L6375STR datasheet(8/17 Pages) STMICROELECTRONICS

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Electrical specifications

L6375S

8/17

2.4

Switching waveform

Figure 3.

Switching waveform

2.5

Input section

An Single ended Input TTL/CMOS compatible with wide voltage range and high noise

immunity (thanks to a built in hysteresis) is available.

2.6

Over temperature protection (OVT)

An on-chip Over Temperature Protection provides an excellent protection of the device in

extreme conditions. Whenever the temperature - measured on a central portion of the chip

exceeds Tmax = 150

oC (typical value) the device is shut off, and the DIAG2 output goes

LOW. Normal operation is resumed as the chip temperature (normally after few seconds)

falls below Tmax - Thys = 130

oC (typical value). The hysteresis avoid that is an intermittent

behavior take place.

2.7

Under voltage protection (UV)

The supply voltage is expected to range from 8 to 35V. In this range the device operates

correctly. To avoid any misfunctioning the supply voltage is continuously monitored to

provide an under voltage protection. As Vs falls below Vsth-Vshys (typically 7.5 V, see fig.1)

the output power MOS is switched off and DIAG1 and DIAG2 (see Diagnostic truth table).

Normal operation is resumed as soon as Vs exceeds Vsth. The hysteretic behavior prevents

intermittent operation at low supply voltage.

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