AN2985

STEVAL-IFP010V3 demonstration board

Doc ID 15716 Rev 2

5/19

1

STEVAL-IFP010V3 demonstration board

1.1

Safety precautions

The board must be used only by expert technicians. The copper areas around the VNI2140J

device have a heat sink function, visible in the top layer layout view, refer to

Figure 8. In case

of short-circuit, current limitation or hard demagnetization, the STEVAL-IFP010V3 board, or

part of it, might reach a very high temperature with consequent danger.

No specific protections are implemented for a reverse DC accidental connection. Remember

that an electrolytic capacitor is connected to the supply bus, therefore a reverse continuous

DC voltage applied to it may produce a dangerous explosion.

Warning:

ST assumes no responsibility for any consequences which

may result from the improper use of this tool.

1.2

Description

The STEVAL-IFP010V3 demonstration board is composed of two main sections:

●

An opto-isolated interface for input and status signals

●

A two-channel self-protected power stage section with STMicroelectronics Transil™

diode protection.

The demonstration board consists of a double-sided FR4 printed circuit board with 35 µm

copper plating. The PCB dimensions are 52 mm X 68 mm. The top and bottom view are

shown in

Figure 3 and 4, respectively.

1.3

VNI2140J - device overview

The VNI2140J is a monolithic two-channel driver featuring a very low supply current. The IC,

which uses STMicroelectronics VIPower technology, is intended for driving loads with one

side connected to ground. Active channel current limitation, combined with thermal

shutdown (independent for each channel) and automatic restart, protect the device against

overload.

The main features of the VNI2140J IC are:

●

Output current: 1 A per channel

●

Shorted load protections for each channel

●

Junction overtemperature protection for thermal independence of the channels

●

Case overtemperature protection and restart are not simultaneous for the two channels

●

Protection against ground disconnection

●

Current limitation

●

Undervoltage shutdown