Description

The L9305 is a configurable, monolithic solenoid driver IC designed for the control

of linear solenoids for automatic transmission, electronic stability control, and active

suspension applications. The four channels can be configured as either low side

or high side drivers in any combination. The device includes the power transistor,

recirculation transistor and current sensing for both the power and recirculation

transistor. This architecture guarantees redundancy of the current measurement for

each channel.

The regulated current is programmable in the range of 0-1.5 A (normal range), with a

resolution of 0.25 mA, or 0-2 A (extended range), with a resolution of 0.33 mA. The

user can superimpose configurable dither modulation over the set point current.

Features

• AEC-Q100 qualified

• 4-channel independent LSD/HSD current controlled drivers

– Integrated current sense path

– Current accuracy (in normal range)

◦ ± 5 mA in 0 to 0.5 A range

◦ ± 1 in 0.5 A to 1.5 A range

– Current accuracy (in extended range)

◦ ± 15 mA in 0 to 0.3 A range

◦ ± 5 in 0.3 A to 0.5 A range

◦ ± 4 in 0.5 A to 2 A range

– Max driver RDSON 375 mΩ @ 175 °C

– 13-bit current set-point resolution

– Variable and fixed frequency current control

– Programmable dither function

– Selectable driver slew rate control

• Safety features

– High side fail safe ENABLE switch pre-driver with VDS monitoring

– Redundant safe enable path

– Advanced diagnosis and monitoring using BIST

– Temperature sensor and monitoring

– Redundant current sensing for all channels

– Calibration & configuration memory including CRC

– Secure serial communications using address feedback, 5-bit CRC, frame

counter & long/short frame detection

– Register verification

• 32-bit SPI communications with 5-bit CRC message verification

• Package options: PWSSO36, TQFP48

• Full ISO26262 compliant, ASIL-D systems ready