3
Connectors and test points
3.1
V
IN
- FS1
This is the V
IN
connector. To use it, connect the supply voltage from 6 to 75 V. This voltage becomes the device
V
IN
after an EMI filter (see
for further details).
The supply voltage should be set with a current limitation compatible with the power board request. Typically:
Ilim > VOUT/VIN × IOUT
V
IN
should be connected to the power source with a short wire to avoid oscillations between the cable parasitic
inductance and the input ceramic capacitor.
3.2
GND - FS2
This is the return of the terminal of the input and output capacitors. We suggest using a short wire to avoid
oscillations between the cable parasitic inductance and the input capacitor.
3.3
V
OUT
- FS4
This is the V
OUT
connector and test point. Connect the active load or power resistor between V
OUT
and GND test
point. We suggest using short wires for the connection.
3.4
Signal manager - J5
•
Pin 1–VCC: output pin. You can monitor the V
CC
pin voltage (driver supply voltage).
•
Pin 2–SYNCIN: input pin. You can change the switching frequency through an external waveform generator.
You can set the frequency between 50% F
SW
and 120% F
SW
.
•
Pin 3–AGND: signal GND.
•
Pin 4–SYNCOUT: output pin. A rectangular waveform is generated from this pin. It implements a 180° phase
shifted referred to the HO driving signal. It can be useful for synchronization with others power system
(check the
datasheet for further details).
•
Pin 5 - PGOOD: output signal. It is an open collector. It is short to GND once V
OUT
is out of the regulator
windows (±8%). Otherwise, it is short to the external pull-up voltage. In the
up to the V
CC
pin.
•
Pin 6–TRIM: connect to GND ( short to pin 7 through a jumper) to select V
OUT1
. Leave the pin floating to
select V
OUT2
. In the
, V
OUT1
is set to 12.18 V and V
OUT2
is set to 5.07 V.
•
Pin 7–AGND: signal GND. Used to short pin6 to GND and changeV
OUT
. See pin 6 description.
•
Pin 8 - SS/TRK: output pin. You can monitor the soft start ramp. The pin voltage is clamped at 115 mV over
the FB voltage (see the
datasheet for further details).
•
Pin 9–EN/Uvlo: input signal. You can turn on and off the system with an external signal (see the
datasheet for further details). By default, it is connected to a partition of V
IN
. The system turns on once
V
IN
>14.5 V.
•
Pin 10 - AGND: signal GND.
UM3024
Connectors and test points
UM3024
-
Rev 1
page 4/24
