My Inquiry
My Account
Infineon Technologies TLD1121ELXUMA1
- Part No.:
- TLD1121ELXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLD1121ELXUMA1.pdf
- Description:
- IC LED DRVR LINEAR 360MA 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,573
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLD1121ELXUMA1 from Infineon Technologies is a single-channel high-side LED current source IC designed for automotive exterior and interior lighting. It delivers up to 360 mA output current with ±7% accuracy at RSET = 12 kΩ, operates from 5.5 V to 40 V supply, and integrates thermal protection, open-load/short-to-GND diagnosis, and PWM control via EN/VS pins-used in tail/brake light modules requiring robust fault diagnostics.
For engineers reviewing the TLD1121ELXUMA1 datasheet, TLD1121ELXUMA1 pinout, TLD1121ELXUMA1 application, or TLD1121ELXUMA1 equivalent, key selection criteria include its 360 mA max output current, PG-SSOP-14 exposed-pad thermal package, sleep-mode current of 0.1 µA, integrated OL/SC-GND detection, and VS-pin PWM capability for dynamic dimming in 12 V/24 V automotive systems.
Technical Context
The TLD1121ELXUMA1 implements a regulated high-side current source topology with internal power stage, enabling load-independent current control across varying battery voltage (8–18 V nominal) and LED forward voltage drift. Its current-setting architecture uses an external resistor on IN_SET, with optional PTC integration for overtemperature LED protection.
Diagnosis is implemented via open-drain ST pin reporting OL or SC-GND faults, while EN pin enables dual-function control: logic-level enable/disable and VS-synchronized PWM dimming. Undervoltage lockout triggers at 5 V, and thermal shutdown activates at Tj ≥ 150 °C with automatic recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current range | 180 mA (nominal, 8–18 V), up to 360 mA (max, dependent on RthJA) |
| Current accuracy | ±7% at RSET = 12 kΩ - ensures consistent LED brightness across units and temperature |
| Supply voltage range | 5.5 V to 40 V - supports 12 V/24 V automotive battery rails including load dump transients |
| Sleep mode current | 0.1 µA - enables ultra-low-power standby in always-on lighting systems |
| Junction temperature range | −40 °C to +150 °C - qualified for under-hood and cabin-mounted automotive locations |
| Diagnostic outputs | ST pin reports open-load and short-to-GND faults - eliminates need for external sense resistors or ADC monitoring |
| Thermal resistance | RthJC = 8 K/W (typ), RthJA2 = 43 K/W (2s2p board) - enables >1.5 W continuous dissipation with proper PCB copper layout |
Pinout & Package
Package: PG-SSOP-14 with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS (Pins 1,2) | Power supply input | Battery rail connection (5.5–40 V); requires local 100 nF–1 µF decoupling to GNDS/GND |
| EN (Pin 3) | Enable / PWM control input | Active-high enable; supports VS-synchronized PWM dimming without external gate driver |
| GNDS (Pin 5) | Signal ground reference | Low-noise analog reference for current setting and diagnosis; must be tied to main GND |
| IN_SET (Pin 6) | Current programming input | Connects external resistor (e.g., 12 kΩ) to set IOUT; supports PTC for thermal foldback |
| ST (Pin 10) | Fault status output | Open-drain diagnostic pin indicating OL or SC-GND; pulled high externally for fault flagging |
| OUT (Pin 12) | High-side current output | Drives LED anode; withstands 40 V reverse voltage during load dump events |
| GND (Pins 9, EP) | Power ground return | Main thermal and current return path; exposed pad must be soldered to large copper pour for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side current source | Eliminates external MOSFET and current-sense resistor; reduces BOM count and PCB area |
| VS-pin PWM dimming | Enables synchronized pulse-width modulation without dedicated PWM controller or level-shifting circuitry |
| Open-load and short-to-GND diagnosis | Provides fail-safe LED channel monitoring without adding external comparators or ADC channels |
| Reverse polarity protection | Withstands −16 V applied to VS - protects against battery misconnection in service environments |
| Thermal shutdown with auto-recovery | Halts output above 150 °C junction temperature and resumes operation once cooled below hysteresis threshold |
Applications
| Rear Combination Lamp | Interior Ambient Lighting |
|---|---|
Use Scenario: Tail/brake/turn indicator functions in compact rear lamp housing with shared PCB and thermal constraints. IC Role / Device Role / Timing Role: High-side current source regulating individual LED strings with integrated OL/SC-GND fault reporting. Use Value: Enables single-chip control of multiple LED functions while meeting ECE R7 and SAE J595 thermal and diagnostic requirements. | Use Scenario: RGB ambient lighting behind dashboard trim with variable color mixing and low standby power demand. IC Role / Device Role / Timing Role: Precision current driver for red/green/blue LED channels, supporting EN-pin PWM for smooth dimming transitions. Use Value: Delivers ±7% current matching across channels and 0.1 µA sleep current to extend vehicle battery life during parking mode. |
| Side Marker Light | Instrument Cluster Backlight |
Use Scenario: Narrow-profile side marker module mounted on door pillar with limited airflow and high ambient temperature exposure. IC Role / Device Role / Timing Role: Thermally robust high-side driver with RthJC = 8 K/W and 150 °C Tj rating for sustained 180 mA operation. Use Value: Maintains stable LED brightness without derating under 85 °C ambient, eliminating need for forced cooling or oversized heatsinks. | Use Scenario: Dimmable white LED backlight for TFT display requiring flicker-free operation and EMI compliance. IC Role / Device Role / Timing Role: Current-regulated output with VS-synchronized PWM to suppress beat frequencies between display refresh and LED drive. Use Value: Reduces conducted EMI by aligning switching edges with battery ripple, easing CISPR 25 Class 3 filtering requirements. |
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 |
|---|---|---|---|
| ON Semiconductor NCV7683 | 3-channel, 60 mA/channel, SPI-controlled, no integrated thermal protection | Requires microcontroller interface and external thermal monitoring | Select when multi-channel coordination and programmability outweigh single-channel simplicity and self-protection |
| NXP PCA9956BT | I²C interface, 16-bit PWM resolution, 120 mA/channel, no high-voltage tolerance | Limited to ≤5.5 V supply; unsuitable for direct battery connection | Choose for RGB color mixing in low-voltage interior modules where digital control and fine dimming granularity are critical |
Compared with NCV7683 and PCA9956BT, the TLD1121ELXUMA1 offers higher per-channel current (360 mA), direct 40 V battery interface, autonomous thermal/fault protection, and minimal external components-making it optimal for cost-sensitive, high-reliability single-LED automotive lighting nodes.
Availability
TLD1121ELXUMA1 is available at Aetrix Electronics and suitable for rear combination lamps, interior ambient lighting, side marker lights, and instrument cluster backlights requiring stable component supply across automotive production lifecycles.
Supply support for TLD1121ELXUMA1 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, and industrial control ICs, with global manufacturing and qualification to AEC-Q100 standards.
The LITIX™ Basic product line delivers robust, cost-optimized LED drivers for automotive lighting applications, emphasizing integrated protection, diagnostic capability, and thermal resilience in harsh environments.
FAQ
What is the maximum continuous output current for TLD1121ELXUMA1 in a typical automotive PCB layout?
The maximum continuous output current is 360 mA, achievable only when thermal resistance RthJA is ≤43 K/W (e.g., on a 2s2p FR4 board with thermal vias under the exposed pad). At nominal 8–18 V supply and standard 1s0p layout, 180 mA is recommended to maintain Tj < 150 °C under worst-case ambient conditions.
How does the ST pin indicate open-load versus short-to-GND faults?
The ST pin is an open-drain output that pulls low for both open-load and short-to-GND conditions. Differentiation requires timing analysis: ST remains low during OL after startup timeout (~1 ms), while SC-GND causes immediate ST assertion within 10 µs of fault onset. External microcontroller firmware must implement this timing-based decoding.
Can the IN_SET pin accept a PTC thermistor for temperature-dependent current reduction?
Yes - the IN_SET pin supports direct connection of a PTC thermistor in series with the RSET resistor. As temperature rises, PTC resistance increases, reducing IOUT proportionally. This provides passive LED overtemperature protection without software intervention or additional ICs.
Is reverse polarity protection active during sleep mode?
Yes - reverse polarity protection remains fully functional in sleep mode. The device withstands −16 V applied to VS regardless of EN state, preventing damage from battery misconnection during service or assembly even when the IC is disabled.
TLD1121ELXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- LITIX™
- Package/Case:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 360mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SSOP-14-EP
TLD1121ELXUMA1 FAQ
1.How can I place an order for TLD1121ELXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD1121ELXUMA1 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 TLD1121ELXUMA1 reliable?
The price and inventory of TLD1121ELXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD1121ELXUMA1 is usually 5 days.
3.What payment methods are accepted for TLD1121ELXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD1121ELXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD1121ELXUMA1?
TLD1121ELXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD1121ELXUMA1 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 TLD1121ELXUMA1?
For technical support, including TLD1121ELXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD1121ELXUMA1 requirements.
6.How does Aetrix verify that TLD1121ELXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLD1121ELXUMA1 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 TLD1121ELXUMA1 meets industry standards.
7.What is the process for return or replacement of TLD1121ELXUMA1?
All TLD1121ELXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLD1121ELXUMA1, 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 TLD1121ELXUMA1 part is unused and in its original packaging.
Return procedure for TLD1121ELXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLD1121ELXUMA1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
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
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
