Diodes Incorporated AL8862QFGEAW-7

Overview

AL8862QFGEAW-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive LED step-down DC/DC converter with integrated 55V NDMOS switch, 5V–55V input range, up to 1A constant output current, and 1MHz switching frequency. It delivers precise LED current regulation via external R_SET, supports analog/PWM dimming on a single CTRL pin, and provides fault reporting (open LED, shorted sense resistor, overtemperature) in SO-8EP and V-DFN3030-8/SWP packages for automotive interior/exterior lighting.

For engineers reviewing the AL8862QFGEAW-7 datasheet, AL8862QFGEAW-7 pinout, AL8862QFGEAW-7 application, or AL8862QFGEAW-7 equivalent, key selection criteria include its 4% output current accuracy, high-side current sensing architecture, dual-package availability, automotive-grade thermal performance (T_J = –40°C to +150°C), and integrated fault diagnostics with open-drain FAULT output.

Technical Context

The AL8862QFGEAW-7 implements hysteresis-based current-mode control with internal 100mV ±4% SET threshold voltage referenced to VIN, enabling accurate average LED current regulation independent of input/output voltage variations. Its PWM/DC dimming logic operates directly on the CTRL pin without external circuitry, supporting 0.4V–2.5V analog control (10–100% I_{OUT_NOM}) and logic-level PWM (0.3V/2.6V thresholds, <1µs transitions).

Fault protection integrates three independent detection paths: open-circuit LED (via SW node monitoring), shorted R_SET (via abnormal SET pin voltage), and overtemperature (150°C trip with 30°C hysteresis). All faults assert low on the open-drain FAULT pin requiring external pull-up, and trigger immediate shutdown of the internal power switch.

Key Specifications

Pinout & Package

AL8862QFGEAW-7 is supplied in the V-DFN3030-8/SWP (Type A) package: 3.0mm × 3.0mm × 0.75mm body, exposed thermal pad (EP), RoHS-compliant green molding compound, and halogen/antimony-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL8862QFGEAW-7, AL8863QFGEAW-7 adds current headroom and EMI reduction but increases cost and thermal load, while LM3409QMYX/NOPB sacrifices integration and automotive compliance for discrete design control - making AL8862QFGEAW-7 optimal for cost-sensitive, AEC-Q100-compliant 1A LED lighting.

Availability

AL8862QFGEAW-7 is available at Aetrix Electronics and suitable for automotive interior lighting, exterior lighting, daytime running lights (DRL), and ECU lighting subsystems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for AL8862QFGEAW-7 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and product qualification aligned to AEC-Q100 standards.

The AL8862Q belongs to Diodes' automotive LED driver product line, engineered specifically for robust, high-efficiency constant-current regulation in harsh automotive environments - targeting headlamp, tail lamp, and cabin lighting applications demanding PPAP readiness and extended temperature operation.

FAQ

What is the recommended R_SET value for 700mA LED current?

For 700mA nominal output current, use R_SET = 0.143Ω (standard E24 value 0.15Ω yields 667mA). The relationship is I_{OUT_NOM} ≈ 0.1 / R_SET (Ω), derived from the 100mV internal SET threshold. A 0.15Ω resistor achieves 667mA with ±4% accuracy, suitable for most automotive LED strings requiring 650–700mA drive.

How does the FAULT pin behave during overtemperature condition?

During overtemperature (junction >150°C), the FAULT pin asserts low within 10µs and holds low until junction temperature falls below 120°C (150°C – 30°C hysteresis). The internal power switch remains off during this period, halting LED current flow until thermal recovery - ensuring safe thermal cycling without latch-up.

Can AL8862QFGEAW-7 drive LEDs in parallel configurations?

No - AL8862QFGEAW-7 is designed exclusively for series-connected LED strings. Parallel configuration causes current imbalance due to V_F mismatch, risking thermal runaway. The datasheet explicitly states "series connection of the LEDs provides identical LED currents" and relies on single-point current sensing at the string cathode.

What is the minimum recommended input capacitance and dielectric type?

Minimum input capacitance is 10µF X7R ceramic, placed within 2mm of VIN and GND pins. X7R is mandatory for stable capacitance across –40°C to +125°C and rated voltage; Y5V dielectrics are prohibited due to severe capacitance loss at temperature/voltage extremes and risk of instability.