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EVB-EN6337QI

P1-P3P4-P6P7-P9
Enpirion
®
Power Evaluation Board User Guide
EN6337QI/EN6347QI PowerSoC
Enpirion EN6337QI/EN6347QI DC-DC Converter
w/Integrated Inductor Evaluation Board
Introduction
Thank you for choosing Altera Enpirion power 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.
Page 1 of 9
www.altera.com/enpirion
Enpirion
®
Power Evaluation Board User Guide
EN6337QI/EN6347QI PowerSoC
• A jumper is provided for controlling the Enable signal. Enable may also be
controlled using an external switching source by removing the jumper and
applying the enable signal to the ENA clip-on terminal.
• A jumper is also provided to connect the POK pull-up resistor to the input supply.
This jumper is especially useful to measure the disable current and eliminates
having to subtract the current drawn by the POK resistor.
• A jumper is provided for controlling the LLM/SYNC pin. This pin can be high for
automatic LLM (light-load mode) operation. If it is pulled low, the part will be in
PWM mode only.
• Foot print is also provided for a SMA connector to LLM/SYNC 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.
• The board comes with input decoupling and reverse polarity protection to guard
the device against common setup mishaps.
Quick Start Guide
STEP 1: Set the “ENABLE” jumper to the Disable Position, as shown in Figure 1.
Figure 1: Shows POK, Enable, and LLM Jumpers. POK PWR jumper
as shown connects pull-up resistor to VIN. Enable jumper shown in
DISABLE position. LLM jumper as shown disables LLM operation.
STEP 2: Connect Power Supply to the input power connectors, VIN (+) and GND (-) as
indicated in Figure 1 and set the supply to the desired voltage. The device disable
current may be measured in this configuration.
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.
Page 2 of 9
www.altera.com/enpirion
Enpirion
®
Power Evaluation Board User Guide
EN6337QI/EN6347QI PowerSoC
STEP 3: Connect the load to the output connectors VOUT (+) and GND (-), as
indicated in Figure 1.
STEP 4: Select the output voltage setting jumper. Figure 2 shows what output voltages
are achieved by selecting each jumper position. Populating multiple jumper positions
will allow you to select higher output voltages. You can populate up to all four jumper
positions for the highest V
OUT
of approximately 3.73V with the resistors populated on the
board.
Figure 2: Output Voltage selection jumpers
Jumper shown selects 1.55V output
(Jumper positions from left to right are: 2.25V, 1.55V, 1.2V and 1.0V)
STEP 5: Set the POK PWR and LLM jumpers to desired positions (see Figure 1). You
should disable POK when measuring low value input currents.
STEP 6: Apply V
IN
to the board and move the ENA jumper to the enabled position. The
EN63x7QI is now powered up! 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.
CAUTION: The maximum allowable VIN for this version of devices is 6.6V.
STEP 6A: Power Up/Down Behavior – Remove ENA jumper and connect a pulse
generator (output disabled) signal to the clip-on test point below ENA and Ground. Set
the pulse amplitude to swing from 0 to 2.5 volts. Set the pulse period to 10msec. and
duty cycle to 50%. Hook up oscilloscope probes to ENA, SS, POK and VOUT with clean
ground returns. Apply power to evaluation board. Enable pulse generator output.
Observe the SS capacitor and VOUT voltage ramps as ENA goes high and again as
ENA goes low. The device when powered down ramps down the output voltage in a
controlled manner before fully shutting down. The output voltage level when POK is
asserted /de-asserted as the device is powered up / down may be observed as well as
the clean output voltage ramp and POK signals.
Page 3 of 9
www.altera.com/enpirion
P1-P3P4-P6P7-P9

EVB-EN6337QI

Mfr. #:
Buy EVB-EN6337QI
Manufacturer:
Intel / Altera
Description:
Power Management IC Development Tools 3A VM Syn Bck PWM DC-DC Con,Int Induct
Lifecycle:
New from this manufacturer.
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