Enpirion
®
Power Evaluation Board User Guide
EN2340QI
PowerSoC
Enpirion EN2340QI DC-DC Converter
w/Integrated Inductor Evaluation Board
Introduction
Thank you for choosing Altera Enpirion power products!
This evaluation board user guide applies to the EN2340 devices mounted on PCB’s with
the part number 06905 rev A, and three components on the backside. In addition to this
document, you will also need the latest device datasheet.
•
The EN2340QI features integrated inductor, power MOSFETS, controller, a bulk
of the compensation network, and protection circuitry against system faults. This
level of integration delivers a substantial reduction in footprint and parts count
over competing solutions. The evaluation board is optimized for engineering ease
of testing through programming options, clip leads, test points etc.
•
The EN2340QI features a customer programmable output voltage by means of a
resistor divider. The resistor divider allows the user to set the output voltage to
any value within the range 0.75V to 5V. The evaluation board, as shipped is
populated with a 4 resistor divider option. The upper resistor is fixed and has a
phase lead capacitor in parallel. One of the 4 lower resistors is selected with the
jumper option for different output voltages. To change V
OUT
, retain the upper
resistor and capacitor and change only the lower resistor.
•
The input and output capacitors are X5R or X7R multi-layer ceramic chip
capacitors. The Soft-start capacitor is a small value X7R MLCC. Pads are
available to have multiple input and output capacitors. This allows for evaluation
of performance over a wide range of input/output capacitor combinations.
•
Clip-on terminals are provided for ENA and POK. Banana jacks are provided for
12V
IN
, AVIN, and V
OUT
terminals. Several signal and GND clip-on test points are
also provided to measure V
IN
, V
OUT
, and GND nodes.
•
The Enable pin is pre-wired with a resistor divider to PVIN and GND according to
the datasheet recommendation. Enable may also be controlled by applying an
external signal to the ENA clip-on terminal.
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