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

Infineon Technologies TLD21321EPXUMA1

Name: TLD21321EPXUMA1
Brand: Infineon Technologies
SKU: TLD21321EPXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLD21321EPXUMA1

Manufacturer:: Infineon Technologies

Category:: LED Drivers

Package:: 14-TSSOP (0.154", 3.90mm Width) Exposed Pad

Datasheet:: TLD21321EPXUMA1.pdf

Description:: IC LED DRV LIN PWM 180MA 14TSDSO

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Product details

Overview

TLD21321EPXUMA1 from Infineon Technologies is a single-channel automotive-grade high-side LED driver IC with integrated protected current source output stage, designed for precise 180 mA nominal (240 mA max) LED current control in 5.5–40 V supply systems; features reverse polarity protection, intelligent fault management via shared ERRN network, and supports RGB ambient lighting, DRL, and animated turn indicators.

For engineers reviewing the TLD21321EPXUMA1 datasheet, TLD21321EPXUMA1 pinout, TLD21321EPXUMA1 application, or TLD21321EPXUMA1 equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and fault behavior, and real-world automotive lighting use cases - all grounded in Infineon's AEC-Q100-qualified LITIX™ Basic+ specification.

Technical Context

The TLD21321EPXUMA1 implements a high-side current-regulated output stage with external R_SET-based current programming (900 ±5% accuracy at 10 kΩ), enabling stable LED drive independent of load and supply voltage variations across 5.5–40 V. It integrates thermal shutdown, reverse battery protection, open-load/short-to-GND diagnosis, and single-LED short (SLS) detection using SLS_REF and DS pins.

Fault reporting occurs via open-drain ERRN (active-low) and configurable D-pin behavior (capacitor-timed retry or latched disable); up to 16 devices share one external pull-up on ERRN. EN/DEN enables both output control and diagnosis activation, while PWMI accepts external PWM for dimming without internal oscillator dependency.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current (nominal)	180 mA at 8–18 V supply - drives 3 red LEDs reliably in automotive stop/tail applications
Max output current	240 mA - achievable with low thermal resistance layout (R_thJA dependent)
Current accuracy	±5% at R_SET = 10 kΩ - ensures consistent brightness across production units
Sleep mode current	0.1 µA - enables ultra-low power state for body control modules during vehicle sleep
Fault current (ERRN-driven)	≤850 µA - minimizes error network loading when multiple drivers share one pull-up resistor
Operating voltage range	5.5 V to 40 V - covers cold-crank (5.5 V), normal operation (12/24 V), and load-dump (40 V)
Junction temperature range	−40°C to +150°C - qualified per AEC-Q100 Grade 0 for under-hood and exterior lighting

Pinout & Package

Package: PG-TSDSO-14 (exposed pad), thermally enhanced SOIC variant with GND-connected EP for improved heat dissipation in high-current LED drive applications.

Pin/Terminal	Circuit Role	Design Meaning
1 (SLS_REF)	Single LED short reference input	Adjusts internal SLS threshold voltage via external resistor; connect to GND if unused
2 (OUT_SET)	Current reference output	Drives IN_SET of secondary TLD2132-1EP for synchronized multi-channel current sourcing
4 (IN_SET)	Current setpoint input	Accepts external R_SET or another OUT_SET to define 180/240 mA output current
6 (PWMI)	PWM dimming input	Directly modulates output current with external PWM signal; tie to GND if not used
7 (D)	Disable/delay error input	Configures fault recovery strategy: capacitor = timed retry, GND = latch-off, open = default
12 (OUT)	High-side output channel	Drives LED anode; capable of 240 mA sink into GND via external cathode path
14 (ERRN)	Error flag I/O	Open-drain active-low output; shared across up to 16 devices with single pull-up
EP (Exposed Pad)	Thermal & electrical ground	Must be soldered to PCB GND plane for thermal performance and EMI reduction

Key Features

Feature	Design Value
Reverse polarity protection	Enables direct battery connection without external diode - reduces BOM count and improves low-voltage startup
Shared ERRN fault network	Supports daisy-chained diagnostics for up to 16 drivers using one external resistor - simplifies wiring in multi-light clusters
Low leakage in OFF state	<1 µA output leakage - prevents unintended LED glow during sleep or fault conditions
Intelligent SLS detection	Distinguishes single-LED short from full-string short using DS timing and SLS_REF reference - avoids false fault triggers
Thermal overload protection	Auto-shutdown at T_J >150°C with hysteresis - protects IC and adjacent components during sustained overcurrent

Applications

Automotive Stop/Tail Lighting

Daytime Running Light (DRL)

Use Scenario: Dual-function rear lamp module where same PCB drives separate red LEDs for stop and tail illumination using shared driver resources.

IC Role / Device Role / Timing Role: High-side current source controlling two independent LED strings via time-multiplexed IN_SET configuration and fault-isolated ERRN signaling.

Use Value: Eliminates need for dual discrete drivers; reduces PCB area by 35% and enables AEC-Q100-compliant thermal management at 180 mA per function.

Use Scenario: Front-end DRL system requiring constant-brightness white LEDs across varying battery voltages (11–14.5 V) and ambient temperatures (−40°C to +85°C).

IC Role / Device Role / Timing Role: Precision current regulator maintaining ±5% output stability despite supply and thermal drift, with PWMI dimming for dynamic intensity control.

Use Value: Meets ECE R87 photometric requirements without closed-loop optical feedback; achieves <1% luminance variation over full operating range.

Animated Turn Indicators

RGB Ambient Interior Lighting

Use Scenario: Sequential "wiping" turn signal using 5–8 LEDs per side, activated by MCU-controlled PWM bursts on PWMI with synchronized fault monitoring.

IC Role / Device Role / Timing Role: Fast-response current source enabling sub-10 ms ON/OFF transitions and real-time open-load detection per segment.

Use Value: Supports ECE R65 sequential animation compliance; eliminates flicker artifacts during rapid PWM dimming due to low propagation delay (<2 µs).

Use Scenario: Dashboard and footwell ambient lighting with independent red/green/blue channels driven by three TLD21321EPXUMA1 devices sharing one MCU-controlled ERRN bus.

IC Role / Device Role / Timing Role: Independent high-accuracy current source per color channel, with coordinated fault reporting and thermal derating across all three ICs.

Use Value: Enables smooth 16-bit color mixing without current mismatch; maintains Δu'v' <0.003 across temperature via matched R_SET networks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8862SP-13	Step-down DC-DC LED driver with 2 A max output; requires external inductor and diode; no integrated reverse polarity protection	Used in high-power DRLs where efficiency >90% is critical; lacks shared ERRN and SLS diagnostics	Select when driving >500 mA strings with wide-input buck topology; avoid for cost-sensitive tail-light modules needing integrated protection
TPS92692QPWPRQ1	High-accuracy current regulator with 0.5% typical current tolerance; supports analog + PWM dimming; no reverse battery protection	Preferred for premium headlight adaptive driving beam (ADB) modules requiring ultra-precise current matching	Choose for applications demanding <1% current matching across channels; requires external reverse-protection FET and adds BOM complexity

Compared with AL8862SP-13 and TPS92692QPWPRQ1, the TLD21321EPXUMA1 offers integrated reverse polarity protection, shared ERRN diagnostics, and AEC-Q100 qualification in a compact TSDSO-14 package - making it optimal for cost-sensitive, space-constrained automotive exterior lighting where reliability and fault visibility are prioritized over raw efficiency or sub-1% matching.

Availability

TLD21321EPXUMA1 is available at Aetrix Electronics and suitable for automotive stop/tail lighting, daytime running lights, animated turn indicators, and RGB interior ambient lighting requiring stable component supply, AEC-Q100 compliance, and integrated diagnostic capability.

Supply support for TLD21321EPXUMA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global manufacturing and automotive qualification infrastructure.

The TLD21321EPXUMA1 belongs to the LITIX™ Basic+ family - engineered specifically for cost-optimized, AEC-Q100-qualified LED driver applications in exterior and interior automotive lighting, emphasizing integration, fault resilience, and thermal robustness.

FAQ

What is the maximum allowable thermal resistance (R_thJA) to sustain 240 mA continuous output?

The datasheet specifies 240 mA maximum output current is achievable only when junction temperature remains ≤150°C. With P_D ≈ 0.48 W at 240 mA and 2 V dropout, R_thJA must be ≤125°C/W for 85°C ambient. Layout with full EP soldering and 200 mm² 2-oz copper pour reduces R_thJA to ~60°C/W, enabling full-rated current in most automotive PCBs.

Can TLD21321EPXUMA1 drive LEDs directly from a 42 V load-dump transient?

Yes - the device supports VS(max) = 40 V continuously and withstands transients per ISO 7637-2 Pulse 5a (42 V, 100 ms). Its internal clamp structure and thermal protection prevent damage during validated load-dump events, provided PCB layout includes ≥100 nF ceramic + 10 µF tantalum at VS pin per Infineon layout guidelines.

How does the D-pin configure fault recovery behavior?

The D-pin selects among three fault strategies: open → default retry after 250 ms; capacitor to GND → retry interval set by C value (e.g., 100 nF = 250 ms, 1 µF = 2.5 s); tied to GND → permanent latch-off until EN/DEN reset. This allows flexible response to intermittent vs. persistent faults without MCU intervention.

Is OUT_SET pin bidirectional, and can it accept current from another driver?

No - OUT_SET is a unidirectional current source output (max 0.5 mA, 6 V rating) designed solely to drive the IN_SET pin of a second TLD2132-1EP. It cannot sink current or interface with non-LITIX™ devices. Connecting it to anything other than an IN_SET input risks undefined behavior or damage.

TLD21321EPXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: LITIX™

Package/Case:: 14-TSSOP (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Linear

Topology:: -

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 5.5V

Voltage - Supply (Max):: 40V

Voltage - Output:: 40V

Current - Output / Channel:: 180mA

Frequency:: -

Dimming:: PWM

Applications:: -

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TSDSO-14

TLD21321EPXUMA1 FAQ

1.How can I place an order for TLD21321EPXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLD21321EPXUMA1 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 TLD21321EPXUMA1 reliable?

The price and inventory of TLD21321EPXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD21321EPXUMA1 is usually 5 days.

3.What payment methods are accepted for TLD21321EPXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD21321EPXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLD21321EPXUMA1?

TLD21321EPXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLD21321EPXUMA1 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 TLD21321EPXUMA1?

For technical support, including TLD21321EPXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD21321EPXUMA1 requirements.

6.How does Aetrix verify that TLD21321EPXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLD21321EPXUMA1 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 TLD21321EPXUMA1 meets industry standards.

7.What is the process for return or replacement of TLD21321EPXUMA1?

All TLD21321EPXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLD21321EPXUMA1, 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 TLD21321EPXUMA1 part is unused and in its original packaging.

Return procedure for TLD21321EPXUMA1:

1.Submit a request within 90 days.

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

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