Allegro MicroSystems A80606KEVJSR-1

Overview

A80606KEVJSR-1 from Allegro MicroSystems is an AEC-Q100 qualified automotive LED driver IC implementing a current-mode boost/SEPIC converter with external N-channel MOSFET gate driver and six integrated 180 mA current sinks. It delivers up to 1.08 A total LED current via sink paralleling, operates from 4.5–40 V input, and achieves 15,000:1 PWM dimming contrast at 200 Hz for exterior lighting and HUD applications.

For engineers reviewing the A80606KEVJSR-1 datasheet, A80606KEVJSR-1 pinout, A80606KEVJSR-1 application, or A80606KEVJSR-1 equivalent, this page provides verified technical context, fault-handling behavior (One-Out-All-Out), Pre-Emptive Boost timing, thermal derating guidance, and real-world dimming performance metrics - all confirmed for the exact A80606KEVJSR-1 variant.

Technical Context

The A80606KEVJSR-1 integrates a programmable 260 kHz–2.3 MHz boost/SEPIC controller with external N-MOSFET gate drive (2 A peak source/sink), six matched current sinks (±0.7% accuracy, 950–1050 mV compliance), and Pre-Emptive Boost control enabling 0.3 µs minimum PWM on-time. Its One-Out-All-Out fault handling disables all sinks upon any single LED string fault.

It features synchronized CLKOUT, dithering-enabled EMI reduction, analog dimming via ADIM (0.2–2 V DC or 40–1000 kHz APWM), and comprehensive protection including OVP, UVP, overtemperature (170°C shutdown), and cycle-by-cycle current limiting. Input UVLO operates from 4.45 V (rise) to 4.05 V (fall), sustaining operation down to 4 V post-startup.

Key Specifications

Pinout & Package

48-pin 7 mm × 7 mm wettable flank QFN with exposed thermal pad. Pin 1 marked; NC pins may be grounded for thermal improvement. Exposed pad must connect to PCB ground plane via ≥8 thermal vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-string LED driver applications.

Compared with AL8863T-7TR and LM3445MM/NOPB, the A80606KEVJSR-1 uniquely combines six precision current sinks, One-Out-All-Out fault response, Pre-Emptive Boost, and AEC-Q100 qualification - making it the only option for ASIL B-compliant, high-channel-count automotive LED systems requiring ultra-high dimming ratio and robust transient immunity.

Availability

A80606KEVJSR-1 is available at Aetrix Electronics and suitable for automotive exterior lighting, heads-up display, and mid-size LCD backlighting requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for A80606KEVJSR-1 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

Allegro MicroSystems is a U.S.-based semiconductor company specializing in high-performance power ICs and magnetic sensors for automotive and industrial applications.

The A80606 product line was designed specifically for AEC-Q100-compliant multi-string LED lighting in harsh automotive environments - emphasizing fault resilience, wide input range, ultra-high dimming fidelity, and thermal robustness.

FAQ

What distinguishes A80606KEVJSR-1 from A80606KEVJSR?

The A80606KEVJSR-1 implements One-Out-All-Out fault handling, meaning any single LED string fault causes immediate shutdown of all six current sinks. In contrast, A80606KEVJSR uses One-Out-Continue behavior, keeping remaining strings operational. This difference is hard-coded in silicon and cannot be altered via configuration pins or firmware. Both share identical pinout, package, and electrical specifications except for fault logic.

Does A80606KEVJSR-1 support synchronization with external clock sources?

Yes, A80606KEVJSR-1 supports external synchronization via the FSET/SYNC pin. When driven with a clean square wave between 260 kHz and 2.3 MHz, the internal oscillator locks to that frequency. During sync mode, frequency dithering is disabled, and CLKOUT mirrors the synchronized signal - enabling deterministic EMI reduction across multi-converter systems like automotive infotainment power trees.

How is LED current accuracy maintained across temperature in A80606KEVJSR-1?

A80606KEVJSR-1 achieves ±0.7% LED current accuracy over –40°C to 125°C by trimming both the ISET reference voltage (0.985 V ±30 mV) and the current gain (978 A/A ±22 A/A) during production test. The ISET pin voltage remains stable at 0.985 V regardless of load or temperature, and the current sink compliance voltage stays within 950–1050 mV - ensuring consistent brightness even under hood-temperature extremes.

Can A80606KEVJSR-1 drive more than six LED strings?

No, A80606KEVJSR-1 has exactly six dedicated current sink outputs (LED1–LED6). However, multiple sinks can be paralleled - e.g., LED1+LED2+LED3 - to deliver up to 1.08 A to a single high-power string. Paralleling requires matched layout, shared ISET, and identical thermal environment to maintain accuracy; it does not increase string count beyond six.

What thermal design practices are required for A80606KEVJSR-1 at maximum load?

At full 1.08 A output with 40 V input and 30 V LED string voltage, A80606KEVJSR-1 dissipates ~2.5 W. With R_θJA = 24 °C/W, junction temperature rises ~60°C above ambient. To sustain 125°C T_J at 105°C ambient, the PCB must provide ≤20°C/W effective thermal resistance - achieved by soldering the exposed pad to a solid ground plane with ≥8 thermal vias (0.3 mm diameter, 1 mm pitch) and minimizing copper isolation around the pad.