EK18 Apex Microtechnology Corporation, EK18 Datasheet - Page 3

• Manufacturer Part Number: EK18
• Description: Evaluation Kit For Sa18 Pin-out
• Manufacturer: Apex Microtechnology Corporation

EVALUATION KIT
FOR SA18 PIN-OUT
FIGURE 2. PCB SCHEMATIC.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]
12
1000pf
1
1k
50
CLK IN
Ra
R2
TL
5V
910
J1
.01 F
.1V
A OUT
10V
f/2
11
2
CLK OUT
50k
10V
10V
470pF
CLOCK
5V
56k
Vcc
CVcc
5V
R4
+PWM
Vcc
10
3
BRIDGE
DRIVER
Vcc
+ PWM
H
CVs1-3
C1
RAMP/-PWM
FLAG
+ Vs
OR
9
4
FLAG
+ Vs
C2
SA18
B OUT
GND
SIG
8
5
GND I Lim /SHDN
OUT
R1
PWR
GND
7
6
Rb
PWR
R3
GND
C3
I LIM /SHDN
D1
2 along with pcb connections of all the commonly
used external components. Your application circuit
will not use all of the components. Add those
components required by your circuit. You may
have to jumper some components to make the
desired electrical connections. J1 is an optional
way to connect the clock circuit. Power supply
bypassing is particularly important and that is why
high quality ceramic chip capacitors are supplied
with the kit. In addition, a large electrolytic capacitor
is included. This capacitor was selected expressly
for this evaluation kit and may not be (and likely
won't be) suitable for your end application. You will
need to select an electrolytic capacitor based on
your analysis of the capacitor's ripple current, ripple
current tolerance, operating temperature, operat-
ing voltage, acceptable service life and acceptable
supply ripple. Note that the signal ground and
power ground are separated and tie together only
at the ground pin (5). A breadboarding area is
supplied which can accomodate 1 or 2 IC amplifiers
and associated components. The large terminal
pads can be used to solder wire connections or
bannana jacks.
circuit board as the EK15 Evaluation Kit intended
for the apex model SA08. As such the designations
on the PCB are those for the SA08. The SA18 is a
half bridge version of the SA08 and the SA18 is
identical in design except for that fact. Some of the
SA18 pin designations are, however, different. The
SA18 OUT pin is equivalent to the SA08 B OUT pin.
Pin 7 (PWR GND) of the SA18 is equivelent to the
Isense B pin on the SA08. A OUT on the terminal
block is not used for the SA18. See the data sheet
for the SA18 for specific operating considerations.
A block diagram of the SA18 is shown in Figure
Note that the EK18 Evaluation Kit uses the same
EK18