Electrical Characteristics Of Power Stage; Hardware Design - Motorola M68HC08 Reference Manual

Hardware Design

4.4.2 Optoisolation Board
Designer Reference Manual
68
Freescale Semiconductor, Inc.
Table 4-2. Electrical Characteristics of Power Stage
Characteristic
dc input voltage
ac input voltage
Quiescent current
Min logic 1 input voltage
Max logic 0 input voltage
Input resistance
Analog output range
Bus current sense voltage
Bus voltage sense voltage
Peak output current
Brake resistor dissipation
(continuous)
Brake resistor dissipation
(15 sec pk)
Total power dissipation
Motorola's embedded motion control series optoisolation board links
signals from a controller to a high-voltage power stage. The board
isolates the controller, and peripherals that may be attached to the
controller, from dangerous voltages that are present on the power stage.
The optoisolation board's galvanic isolation barrier also isolates control
signals from high noise in the power stage and provides a noise-robust
systems architecture.
Signal translation is virtually one-for-one. Gate drive signals are passed
from controller to power stage via high-speed, high dv/dt, digital
optocouplers. Analog feedback signals are passed back through
HCNR201 high-linearity analog optocouplers. Delay times are typically
Hardware Design
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Symbol Min Typ
Vdc 140 160
Vac 100 208
I
— 70
CC
V
2.0 —
IH
V
— —
IL
R
— 10 k
In
V
0 —
Out
I
— 563
Sense
V
— 8.09
Bus
I
— —
PK
P
— —
BK
P
— —
BK(Pk)
P
— —
diss
Max Units
230 V
240 V
— mA
— V
0.8 V
—
3.3 V
— mV/A
— mV/V
2.8 A
50 W
100 W
85 W
DRM028 — Rev 0
MOTOROLA