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Enpirion

®

 Power Evaluation Board User Guide 

EP53A8xQI PowerSoC 

Enpirion EP53A8xQI DC/DC Converter 

Module Evaluation Board 

 

Introduction 

 

Thank you for choosing Altera Enpirion  power products! 
 
This application note describes how to test the EP53A8LQI and the EP53A8HQI 
converters using the  Altera  Enpirion  EP53A8QI  Eval Board  shown in Fig. 1.  In 
addition to this  document you will also need the device datasheet  for a thorough 
evaluation  of the power converter module.  
 
The EP53A8xQI  converters are a complete power system on chip or PowerSoC. 
 

  These devices are  complete modules  including magnetics, and require 

only ceramic input and output capacitors. 

  The evaluation board is designed to offer a wide range of engineering 

evaluation capabilities.  This includes the base configuration of a  0603 
input capacitor and a 0805 output capacitor. 

  Pads are available to add up to one additional input capacitor and one 

additional output capacitor  for evaluation of performance over a wide 
range  of input/output  capacitor combinations. 

  Pads are available to populate an external voltage  divider  (for feedback)  if 

desired.  The pads are labeled R1 and R2. Pads are also available for 
placing an optional  feed-forward capacitor (labeled C9) across resistor R1 
to modify the compensation. 

  Jumpers are provided for easy programming of the following  signals: 

o

  Enable 

o

  VS0-VS2  output voltage selection pins 

  Test points are provided as well as clip leads for input and output 

connections 

  The board comes with input decoupling,  and  input  reverse polarity 

protection to safeguard  the device from common setup mishaps. 

 

 
 
 
 
 
 
 

 

 

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www.altera.com/enpirion

 

Summary of Contents for EP53A8LQI

Page 1: ...ering evaluation capabilities This includes the base configuration of a 0603 input capacitor and a 0805 output capacitor Pads are available to add up to one additional input capacitor and one addition...

Page 2: ...ged If the input voltage polarity is wrong diode D1 will conduct and draw excessive input current STEP 3 Set the output voltage select pins for the desired output voltage Refer to Tables 1 and 2 to de...

Page 3: ...VSx jumpers to either logic 1 or logic 0 as described in the Quick Start section Tables 1 and 2 show the truth table for VOUT selection There are seven preset output voltage levels for the EP53A8LQI a...

Page 4: ...ters or accurate shunt resistors This is especially important when measuring efficiency 3 Use a low loop inductance probe tip as shown in Figure 2 and through hole test point pair TP2 to measure the o...

Page 5: ...an output voltage other than one of the pre set voltages available on the VID See Figure 3 for the basic circuit VIN VSense VS0 VS2 EP53A8L 10 F 0805 4 7uF 0603 VOUT VOUT AGND ENABLE Ra Rb VFB VS1 PG...

Page 6: ...matic R3 100 0402 C10 10u FB1 742792012 TP2 1 2 TP1 1 2 Schematic 03400 PCB 03401 J1 ASP12192002 1 2 3 5 6 7 9 10 11 13 14 15 17 18 19 Vin Vout Vin U1 EP53A8xQI NC SW 1 1 PGND 2 PGND 3 Vf b 4 Vsense 5...

Page 7: ...re the property of their respective holders as described at www altera com common legal html Altera warrantsperformance of itssemiconductor products to current specifications in accordance with Altera...

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