PBL 3771/1

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General

Phase inputs. A logic HIGH on a Phase

input gives positive current flowing out

from M

current in the opposite direction.

Slow/fast current decay. A logic HIGH

on the CD input gives slow current

decay, a logic LOW gives fast current

decay.

Heat sinking. Soldering the four center

pins onto a free PCB copper area of 20

thickness = 35

µm) permits the circuit to

operate with a maximum of 320 mA

output current, both channels driving, at

ambient temperatures up to +70

°C.

Consult figures 12 and 13 in order to

determine the necessary copper area for

heat sinking if higher currents are

required.

Thermal shutdown. The circuit is

equipped with a thermal shutdown

function that reduces the output current

at chip temperatures above +160

°C.

Operating temperature. The max re-

commended operating temperature is

125

°C. This gives an estimated lifelength

of about 5 years at continous drive, A

change of

±10° would increase/decrease

the lifelength of the circuit with about 5

years.

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Figure 9. Typical source saturation

voltage vs. output current.

Figure 8. Typical upper diode voltage

drop vs. recirculating current.

Figure 10. Typical lower diode voltage

drop vs. recirculating current.

Figure 11 Typical sink saturation voltage

vs. output current.

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Figure 12. Power dissipation vs. motor current, both channels driven, T

Max allow power dis