Firmenblog über Mingjiada Supply ST L99DZ300GTR Door Zone System IC - Automotive Front Door Device

Mingjiada Supply ST L99DZ300GTR Door Zone System IC - Automotive Front Door Device

In today’s rapidly evolving landscape of automotive electronics and intelligent systems, door control systems—as a core component of vehicle body electronics—face ever-increasing demands for integration, communication capabilities, stability and safety. The ST (STMicroelectronics) L99DZ300GTR, as a new-generation automotive-grade system-on-chip (SoC) specifically designed for front doors, integrates dual CAN FD and LIN communication interfaces alongside multi-channel drive and protection circuits, making it the preferred choice for door modules in mid-to-high-end internal combustion engine and new energy vehicles.

Shenzhen Mingjiada Electronics Co., Ltd. – with nearly 30 years of deep expertise in the automotive electronics supply chain – offers stock of genuine ST L99DZ300GTR door zone system ICs for automotive front door assemblies supporting CAN FD and LIN. We provide sample procurement, bulk supply and technical support services to help customers efficiently advance the R&D and mass production of door control systems.

I. Product Overview:
The L99DZ300GTR is a door zone system integrated circuit (IC) that provides enhanced power management functions for electronic control modules, including multiple standby modes, as well as LIN and CAN FD physical communication layers.
The L99DZ300GTR is equipped with two low-dropout regulators to supply power to external peripheral loads such as system microcontrollers and sensors, and features programmable local and remote wake-up functions, thereby enhancing the system’s standby performance. Furthermore, 10 high-side drivers (9 for driving LEDs and 1 for driving bulbs) improve system integration; all high-side drivers support constant-current mode, making them suitable for LED modules with high input capacitance. Up to 5 DC motors and 4 external MOSFETs in an H-bridge configuration can be driven, with a maximum PWM operating frequency of 25 kHz.

II. Key Core Features (L99DZ300GTR)
1. Dual-bus communication, compatible with in-vehicle high-speed networks
Integrated CAN FD transceiver: The L99DZ300GTR is compatible with CAN 2.0, supporting higher transmission rates and larger data payloads to meet the high-speed communication requirements of smart doors, in-vehicle gateways and body domain controllers.
Integrated LIN 2.2A transceiver: The L99DZ300GTR is compatible with low-speed body networks, enabling cost-effective communication between door modules and body ECUs whilst ensuring redundancy and compatibility.
2. Multi-channel, highly integrated drivers covering all door functions
6-channel half-bridge drivers: comprising 1 x 7.5A, 1 x 6A, 2 x 3A and 2 x 0.5A channels, supporting PWM modulation (up to 25kHz), capable of driving 5 DC motors and 4 external MOSFETs, and suitable for core functions such as window lifting, wing mirror folding/adjustment and door lock actuation.
10-channel high-side drivers: 9 channels for LEDs (supporting constant-current mode) and 1 channel for incandescent bulbs, covering loads such as door lights, ambient lighting and rear-view mirror defrosting/heating; all feature open-circuit detection and short-circuit protection.
Integrated with 2-channel LDOs and an electrochromic glass control module, supporting advanced functions such as rear-view mirror anti-glare and heating.
3. Comprehensive Protection + SPI Diagnostics, Safe and Controllable
All output channels of the L99DZ300GTR feature fast short-circuit protection, as well as overcurrent, overvoltage and over-temperature protection. In the event of a fault, the circuit is automatically disconnected and diagnostics are triggered to prevent device burnout.
Standard SPI 4.0 interface: supports parameter configuration, real-time status reading and fault diagnostics, facilitating universal software development and reducing system debugging complexity

III. Typical Application Scenarios
The L99DZ300GTR is specifically designed for automotive front door control modules (DCMs) and is widely compatible with:
Front door systems in mid-to-high-end petrol vehicles, hybrid and pure electric vehicles;
Door mirrors: electric folding, XY-axis adjustment, heating and defrosting, anti-glare control;
Windows: lift/lower drive, anti-pinch protection;
Door locks: central locking, security lock actuation;
Door zone loads: LED ambient lighting, reading lights, mirror heating, EC glass control

IV. Mingjiada Electronics Supply Services
Long-term Stocking — We maintain stock of the full range of ST automotive-grade PMICs and gate driver ICs; L99DZ300GTR items in stock are available for same-day dispatch
Quality Assurance — Genuine chips and strict supply chain management ensure the stability and reliability of our products
Global Delivery — We support procurement for both domestic and overseas customers, offering a one-stop order fulfilment service

V. Conclusion
With its high integration, dual-bus communication, strong drive capability and comprehensive safety protection, the ST L99DZ300GTR has become the benchmark chip for automotive front door control systems, helping car manufacturers achieve simplified, efficient and intelligent upgrades to their door electronic systems.
Mingjiada Electronics supplies genuine ST L99DZ300GTR chips from stock, supporting both small-batch samples and large-volume orders. Leveraging an efficient logistics system, we ensure rapid product delivery.

For enquiries regarding the price, stock availability or procurement of samples of the ST L99DZ300GTR, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.