Motorola M68HC08 Reference Manual page 73

4.6.1.1 Electrical Characteristics of the 3-Ph BLDC Low Voltage Power Stage
DRM028 — Rev 0
MOTOROLA
Freescale Semiconductor, Inc.
The LV BLDC power stage has both a printed circuit board and a power
substrate. The printed circuit board contains MOSFET gate drive
circuits, analog signal conditioning, low-voltage power supplies, and
some of the large passive power components. This board also has a
68HC705JJ7 microcontroller used for board configuration and
identification. All of the power electronics that need to dissipate heat are
mounted on the power substrate. This substrate includes the power
MOSFETs, brake resistors, current-sensing resistors, bus capacitors,
and temperature sensing diodes.
POWER
INPUT
SIGNALS
TO/FROM
CONTROL
BOARD
BOARD
ID BLOCK
The electrical characteristics in
a 12-Vdc supply voltage.
Hardware Design
For More Information On This Product,
Go to: www.freescale.com
Low-Voltage Hardware Set Components
Figure 4-5
BIAS
POWER
MOSFET
POWER MODULE
GATE
DRIVERS
PHASE CURRENT
PHASE VOLTAGE
BUS CURRENT
BUS VOLTAGE
MONITOR
BACK-EMF SENSE
Figure 4-6. Block Diagram
Table 4-6 apply to operation at 25 C with
Hardware Design
shows a block diagram.
BRAKE
ZERO CROSS
Designer Reference Manual
TO
MOTOR
73