Le blog de l'entreprise Supplying the TPS92630 Automotive-Grade Chip – A Three-Channel Linear LED Driver Designed Specifically for Automotive LED Lighting Applications

Mingjiada Electronics stocks Texas Instruments’ automotive-grade TPS92630 three-channel linear LED driver. Designed specifically for automotive exterior and interior lighting applications, this device has become the ideal choice for applications such as rear lights, daytime running lights, fog lights and interior lighting, thanks to its comprehensive diagnostic functions, built-in protection mechanisms and flexible dimming control. Below is a detailed introduction to the product, along with its features, specifications and application scenarios.

TPS92630 Product Overview

The TPS92630 is a three-channel linear LED driver from Texas Instruments featuring both analogue and PWM dimming control. The device is AEC-Q100 certified for automotive applications, with a Temperature Class 1 rating (operating temperature range of –40°C to 125°C), making it suitable for harsh automotive environments. A single device can drive up to three LED strings, each containing between 1 and 3 LEDs, with a maximum total current per channel of 150 mA. When channels are operated in parallel, a maximum drive current of 450 mA can be provided. It is housed in a 16-pin heat-sink-enhanced HTSSOP (PWP) package measuring 4.40 mm × 5.00 mm.

Key Features of the TPS92630

Input voltage range: 5 V to 40 V

Maximum output current per channel: 150 mA

Maximum output current in parallel mode: 450 mA

Channel accuracy (IOUT > 30 mA): ±1.5% per channel

Device accuracy (IOUT > 30 mA): ±2.5% per device

Voltage drop (at 60mA): 400mV per channel maximum

Voltage drop (at 150mA): 0.9V per channel maximum

Quiescent current: 0.5mA (typical)

Shut-down current: 10µA

Operating ambient temperature range: -40°C to 125°C

Operating junction temperature range: -40°C to 150°C

Package: 16-pin HTSSOP (PWP)

AEC-Q100: Grade Temperature Grade 1 / HBM ESD H2 / CDM C3B

Key Features of the TPS92630

Flexible dimming control

Analogue and PWM dimming: Supports both analogue dimming and pulse width modulation (PWM) dimming, enabling variable-intensity LED lighting control

Independent PWM Dimming per Channel: All three channels support independent PWM dimming, meeting the requirements for differentiated control of multi-zone lighting

Comprehensive Diagnostic and Protection Functions

Open-Circuit and Short-Circuit LED Detection: Built-in anti-glitch pulse timer reliably detects open-circuit and short-circuit faults in LEDs

Single-LED Short-Circuit Detection: Each channel provides LED string voltage feedback, supporting detection of short-circuit faults in individual LEDs

Dedicated Fault Pin: A dedicated fault pin is provided for single-LED short-circuit faults

Fault Reporting Bus: Open-circuit, short-circuit and thermal shutdown faults are reported via the fault pin; supports parallel connection of up to 15 devices on a single bus

Thermal Shutdown Protection: Automatically shuts down when the chip overheats to prevent device damage

High Precision and Flexibility

High-precision constant-current output: Accuracy of up to ±1.5% per channel ensures consistent LED brightness

Adjustable constant-current setting: Output current is set via an external reference resistor

Channel parallel operation: Multiple channels within a single IC can be used in parallel to provide higher current drive capability

Low dropout voltage: Maximum dropout voltage of just 400 mV at 60 mA, effectively reducing power consumption

Slow input voltage adaptation: Capable of adapting to slow input voltage change rates as low as 0.5 V/minute

Typical Applications

The TPS92630 is specifically designed for automotive LED lighting applications and is widely used in the following scenarios:

I. Automotive exterior lighting

Rear lights: As the core component of automotive rear light LED drivers, it provides stable and reliable constant-current drive

Parking Lights/Brake Lights (Stop/Taillight): Supports rapid response and precise control of high-brightness brake lights

Daytime Running Lights (DRL): Meets the requirements for high reliability and long service life in daytime running lights

Position Lights: Provides stable, low-power lighting drive

Fog Lights: Provides reliable lighting drive under adverse weather conditions

II. Automotive Interior Lighting

Interior Lighting: Includes reading lights, ambient lighting, footwell lighting, etc.

III. Other Applications

Auxiliary lighting functions for automotive headlamps

Variable-intensity LED lighting (medium power range)

Summary of Product Advantages

Automotive-grade certification: AEC-Q100 Temperature Grade 1, suitable for harsh environments ranging from -40°C to 125°C

Wide input voltage range: 5V to 40V, compatible with 12V and 24V automotive battery systems

High-precision constant current: ±1.5% accuracy per channel, ensuring consistent brightness across multiple LED channels

Comprehensive diagnostic protection: open-circuit/short-circuit detection, single-LED short-circuit detection and thermal shutdown, enhancing system reliability

Flexible dimming: Dual-mode (analogue and PWM) with independent dimming per channel

Multi-device parallel connection: Supports up to 15 devices connected in parallel via a fault bus

Mingjiada Electronics has all the above products in stock; enquiries and orders are welcome. For further product details, sample requests or bulk purchases, please contact Mingjiada Electronics.

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