through the DC voltage level (Vref1) external input and PWM control of motor phase winding current. The driver is MOSFET to minimize circuit loss and handle high-output current (rush current) demands.
[STK6103]
Applications
* PPC and LBP drum motors * Air conditioner fan motors
Features
* The output driver transistor is MOSFET for low power loss (half that of a bipolar transistor) and reliable handling of high-output current (rush current). * Variation in Vref1 level causes the driver transistor to switch to PWM drive for high-efficiency motor speed variation. * Normal and reverse revolution select function. * Start/stop and brake functions. * Current limiter function.
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Maximum output current Operating substrate temperature Junction temperature Storage temperature Symbol VCC1 max VCC2 max IO max TC max Tj max Tstg No input signal No input signal Position detect input signal cycle = 30 ms, PWM duty = 50%, operation time 1s Conditions Ratings 50 7 5 105 150 -40 to +125 Unit V V A C C C
Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage 1 Output current Supply voltage 2 Brake current Symbol VCC1 Io ave VCC2 IOB With input signal DC phases present With input signal 80 Hz full sine waves (all phases). Operating time 0.1 s duty = 5% (see Note 1). Conditions Ratings 16 to 42 3 4.75 to 6.0 8 Unit V A V A
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73096HA (OT)/O012YO No. 4290-1/11
STK6103 Electrical Characteristics at Tc=25C, VCC1 = 24 V, VCC2 = 5.0 V
Parameter Supply current 1 (pin 13) Supply current 2 (pin 13) Output saturation voltage 1 Output saturation voltage 2 Internal MOSFET diode forward voltage PWM oscillation frequency Current limiter reference voltage Position detect input sensitivity Position detect common mode range Input "L" current 1 (pins 2,3) Input "L" voltage 1 (pins 2,3) Input "L" current 2 (pin 4) Input "L" voltage 2 (pin 4) Vref1 "H" voltage Vref1 "L" voltage Zener voltage FG output current FG output "L" voltage FG output pulse width Symbol ICCO1 ICCO2 Vst1 Vst2 VF fC Vref2 VH CMRH IIL1 VIL1 IIL2 VIL2 Vref1H Vref1L VZ IFGH VFGL FG VFG = 1.6 V IFG = 0.3 mA CF = 0.1F, RF = 10 k 0.9 1.0 GND side transistor not in PWM GND side transistor off 0.15 5.7 80 0.4 1.1 2.82 0.35 6.2 6.7 VIL2 = GND 570 VIL1 = GND CW revolution Braking VCC1 side TR, Io = 3A GND side TR, Io = 3A IF = 3A 20 0.47 20 2.0 130 Conditions min typ 12 26 0.43 0.47 0.95 25 0.50 max 20 38 0.56 0.62 1.5 30 0.53 500 4.5 200 1.0 910 1.0 3.2 Unit mA mA V V V kHz V mV V A V A V V V V A V ms
Equivalent Circuit
No. 4290- 2/11
STK6103 Pin Functions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18, 19 20, 21 22, 23 24, 25 26, 27 28 Symbol Vref1 START/STOP CW/CCW BRAKE FG OUT TFG HC- HC+ Hb- Hb+ Ha- Ha+ VCC2 GND1 GND2 Vref2 VS VRS U V W VCC1 VZ Function GND-side driver transistor PWM control pin: range 0.15 to 3.2V "H" = START, "L" = STOP (all transistors off) "H" = CW, "L" = CCW "H" = rotate, "L" = Only GND-side transistor on Position detect signal: output 6 pulses per cycle For setting FG OUT "L" level pulse width. RF and CF pins. Motor position detect signal input pin (to Hall device) Motor position detect signal input pin (to Hall device) Motor position detect signal input pin (to Hall device) Motor position detect signal input pin (to Hall device) Motor position detect signal input pin (to Hall device) Motor position detect signal input pin (to Hall device) Motor controller supply voltage pin Motor controller IC GND pin: signal ground (SG) External RS GND-side connection pin: power ground (PG) Current limiter set pin: 0.1VCC2 when open External RS current limiter detect pin External RS connect pin Output pin (to motor winding) Output pin (to motor winding) Output pin (to motor winding) Supply voltage pin (to motor) Zener voltage (6.2V typ) for VCC1 driver transistor date source supply
Input Type
Note 1:
IOB indicates the operating current waveform peak as shown below.
No. 4290- 3/11
STK6103 Sample Application Circuit
Description of Operation The DC 3-phase brushless motor generally uses a permanent magnet for the rotor and places the stator coil around it. When the rotor and stator coil are excited, magnetic force is generated between the poles, which is used for revolution torque. For efficient revolution it is necessary to know precisely where the rotor pole is in relation to the stator pole. In the brushless motor Hall devices and Hall ICs are widely used for this purpose, by detecting the electric power generated along the lines of magnetic force. (1) Motor rotating force The block diagram for this HIC is given in Fig. 2. The conditions before input of VCC1, with VCC2 on, are START/STOP pin H level, CW/CCW pin H level, BRAKE pin H level and Vref1 pin (speed control input) H level. The position detect signal at this time, due to the effect of the rotor magnetic field, will be output signals from 1 or 2 devices (of the 3) so that HX+>HX- is input to HIC pins 7 to 12. The signals input to pins 7 to 12 are input to the motor controller and converted into signals compatible with 3-phase brushless motor revolution. When VCC1 is supplied the charge pump circuit activates, generating VCC1 MOSFET gate voltage VZ. This outputs excitation current to the motor phase windings as indicated in the timing chart (Fig. 3), and rotating the motor. For revolution speed control, the Vref1 pin voltage is converted and used for PWM drive to increase GND transistor efficiency, controlling the conduction of motor current Io (Fig. 1). Control of Io means control of power supplied to the motor, which controls motor rpm. In general motor rpm N is proportional to the PWM on duty (when motor load is constant). The PWM on duty is proportional to the size of Vref1 (see Fig. 13), and the relation of N is as outlined below. PWM ON Duty Vref1
Fig.1 PWM Drive Principle
No. 4290- 4/11
STK6103 Motor revolution is stopped by setting START/STOP to L level to turn off all drive transistors, and cut the supply of current to the motor. Motor inertia will prevent instantaneous stopping. The brake function works to shorten the amount of time needed to come to a complete stop. In input level L the VCC1 driver transistor is turned off, all GND driver transistors are turned on, and the amount of power generated by the rotating motor windings reduced to reduce the rpms. This brake function has priority over all START/STOP, CW/CCW and position detect input conditions.
Fig. 2 Block Diagram
No. 4290- 5/11
STK6103
Fig. 3 I/O Timing Chart
No. 4290-6/11
STK6103 (2) Other functions CW/CCW The direction of motor revolution can be selected by setting the input level to H or L. CW is H level and CCW is L level. The CW timing chart is indicated in Fig. 3, and the CCW timing chart in Fig. 5. Current limiter function The current limiter converts the GND driver transistor source current into VRS through the external RS, and controls GND driver transistor conduction based on a comparison of this voltage to Vref2. Vref2 generates a 0.1 VCC2 voltage in pin open state. Vref2 is generated by the voltage division between 27 k and 3 k resistances, and so the Vref2 level can be readily reduced by attaching an external resistor. To prevent HIC destruction in the event of motor lock, a current limiter can be enabled by setting Vref2 at or below Io ave. If no such protection is required, set Vref2 between Io max and Io ave to limit rush current. FG OUT This pin outputs a square wave pulse proportional to one motor revolution, which can be used as the motor servo-control PLL IC FG input signal. The square wave L level time t1 is set by the time constant of CF and RF connected to the TFG pin (Fig. 4).
Fig. 4 In general, when the n-pole 3-phase brushless motor fixed-speed rpm is expressed as N(rpm), the setting for t1 so that t1 = 0.5 t2 is given by expression x. t1 = 1000 x 0.5 N x6x n 60 2 [ms]************************************ x
The relation between CF, RF and t1 is given by expression y. t1 a*RF *CF ***************************************************************** y However, a = 1 s ( *F), R = 3 k to 30 k, t >50 s
F 1
Expression x is designed to be half that of fixed speed t2, but when an FV conversion circuit is connected to the FG OUT pin, it is necessary to reduce the duty to under 50%. In this case, adjust RF or CF as needed. (3) Precautions in drive Start current (rush current) The motor start Rs current waveform is shown in Fig. 6. Current peak IOH must not exceed Io max. Position detect signal Because signal input sensitivity VH is 500 mV max, the level of the output signal (open collector) from the Hall IC must be reduced through conversion. A sample of this circuit is shown in Fig. 7. The position detect signal must be compatible with the motor phase winding even in the time chart state shown in Fig. 3, or the motor may not revolve smoothly. Motor phase winding current during braking The motor phase winding current during braking must not exceed Io max even during peak, although several times set current levels are input.
No. 4290-7/11
STK6103
Fig. 5 CW/CCW I/O Timing Chart
No. 4290-8/11
STK6103
Fig.6 Starting Current
Fig.7 Conversion Circuit for Hall IC and Hall Device Signal
Fig.8 Thermal Radiation Design (1) Internal average power dissipation Pd The driver transistors represent the majority of the power dissipation in operation. Other losses are VCC2 and the charge pump circuit. In PWM drive in particular, the diode in the VCC1 transistor is being used as a flywheel diode, increasing VCC1 transistor loss. When these are included, internal mean power dissipation is: Pd = Io (Vst1 + VFd2 + Vst2d1) + PdA + PdB + PdC *********************** Io Vst1 Vst2 d1 d2 PdA PdB PdC VF : Motor current : VCC1 transistor saturation voltage : GND transistor saturation voltage : GND transistor PWM operation on duty : GND transistor PWM operation off duty : VCC2 loss : Charge pump circuit loss : GND transistor switching loss : VCC1 transistor internal diode normal direction voltage
Because the driver transistor is a MOSFET, Vst1 and Vst2 will increase with an increase in IO or substrate temperature Tc. PdA and PdB are generally given as: PdA VCC2 x ICCO1 ************************************************************************ PdB VCC1 x (0.49VCC1 - 4.2) x 0.001**************************************** where, VCC1 = 16 to 42V Refer to Figs. 11 to 14 for data on Vst1, Vst2, d1 and VF.
No. 4290- 9/11
STK6103 (2) Thermal radiation design Actual thermal radiation design requires determination of the IC internal average power dissipation Pd from the motor phase current Io (Fig. 9). Pd is then used to determine the thermal resistance for the radiator from the following expression. c - a = Tc max - Ta (C/W) Pd where Tc max = 105C Ta = ambient temperature With a 2.0 mm radiation plate, the required area can be determined from Fig. 10. Note that substrate temperature will vary widely with set internal air temperature, and Tc for the mounted state must be 105C max.
No. 4290- 10/11
STK6103
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of November, 1997. Specifications and information herein are subject to change without notice. No. 4290- 11/11

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