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Allegro MicroSystems A80601KESJSR-1
- Part No.:
- A80601KESJSR-1
- Manufacturer:
- Allegro MicroSystems
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
A80601KESJSR-1.pdf
- Description:
- IC LED DRVR CTRL PWM 210MA 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,352
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Product details
Overview
A80601KESJSR-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. It delivers four integrated 210 mA current sinks, supports 4.5–40 V input, achieves 15,000:1 PWM dimming contrast at 200 Hz, and operates in ASIL B-compliant systems for exterior lighting and HUD applications.
For engineers reviewing the A80601KESJSR-1 datasheet, A80601KESJSR-1 pinout, A80601KESJSR-1 application, or A80601KESJSR-1 equivalent, key selection considerations include its One-Out-All-Out fault handling mode, Pre-Emptive Boost control enabling ultra-low PWM on-time (0.3 µs), wettable-flank 24-pin QFN package, and dual dimming (PWM + analog) support for 150,000:1 contrast ratio.
Technical Context
The A80601KESJSR-1 integrates a current-mode boost/SEPIC controller with programmable switching frequency (260 kHz–2.3 MHz), external synchronization capability, and spread-spectrum dithering to reduce EMI. Its Pre-Emptive Boost algorithm dynamically anticipates LED current sink activation to minimize output ripple and eliminate MLCC audible noise.
It features cycle-by-cycle current limiting on the external boost switch, comprehensive fault protection (open/shorted LED, OVP, overtemperature, input UVLO), and dual dimming control via dedicated PWM and ADIM pins - enabling precise brightness regulation across automotive ambient conditions including cold crank (down to 4 V post-start) and load dump.
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 | 4 × 210 mA precision sinks; paralleling enables up to 840 mA total - supports multi-string mid-size LCD backlighting and exterior lamps. |
| PWM Dimming Ratio | 15,000:1 at 200 Hz (PWM only); 150,000:1 with PWM + analog dimming - meets high-contrast HUD and infotainment display requirements. |
| Min. PWM On-Time | 0.3 µs - enables fine-grained low-duty-cycle dimming without dropout, critical for flicker-free operation. |
| Switching Frequency | 260 kHz–2.3 MHz, externally synchronizable or resistor-programmed - allows AM-band avoidance and system-level EMI coordination. |
| Fault Handling | One-Out-All-Out mode - shuts down all LED strings upon single-string fault, satisfying ASIL B system-level safety compliance. |
| Package | 24-pin 4 mm × 4 mm QFN with wettable flank and exposed thermal pad - ensures robust thermal dissipation (RθJA = 37 °C/W) in compact automotive PCB layouts. |
Pinout & Package
Package: 24-pin 4 mm × 4 mm QFN with wettable flank and exposed thermal pad (ES package). Thermal pad must be connected to PCB ground plane via ≥8 vias for optimal 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 | P-channel MOSFET gate driver output | Drives optional input disconnect switch during output-to-ground short faults - enhances system-level fault containment. |
| GDRV | N-channel MOSFET gate driver output | High-current (2 A peak) driver for external boost switch; supports fast 7 ns rise/fall times with 100 ns minimum on/off time. |
| CS | Boost switch current sense input | Connects to source of external N-MOSFET; enables cycle-by-cycle current limiting (210 mV threshold) and overcurrent shutdown (300 mV). |
| FSET | Frequency/synchronization input | Resistor-programmable oscillator (260 kHz–2.3 MHz) or external sync input - enables EMI reduction via dithering or multi-converter synchronization. |
| PWM | Digital dimming control input | Accepts 200 Hz–2 kHz PWM signal; supports 0.3 µs minimum on-time and single-wire dimming when tied to EN. |
| ADIM | Analog dimming input | Accepts DC voltage (0.2–2 V) or 40–1000 kHz APWM clock - enables smooth analog control or hybrid dimming for extended contrast range. |
| FAULT | Open-drain fault status output | Pulled low on any detected fault (OVP, LED short/open, overtemp, UVLO); requires external pull-up for system-level fault reporting. |
| VIN | Main power input | 4.5–40 V supply input; powers internal LDO (VDD) and senses input undervoltage (UVLO start: 4.45 V, stop: 4.05 V). |
| VDD | Internal LDO output | Regulated ~4.25 V bias supply; requires 1 µF decoupling to AGND - powers analog circuitry and error amplifier. |
| AGND | Analog ground reference | "Quiet" ground for ISET, COMP, ADIM, PWM - separate from PGND to prevent noise coupling into current regulation loop. |
| PGND | Power ground | Low-impedance return path for GDRV, CS, and LED sinks - must connect directly to PCB power ground plane with shortest trace. |
| ISET | LED current programming input | Connect RISET resistor to AGND to set full-scale current (e.g., 8.33 kΩ → 120 µA → 175 mA per string). |
| COMP | Error amplifier compensation node | Connect RC network to AGND to stabilize boost regulation loop - critical for transient response under varying LED load and input voltage. |
| OVP | Output overvoltage sense input | Resistor-divider from VOUT sets OVP threshold (2.5 V typical); also enables undervoltage detection (VUVP = VOVP / 12). |
| VSENSE | Input current sense input | Monitors VIN–VSENSE voltage drop across external RSC; triggers input overcurrent protection at 98 mV nominal trip point. |
| EN | Enable input | Logic-high enables IC; logic-low initiates 16 ms standby delay before full shutdown - supports controlled power sequencing. |
| CLKOUT | Synchronized clock output | Replicates internal fSW (with dithering) - allows timing alignment of auxiliary converters to reduce beat frequencies and system-level EMI. |
| PEB | Pre-Emptive Boost control | Resistor-to-AGND adjusts delay between boost switch turn-on and LED sink activation - minimizes output ripple and eliminates ceramic capacitor noise. |
| DITH | Dithering modulation control | Capacitor-to-AGND sets dither frequency (1–22 kHz); resistor-to-FSET sets dither range (±5% typical) - reduces peak EMI by spreading spectrum. |
| VDRV | Gate driver supply | ~6.5 V LDO output for GDRV; requires 2.2 µF MLCC to PGND - ensures stable gate drive under high-frequency switching. |
| CS | Current sense input | Connects to source of external N-MOSFET; enables cycle-by-cycle current limiting (210 mV threshold) and overcurrent shutdown (300 mV). |
| Pad | Exposed thermal pad | Must be soldered to PCB ground plane with ≥8 thermal vias - primary path for heat dissipation (RθJA = 37 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Pre-Emptive Boost (PEB) control | Reduces output ripple by anticipating LED sink activation - eliminates MLCC audible noise and improves stability under dynamic dimming. |
| One-Out-All-Out fault handling | Shuts down all LED strings upon detection of any single-string fault - satisfies ASIL B functional safety requirements for automotive lighting. |
| Programmable spread-spectrum dithering | Configurable dither frequency (1–22 kHz) and range (±5%) - lowers peak EMI without compromising regulation accuracy or efficiency. |
| Ultra-low PWM on-time (0.3 µs) | Enables deep dimming at low duty cycles without current dropout - essential for flicker-free operation in HUD and instrument cluster displays. |
| Input disconnect gate driver (GATE pin) | Drives external P-MOSFET to isolate input during output-to-ground short - prevents uncontrolled current flow and enhances system-level fault isolation. |
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 temperature and voltage ranges. IC Role / Device Role / Timing Role: Primary LED current regulator with boost/SEPIC topology, providing stable 210 mA per string while surviving 40 V load dump events. Use Value: A80601KESJSR-1's One-Out-All-Out fault mode ensures fail-safe shutdown during LED string failure - meeting ISO 26262 ASIL B requirements for exterior lighting. | Use Scenario: High-contrast projection-based HUDs where LED brightness must be precisely modulated across ambient light conditions from dark tunnels to bright daylight. IC Role / Device Role / Timing Role: Multi-string LED driver with Pre-Emptive Boost and dual dimming (PWM + analog) - delivering 150,000:1 contrast ratio at 200 Hz. Use Value: A80601KESJSR-1's 0.3 µs minimum PWM on-time and ripple-suppressed output enable flicker-free, high-resolution HUD imagery without audible capacitor noise. |
| Infotainment LCD Backlighting | Automotive Interior Ambient Lighting |
Use Scenario: Mid-size center-stack displays requiring uniform, dimmable backlighting with minimal EMI impact on nearby RF receivers (e.g., Bluetooth, cellular). IC Role / Device Role / Timing Role: Four-channel current sink driving parallel LED strings; programmable 260 kHz–2.3 MHz switching synchronized to system clock via CLKOUT. Use Value: A80601KESJSR-1's spread-spectrum dithering and external sync capability suppress narrowband EMI peaks - simplifying EMC certification for infotainment modules. | Use Scenario: Dynamic interior mood lighting with smooth dimming transitions and color-mixing using multiple independently controlled LED channels. IC Role / Device Role / Timing Role: Precision current regulator supporting both PWM and analog dimming inputs - enabling seamless brightness ramping without step artifacts. Use Value: A80601KESJSR-1's ADIM pin accepts DC voltage (0.2–2 V) or APWM clock (40–1000 kHz), allowing microcontroller-driven linear dimming curves with <1% current error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A80601KESJSR | One-Out-Continue fault handling - keeps remaining strings operational during single-string fault. | Preferred for non-safety-critical interior lighting where partial functionality retention is acceptable. | Select A80601KESJSR-1 when ASIL B compliance and full-string shutdown are required; choose A80601KESJSR for cost-sensitive, non-safety applications needing graceful degradation. |
| LM3409QMYX/NOPB | Single-channel buck-boost LED driver; no integrated current sinks, no Pre-Emptive Boost, max 1.5 MHz fSW, no AEC-Q100 qualification. | Targeted at simpler, lower-channel-count industrial LED systems - lacks automotive qualification and multi-string integration. | A80601KESJSR-1 provides higher integration (4× sinks), automotive qualification, and superior dimming performance; LM3409QMYX/NOPB may suit discrete, non-automotive designs with simpler topology needs. |
Compared with A80601KESJSR, the A80601KESJSR-1 prioritizes functional safety via One-Out-All-Out behavior, while LM3409QMYX/NOPB offers lower channel count and no automotive qualification - making A80601KESJSR-1 uniquely suited for ASIL B-compliant multi-string automotive lighting where fault containment is mandatory.
Availability
A80601KESJSR-1 is available at Aetrix Electronics and suitable for automotive exterior lighting, heads-up display systems, and infotainment LCD backlighting requiring stable component supply, AEC-Q100 qualification, and ASIL B-compliant fault handling.
Supply support for A80601KESJSR-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 markets.
The A80601 product line delivers high-power, multi-string LED drivers with Pre-Emptive Boost control - engineered specifically for demanding automotive lighting applications requiring ultra-high dimming ratios, low EMI, and functional safety compliance.
FAQ
What is the key functional safety distinction of A80601KESJSR-1 versus A80601KESJSR?
A80601KESJSR-1 implements One-Out-All-Out fault handling, meaning it shuts down all four LED strings upon detection of any single-string fault (e.g., open or shorted LED). This behavior satisfies ASIL B system-level safety requirements for automotive exterior lighting. In contrast, A80601KESJSR uses One-Out-Continue mode, maintaining operation of unaffected strings - suitable for non-safety-critical interior applications. The fault table in the A80601 datasheet explicitly defines this difference for A80601KESJSR-1.
How does Pre-Emptive Boost (PEB) in A80601KESJSR-1 improve LED system performance?
Pre-Emptive Boost (PEB) in A80601KESJSR-1 dynamically anticipates LED current sink activation and advances the boost switch turn-on timing. This minimizes output voltage ripple during PWM dimming transitions, eliminating audible noise from MLCCs and improving regulation stability. The PEB delay is adjustable via the PEB pin resistor, and A80601KESJSR-1 achieves 0.3 µs minimum PWM on-time - enabling flicker-free dimming at ultra-low duty cycles not possible with conventional boost LED drivers.
What input voltage conditions can A80601KESJSR-1 withstand in automotive environments?
A80601KESJSR-1 operates from 4.5 V to 40 V at startup and sustains operation down to 4 V after startup - enabling reliable function during automotive cold crank (low battery), stop/start cycling, and 40 V load dump events. Its input UVLO has a 400 mV hysteresis (4.45 V rise, 4.05 V fall), and the VSENSE pin monitors input current to trigger disconnect via the GATE pin during overcurrent faults - ensuring robustness across the full automotive voltage profile.
Can A80601KESJSR-1 drive more than four LED strings, and how is current scaling achieved?
Yes - A80601KESJSR-1 supports paralleling of its four integrated current sinks to achieve higher total LED current. Each sink delivers up to 210 mA with ±0.7% accuracy and <2% matching; paralleling all four enables up to 840 mA total output. Current scaling is accomplished by connecting multiple LED strings to the same LEDx pins (e.g., two strings to LED1 and LED2), with ISET resistor value adjusted accordingly. The A80601KESJSR-1 datasheet confirms this configuration in the "Multiple sinks can be paralleled together" statement on page 1.
What thermal management requirements apply to the A80601KESJSR-1 package?
A80601KESJSR-1 uses a 24-pin 4 mm × 4 mm QFN with wettable flank and exposed thermal pad (ES package). To maintain junction temperature ≤150 °C, the exposed pad must be soldered to the PCB ground plane using at least eight thermal vias. Its thermal resistance is RθJA = 37 °C/W on a JEDEC-standard 4-layer board. The device includes thermal shutdown at 170 °C (typical) with 20 °C hysteresis - a feature confirmed in the Electrical Characteristics table on page 8 of the A80601 datasheet.
A80601KESJSR-1 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-1 FAQ
1.How can I place an order for A80601KESJSR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for A80601KESJSR-1 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-1 reliable?
The price and inventory of A80601KESJSR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A80601KESJSR-1 is usually 5 days.
3.What payment methods are accepted for A80601KESJSR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A80601KESJSR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A80601KESJSR-1?
A80601KESJSR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A80601KESJSR-1 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-1?
For technical support, including A80601KESJSR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A80601KESJSR-1 requirements.
6.How does Aetrix verify that A80601KESJSR-1 is sourced from the original manufacturer or authorized distributors?
All A80601KESJSR-1 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-1 meets industry standards.
7.What is the process for return or replacement of A80601KESJSR-1?
All A80601KESJSR-1 units undergo pre-shipment inspection (PSI). If there is an issue with A80601KESJSR-1, 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-1 part is unused and in its original packaging.
Return procedure for A80601KESJSR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A80601KESJSR-1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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