TLD1125ELXUMA1 - 1-Ch 360mA Linear LED Driver | Infineon LITIX
MPN: TLD1125ELXUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.5539 | $1.55 |
| 10 | $1.4 | $14.00 |
| 100 | $1.15 | $115.00 |
| 500 | $0.98 | $490.00 |
| 1,000 | $0.85 | $850.00 |
TLD1125ELXUMA1 Overview
What is a linear LED driver? A linear LED driver is a semiconductor device that regulates the current flowing through an LED string by dissipating excess voltage as heat across an internal pass element, instead of switching the inductor as a DC-DC converter does. Linear LED drivers sit within the broader power-management IC hierarchy: linear LED driver -> constant-current driver -> LED driver -> power management IC -> semiconductor. They are valued for low EMI, no inductor requirement, and very small PCB footprint, at the cost of reduced electrical efficiency compared to switching topologies.
The TLD1125EL integrates an output stage that sustains load currents up to 360 mA, supports PWM dimming for precise brightness modulation, and includes protection features such as over-temperature shutdown, open-LED detection, and short-to-ground protection. Its 14-pin SSOP with exposed pad enables efficient heat removal on the PCB copper, which is essential because the linear topology converts the VIN-VLED drop into thermal energy. Automotive qualification per AEC-Q100 makes it directly suitable for tail lamps, daytime running lights (DRL), turn indicators, and interior ambient lighting.
The output stage architecture combines a reference, error amplifier, and power transistor monolithically, achieving tight output-current accuracy and stable behavior across temperature. The exposed thermal pad (EP) on the bottom of the package provides a low thermal-resistance path to the PCB copper, enabling sustained high-current operation without external heatsinking.
Typical applications include automotive rear combination lamps, turn signal indicators, daytime running lights, interior ambient lighting, and industrial signage or status indicators. Its footprint compatibility with other Infineon LITIX Basic family members allows platform reuse across lighting variants with different current ratings.
When designing with this part, size the PCB copper pour beneath the exposed pad to keep the junction temperature below 150 C, and ensure that VIN does not exceed the absolute maximum rating even during load-dump transients. Place the decoupling capacitor close to the supply pin to stabilize the internal reference.
This page synthesizes distributor pricing, pin-to-pin compatible alternatives, and practical design notes that supplement the manufacturer datasheet for faster engineering decisions.
Drop-in alternatives for TLD1125ELXUMA1 β 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 TLD1125ELXUMA1 (same form factor and footprint) β differing in Package, Topology, Dimming Method, Operating Temperature Range, Output Current per Channel.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLD1125EL
β Drop-Inπ Reference alternative (not in catalog)
TLF11251LDXUMA1
β Drop-Inβ In Stock
$0.98 / Unit
View Datasheet βTLF11251EPXUMA1
β Drop-Inβ In Stock
$0.92 / Unit
View Datasheet βTLD21313EPXUMA1
β Drop-Inβ In Stock
$0.98 / Unit
View Datasheet βTLD21421EPXUMA1
β Drop-Inβ In Stock
$0.78 / Unit
View Datasheet βTLD1125ELXUMA1 Maximum Ratings & Electrical Characteristics
| Topology | Linear Constant-Current LED Driver |
| Number of Channels | 1 |
| Maximum Output Current | 360 mA |
| Dimming Control | PWM |
| Operating Temperature Range | -40 C to +150 C (junction) |
| Package | PG-SSOP-14-EP (14-LSSOP with exposed pad) |
| Package Outline | 0.154 in / 3.90 mm body width |
| Mounting Type | Surface Mount |
| Protection Features | Over-temperature shutdown, Open-LED detection, Short-to-GND protection |
| Automotive Qualification | AEC-Q100 qualified |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Family | LITIX Basic |
TLD1125ELXUMA1 Pin Configuration
| Pin 1 | IN β Supply input |
| Pin 2 | IN β Supply input |
| Pin 3 | PWM β PWM dimming input / enable |
| Pin 4 | GND β Ground |
| Pin 5 | OUT β Constant-current output to LED anode |
| Pin 6 | DIAG β Diagnostic output (open-LED / short-to-GND flag) |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | NC β Not connected (per datasheet) |
| Pin 9 | NC β Not connected (per datasheet) |
| Pin 10 | NC β Not connected (per datasheet) |
| Pin 11 | NC β Not connected (per datasheet) |
| Pin 12 | NC β Not connected (per datasheet) |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | NC β Not connected (per datasheet) |
| Pin EP | EPAD β Exposed thermal pad (must be soldered to PCB copper for heatsinking) |
Typical Applications
TLD1125ELXUMA1 is suitable for 6 applications: Automotive Rear Combination Lamps, Daytime Running Lights (DRL), Turn Signal Indicators, Interior Ambient Lighting, Industrial Status Indicators, Architectural LED Strip Drivers.
Automotive Rear Combination Lamps
The TLD1125ELXUMA1 is ideally suited for driving automotive rear combination lamps, where one channel delivers up to 360 mA to power tail-light LED strings. Its AEC-Q100 qualification, integrated protection features, and 14-pin PG-SSOP-14-EP footprint allow compact PCB integration behind the lamp assembly. The driver regulates constant current independent of supply variation across 12 V automotive buses, including cold-crank and load-dump events. PWM dimming supports stop-light and tail-light brightness differentiation.
Recommended
Daytime Running Lights (DRL)
The TLD1125ELXUMA1 drives DRL LED strings with linear constant-current regulation up to 360 mA, eliminating the inductor required by switching topologies and reducing EMI in the sensitive RF environment of a front-light module. PWM dimming enables DRL-on and indicator-off brightness differentiation from the same LED string. AEC-Q100 qualification supports under-hood and front-bumper thermal environments. The exposed thermal pad permits PCB copper heatsinking for sustained 360 mA operation.
Recommended
Turn Signal Indicators
The TLD1125ELXUMA1 provides linear constant-current drive for turn-signal LED strings at up to 360 mA per channel, supporting the pulsating brightness pattern required by automotive regulations. Its PWM dimming input is driven by the body-control module to produce the 1 Hz on/off cadence, while integrated short-to-ground protection guards against harness faults. The 14-pin SSOP-EP package fits within the compact turn-signal housing. AEC-Q100 qualification supports under-hood thermal stress.
Recommended
Interior Ambient Lighting
The TLD1125ELXUMA1 enables smooth, dimmable interior ambient lighting through its PWM dimming interface, with constant-current regulation up to 360 mA. The 14-pin PG-SSOP-14-EP footprint allows placement in space-constrained door-panel and dashboard LED modules. Low quiescent current and AEC-Q100 qualification suit battery-aware interior lighting architectures. PWM dimming depth enables precise color-temperature blending across RGB ambient LED chains driven by companion TLD21313EP channels.
Recommended
Industrial Status Indicators
The TLD1125ELXUMA1 functions as a constant-current driver for industrial status-indicator LED panels, where each channel sources up to 360 mA for high-visibility stack lights or panel-mount indicators. Linear topology avoids the EMI of switching drivers that could interfere with nearby industrial sensors. PWM dimming allows brightness adjustment for daylight vs nighttime visibility. The exposed thermal pad supports high-ambient industrial enclosures without external heatsinking.
Recommended
Architectural LED Strip Drivers
The TLD1125ELXUMA1 drives architectural and signage LED strips from a regulated 24 V industrial bus, providing 360 mA constant current with linear regulation that eliminates inductor EMI concerns near sensitive RF or audio equipment. PWM dimming integrates with building-automation control systems. The PG-SSOP-14-EP package supports reflow soldering onto standard FR-4 LED-driver PCBs. The exposed thermal pad accepts a copper pour sized to the application power dissipation.
Recommended
Recommended Products Summary
Engineering reference data for TLD1125ELXUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLD1125EL | TLF11251LDXUMA1 | TLF11251EPXUMA1 | TLD21313EPXUMA1 | TLD21421EPXUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-SSOP-14-EP | PG-SSOP-14-EP (same) | PG-SSOP-14-EP (same) | PG-SSOP-14-EP (same) | PG-SSOP-14-EP (same) | PG-SSOP-14-EP (same) |
| Number of Channels | 1 | 1 | 1 | 1 | 3 | 3 |
| Topology | Linear constant-current | Linear constant-current | Linear constant-current | Linear constant-current | Linear constant-current | Linear constant-current |
| Dimming | PWM | PWM | PWM | PWM | PWM | PWM |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| Integrated Protection | OTP, Open-LED, Short-to-GND | OTP, Open-LED, Short-to-GND | OTP, Open-LED, Short-to-GND | OTP, Open-LED, Short-to-GND | OTP, Open-LED, Short-to-GND | OTP, Open-LED, Short-to-GND |
| Family | LITIX Basic | LITIX Basic | LITIX | LITIX | LITIX Basic | LITIX Basic |
Key Differentiators
- Highest single-channel current in the LITIX Basic family at this footprint (vs TLD21313EPXUMA1)
- Identical silicon to TLD1125EL with tape-and-reel packaging suffix (vs TLD1125EL)
- Linear topology eliminates inductor EMI (vs Switching LED driver (e.g. buck topology))
Design Notes
Estimated: in linear LED-driver topology, the IC dissipates P = (VIN - VLED) x ILED. At VIN = 14 V (automotive nominal), VLED = 9 V (three white LEDs), and ILED = 360 mA, dissipation is about 1.8 W. The PG-SSOP-14-EP exposed thermal pad must be soldered to a PCB copper pour of at least 1 square inch to maintain the junction temperature below 150 C. If VIN rises above VLED by more than 5 V, de-rate ILED or add external heatsinking. Always cross-check with the thermal-resistance data in the manufacturer datasheet.
Place the supply decoupling capacitor (typically 100 nF ceramic) as close as possible to the IN pins. Keep the high-current loop from IN to LED to ground as short as possible to minimize parasitic inductance. The exposed thermal pad requires thermal vias (typically 5-9 vias of 0.3 mm diameter) directly beneath the pad to conduct heat into inner PCB copper layers. Pin 1 indicator dot identifies the orientation during optical inspection.
Do not connect the diagnostic pin to voltages above the absolute maximum rating. During load-dump events (ISO 7637), VIN can surge up to 40 V - ensure the input capacitor and TVS protection support the application. The PWM input should be driven from a clean logic signal - any glitch on PWM appears as visible LED flicker. For diagnostic-flagged open-LED conditions, route the DIAG signal back to the body-control MCU for fault logging per automotive OEM requirements.
Compliance Information
AEC-Q100 qualified per Infineon LITIX Basic family datasheet. RoHS and lead-free confirmed by distributor listings.
