L9349-LF

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Design Win

Quad intelligent power low side switch

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Product overview

Description

The L9349 is a monolithic IC designed to drive inductive loads in low side configurations like hydraulic valves used in ABS systems.

Particular care has been taken to protect the device against failures, to avoid electromagnetic interferences and to offer extensive real time diagnostics.

The internal pull down current source at the ENable and INput pins assures, that the device is switched off, in case of open input conditions.

An output voltage slope limitation is implemented to reduce the EMI.

The device is equipped with an integrated Zener diodes clamp for fast inductive load current recirculation. This structure limits the output voltage during the recirculation phase to 50V.

The device is self-protected against short circuit at the outputs and overtemperature.

For the real time error diagnosis, the voltage and the current of the outputs are compared with internally fixed thresholds to recognize open load in OFF and ON conditions.

The output voltages are also compared with each other in OFF condition with a fixed offset, in order to recognize load bypasses.

If the over load current threshold is exceeded, the output current will be limited internally during the diagnostic overload delay switch-off time.

All four channels are monitored with a status output. The diagnostic output level in connection with different enable and input conditions allows it to recognize the different fail states.

  • All features

    • Electrostatic discharge (ESD) protection
    • Selective overtemperature shutdown
    • Overload disable
    • Load bypass detection
    • Four low-side output driver with protection diagnostics designed as a conventional switch2 channels with 5 A output current capability and rON = 0.2 typ.2 channels with 3 A output current capability and rON = 0.3 typ.
    • Output slope control
    • Integrated 60 V Zener diodes output clamping structure
    • Open load detection in ON and OFF condition
    • Signal and power ground loss shutdown
    • Short circuit protection

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L9349-LF

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9349-LF
NRND
PowerSO-20 Automotive Ecopack2
L9349TR-LF
Active
PowerSO-20 Automotive Ecopack2

L9349-LF

Package:

PowerSO-20

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

PowerSO-20

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9349TR-LF

Package:

PowerSO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-20

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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L9349-LF NRND

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Part Number:

L9349-LF

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L9349TR-LF Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
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ECCN (US):
ECCN (EU):

Part Number:

L9349TR-LF

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Min:

Max:

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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