Features

• Nominal current: 0.75 A per channel

• Shorted-load protections

• Junction overtemperature protection

• Case overtemperature protection for thermal independence of the channels

• Thermal case shutdown restart not simultaneous for the various channels

• Protection against loss of ground

• Current limitation 1 A per channel

• Undervoltage shutdown

• Open-load in OFF-state and short to VCC detection

• Open-drain diagnostic outputs

• 3.3 V CMOS/TTL compatible inputs

• Fast demagnetization of inductive loads

• Conforms to IEC 61131-2

Applications

• Programmable logic control

• Industrial PC peripheral input/output

• Numerical control machines

Description

The VNI2140J is a monolithic device designed using STMicroelectronics' VIPower

technology.

The device drives two independent resistive or inductive loads with one side

connected to ground. Active current limitation prevents a drop in system power

supply in cases of shorted-load, and built-in thermal shutdown protects the chip from

damage due to overtemperature and short-circuit.

In overload conditions, channel turns OFF and ON automatically to maintain the

junction temperature between TTSD and TR. If the case temperature reaches TCSD,

the overloaded channel is turned OFF and restarts only when case temperature

decreases down to TCR. In order to avoid high-peak current from the supply, when

more than one channel is overloaded the TCSD restart is not simultaneous. Non

overloaded channels continue to operate normally. The open-drain diagnostics output

indicates overtemperature conditions and open-load in OFF-state.