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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Allegro MicroSystems A80606KEVJSR

Name: A80606KEVJSR
Brand: Allegro MicroSystems
SKU: A80606KEVJSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: A80606KEVJSR

Manufacturer:: Allegro MicroSystems

Category:: LED Drivers

Package:: 48-VFQFN Exposed Pad

Datasheet:: A80606KEVJSR.pdf

Description:: IC LED DRV RGLTR PWM 180MA 48QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

A80606KEVJSR 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. It delivers six precision current sinks (up to 180 mA each), supports 4.5–40 V input, achieves 15,000:1 PWM dimming contrast at 200 Hz, and operates in harsh automotive environments including cold crank (down to 4 V) and load dump.

For engineers reviewing the A80606KEVJSR datasheet, A80606KEVJSR pinout, A80606KEVJSR application, or A80606KEVJSR equivalent, key selection considerations include Pre-Emptive Boost control for ultra-high dimming ratio, fault handling mode (One-Out-Continue), wettable-flank QFN thermal performance, and compatibility with ASIL B system requirements.

Technical Context

The A80606KEVJSR integrates a programmable 260 kHz–2.3 MHz boost/SEPIC controller with cycle-by-cycle current limiting, external gate drive for N-MOSFET (2 A peak sink/source), and six matched LED current sinks with <3% accuracy and <2% channel-to-channel mismatch. Its Pre-Emptive Boost algorithm synchronizes boost switching with LED sink activation to minimize output ripple and enable 0.3 µs minimum PWM on-time.

It features dual dimming paths-PWM (200 Hz–2 kHz) and analog (DC or 40–1000 kHz APWM)-enabling 150,000:1 combined dimming ratio. Fault protection includes open/shorted-LED detection, overvoltage (OVP), overtemperature (170°C shutdown), input overcurrent with optional P-MOSFET disconnect, and cycle-by-cycle switch current limiting.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5–40 V startup; sustains operation down to 4 V - withstands automotive stop/start and cold crank transients.
LED Current Sinks	Six independent 180 mA sinks (±0.7% typical accuracy); paralleling enables up to 1.08 A total - supports high-brightness multi-string lighting.
PWM Dimming Ratio	15,000:1 at 200 Hz (Pre-Emptive Boost enabled); 150,000:1 with PWM + analog dimming - meets HUD and exterior lighting contrast requirements.
Switching Frequency	260 kHz–2.3 MHz, externally syncable or resistor-programmable; dithering reduces EMI - avoids AM band and eases EMC compliance.
Fault Handling Mode	One-Out-Continue - single LED string failure does not disable remaining strings, improving system reliability in safety-critical lighting.
Thermal Resistance	R_θJA = 24 °C/W (4-layer JEDEC PCB) - enables high-power operation with standard thermal pad layout (8+ vias required).
AEC-Q100 Grade	Grade 1 (–40°C to +125°C ambient) - qualified for under-hood and cabin automotive applications.

Pinout & Package

48-pin 7 mm × 7 mm wettable flank QFN with exposed thermal pad (EV package). Requires direct connection of exposed pad to PCB ground plane via ≥8 thermal vias for thermal integrity and solder joint inspection.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Main power input	Accepts 4.5–40 V; powers internal LDO and gate driver; UVLO threshold 4.45 V (rise), 4.05 V (fall).
VDD	Internal bias regulator output	~4.25 V regulated supply for analog circuitry; requires 1 µF decoupling to AGND.
AGND	Analog ground reference	"Quiet" ground for ISET, COMP, ADIM, PWM - must be separated from PGND for noise immunity.
ISET	LED current programming	Connect RISET to AGND to set full-scale current (e.g., 120 µA → 180 mA per channel).
PWM	Digital brightness control	Accepts 200 Hz–2 kHz PWM; supports 0.3 µs min on-time for ultra-fine dimming resolution.
EN	Enable control	Active-high logic; 16 ms delay before full shutdown when pulled low - enables graceful power-down.
GDRV	N-MOSFET gate driver output	Drives external boost switch gate; 2 A peak sink/source; 7 ns rise/fall time with 1.5 nF load.
LED1–LED6	Current sink outputs	Sink up to 180 mA each; unused pins require termination resistors (4.75 kΩ or 2.37 kΩ) for proper startup detection.
FAULT	Open-drain fault indicator	Pulled low on OVP, overtemp, shorted LED, or input overcurrent; requires external pull-up.
PEB	Pre-Emptive Boost timing adjust	Resistor to AGND sets delay between boost switch turn-on and LED sink activation (3.2–10.5 µs range).

Key Features

Feature	Design Value
Pre-Emptive Boost (PEB) control	Coordinates boost switching and LED sink activation to suppress output ripple and eliminate MLCC audible noise while enabling 15,000:1 PWM dimming.
One-Out-Continue fault response	Isolates failed LED string without disabling other channels - maintains partial illumination for functional safety in ASIL B lighting systems.
Programmable frequency dithering	Reduces EMI peaks by spreading switching spectrum; capacitor on DITH pin sets modulation frequency (1–22 kHz), resistor to FSET sets ±5% range.
Integrated input overcurrent protection	Monitors VIN–VSENSE voltage drop; triggers gate driver shutdown and FAULT assertion when threshold (88–108 mV) exceeded.
Multi-mode dimming interface	Supports standalone PWM, analog DC (0.2–2 V), or APWM clock (40–1000 kHz) - enables flexible MCU or ASIC control architecture.

Applications

Automotive Exterior Lighting	Automotive Heads-Up Display (HUD)
Use Scenario: Adaptive front lighting systems (AFS) and dynamic turn signals requiring precise, high-contrast LED intensity control across temperature and battery voltage variation. IC Role / Device Role / Timing Role: Primary LED current regulator with integrated boost/SEPIC controller and gate driver for high-side LED string configuration. Use Value: One-Out-Continue fault handling ensures partial headlamp functionality during single-string failure, supporting ISO 26262 ASIL B compliance.	Use Scenario: Compact HUD projection units needing ultra-high dimming ratio (>10,000:1) to maintain visibility in bright daylight and dark night conditions. IC Role / Device Role / Timing Role: Multi-channel constant-current driver with Pre-Emptive Boost to eliminate output ripple-induced image flicker and capacitor squeal. Use Value: 0.3 µs minimum PWM on-time and 150,000:1 combined dimming ratio enable seamless luminance gradation without visible steps.
Mid-Size Automotive LCD Backlight	Interior Ambient Lighting Control
Use Scenario: Instrument cluster and center display backlights requiring uniform brightness across 6–12 series-connected LEDs per string, with EMI-sensitive proximity to RF modules. IC Role / Device Role / Timing Role: High-efficiency boost controller with synchronized CLKOUT output to coordinate multiple converters and reduce system-level EMI. Use Value: 260 kHz–2.3 MHz programmable switching frequency allows placement above AM band; dithering further lowers peak emissions.	Use Scenario: Cabin mood lighting with smooth fade-in/fade-out transitions and color-mixing via independently dimmed RGBW strings. IC Role / Device Role / Timing Role: Six-channel current sink enabling per-color or per-zone control; ADIM and PWM inputs allow simultaneous analog fine-tuning and digital sequencing. Use Value: Dual dimming path (APWM + PWM) provides >16-bit effective resolution for imperceptible brightness transitions in human-centric lighting.

Automotive Exterior Lighting

Automotive Heads-Up Display (HUD)

Use Scenario: Adaptive front lighting systems (AFS) and dynamic turn signals requiring precise, high-contrast LED intensity control across temperature and battery voltage variation.

IC Role / Device Role / Timing Role: Primary LED current regulator with integrated boost/SEPIC controller and gate driver for high-side LED string configuration.

Use Value: One-Out-Continue fault handling ensures partial headlamp functionality during single-string failure, supporting ISO 26262 ASIL B compliance.

Use Scenario: Compact HUD projection units needing ultra-high dimming ratio (>10,000:1) to maintain visibility in bright daylight and dark night conditions.

IC Role / Device Role / Timing Role: Multi-channel constant-current driver with Pre-Emptive Boost to eliminate output ripple-induced image flicker and capacitor squeal.

Use Value: 0.3 µs minimum PWM on-time and 150,000:1 combined dimming ratio enable seamless luminance gradation without visible steps.

Mid-Size Automotive LCD Backlight

Interior Ambient Lighting Control

Use Scenario: Instrument cluster and center display backlights requiring uniform brightness across 6–12 series-connected LEDs per string, with EMI-sensitive proximity to RF modules.

IC Role / Device Role / Timing Role: High-efficiency boost controller with synchronized CLKOUT output to coordinate multiple converters and reduce system-level EMI.

Use Value: 260 kHz–2.3 MHz programmable switching frequency allows placement above AM band; dithering further lowers peak emissions.

Use Scenario: Cabin mood lighting with smooth fade-in/fade-out transitions and color-mixing via independently dimmed RGBW strings.

IC Role / Device Role / Timing Role: Six-channel current sink enabling per-color or per-zone control; ADIM and PWM inputs allow simultaneous analog fine-tuning and digital sequencing.

Use Value: Dual dimming path (APWM + PWM) provides >16-bit effective resolution for imperceptible brightness transitions in human-centric lighting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX20052ATP/V+T	4-channel, 150 mA/channel; integrated boost FET; no Pre-Emptive Boost; fixed 2.2 MHz fSW.	Lacks One-Out-Continue and ultra-high dimming ratio; limited to lower-power interior lighting.	Select only if board space constraints prohibit external MOSFET and dimming ratio >10,000:1 is unnecessary.
TPS92692QPWPRQ1	6-channel, 200 mA/channel; integrated boost FET; analog-only dimming; no PWM support below 100 Hz.	No PWM dimming path; cannot achieve >1,000:1 contrast without external PWM modulator.	Choose when analog control simplicity is prioritized over ultra-high contrast and transient robustness.

Compared with MAX20052ATP/V+T and TPS92692QPWPRQ1, the A80606KEVJSR uniquely combines external MOSFET scalability, One-Out-Continue fault resilience, and Pre-Emptive Boost for ripple-free ultra-high-dimming-ratio operation - making it the only option qualified for ASIL B-compliant exterior lighting and HUD.

Availability

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

Supply support for A80606KEVJSR 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 motion control.

The A80606KEVJSR belongs to Allegro's high-reliability automotive LED driver product line, designed specifically for ASIL B-compliant exterior and HUD lighting systems demanding ultra-high dimming ratio, fault resilience, and wide-input-voltage operation.

FAQ

What is the maximum total LED current supported by the A80606KEVJSR?

The A80606KEVJSR provides six independent current sinks rated up to 180 mA each. By paralleling multiple sinks (e.g., three sinks per string), the device can deliver up to 1.08 A total output current. This capability is confirmed in the datasheet's "Description" section and validated by the "Six integrated LED current sinks, up to 180 mA each" feature statement. The A80606KEVJSR's design allows flexible current scaling without external current-sharing components.

Does the A80606KEVJSR support synchronization with external clock sources?

Yes, the A80606KEVJSR supports external synchronization via its FSET/SYNC pin, accepting input frequencies from 260 kHz to 2.3 MHz. When synchronized, frequency dithering is disabled, and the internal oscillator locks to the external signal. This capability is explicitly documented in the "Selection Guide" and "Electrical Characteristics" tables, where fSWSYNC is specified as 260–2300 kHz. The A80606KEVJSR also provides a CLKOUT signal for cascading synchronization to other converters.

How does the One-Out-Continue fault handling mode work in the A80606KEVJSR?

The A80606KEVJSR implements One-Out-Continue fault handling: if one LED string fails open or shorted, the affected channel is disabled while the remaining five continue regulation. This behavior is defined in the "Selection Guide" table, which lists "One-Out-Continue" for A80606KEVJSR (vs. "One-Out-All-Out" for A80606KEVJSR-1). It ensures partial illumination remains functional - a critical requirement for ASIL B automotive lighting systems where redundancy and fail-operational behavior are mandated.

What thermal design guidelines apply to the A80606KEVJSR's wettable flank QFN package?

The A80606KEVJSR uses a 48-pin 7 mm × 7 mm wettable flank QFN (EV package) with an exposed thermal pad. Allegro specifies R_θJA = 24 °C/W on a 4-layer JEDEC-standard PCB. To meet this, the exposed pad must be connected to the PCB ground plane using at least eight thermal vias. This requirement is stated in the "Pinout Diagram and Terminal List" section and reinforced in the "Thermal Characteristics" table. Proper implementation ensures reliable operation at full load across –40°C to +125°C ambient.

Can the A80606KEVJSR operate during automotive cold crank conditions?

Yes, the A80606KEVJSR supports cold crank operation: it starts at VIN ≥ 4.5 V and continues functioning down to VIN = 4 V after startup. This is explicitly stated in the "Description" ("once started, it can continue to operate down to 4 V") and verified in the "Electrical Characteristics" table (VIN UVLO fall threshold = 4.05 V). The A80606KEVJSR's wide input range and robust undervoltage lockout make it suitable for 12 V automotive systems experiencing deep battery sag during engine cranking.

A80606KEVJSR Specifications

Product attributes: Attribute value

Manufacturer:: Allegro MicroSystems

Series:: -

Package/Case:: 48-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: SEPIC, Step-Up (Boost)

Internal Switch(s):: No

Number of Outputs:: 6

Voltage - Supply (Min):: 4.5V

Voltage - Supply (Max):: 40V

Voltage - Output:: 0.95V ~ 40V

Current - Output / Channel:: 180mA

Frequency:: 260kHz ~ 2.3MHz

Dimming:: Analog, PWM

Applications:: Backlight

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-QFN-EP (7x7)

A80606KEVJSR FAQ

1.How can I place an order for A80606KEVJSR through Aetrix?

Please submit a Request for Quotation (RFQ) for A80606KEVJSR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for A80606KEVJSR reliable?

The price and inventory of A80606KEVJSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A80606KEVJSR is usually 5 days.

3.What payment methods are accepted for A80606KEVJSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A80606KEVJSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for A80606KEVJSR?

A80606KEVJSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your A80606KEVJSR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for A80606KEVJSR?

For technical support, including A80606KEVJSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A80606KEVJSR requirements.

6.How does Aetrix verify that A80606KEVJSR is sourced from the original manufacturer or authorized distributors?

All A80606KEVJSR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that A80606KEVJSR meets industry standards.

7.What is the process for return or replacement of A80606KEVJSR?

All A80606KEVJSR units undergo pre-shipment inspection (PSI). If there is an issue with A80606KEVJSR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The A80606KEVJSR part is unused and in its original packaging.

Return procedure for A80606KEVJSR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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