DB63R APEX PRECISION POWER, DB63R Datasheet - Page 2

• Manufacturer Part Number: DB63R
• Description: DC Brush Motor Driver Demo Board
• Manufacturer: APEX PRECISION POWER

Specifications of DB63R

• Silicon Manufacturer: Cirrus Logic
• Silicon Core Number: SA57
• Kit Application Type: Power Management - Motor Control
• Application Sub Type: DC Brushed Motor
• Kit Contents: Board Docs

DB63R
Figure 2 shows the user control features of the DB63R.
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 DB63R will power up
with the SA57 disabled. The enable button (3) will toggle
the SA57 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 DB63R monitors the Temperature warning status pin
of the SA57. 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 SA57 is above
135ºC. The temperature decrease rapidly via the heatsink
once the SA57 is disabled.
The SA57 current limit feature is set to limit at approxi-
mately 15A to provide a demonstration of the full capabili-
ties of the SA57. An LED (8) will illuminate if the SA57
cycle-by-cycle current limit circuit engages. The thermal
and current limit features are robust, but will not protect
the SA57 in all circumstances. The user must consider the worst case thermal and power dissipation conditions.
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 DB63R control circuit. The 5V regulator, U3, pro-
vides 5V to the SA57, 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
Figure 2 – User Control Features
5
3
6
4
10
1
11
7
2
8
DB63RU