ST UM2727, Getting Started, Page: 4 / 15

1.1.2 Power section
The power section involves the power supply voltage (CN1, pin 2 and 3 for V
CC
, pin 4 for GND), load connection
(between CN1 pins 1-4 and CN1 pins 5-4) and electromagnetic compatibility (EMC) protection.
Figure 3. X-NUCLEO-OUT03A1 expansion board: power stage components
1. Output channel 1 - fault red LED
2. Output channel 2 - fault red LED
3. Output channel 1 - green LED
4. Output channel 2 - green LED
5. IPS2050H
6. Output and power supply connector
1
2
5
3
4
6
For EMC:
•
The SM15T39CA transient voltage suppressor (TR1), enabled by closing JP3, is placed between V
CC
and
GND tracks to protect the IPS2050H against surge discharge on the supply rail path up to ±1kV/2Ω coupling;
• in common mode surge testing, two single-layer capacitors (C1 and C2 - not included) must be soldered at
the predisposed locations;
• the IPS2050H output stages do not require additional EMC protections with respect to the IEC61000-4-2,
IEC61000-4-3, IEC61000-4-5 standards.
UM2727
Overview
UM2727 - Rev 1
page 4/15