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.
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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 switch
2 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
All resources
| Resource title | Latest update |
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Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 19 Sep 2016 | 19 Sep 2016 |
Application Notes (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 24 Mar 2020 | 24 Mar 2020 | |||
| 24 Mar 2020 | 24 Mar 2020 |
User Manuals (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 01 Nov 2019 | 01 Nov 2019 |
Selection Guides (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 02 Mar 2021 | 02 Mar 2021 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L9349-LF
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Symbols
Footprints
3D models
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 |
(**) 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.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L9349-LF | No availability of distributors reported, please contact our sales office | NRND | EAR99 | NEC | Tube | PowerSO-20 | -40 | 150 | MALAYSIA | 1.8 / 1k | ||
| L9349TR-LF | 2 distributors | Buy Direct | Active | EAR99 | NEC | Tape And Reel | PowerSO-20 | -40 | 150 | MALAYSIA | 1.8 / 1k | |
Marketing Status
NRNDECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.8 / 1k(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
