Enpirion
®
Power Evaluation Board User Guide
EN6360QI PowerSoC
STEP 5:
Connect Power Supply to the input power connectors, VIN (J7) and
GND (J11) as indicated in Figure 4 and set the power supply to the desired
voltage (≤6.6V.)
CAUTION
:
Be mindful of the polarity. Even though the evaluation board
comes with reverse polarity protection diodes, it is rarely a good idea to
reverse the input polarity.
STEP 6:
Connect the load to the output connectors VOUT (J6) and GND (J10),
as indicated in Figure 4.
STEP 7:
Power up the board and move the ENA jumper to the enabled position.
The EN6360QI is now powered up and generating the desired output. You are
free to make Efficiency, Ripple, Line/Load Regulation, Load transient, Power OK,
over current limit and temperature related measurements.
STEP 7A: Power Up/Down Behavior
– Remove ENA jumper and connect a
pulse generator (output disabled) signal to the middle pin of ENA and Ground.
Set the pulse amplitude to swing from 0 to 2.5 volts. Set the pulse period to
10msec., duty cycle to 50% and fast transition (<1usec.) Hook up oscilloscope
probes to ENA, POK and V
OUT
with clean ground returns. Enable pulse generator
output. Observe the V
OUT
voltage ramps as ENA goes high and again as ENA
goes low.
STEP 8: Phase Lock
– Disable device by moving ENA jumper. Power down the
device. Connect a pulse generator (properly terminated and output disabled)
signal between S_IN and GND, preferably using an SMC connector. Set the
pulse amplitude to swing from 0 to 2.5 volts. Set the pulse frequency to the
converter’s free running frequency. Connect oscilloscope probes to S_IN and
S_OUT. Power up device. Enable device. Note S_OUT – it is the free running
switching frequency. Now enable the pulse generator output. S_OUT should be
locked to S_IN with a fixed delay. Sweep the clock frequency and note the lock
range at both extremes.
ALWAYS power down device before changing board level components!
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