Electrical specifications

L9386

10/14

2.4

Circuit description

The L9386 is a dual low side driver for inductive loads like valves in automotive environment.

The device is enabled by a common CMOS compatible ENABLE high signal. The internal

pull down current sources at the ENABLE and INPUT pins protect the device in open input

conditions against malfunctions. An output slope limitation for du/dt is implemented to

reduce the EMI. An integrated active flyback voltage limitation clamps the output voltage

during the flyback phase to 50V.

Each driver is protected against short circuit and thermal overload. In short circuit condition

latched until a negative slope occur at the correspondent input pin. The thermal disable for

below the disable threshold temperature.

For the real time error diagnosis the voltage and the current of the outputs are compared

extended supply voltage range of 4.5 V

≤ V

fixed offset of

ΔVO

during the flyback phases of the compared output, the

ΔVO diagnostic

is resetted by a latch. To activate again this kind of diagnostic a low signal at the

correspondent INPUT or the ENABLE pin must occur (see also Figure 5).

The diagnostic output level in connection with different ENABLE and INPUT conditions

allows to recognize different fail states, like overtemperature, short to VSS, short to GND,

bypass to GND and disconnected load (see also Table 5 on page 6).