L9352B

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4-channel valve driver

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Product overview

Description

The L9352B is designed to drive inductive loads in low side configurations like hydraulic valves used in ABS/ESC systems.

Integrated active Zener diodes clamp (for channel1 and 2) or free wheeling diodes (for channel 3 and 4) allow the recirculation of the inductive loads.

All four channels are monitored with a status output. All wiring to the loads and supply pins of the device are controlled. The device is selfprotected against short circuit at the outputs and overtemperature. For each channel, one independent push-pull status output is used for a parallel diagnostic function.

Channel 3 and 4 work as current controlled channels. The target value of the current is given by the duty cycle (DC) of the 2 kHz PWM input signal.

The output current is controlled through the output PWM of the power stage. The regulator limits of 10% or 90% are detected and monitored with the status signal. The current is measured during the recirculation phase of the load.

Using an external clock frequency of 250 kHz, the PWM output frequancy is 3.9 kHz.

A digital PI (proportional and integrating) regulator is performed in order to internally control the target current basing on the load current measurements.

  • All features

    • Regulator error control
    • Regulator drift detection
    • Electrostatic discharge (ESD) protection
    • External clock control
    • Ground and supply loss detection
    • Four low-side output driver with protection diagnostics.2 channels designed as conventional switch (rON = 0.2 typ.) with integrated 60 V Zener diodes clamp.2 current controlled channels (rON = 0.2 typ.) with current range from 0 mA to 2.25 A typ. with integrated recirculation diodes.
    • Short circuit protection
    • Output slope control
    • Open load and over load current detection
    • Recirculation path control
    • Selective overtemperature shutdown

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L9352B

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9352B-LF
Active
PowerSO 36 Automotive Ecopack2
L9352B-TR-LF
Active
PowerSO 36 Automotive Ecopack2

L9352B-LF

Package:

PowerSO 36

Material Declaration**:

PDF

Marketing Status

Active

Package

PowerSO 36

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9352B-TR-LF

Package:

PowerSO 36

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO 36

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors