Sanyo STK6105 Specifications

Ordering number : EN4345A

Thick Film Hybrid IC

STK6105

DC 3-phase Brushless Motor Driver

(Output Current 5A)

Overview

The STK6105 is a hybrid IC incorporating a 3-phase brushless motor controller and driver into a single package, on the Sanyo IMST (Insulated Metal Substrate 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.

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=25°C

Package Dimensions

unit: mm

4130

[STK6105]

Parameter	Symbol	Conditions	Ratings	Unit
Maximum supply voltage 1	VCC1 max	No input signal	50	V
Maximum supply voltage 2	VCC2 max	No input signal	7	V
Maximum output current	Io max	Position detect input signal cycle = 30 ms,	8	A
		PWM duty = 50%, operation time 1s
Operating substrate temperature	Tc max		105	°C
Junction temperature	Tj max		150	°C
Storage temperature	Tstg		-40 to +125	°C

Allowable Operating Ranges at Ta=25°C

Parameter	Symbol	Conditions	Ratings	Unit
Supply voltage 1	VCC1	With input signal	16 to 42	V
Output current	Io ave	DC phases present	5	A
Supply voltage 2	VCC2	With input signal	4.75 to 6.00	V
Brake current	IOB	80 Hz full sine waves (all phases).	11	A
		Operating time 0.1 s, duty = 5% (see Note 1).

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TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

52595TH (OT) / 12793YO No. 4345-1/11

STK6105

Electrical Characteristics at Tc=25°C, VCC1 = 24V, VCC2 = 5.0V

Parameter	Symbol	Conditions			Ratings		Unit
				min	typ	max
Supply current 1 (pin 13)	ICCO1	CW revolution			12	20	mA
Supply current 2 (pin 13)	ICCO2	Braking			26	38	mA
Output saturation voltage 1	Vst1	VCC1 sideTR, Io = 5A			0.70	0.91	V
Output saturation voltage 2	Vst2	GND sideTR, Io = 5A			0.85	1.11	V
Internal MOSFET diode forward	VF	IF = 5A			1.0	1.5	V
voltage
PWM oscillation frequency	fC			20	25	30	kHz
Current limiter reference voltage	Vref2			0.78	0.83	0.88	V
Position detect input sensitivity	VH			20		500	mV
Position detect common mode range	CMRH			2.0		4.5	V
Input “L” current 1 (pins 2,3)	IIL1	VIL1 = GND			130	200	µA
Input “L” voltage 1 (pins 2,3)	VIL1					1.0	V
Input “L” current 2 (pin 4)	IIL2	VIL2 = GND			570	910	µA
Input “L” voltage 2 (pin 4)	VIL2					1.0	V
Vref1 “H” voltage	Vref1H	GND side transistor not in PWM			2.82	3.20	V
Vref1 “L” voltage	Vref1L	GND side transistor off		0.15	0.35		V
Zener voltage	VZ			5.7	6.2	6.7	V
FG output current	IFGH	VFG = 1.6V		80			µA
FG output “L” voltage	VFGL	IFG = 0.3mA				0.4	V
FG output pulse width	tFG	CF = 0.1µF, RF = 10kΩ		0.9	1.0	1.1	ms

Equivalent Circuit

No. 4345--2/11

							STK6105
Pin Functions
Pin No.		Symbol					Function
1		Vref1					GND-side driver transistor PWM control pin; range 0.15 to 3.2V
2		START/STOP					“H” = start, “L” = stop (all transistors off)
3							“H” = CW, “L” = CCW
		CW/CCW
4							“H” = rotate, “L” = Only GND-side transistor on
		BRAKE
5		FG OUT					Position detect signal: output 6 pulses per cycle
6		TFG					For setting FG OUT “L” level pulse width. R and C	F	pins.
							F
7		HC–					Motor position detect signal input pin (to Hall device)
8		HC+					Motor position detect signal input pin (to Hall device)
9		Hb–					Motor position detect signal input pin (to Hall device)
10		Hb+					Motor position detect signal input pin (to Hall device)
11		Ha–					Motor position detect signal input pin (to Hall device)
12		Ha+					Motor position detect signal input pin (to Hall device)
13		VCC2					Motor controller supply voltage pin
14		GND1					Motor controller IC GND pin; signal gnd (SG)
15		GND2					External RS GND-side connection pin; power gnd (PG)
16		Vref2					Current limiter set pin; 0.167VCC2 when open.
17		VS					External RS current limiter detect pin
18, 19		VRS					External RS connect pin
20, 21		U					Output pin (to motor winding)
22, 23		V					Output pin (to motor winding)
24, 25		W					Output pin (to motor winding)
26, 27		VCC1					Supply voltage pin (to motor)
28		VZ					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. 4345--3/11

STK6105

Sample Application Circuit

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 7-12. The signals input to pins 7-12 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.

ΝPWM ON Duty Vref1

Fig.1 PWM Drive Principle

No. 4345--4/11