EK01PC Apex Microtechnology Corporation, EK01PC Datasheet - Page 2

• Manufacturer Part Number: EK01PC
• Description: Evaluation Kit For Sa01 Pin-out
• Manufacturer: Apex Microtechnology Corporation

EK01
FIGURE 2. PCB SCHEMATIC.
TYPICAL COMPONENT FUNCTIONS
R12, 13, 15, 16 Provides voltage feedback for a voltage controlled output.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: [phone]
FEEDBACK
D1 – D4 Optional flyback diodes.
D5 – D7 Input protection zener diodes.
C10, 11 With R15 and R16 provides low pass filtering of voltage feedback.
C3, 4 With R7 forms a low pass filter for the external feed back loop. Often used with tachometers.
TACH/
R10 With R8 divides shutdown signal voltage feeding SHDN/FILTER pin.
R11 With C5 sets corner frequency for external feedback loop.
R14 Helps set gain or scale input voltage levels.
R17 With C12 provides low pass filtering of +IN signal.
C12 With R17 provides low pass filtering of +IN signal.
C13 Provides AC coupling of +IN signal.
GND
OUT
REF
R1 Provides -IN bias from the Reference voltage.
R2 Sets DC scaling for external feedback such as tachometers, position sensors or current sensors.
R3 With R4 sets DC operating point of +IN, with R13 and R15 sets gain of voltage feedback circuit.
R4 With R3 sets DC operating point of +IN.
R5 Input scaling of the control signal.
R6 With C6 sets the corner frequency of the integrator.
R7 With C3 & C4 forms a low pass filter for the external feedback loop. Often used with tachometers.
R8 With C2 forms a low pass filter for the current limit circuit.
R9 Current sense. Often is a piece of resistance wire.
C1 Power supply bypass.
C2 With R8 form a low pass filter for the current limit circuit, also filters the SHDN signal.
C5 With R11 sets corner frequency for external feedback loop.
C6 With R6 sets the corner frequency of the integrator.
C7 Power supply bypass, must have very low ESR in MHz range.
C8 Filters reference or feedback voltage at +IN.
C9 Bypass for the reference voltage.
SIG
–IN
+IN
11V
D6
C9
C3
R5
R7
R14
C13
D7
11V
R1
C4
R11
R4
C5
C12
R17
R2
R6
1
5
2
R3
C8
7.5V
–IN
REF
+IN
SA01
SHDN/
FILTER
EA
C6
R13
EA
OUT
10
R12
I
C2
3
SENSE
R8
C10
PWM
C11
8
7
+V
R9
S
GND
OUT
OUT
R16
R15
4
A
B
6
9
C1
D4
D5
11V
D1
D2
R10
C7
D3
FOR SA01 PIN-OUT
EVALUATION KIT
+V
A
B
GND
SHDN
SIG
OUT
OUT
S