DB64 Cirrus Logic Inc, DB64 Datasheet - Page 3

• Manufacturer Part Number: DB64
• Description: DEMO BOARD FOR SA306-IHZ
• Manufacturer: Cirrus Logic Inc
• Series: Apex Precision Power™r
• Type: MOSFET & Power Driverr

Specifications of DB64

• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: SA306
• Primary Attributes: 3-Ph DC Motors
• Secondary Attributes: 12V Supply, 1kW Peak Power, 17A Peak Current, Board can Dissipate 7-9W
• Input Voltage: 5 V
• Board Size: 95.25 mm x 44.45 mm
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Product: Power Management Modules
• Dimensions: 95.25 mm x 44.45 mm
• For Use With/related Products: SA306-IHZ
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1488

DB64
P r o d u c t I n n o v a t i o n F r o m
Figure 3 – Schematic
ENHANCING & BYPASSING THE DB64 CONTROL CIRCUIT
Connector J5 allows the user to bypass many of the manual control features of the DB64. A signal generator can
control the duty cycle with a 2.5 to 7.5V signal, overriding the control potentiometer. A rising 5V edge on pin 3 or 4 of
connector J5 will toggle the Direction or Enable latches, respectively. By jumping resistors R24 & R25, the latches
are bypassed completely and the logic signals on pins 3 & 4 will directly control the direction and enable functions
of the DB64. With these resistors jumped, the direction and enable LEDs will not represent the states of the DB64
and the pushbuttons will have no effect on the operation. The Temperature disable feature of the DB64 will also not
function, although the LED will continue to provide over-temperature status.
Connector J4 is connected directly to the PWM input pins of the SA306. This connector may be used to monitor the
signals or to bypass the control IC on the DB64. The enable function is not controlled via these pins, although pulling
all six input pins low provides the same effect. The Enable pushbutton and the connection via J5 are also effective
as previously described. The circuit shown in figure 3 in the dashed box is a simple circuit that allows the user to
monitor and control the enable or direction status remotely. Either feature can be toggled on the falling edge of the
signal at the node labeled TOGGLE.
LAYOUT CONSIDERATIONS
A simple two layer construction is sufficient because of the convenient pinout of the SA306 PowerQuad package.
Input signals are routed into one side of the package and high power output signals are routed from the other side in
2 ounce copper. This eliminates the need to route control signals near motor connections where noise may corrupt
the signals. Filling top and bottom layers with copper reduces inductive coupling from the high current outputs. 1nF
capacitors with excellent high frequency characteristics bypass the Vs motor supplies on each phase. Two 150μF
DB64U