EN6337QI/EN6347QI
Evaluation Board User Guide
Nov 2010
Page 1 of 9
Enpirion EN6337QI/EN6347QI DC-DC Converter
w/Integrated Inductor Evaluation Board
Introduction
Thank you for choosing Enpirion, the source for ultra small foot print power converter
products! This evaluation board user guide applies to two products with identical
pinouts: The EN6337QI is a 3A device, and the EN6347QI is a 4A device. The term
EN63x7QI will refer to both products throughout this document. This evaluation board
user guide applies to the EN63x7
−
03 engineering devices. In addition to this document,
you will also need the latest device datasheet.
•
The EN63x7QI 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 EN63x7QI 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 (V
IN
-V
DROPOUT
). 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 values and change only the lower resistor.
•
This device has no over-voltage protection feature. We strongly recommend the
customer to ensure the feedback loop is truly closed before powering up the
device especially if the load can not withstand the input voltage.
•
The input and output capacitors are X5R or X7R multi-layer ceramic chip
capacitors. The Soft-start capacitor is a small 15nF 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, SS, POK, and LLM pins.
•
Banana jacks are provided for V
IN
and V
OUT
power terminals. Several signal and
GND clip-on test points are also provided to measure V
IN
, V
OUT
, and GND nodes.
