������������������������������� ���� �������������������������������������������������������������� � � � � � � � � � � � � � � � INTRODUCTION ASSEMBLY This easy-to-use kit provides a platform for the evaluation of PWM ampliﬁers using the SA03 pin-out conﬁguration. It can be used to analyze a multitude of standard or proprietary circuit conﬁgurations, and is ﬂexible enough to do most standard ampliﬁer test conﬁgurations. The board is designed for surface mounting all components except the switching ampliﬁer. The schematic is shown in Figure 2. Note that all of the components shown on the schematic will probably not be used for any single circuit. Some components will simply be omitted, while others require installation of a jumper to complete the signal path. Only components unique to the EK03 are provided in this kit. Hardware similar to that shown in ﬁgure 1 must be obtained locally. 1. From the non-silk screen side, insert and solder cage jacks. Be sure each one is fully seated. 2. From the non-silk screen side, push spacer grommets into PC board until fully seated. Grommets will snug when screws are inserted for heatsink mounting. 3. Apply TW05 thermal washer to the bottom of the ampliﬁer. 4. Use #14 sleeving to insulate and align at least 2 opposite pins of the ampliﬁer. 5. Mount ampliﬁer to heatsink using #6 screws and nuts. Torque the part to the speciﬁed 8 to 10 in-lbs (.9 to 1.13 N*M). Do not over torque. 6. Install components as needed. External connections may be soldered directly or standard banana jacks may be soldered to these pads. 7. Insert ampliﬁer pins into cage jacks and fasten board to heatsink. PARTS LIST Part # HS18 MS04 EVAL09 60SPG00001 TW05 OX7R105KWN Description Quantity Heatsink 1 PC mount Cage Jacks 1 Bag/12 each PC Board 1 Spacer Grommets 4 Thermal Washer 1 Box/10 each 1µF Cap 1825B105K201N, 6 Novacap BEFORE YOU GET STARTED * * * * * * All Apex ampliﬁers should be handled using proper ESD precautions. Always use the heatsink included in this kit with TW05 washer. Always use adequate power supply bypassing. Do not change connections while the circuit is powered. Initially set all power supplies to the minimum operating levels allowed in the device data sheet. Check for oscillations. �������������������������� ��������� ������������������ �������������� �������������������� ������������������� �������� �������������������������������� FIGURE 1. ������������������� ��������������������� APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] 1 EK03 EVALUATION KIT FOR SA03 PIN-OUT FIGURE 2. PCB SCHEMATIC. A block diagram of the ampliﬁer is shown in Figure 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 you may need to add a 10-50 uF or larger capacitor on the +Vs pin. This additional capacitor needs to be rated for switching operation. 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 banana jacks. ���� � � � ������������������������������������ APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 2 EK03 EVALUATION KIT FOR SA03 PIN-OUT FIGURE 3. FUNCTIONAL TEST CIRCUIT The schematic of Figure 3 can be used to verify the functionality of your ampliﬁer and help you gain a familiarity with proper operation. At either A Out or B Out, with respect to ground, you should observe a square wave approximately 30 V in amplitude with a ﬁxed frequency and duty cycle that varies from approximately 0 to 100% at a rate of 1 Hz. The current limit is set to 2 amps. ���� APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] 3 EVALUATION KIT FOR SA03 PIN-OUT EK03 FIGURE 4. PCB �������� ����� ��� ��� ����� ����� ��������� ��������� ���� �� � �� �� ��� ���� ������ ����� �� �� � ��� ��� ��� ��� �� ����� ���� ��� ��� ����� ���� ����� �� �� �� ��� ��� �� �� ���� ���� ��� ���� ��� ����� ����������� � This data sheet has been carefullyCORPORATION checked and is believed to be NORTH reliable, however, no responsibility is assumed for possible inaccuracies omissions. All speciﬁcations HOTLINE: are subject to1change notice. APEX MICROTECHNOLOGY • 5980 SHANNON ROAD • TUCSON, ARIZONA 85741 •orUSA • APPLICATIONS (800)without 546-2739 4 EK03U REV F JANUARY 2005 © 2005 Apex Microtechnology Corp.