Texas Instruments TPS92830QPWRQ1

Overview

TPS92830QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade 3-channel high-side linear LED controller that drives external N-channel MOSFETs with precision current regulation (±2.5% tolerance), independent PWM dimming per channel, and integrated two-stage charge pump (6.1–10 V output) for low-dropout operation-used in automotive front/rear lighting systems requiring robust diagnostics and thermal derating.

For engineers reviewing the TPS92830QPWRQ1 datasheet, TPS92830QPWRQ1 pinout, TPS92830QPWRQ1 application, or TPS92830QPWRQ1 equivalent, key selection considerations include its 4.5–40 V input range, 295 mV current-sense reference voltage, fault bus scalability to 15 devices, diagnostic enable threshold adjustability, and thermal shutdown at 176°C with 15°C hysteresis.

Technical Context

The TPS92830QPWRQ1 implements a high-precision constant-current regulation loop per channel using external sense resistors and gate-driven N-channel MOSFETs, with current set by V_{CS_REG} = 295 mV ±2.5%. It integrates a two-stage charge pump (2.65 MHz switching frequency) generating 6.1–10 V to ensure sufficient gate drive across wide input voltages.

Diagnostics include LED open-circuit detection (100–190 mV rising threshold), short-to-ground detection (0.885–0.95 V rising threshold), auto-retry timing (100–150 µs on-time, 10.8 ms off-time), and configurable fault bus behavior (one-fails-all-fail or channel-isolated fault reporting).

Key Specifications

Pinout & Package

TSSOP-28 (PW) package, 9.70 mm × 4.40 mm body size, thermally enhanced for automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side linear LED controller applications.

Compared with TPS92630QPWRQ1 and TPS92638QPWRQ1, the TPS92830QPWRQ1 provides superior analog dimming resolution (20:1 vs 10:1), dedicated DIAGEN threshold control for low-dropout stability, and lower fault-mode current - making it optimal for thermally demanding, high-fidelity front lighting systems.

Availability

TPS92830QPWRQ1 is available at Aetrix Electronics and suitable for automotive rear lighting, front lighting, multi-channel LED modules, and thermally constrained LED driver applications requiring stable component supply across extended production lifecycles.

Supply support for TPS92830QPWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive ICs, with deep expertise in power management and lighting control solutions.

The TPS92830QPWRQ1 belongs to TI's automotive LED driver product line, designed specifically for high-reliability, AEC-Q100–qualified front and rear lighting systems requiring precision current control, comprehensive diagnostics, and scalable fault handling.

FAQ

What is the maximum LED string voltage supported by the TPS92830QPWRQ1?

The TPS92830QPWRQ1 does not directly limit LED string voltage; instead, it operates as a high-side current controller using external N-channel MOSFETs. The maximum string voltage is determined by the breakdown voltage rating of the selected external MOSFET and the input supply rail (up to 40 V). The device's gate drive capability (6.1–10 V charge-pump output) ensures reliable MOSFET enhancement across the full 4.5–40 V input range, enabling use with high-forward-voltage LED strings when paired with appropriately rated MOSFETs. Always verify MOSFET V_DS rating exceeds worst-case system voltage.

How does the TPS92830QPWRQ1 implement thermal derating without an external temperature sensor?

The TPS92830QPWRQ1 uses the DERATE pin as a voltage-controlled current scaling input. By connecting a thermistor-based voltage divider to DERATE, designers translate external MOSFET temperature into a proportional analog voltage (0–2.5 V). The device internally maps this voltage to a current reduction ratio - e.g., 1.966 V yields 81–95% output current, while 2.316 V yields 51–65%. This analog method avoids ADC sampling delays and MCU dependency, enabling real-time, hardware-based thermal protection directly tied to MOSFET junction temperature.

Can the TPS92830QPWRQ1 synchronize PWM dimming across multiple devices?

Yes, the TPS92830QPWRQ1 supports inter-device PWM synchronization via its open-drain PWMOUT pin. When configured with an external 10-kΩ pull-up to IN, PWMOUT delivers a high-voltage PWM signal derived from the internal generator or external PWM inputs. Multiple TPS92830QPWRQ1 devices can share this signal to align dimming edges - eliminating visible beat frequencies in multi-lamp systems. The PWMOUT pin also allows external controllers to monitor or override dimming timing without modifying individual channel inputs.

What fault conditions trigger the FAULT pin, and how does the one-fails-all-fail mode work?

The FAULT pin asserts low for LED open-circuit, LED short-to-ground, thermal shutdown, or undervoltage lockout. In one-fails-all-fail mode (FAULT pin left floating), any device asserting FAULT pulls the shared bus low, causing all connected TPS92830QPWRQ1 devices to disable their outputs - ensuring complete lamp shutdown for safety-critical failures. This mode requires no external logic and is interoperable with TPS92630-Q1/TPS92638-Q1 devices, enabling mixed-family fault coordination in complex lighting architectures.

Does the TPS92830QPWRQ1 support both analog and PWM dimming simultaneously on the same channel?

Yes, the TPS92830QPWRQ1 supports concurrent analog and PWM dimming. The ICTRL pin sets the baseline current level (via 295 mV reference scaling), while PWM1/PWM2/PWM3 or the internal PWM generator modulates that current at high frequency. For example, setting ICTRL to 1.0 V establishes ~67% full-scale current, and applying a 50% duty-cycle PWM signal results in 33.5% average LED output. This dual-stage control enables fine brightness resolution (20:1 analog range) combined with flicker-free dynamic dimming - essential for DRL signature tuning and adaptive lighting.