TLD2314ELXUMA1 - 3-Ch 120mA LED Driver | Infineon LITIX
MPN: TLD2314ELXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.28 | $12.80 |
| 100 | $1.09 | $109.00 |
| 500 | $0.83 | $415.00 |
| 1,000 | $0.58 | $580.00 |
TLD2314ELXUMA1 Overview
A linear constant current LED driver is a semiconductor device that regulates the forward current of one or more LEDs by acting as a controlled series pass element. Unlike switching LED drivers, linear LED drivers introduce no switching noise into the supply rail, simplifying EMI compliance in sensitive automotive subsystems. Linear LED drivers sit within the broader power management IC hierarchy, alongside switching LED drivers, DC-DC converters, and voltage regulators, and are commonly used where simplicity, small PCB area, and clean analog behavior outweigh efficiency considerations.
Key features of the TLD2314ELXUMA1 include three independently-controllable output channels with a typical output current of 120 mA, very low headroom voltage, integrated protection against over-temperature, open-LED, and short-to-ground faults, and a wide supply operating range. The device offers footprint compatibility with other members of the Infineon LITIX Linear family, allowing designers to scale current or channel count without redesigning the PCB.
The TLD2314ELXUMA1 is built on a bipolar power process that integrates DMOS output stages, giving it robust current-handling capability with excellent thermal coupling to the exposed pad of the PG-SSOP-14-5 package. The exposed pad provides a low thermal resistance path to the PCB copper, enabling the part to dissipate the heat generated when driving multiple high-current LED strings without external heatsinking. Diagnostic feedback via status outputs allows the host microcontroller to detect fault conditions on each channel.
Typical applications include automotive rear combination lamps, brake lights, turn indicators, daytime running lights, interior ambient lighting, and motorcycle or e-bike lighting. The combination of high-side drive, low dropout, and integrated diagnostics makes the TLD2314ELXUMA1 particularly well suited to Body Control Module (BCM) and lighting ECU designs where each channel must be independently fault-monitored.
When designing with the TLD2314ELXUMA1, ensure that the PCB copper area on the exposed pad is sufficient to keep the junction temperature within the -40C to +150C operating range. Choose the SET resistor value to program the desired channel current, and use the diagnostic feedback to implement open-LED detection in the application firmware. Avoid using the TLD2314ELXUMA1 in applications where the supply-to-LED forward voltage differential would cause excessive dissipation; in those cases, a switching LED driver such as the TLD5097EPXUMA1 is a better fit.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and practical design notes that go beyond the manufacturer datasheet to help engineers select and qualify the TLD2314ELXUMA1 for production.
Drop-in alternatives for TLD2314ELXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLD2314ELXUMA1 (same form factor and footprint) — differing in Package, Topology, Operating Temperature Range, Automotive Qualification, Dimming Method.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLD2331ELXUMA1
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
TLD1125ELXUMA1
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.85 / Unit
View Datasheet →TLD1211SJFUMA1
✅ Drop-In✓ In Stock
$0.33 / Unit
View Datasheet →ILD8150EXUMA1
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →TLD2314ELXUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Linear LED Constant Current Driver |
| Topology | High-Side Linear Current Source |
| Number of Output Channels | 3 |
| Maximum Output Current per Channel | 120 mA |
| Supply Voltage Range | 5.5 V to 40 V |
| LED Current Setting | External sense resistor on SET pin |
| Dimming Method | Linear (analog) via SET, PWM via ENABLE |
| Dropout (Headroom) Voltage | 0.5 V typical at 100 mA |
| Operating Temperature Range | -40 C to +150 C |
| Package | PG-SSOP-14-5 (exposed pad, 14-lead) |
| Mounting Type | Surface Mount |
| Diagnostic Outputs | Open-LED, short-to-GND, over-temperature |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| RoHS Status | Compliant |
| MSL Level | MSL3 |
| Family | LITIX Basic |
TLD2314ELXUMA1 Pin Configuration
| Pin 1 | GND — Ground and exposed-pad thermal anchor |
| Pin 2 | IN — Supply voltage input (5.5V to 40V) |
| Pin 3 | EN — Enable input (active high) |
| Pin 4 | SET1 — Channel 1 current set resistor |
| Pin 5 | OUT1 — Channel 1 high-side output to LED anode |
| Pin 6 | ST1 — Channel 1 status / diagnostic output |
| Pin 7 | SET2 — Channel 2 current set resistor |
| Pin 8 | OUT2 — Channel 2 high-side output to LED anode |
| Pin 9 | ST2 — Channel 2 status / diagnostic output |
| Pin 10 | SET3 — Channel 3 current set resistor |
| Pin 11 | OUT3 — Channel 3 high-side output to LED anode |
| Pin 12 | ST3 — Channel 3 status / diagnostic output |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
Typical Applications
TLD2314ELXUMA1 is suitable for 6 applications: Automotive Rear Combination Lamps (RCL), Daytime Running Light (DRL) Control, Automotive Interior Ambient Lighting, Motorcycle / E-Bike LED Lighting, Industrial LED Signal and Stack Lights, LED Status Indicators on Power Modules.
Automotive Rear Combination Lamps (RCL)
The TLD2314ELXUMA1 drives the three independent LED strings of an automotive rear combination lamp: tail, brake, and turn indicator, with each channel delivering up to 120 mA. Its high-side drive topology eliminates the need for LED-string-to-ground return wiring, simplifying PCB layout and harness routing in tail-lamp assemblies. Per-channel open-LED, short-to-GND, and over-temperature diagnostics feed directly into the body control module (BCM), which can then flag a lamp failure on the dashboard without an external sense circuit. AEC-Q100 qualification and -40C to +150C operation ensure the part survives under-hood thermal stress and cold-start conditions.
Recommended
Daytime Running Light (DRL) Control
The TLD2314ELXUMA1 is well matched to a DRL module in which the high-side linear topology provides clean, EMI-free current regulation for 3 LED strings, each at 120 mA. DRL modules often run continuously while the engine is on, so a linear driver with low quiescent losses and no switching ripple is preferred. The exposed thermal pad of the PG-SSOP-14-5 package provides efficient heat extraction from the three simultaneously-driven channels on the DRL PCB. Open-LED detection allows the BCM to alert the driver to a failed DRL LED without additional wiring.
Recommended
Automotive Interior Ambient Lighting
For interior ambient lighting with three independent LED zones (footwell, door trim, dashboard), the TLD2314ELXUMA1 provides compact, AEC-Q100 qualified 120 mA per-channel drive. The wide 5.5 V to 40 V supply range tolerates cranking transients on the 12 V vehicle bus without flicker or shutdown. Smooth analog dimming via the SET pin enables gradual brightness transitions typically required for premium interior lighting. The exposed-pad PG-SSOP-14-5 package fits in the small form factor of in-door lamp modules.
Recommended
Motorcycle / E-Bike LED Lighting
The TLD2314ELXUMA1 drives headlamp low-beam, high-beam indicator, and position-light LED strings on a 12 V motorcycle or e-bike electrical system. Its small PG-SSOP-14-5 footprint suits space-constrained two-wheeler lamp housings. The high-side drive allows the LED cathodes to be grounded directly to chassis, reducing wiring complexity. AEC-Q100 qualification and the wide -40C to +150C operating range handle the harsh thermal environment of an enclosed headlamp behind a polycarbonate lens.
Recommended
Industrial LED Signal and Stack Lights
Beyond automotive, the TLD2314ELXUMA1 suits industrial stack-light and machine-status indicators where three colored LEDs (red/yellow/green) must be driven independently from a 24 V PLC output rail. The 5.5 V to 40 V supply range matches the common 24 V industrial bus, and the linear drive topology avoids switching EMI that could couple into adjacent analog sensor channels. Per-channel diagnostics detect burned-out indicator lamps in process-control panels, reducing maintenance trips.
Recommended
LED Status Indicators on Power Modules
The TLD2314ELXUMA1 is used in DC-DC converter and power module reference designs to drive three status LEDs (power-good, fault, and enable). The linear driver topology introduces no switching noise into sensitive analog feedback paths, and the wide supply range accepts the same input rail as the power module. The PG-SSOP-14-5 exposed-pad package provides robust thermal coupling when mounted on the same aluminum-core PCB as the power stage.
Recommended
Recommended Products Summary
Engineering reference data for TLD2314ELXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLD2331ELXUMA1 | TLD1125ELXUMA1 | TLD1211SJFUMA1 | ILD8150EXUMA1 |
|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-SSOP-14-5 | PG-SSOP-14-5 - same | PG-SSOP-14-5 - same | PG-SSOP-14-5 - same | PG-SSOP-14-5 - same |
| Number of Channels | 3 | 3 | 1 | 1 | 1 (buck) |
| Output Current per Channel | 120 mA | 150 mA | 250 mA (single) | 250 mA (single) | 80 mA (buck) |
| Supply Voltage Range | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 40 V | 8 V to 30 V |
| Topology | High-side linear | High-side linear | High-side linear | High-side linear | Buck (switching) |
| Diagnostics | Open-LED, short-to-GND, OT | Open-LED, short-to-GND, OT | Open-LED, short-to-GND, OT | Open-LED, short-to-GND, OT | Limited |
| AEC-Q100 | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- 3 independent channels in one PG-SSOP-14-5 package (vs TLD1125ELXUMA1)
- Per-channel open-LED and short-to-GND diagnostics (vs ILD8150EXUMA1)
- Linear topology for clean EMC (vs TLD5097EPXUMA1)
Design Notes
Estimated: at 3 x 120 mA load and a 5 V headroom, the TLD2314ELXUMA1 dissipates approximately 1.8 W in the package. The PG-SSOP-14-5 exposed pad has a typical theta_JA of around 35 C/W on a 1-square-inch 2-oz copper pour, leading to a junction temperature rise of ~63C above ambient. For continuous operation at 85C ambient, ensure at least 1.5 square inches of copper on the exposed pad and consider thermal vias to inner copper planes. Always derate to a Tj_max of 150C per the datasheet.
Place the SET resistors as close as possible to the corresponding SET pins to minimize noise pickup on the high-impedance reference node. Use a star-ground topology with the exposed pad as the single ground anchor; avoid routing high-current LED return currents through the SET resistor ground. Add a 100 nF ceramic decoupling capacitor on IN close to pin 2, and consider a 10 uF bulk capacitor on the supply rail for load-dump transients on 12 V / 24 V vehicle buses.
Do not exceed the 40 V absolute maximum supply voltage; load-dump transients on 12 V automotive buses can reach 35 V. Always include a TVS diode (such as a 36 V SMBJ) on the supply rail for 12 V systems or 60 V SMBJ for 24 V systems. Do not leave unused channels floating - tie the SET pin to GND through a resistor to disable the channel cleanly, otherwise the output stage remains active and may oscillate. Verify the headroom voltage (V_IN - V_LED) is at least 0.5 V at full current to stay out of dropout.
Compliance Information
AEC-Q100 qualified per Infineon LITIX Basic family datasheet. RoHS and REACH compliant. Halogen-free per JEDEC JS709. Conflict-minerals declaration available on Infineon product page.
