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EVB-EN2360QI

P1-P3P4-P6P7-P9P10-P10
Enpirion
®
Power Evaluation Board User Guide
EN2360QI PowerSoC
Enpirion EN2360QI 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 EN2360 devices mounted on PCB’s with
the part number 06978 rev A, and three components on the backside. In addition to this
document, you will also need the latest device datasheet.
• The EN2360QI 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 EN2360QI 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 0.6V to 3.3V. 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.
Page 1 of 10
www.altera.com/enpirion
Enpirion
®
Power Evaluation Board User Guide
EN2360QI PowerSoC
• Foot print is also provided for a SMA connector to S_IN input. A switching input
to this pin allows the device clock to be phase locked to an external signal. This
external clock synchronization allows for moving any offending beat frequency to
be moved out-of-band. A swept frequency applied to this pin results in spread
spectrum operation and reduces the peaks in the noise spectrum of emitted EMI.
• A two pin header footprint is provided for the S_OUT pin. This signal can be used
to synchronize another EN2360 to the switching frequency coming out of the
S_OUT pin.
• The board comes with input decoupling and PVIN (12VIN) reverse polarity
protection to guard the device against common setup mishaps. Please note there
is no reverse polarity protection on AVIN input.
Quick Start Guide
STEP 1: This board has some additional components on the back side including a
resistor divider from PVIN to Enable to GND (indicated as NR1 & NR2 in the
schematic). As a result of these components, there is no need for a jumper on J3 (see
Figure 1), and the component FB1 (to the left of AVIN test point TP28) should not be
populated. Please contact Altera Power Applications support if your board does not
have these components added on the back side, or if FB1 is still populated.
Figure 1: Enable header without any jumpers
STEP 2: Connect the 12V nominal Power Supply to the input power connectors, 12VIN
(J7) and GND (J11) as indicated in Figure 4 and set the supply to the desired voltage.
CAUTION: Be mindful of the polarity. Even though the evaluation board comes
with reverse polarity protection diodes, it may not protect the device under all
conditions.
STEP 3: Make sure the two-in header J1 is properly populated depending on how you
want to power AVIN. If you want to use the device in a single input supply mode, and
use the on-chip AVINO pin, then populate J1 with a shorting jumper. If you want to
supply your own external AVIN, then remove the jumper from J1, and connect a 3.3V
nominal power supply to the AVIN (J9) and GND (J11).
Page 2 of 10
www.altera.com/enpirion
Enpirion
®
Power Evaluation Board User Guide
EN2360QI PowerSoC
CAUTION: With the resistor divider between PVIN and Enable and GND, if you
decide to supply an external AVIN, then AVIN has to be turned on before PVIN,
and turned off after PVIN. Not following this sequence can damage the device.
CAUTION: Be mindful of the AVIN input polarity. There is no reverse polarity
protection on this input.
CAUTION: Do not apply an external AVIN to the device with the J1 jumper
populated. Doing so will damage the device.
STEP 4: Connect the load to the output connectors VOUT (J6) and GND (J10), as
indicated in Figure 4.
STEP 5: Select the output voltage setting jumper. Figure 2 shows what output voltages
are achieved by selecting each jumper position. Note that depending on the tolerance of
the resistors populated on the board, each output voltage setting may have a larger
tolerance than just the VFB pin as specified in the datasheet. Please see Figure 5 and
the Bill of Materials section.
Figure 2: Output Voltage selection jumpers J5. Nominal jumper position voltages from left to
right are: 3.31V, 1.8V, 1.2V and 1.0V. Jumper shown selects 1.20V output. Do not
change jumper positions while the board is powered.
Please note: The loop compensation circuit for this version of evaluation board
has been chosen for a wide range of PVIN and V
OUT
values. In order to optimize
the loop for any specific PVIN/V
OUT
operating point, please see the compensation
table in the datasheet. See Figures 4 and 5.
STEP 6: Apply AVIN first, and then 12V
IN
if using dual supply mode. For single supply
mode, just apply 12V
IN
. The EN2360QI is now powered up since there is a resistor
divider from PVIN to Enable. Various measurements such as efficiency, line and load
regulation, input / output ripple, load transient, drop-out voltage measurements may be
conducted at this point. The over current trip level, short circuit protection, under voltage
lock out thresholds, temperature coefficient of the output voltage may also be measured
in this configuration.
Page 3 of 10
www.altera.com/enpirion
P1-P3P4-P6P7-P9P10-P10

EVB-EN2360QI

Mfr. #:
Buy EVB-EN2360QI
Manufacturer:
Intel / Altera
Description:
Power Management IC Development Tools EVAL FOR EN2360QI
Lifecycle:
New from this manufacturer.
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