Motorola M68HC08 manual Electrical Characteristics of Power Stage, Optoisolation Board

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Hardware Design

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	ICC	—	70	—	mA
Min logic 1 input voltage	VIH	2.0	—	—	V
Max logic 0 input voltage	VIL	—	—	0.8	V
Input resistance	RIn	—	10 kΩ	—
Analog output range	VOut	0	—	3.3	V
Bus current sense voltage	ISense	—	563	—	mV/A
Bus voltage sense voltage	VBus	—	8.09	—	mV/V
Peak output current	IPK	—	—	2.8	A
Brake resistor dissipation	PBK	—	—	50	W
(continuous)
Brake resistor dissipation	PBK(Pk)	—	—	100	W
(15 sec pk)
Total power dissipation	Pdiss	—	—	85	W

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

Designer Reference Manual		DRM028 — Rev 0
68	Hardware Design	MOTOROLA
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