DB64R APEX PRECISION POWER, DB64R Datasheet - Page 2

• Manufacturer Part Number: DB64R
• Description: 3 Phase Brushless DC Motor Driver Demo Board
• Manufacturer: APEX PRECISION POWER

Specifications of DB64R

• Silicon Manufacturer: Cirrus Logic
• Silicon Core Number: SA306
• Kit Application Type: Power Management - Motor Control
• Application Sub Type: DC Brushless Motor
• Kit Contents: Board Docs

DB64R
Figure 2 – User Control Features
Figure 2 shows the user control features of the DB64R.
The PWM duty cycle is controlled with the potentiometer
(1 in figure 2). The power LED (2) will illuminate when the
12V supply is connected. The DB64R will power up with
the SA306 disabled. The enable button (3) will toggle the
SA306 on and off with the LED (4) illuminating to indi-
cate the enable status. Direction of the motor is similarly
controlled with the button (5) and is indicated by the LED
(6).
The DB64R monitors the Temperature warning status pin
of the SA306. If this pin goes high an LED (7) illuminates
and the enable circuit is forced to a disable status. The
temperature LED is not latched and may stay illuminated
only briefly while the temperature of the SA306 is above
135ºC. The temperature decrease rapidly via the heatsink
once the SA306 is disabled.
The SA306 current limit feature is set to limit at approxi-
mately 15A to provide a demonstration of the full capabili-
ties of the SA306. An LED (8) will illuminate if the SA306
cycle-by-cycle current limit circuit engages. The thermal and current limit features are robust, but will not protect the
SA306 in all circumstances. The user must consider the worst case thermal and power dissipation conditions.
Hall Effect inputs to connector J3 (9) are required to commutate the motor correctly. Filtering networks and 5V pull-
up are provided for glitch-free operation. The Hall sensor connector, J3 (9), also includes a tachometer output which
is based on the commutation signals from the Hall inputs. Power for the Hall sensors is provided by U2 in figure 3,
an integrated brushless motor controller IC. The controller decodes the Hall sensor inputs and generates six PWM
control signals directly to the SA306. Push-button switches 1 and 2 trigger latches (U4) for direction and enable
control, respectively. Diodes D7 & D8 and resistors R24, 25, 29 & 30 provide a means of bypassing the DB64R
control circuit. The 5V regulator, U3, provides 5V to the SA306, the latches and the status LEDs.
2
P r o d u c t I n n o v a t i o n F r o m
3
5
4
6
10
1
11
9
2
7
8
DB64RU