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Apex Digital EK74 Quick Start Manual

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INTRODUCTION
This easy to use kit provides a platform with good circuit board layout and grounding to evaluate Power
Amplifier PA165. With additional prototype area, it is flexible enough to analyze a multitude of standard or
proprietary circuit configurations. All components are provided with the kit. The evaluation kit consists of a
PA165, which is mounted on a daughter board along with input protection diodes, power supply bypass
capacitors, and compensation capacitors.
The Evaluation kit also consists of few passive components and connectors that should be soldered on
the board. These components are not presoldered so as to provide flexibility to the user for changing ampli‐
fier configuration as per the users application.
TP1-1
RIN1
P1
-IN
2K
RT1
51
TP2-1
RIN2
P2
2K
+IN
RT2
51
TP15-1
P15
VTMP
TP14-1
N/C
P14
PDWN
N/C
TP13-1
P13
OCFLG
N/C
TP16-1
P16
+5V
TP17-1
P17
GND
HEATSINK_HS36_ECO_REG
www.apexanalog.com
Evaluation Kit
Figure 1: EK74 Circuit Configuration Diagram
RFB1
49.9 K
CFB1
10pF
11
11
12
12
13
13
14
14
15
15
-IN
16
ILIM-
16
PA165
+5V
ILIM+
+IN
17
17
PF2
GND
18
18
PF1
19
19
PF0
20
20
EVAL77 BOARD
J1B
RFB2
© Apex Microtechnology Inc.
All rights reserved
10
10
9
9
N/C
N/C
8
8
7
7
6
6
RLIM
RS
OUT
5
5
0.2 Ohm
4
4
3
3
2
2
1
1
J1A
EK74
TP3-1
P3
-VB
TP4-1
P4
GND
TP5-1
P5
-VS
C1
470uF
TP11-1
P11
OUT_1
TP10-1
+VS
P10
GND
D2
400V
TP12-1
RISO
P12
OUT_2
RN
D1
400V
CN
-VS
TP6-1
P6
+VS
TP7-1
C2
P7
470uF
GND
TP8-1
P8
+VB
Nov 2018
EK74 Rev A

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Summary of Contents for Apex Digital EK74

  • Page 1 The Evaluation kit also consists of few passive components and connectors that should be soldered on the board. These components are not presoldered so as to provide flexibility to the user for changing ampli‐ fier configuration as per the users application. Figure 1: EK74 Circuit Configuration Diagram TP3-1 RFB1 49.9 K...
  • Page 2 EK74 Figure 2: EVAL 164 PCB Layout Figure 3: EVAL 77 Circuit Configuration Diagram 3.3 pF 3.3 pF 0.1uF VTMP 0.1uF PDWN 0.1uF DUT1 OCFG ILIM- VTMP PA165PQ PDWN OCFLG ILIM- ILIM+ 0.1uF ILIM+ 0.1uF 0.1uF EK74 Rev A...

  • Page 3: Parts List

    146510CJ BNC Connector, PC Mount 91735A190 Screw, Panhead, #8 X 0.25” 91249A126 4‐40 Thread Size, 1‐1/2” Long 94758A101 18‐9 Stainless Steel Flange Nut, 4‐40 2221 Standoff, HEX, #8X 2.00” 571‐0100 Banana Jacks 5001 Test Point, PC mini EK74 Rev A...

  • Page 4: Before You Get Started

    9. #8 hex standoffs are also provided with the kit. Install the #8 x 0.25” screws (91735A190), provided with the kit, from the component side. Attach the standoffs to these screws on the corners of the board. EK74 Rev A...

  • Page 5: Equipment Needed

    P12 and P10. Input and output waveforms can be checked on an Oscilloscope by connecting it to the test points mounted on the board. Begin the test with minimum values of input and supply voltages. Figure 4: EK74 Build EK74 Rev A...
  • Page 6 EK74 Figure 5 and 6 show the input, output and over current flag waveforms when a PA 165 is evaluated using the EK74 evaluation kit. The yellow waveform (channel 1) represents an input signal of 4V and cyan wave‐ P‐P...
  • Page 7 SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnology, Inc. All other corporate names noted herein may be trademarks of their respective holders. EK74 Rev A...