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Electrical characteristics of power stage, Table 4-2, Apply to operation at 25 – Motorola M68HC08 User Manual

Page 68: Hardware design, Freescale semiconductor, inc

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Hardware Design

Designer Reference Manual

DRM028 — Rev 0

68

Hardware Design

MOTOROLA

4.4.2 Optoisolation Board

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

Table 4-2. Electrical Characteristics of Power Stage

Characteristic

Symbol

Min

Typ

Max

Units

dc input voltage

Vdc

140

160

230

V

ac input voltage

Vac

100

208

240

V

Quiescent current

I

CC

70

mA

Min logic 1 input voltage

V

IH

2.0

V

Max logic 0 input voltage

V

IL

0.8

V

Input resistance

R

In

10 k

Analog output range

V

Out

0

3.3

V

Bus current sense voltage

I

Sense

563

mV/A

Bus voltage sense voltage

V

Bus

8.09

mV/V

Peak output current

I

PK

2.8

A

Brake resistor dissipation
(continuous)

P

BK

50

W

Brake resistor dissipation
(15 sec pk)

P

BK(Pk)

100

W

Total power dissipation

P

diss

85

W

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Freescale Semiconductor, Inc.

For More Information On This Product,

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