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Allegro MicroSystems A80601KESJSR
- Part No.:
- A80601KESJSR
- Manufacturer:
- Allegro MicroSystems
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
A80601KESJSR.pdf
- Description:
- IC LED DRVR CTRL PWM 210MA 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,800
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Product details
Overview
A80601KESJSR 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 integrates four 210 mA LED current sinks, supports 4.5–40 V input, achieves 15,000:1 PWM dimming contrast at 200 Hz, and operates in exterior lighting and HUD systems.
For engineers reviewing the A80601KESJSR datasheet, A80601KESJSR pinout, A80601KESJSR application, or A80601KESJSR equivalent, key selection criteria include Pre-Emptive Boost control, 24-pin wettable-flank QFN package, fault-handling mode (One-Out-Continue), thermal resistance (37 °C/W), and compatibility with ASIL B system requirements.
Technical Context
The A80601KESJSR uses a patented Pre-Emptive Boost (PEB) algorithm to synchronize boost switching with LED sink activation, minimizing output ripple and enabling ultra-low PWM on-time (0.3 µs). Its dual-dimming architecture combines PWM and analog (ADIM) control for up to 150,000:1 contrast ratio.
It features programmable switching frequency (260 kHz–2.3 MHz) with dithering for EMI reduction, cycle-by-cycle current limiting for external MOSFET protection, and integrated fault detection including open/shorted LED, overvoltage, overtemperature, and input overcurrent with optional P-channel disconnect switch.
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, cold crank, and load dump transients. |
| LED Current Sinks | 4 × 210 mA (up to 840 mA total when paralleled) - enables flexible multi-string configurations for mid-size LCD backlights and exterior lamps. |
| PWM Dimming Ratio | 15,000:1 at 200 Hz (PWM only); 150,000:1 (PWM + analog) - meets high-contrast HUD and infotainment display requirements. |
| Switching Frequency | 260 kHz–2.3 MHz (externally syncable or resistor-programmed) - allows AM-band avoidance and EMI optimization via dithering. |
| Thermal Resistance | RθJA = 37 °C/W (4-layer JEDEC PCB) - defines power derating envelope for continuous 11 W LED load in automotive ambient (–40°C to 125°C). |
| Fault Handling | One-Out-Continue mode - maintains operation of remaining LED strings if one string fails open or shorted. |
| AEC-Q100 Grade | Qualified to Grade 1 (–40°C to +125°C TA) - certified for under-hood and cabin-mounted automotive lighting applications. |
Pinout & Package
Package: 24-pin 4 mm × 4 mm QFN with wettable flank and exposed thermal pad (ES package). Requires ≥8 vias connecting pad to ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED1–LED4 | LED current sink outputs | Cathode connections for up to four independent LED strings; each sinks up to 210 mA with ±0.7% accuracy and <2% matching. |
| GATE | N-channel MOSFET gate driver output | Drives external boost switch with 2 A peak source/sink, 7 ns rise/fall time, and 100 ns min on/off time. |
| GDRV | P-channel MOSFET gate driver output | Controls optional input disconnect switch; provides –6.7 V VGS during overcurrent fault with 3 µs shutdown delay. |
| VSENSE | Input current sense reference | Monitors VIN–VSENSE voltage drop across RSC; trip threshold adjustable via RADJ (98 mV typ) for input OCP. |
| FSET | Frequency/sync input | Resistor-programmable oscillator (200 kHz–2.3 MHz) or external clock sync input; disables dithering when synchronized. |
| PWM | Brightness control input | Accepts 200 Hz–2 kHz PWM signal; supports 0.3 µs minimum on-time and avoids MLCC audible noise via PEB timing. |
| EN | Enable control | Active-high logic input; initiates startup sequence and enters 16 ms standby before full shutdown when pulled low. |
| FAULT | Open-drain fault status | Pulled low on overtemperature, OVP, LED short/open, or FSET/ISET faults; requires external pull-up for system-level fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Pre-Emptive Boost (PEB) control | Coordinates boost switch turn-on with LED sink activation to reduce output ripple and enable 0.3 µs PWM on-time without capacitor noise. |
| Programmable frequency dithering | Reduces EMI peaks by modulating fSW (±5% range) using DITH capacitor/resistor network; configurable from 1–22 kHz. |
| Integrated LED string detection | Automatically identifies unused LED channels (via 2.37 kΩ AGND termination) and excludes them from regulation loop during soft-start. |
| ASIL B–compliant fault handling | One-Out-Continue behavior ensures functional safety compliance by maintaining illumination in remaining strings during single-point LED failure. |
| Ultra-low quiescent current | 1 µA sleep current (VIN = 16 V) enables always-on vehicle systems without battery drain concerns. |
Applications
| Automotive Exterior Lighting | Automotive Heads-Up Display (HUD) |
|---|---|
Use Scenario: Adaptive front lighting systems (AFS) and dynamic turn signals requiring precise, high-brightness LED control under wide input voltage transients. IC Role / Device Role / Timing Role: Primary LED current regulator with boost/SEPIC topology and external MOSFET gate driver; manages string current, dimming, and fault response in real time. Use Value: Withstands 4 V cold-crank and 40 V load dump events while delivering stable 210 mA per string and 15,000:1 dimming contrast for glare-free beam shaping. | Use Scenario: Compact projection-based HUD units where space-constrained PCBs demand high integration and minimal output ripple. IC Role / Device Role / Timing Role: Multi-string LED driver with Pre-Emptive Boost to eliminate ceramic capacitor audible noise and ensure flicker-free image projection. Use Value: Achieves 150,000:1 contrast via combined PWM/analog dimming and reduces EMI through programmable dithering - critical for EMI-sensitive cockpit electronics. |
| Infotainment LCD Backlighting | Automotive Interior Ambient Lighting |
Use Scenario: Mid-size center-stack displays (7–12 inch) requiring uniform brightness, local dimming zones, and ASIL-compliant fault management. IC Role / Device Role / Timing Role: Four-channel current sink controller with independent PWM/ADIM inputs and thermal shutdown; regulates backlight intensity across multiple LED strings. Use Value: Enables zone-specific dimming with <2% channel-to-channel current matching and auto-detection of unused strings to optimize efficiency and layout flexibility. | Use Scenario: Dynamic mood lighting systems with RGBW LEDs requiring smooth dimming transitions and robust fault isolation. IC Role / Device Role / Timing Role: High-accuracy LED driver supporting parallel sink configuration (up to 840 mA) and One-Out-Continue fault response for uninterrupted cabin illumination. Use Value: Delivers consistent color point stability across temperature (–40°C to +125°C) and supports seamless 0.3 µs PWM transitions for flicker-free ambient light modulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8863Q-7 | Single-output buck LED driver (max 1.5 A), no boost/SEPIC capability, lower input voltage range (4.5–36 V), no Pre-Emptive Boost. | Suitable for simpler interior lighting; lacks multi-string support and ultra-high dimming ratio. | Select when cost-sensitive single-string design suffices and ASIL B fault handling is not required. |
| LM3423QMH/NOPB | Boost LED controller (external MOSFET), 4–60 V input, but only one current sink; no integrated PEB or dithering; requires external PWM generator. | Applicable to basic headlamp designs; cannot match A80601KESJSR's 4-string coordination or 150,000:1 dimming. | Choose for legacy boost-only architectures where multi-sink integration is handled externally. |
Compared with AL8863Q-7 and LM3423QMH/NOPB, the A80601KESJSR uniquely delivers four matched current sinks, Pre-Emptive Boost for ripple/noise suppression, and One-Out-Continue fault resilience - making it the only option qualified for ASIL B-compliant multi-string HUD and exterior lighting.
Availability
A80601KESJSR is available at Aetrix Electronics and suitable for automotive exterior lighting, heads-up display systems, and infotainment backlighting requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for A80601KESJSR 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 markets.
The A80601 product line is designed specifically for high-reliability automotive LED lighting, emphasizing ultra-high dimming ratio, ASIL-compliant fault handling, and robust operation across harsh vehicle electrical environments.
FAQ
What is the maximum total LED current supported by the A80601KESJSR?
The A80601KESJSR supports up to 210 mA per channel across its four integrated current sinks. When all four sinks are paralleled, the device can deliver up to 840 mA total LED current. This configuration is validated in the datasheet for driving higher-power LED strings in automotive exterior lighting and HUD applications. The A80601KESJSR maintains ±0.7% current accuracy and <2% channel matching even at full 840 mA aggregate load.
Does the A80601KESJSR require an external MOSFET, and what type is recommended?
Yes, the A80601KESJSR requires an external N-channel MOSFET for the boost/SEPIC power stage, driven by its GATE pin. Allegro recommends fully enhanced devices with VGS(th) ≤ 2.5 V and RDS(on) optimized for 260 kHz–2.3 MHz switching. An optional P-channel MOSFET may also be used on the GDRV pin for input disconnect during overcurrent faults. The A80601KESJSR gate driver delivers 2 A peak source/sink current and supports fast 7 ns rise/fall times.
How does the Pre-Emptive Boost (PEB) feature improve performance in the A80601KESJSR?
The Pre-Emptive Boost (PEB) feature in the A80601KESJSR synchronizes the timing of the external boost switch turn-on with LED current sink activation. This eliminates output voltage overshoot and minimizes ripple on the LED string supply, preventing audible noise from MLCCs and enabling reliable 0.3 µs minimum PWM on-time. PEB is integral to achieving the A80601KESJSR's 15,000:1 dimming ratio at 200 Hz and is hardware-configured via the PEB pin resistor.
What fault protection mechanisms are implemented in the A80601KESJSR?
The A80601KESJSR implements comprehensive fault protection including overvoltage (OVP), overtemperature (TSD at 170°C), open/shorted LED detection, input overcurrent (via VSENSE), cycle-by-cycle boost switch current limiting, and FSET/ISET pin fault monitoring. Faults trigger the open-drain FAULT pin and enforce One-Out-Continue behavior - allowing continued operation of unaffected LED strings. All protections are fully integrated and require no external components beyond standard sense resistors and termination networks.
Can the A80601KESJSR operate below 4.5 V, and under what conditions?
Yes, the A80601KESJSR can operate down to 4.0 V after startup is complete, though a minimum 4.5 V is required to initiate startup (VIN UVLO rising threshold is 4.45 V). This extended low-voltage operation enables robust functionality during automotive cold-crank events where battery voltage dips transiently. The device maintains regulation, dimming control, and fault reporting throughout the 4.0–40 V operating range, as confirmed in the Electrical Characteristics table.
A80601KESJSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- SEPIC, Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 4.05V ~ 4.45V
- Current - Output / Channel:
- 210mA
- Frequency:
- 200kHz ~ 2.15MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 24-QFN (4x4)
A80601KESJSR FAQ
1.How can I place an order for A80601KESJSR through Aetrix?
Please submit a Request for Quotation (RFQ) for A80601KESJSR 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 A80601KESJSR reliable?
The price and inventory of A80601KESJSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A80601KESJSR is usually 5 days.
3.What payment methods are accepted for A80601KESJSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A80601KESJSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A80601KESJSR?
A80601KESJSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A80601KESJSR 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 A80601KESJSR?
For technical support, including A80601KESJSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A80601KESJSR requirements.
6.How does Aetrix verify that A80601KESJSR is sourced from the original manufacturer or authorized distributors?
All A80601KESJSR 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 A80601KESJSR meets industry standards.
7.What is the process for return or replacement of A80601KESJSR?
All A80601KESJSR units undergo pre-shipment inspection (PSI). If there is an issue with A80601KESJSR, 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 A80601KESJSR part is unused and in its original packaging.
Return procedure for A80601KESJSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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