company blog about Mingjiada Supply TI TPS92638 Automotive 8-Channel Linear LED Driver, Enabling Smart Headlight Upgrades

Mingjiada Supply TI TPS92638 Automotive 8-Channel Linear LED Driver, Enabling Smart Headlight Upgrades

As the trend towards smarter and more high-end vehicles accelerates, in-vehicle lighting systems are no longer confined to basic illumination functions but are evolving towards greater precision, intelligence and stability. Lighting modules for various scenarios—such as ambient lighting, daytime running lights, tail lights and interior lighting—place higher demands on driver chips in terms of the number of channels, dimming accuracy and safety protection ratings.

Shenzhen Mingjiada Electronics Co., Ltd. — with extensive experience in the automotive electronic components supply chain — now supplies the Texas Instruments (TI) TPS92638 (part number TPS92638QPWPRQ1) 8-channel automotive linear LED driver, providing one-stop, genuine original equipment manufacturer (OEM) supply support for applications such as daytime running lights, tail lights, brake lights, fog lights and interior lighting.

The TPS92638 is an eight-channel linear LED driver featuring PWM dimming control. Its design is ideally suited for driving multiple LED strings within the medium-power range. The TPS92638 can drive up to eight strings, with one to three LEDs per string, and a total current of up to 70mA per channel. By connecting multiple outputs in parallel, a drive current of up to 560mA can be achieved.

Eight independent channels for flexible adaptation to a wide range of automotive lighting designs
As a dedicated 8-channel LED driver, the TPS92638 can independently drive eight LED strings, with each string capable of accommodating one to three LED chips. The maximum output current per channel is 70mA, fully meeting the power requirements of low- to medium-power automotive LED lighting. The TPS92638 supports parallel expansion of multi-channel outputs, with a maximum drive current of 560mA when configured in parallel. This allows for flexible adaptation to lighting modules of various specifications, such as high-power tail lights, full-width lighting and multi-zone interior ambient lighting, offering exceptional versatility.
Furthermore, the TPS92638 boasts excellent channel current matching accuracy with extremely low current error, effectively ensuring uniform brightness across all vehicle lights. This eliminates issues such as uneven illumination and flickering, significantly enhancing the visual quality of in-vehicle lighting and aligning with contemporary design aesthetics for high-end automotive interiors and exterior lighting.

Wide-Voltage Compatibility + Dual-Mode Dimming: Adapting to Complex In-Vehicle Conditions
Voltage fluctuations are frequent in automotive electrical environments, placing extremely high demands on the voltage stability of driver ICs. The TPS92638 features an ultra-wide operating voltage range of 5V–40V, making it perfectly suited to various power supply scenarios—such as automotive battery power and on-board voltage regulation systems. It effectively withstands voltage fluctuations during vehicle start-up, idling and whilst driving, ensuring the stable operation of the lighting system at all times.
In terms of dimming performance, the TPS92638 supports dual dimming modes—analogue dimming and PWM pulse dimming—which can be freely switched between to achieve stepless, precise adjustment of light brightness. Whether it is the gradual ‘breathing’ effect of interior ambient lighting, multi-level brightness switching, or the dynamic lighting effects of external daytime running lights and indicators, all can be accurately rendered, helping automotive manufacturers create personalised and intelligent in-vehicle lighting interaction experiences. Compared to traditional driver ICs, it offers higher dimming linearity and faster dynamic response, whilst eliminating issues such as flicker and light trailing.

Thanks to its multi-channel capability, high integration and automotive-grade reliability, the TPS92638 is widely applicable to various automotive lighting applications:
External lighting: Daytime Running Lights (DRL), position lights, fog lights, rear combination lamps, brake lights/tail lights
Interior lighting: Interior ceiling lights, reading lights, ambient lighting, instrument panel backlighting
System advantages: Suitable for modular automotive lighting designs requiring the driving of multiple LED strings within a medium power range

TPS92638 Procurement and Selection Guidelines
When procuring the TPS92638, it is recommended to confirm the full part number, such as TPS92638QPWPRQ1, and to verify the package type, operating temperature rating, pack quantity and data sheet version. If a higher output current is required, multiple channels can be connected in parallel; if more channels are needed, cascading or a multi-chip solution may be considered. Attention must be paid to heat dissipation during design, as the power dissipation of a linear driver is closely related to the input–output voltage difference and the load current.

Mingjiada Electronics guarantees stock availability, enabling customers to efficiently scale up to mass production
As a professional electronic component supply chain service provider, Mingjiada Electronics has specialised in the automotive electronics and industrial control sectors for many years, focusing on providing customers with genuine, authentic components and a stable, one-stop supply service. We have long supplied genuine TI TPS92638 automotive-grade LED drivers, with a stable supply chain and controlled quality, enabling us to respond swiftly to various customer order requirements, including sample testing, small-batch trial production and large-scale mass production.

For further information on the [TI] TPS92638 | Automotive 8-Channel Linear LED Driver or to enquire about sample pricing, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for more supply details.
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