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Allegro MicroSystems A6213KLJTR-T
- Part No.:
- A6213KLJTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
A6213KLJTR-T.pdf
- Description:
- IC LED DRIVER RGLTR PWM 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:42,369
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Product details
Overview
A6213KLJTR-T from Allegro MicroSystems is an automotive-grade, constant-current PWM-dimmable buck LED driver IC with integrated high-side N-channel DMOS switch. It delivers up to 3 A true average output current across –40°C to 125°C ambient, supports 6–48 V input, and automatically adjusts output voltage to drive single-string high-power LEDs-used in daytime running lights, fog lamps, and stop/turn lighting.
For engineers reviewing the A6213KLJTR-T datasheet, A6213KLJTR-T pinout, A6213KLJTR-T application, or A6213KLJTR-T equivalent, key selection criteria include its AEC-Q100 qualification, cycle-by-cycle current limiting, 1.5 A minimum guaranteed output (A6213-1 variant), thermal shutdown at 165°C, and compatibility with external PWM dimming at 100 Hz–2 kHz.
Technical Context
The A6213KLJTR-T implements fixed on-time, average current mode control using a cycle-by-cycle regulated on-time method and internal error amplifier with 0.2 V current sense threshold. Its integrated high-side switch features 0.25 Ω typical RDS(on) at 25°C and supports bootstrap gate drive via dedicated BOOT pin.
It incorporates undervoltage lockout (5.3 V threshold, 150 mV hysteresis), thermal shutdown (165°C, 25°C hysteresis), and robust fault protection against pin-to-GND shorts, adjacent pin shorts, and open/short component faults-enabling reliable operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 48 V - supports full automotive battery range including cold-crank and load-dump transients. |
| Max Output Current | 3 A - guaranteed over full –40°C to 125°C ambient temperature range for A6213KLJTR-T. |
| Current Sense Threshold | 200 mV typical - sets LED current via external RSENSE; iLED = 0.2 V / RSENSE. |
| Switch On-Resistance | 0.25 Ω typical at 25°C - determines conduction loss and thermal budget at high current. |
| UVLO Threshold | 5.3 V with 150 mV hysteresis - prevents erratic startup during low-battery conditions. |
| Thermal Shutdown | 165°C with 25°C hysteresis - protects die integrity and enables automatic recovery after cooldown. |
| PWM Dimming Range | 100 Hz to 2 kHz - direct logic-level EN pin control enables precise brightness adjustment without external circuitry. |
Pinout & Package
Package: 8-pin narrow SOIC (SOICN) with exposed thermal pad (suffix LJ); RoHS-compliant, lead-free, 100% matte-tin leadframe plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Supply voltage input | Accepts 6–48 V DC; powers internal circuitry and high-side switch. |
| TON | On-time setting resistor terminal | Connects external resistor to set switching frequency (e.g., 137 kΩ → 1 MHz). |
| EN | Enable/PWM dimming input | Logic-high enables operation; PWM signal directly controls LED brightness (100 Hz–2 kHz). |
| CS | Current sense feedback | Monitors voltage across RSENSE; regulates average LED current at 200 mV reference. |
| VCC | Internal linear regulator output | 5.4 V typical regulated supply for internal logic; not intended for external loading. |
| GND | Ground reference | Primary return path for power and signal; connects to exposed thermal pad. |
| BOOT | Bootstrap gate driver | Provides floating bias for high-side MOSFET gate; requires 0.1 µF ceramic capacitor to SW. |
| SW | Switched output node | Drives inductor; transitions between GND and VIN; requires low-inductance layout to minimize EMI. |
| PAD | Exposed thermal pad | Must be soldered to PCB ground plane for optimal thermal dissipation (RθJP = 2°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from –40°C to +125°C ambient. |
| True average current regulation | Maintains consistent LED brightness independent of input/output voltage variation or temperature drift. |
| Cycle-by-cycle current limiting | Trips at 4.0 A typical to prevent inductor saturation and LED overcurrent during fault conditions. |
| Integrated high-side DMOS switch | Eliminates need for external high-side FET and associated gate-drive complexity. |
| Low-power shutdown mode | Draws only 1 µA typical when EN is low, enabling energy-efficient standby in always-on systems. |
| Robust fault protection suite | Detects and shuts down for pin-to-GND shorts, adjacent pin shorts, open/short components, and missing Schottky diode. |
Applications
| Daytime Running Lights (DRL) | Front/Rear Fog Lights |
|---|---|
|
Use Scenario: Continuous, high-reliability illumination under variable battery voltage and ambient temperature. IC Role / Device Role / Timing Role: Constant-current buck regulator maintaining stable 1.5–3 A LED string current despite 6–48 V input swings. Use Value: Ensures consistent luminous output and compliance with ECE R87; eliminates need for external current-sense amplifiers or microcontroller-based regulation. |
Use Scenario: High-intensity, thermally demanding lighting in wet/dirty conditions with frequent on/off cycling. IC Role / Device Role / Timing Role: Automotive-grade LED driver with thermal shutdown (165°C) and fault recovery for sustained high-current operation. Use Value: Prevents thermal runaway during prolonged fog light use; maintains safety-critical visibility without system-level intervention. |
| Stop/Turn Signal Lamps | Dimmable Interior Lighting |
|
Use Scenario: Fast-response, high-brightness signaling requiring rapid current ramp-up and precise duty-cycle control. IC Role / Device Role / Timing Role: PWM-dimmable buck controller with <130 µs startup delay and no latency during EN-driven dimming transitions. Use Value: Enables instant brake light activation and smooth turn-signal fade effects without microcontroller overhead or external timing components. |
Use Scenario: User-adjustable cabin lighting with smooth brightness control and low-noise operation. IC Role / Device Role / Timing Role: Direct logic-level EN pin dimming interface supporting 1–100% duty cycle at 200 Hz for flicker-free perception. Use Value: Delivers silent, ripple-free dimming without audible coil whine or visible LED flicker-critical for premium vehicle interiors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current buck LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMY/NOPB | Adjustable current sense threshold (0.21 V), no integrated switch - requires external high-side MOSFET. | Lacks AEC-Q100 qualification; rated for industrial temp only (–40°C to 125°C junction, not ambient). | Choose when board space allows discrete FET placement and AEC-Q100 is not required. |
| TPS92630QPWPRQ1 | Integrated 3.5 A switch, 0.1 V current sense, supports analog + PWM dimming; higher integration but lower max input (40 V). | Includes built-in diagnostics (open/short LED detection) and I²C interface - adds system-level monitoring capability. | Prefer when diagnostic reporting, dual dimming modes, or tighter current tolerance (<±3%) are required. |
Compared with LM3409QMY/NOPB and TPS92630QPWPRQ1, the A6213KLJTR-T offers AEC-Q100 qualification, higher input voltage headroom (48 V), and simpler BOM with integrated switch-making it optimal for cost-sensitive, high-reliability automotive lighting where diagnostics are secondary to robustness and thermal resilience.
Availability
A6213KLJTR-T is available at Aetrix Electronics and suitable for automotive lighting, industrial LED signage, and transportation lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for A6213KLJTR-T 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 A6213 product line delivers automotive-grade constant-current LED drivers optimized for reliability, thermal resilience, and simplified system design in exterior lighting applications.
FAQ
What is the maximum continuous output current supported by the A6213KLJTR-T?
The A6213KLJTR-T guarantees up to 3 A true average output current over its full operating ambient temperature range of –40°C to 125°C. This rating assumes proper PCB thermal design-including connection of the exposed pad to a sufficient copper area-and accounts for conduction losses in the integrated 0.25 Ω high-side switch. At elevated temperatures or high duty cycles, derating may be necessary to maintain junction temperature below 150°C.
How does the A6213KLJTR-T implement PWM dimming?
The A6213KLJTR-T uses its EN pin for direct logic-level PWM dimming: a high signal enables the buck converter, while a pulsed signal (100 Hz–2 kHz) modulates LED brightness proportionally to duty cycle. No external components are needed-dimming occurs without startup delay during PWM transitions, and the IC remains in active regulation throughout. Minimum PWM on-time should be ≥50 µs for stable operation.
Is the A6213KLJTR-T qualified for automotive applications?
Yes, the A6213KLJTR-T is AEC-Q100 Grade 1 qualified, meaning it has been tested and certified for operation in automotive environments with ambient temperatures from –40°C to +125°C. It includes automotive-specific protections such as UVLO with hysteresis, thermal shutdown with recovery hysteresis, and fault detection for pin shorts, open circuits, and missing external components like the Schottky diode.
What package type and thermal characteristics does the A6213KLJTR-T use?
The A6213KLJTR-T is housed in an 8-pin narrow SOIC (SOICN) package with an exposed thermal pad (suffix LJ). Its thermal resistance from junction to pad is 2°C/W, and junction-to-ambient is 35°C/W on a 4-layer JEDEC-standard PCB. For optimal performance, the exposed pad must be soldered to a dedicated GND copper pour with multiple thermal vias to internal ground planes.
Can the A6213KLJTR-T drive multiple LED strings?
No-the A6213KLJTR-T is designed exclusively for driving a single series-connected LED string. Its current sense architecture regulates average current through one external RSENSE placed in the LED return path. Driving parallel strings would cause current imbalance due to forward-voltage mismatches and is not supported by the device's control loop or protection features.
A6213KLJTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 48V
- Voltage - Output:
- -
- Current - Output / Channel:
- 3A
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
A6213KLJTR-T FAQ
1.How can I place an order for A6213KLJTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A6213KLJTR-T 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 A6213KLJTR-T reliable?
The price and inventory of A6213KLJTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A6213KLJTR-T is usually 5 days.
3.What payment methods are accepted for A6213KLJTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A6213KLJTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A6213KLJTR-T?
A6213KLJTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A6213KLJTR-T 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 A6213KLJTR-T?
For technical support, including A6213KLJTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A6213KLJTR-T requirements.
6.How does Aetrix verify that A6213KLJTR-T is sourced from the original manufacturer or authorized distributors?
All A6213KLJTR-T 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 A6213KLJTR-T meets industry standards.
7.What is the process for return or replacement of A6213KLJTR-T?
All A6213KLJTR-T units undergo pre-shipment inspection (PSI). If there is an issue with A6213KLJTR-T, 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 A6213KLJTR-T part is unused and in its original packaging.
Return procedure for A6213KLJTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A6213KLJTR-T Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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