108

5-Phase Stepper Motor Driver ICs (Pentagon Connection)

−40

0

50

100

150 (

°C)

15

10

5

0

Ambient temperature Ta

(W)

50×

50×

2 mm

AI

FIN

N0

FIN

Fig. E SLA5011/SLA6503 Derating curve

sMotor Connection

The 5-phase stepper motor supports various driving systems

and the motor connection varies depending on the driving sys-

tem 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 cur-

rent) 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 de-

°C; however, when using this de-

vice, allow sufficient margin when selecting a heatsink so that

≤100°C (AI FIN temperature on the back of the SLA) is ob-

tained.

Substances that can dissolve

the package

Substances that can weaken

the package

SI-7502

sHandling Precautions

Refer to the product specifications.

Solvents- Do not use the following solvents:

Chlorine-based solvents: Trichloroethylene, Trichloroethane, etc.

Aromatic hydrogen compounds: Benzene, Toluene, Xylene, etc.

Keton and Acetone group solvents

Gasoline, Benzine, Kerosene, etc.