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Infineon Technologies TLD55411QUXUMA1
- Part No.:
- TLD55411QUXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 48-TQFP Exposed Pad
- Datasheet:
-
TLD55411QUXUMA1.pdf
- Description:
- IC LED DRIVER CTRLR PWM TQFP48-9
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
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Product details
Overview
TLD55411QUXUMA1 from Infineon Technologies is a synchronous MOSFET H-bridge DC/DC controller for high-power LED driving, supporting buck-boost topology with 4.5–55 V power input, 200–700 kHz adjustable switching frequency, and SPI-based diagnostics. It delivers ±3% LED current accuracy, up to 96% efficiency, and integrated limp-home fail-safe mode for automotive headlamp systems.
For engineers reviewing the TLD55411QUXUMA1 datasheet, TLD55411QUXUMA1 pinout, TLD55411QUXUMA1 application, or TLD55411QUXUMA1 equivalent, key selection criteria include H-bridge gate driver capability (HSGD1/LSGD1/HSGD2/LSGD2), dual current sense (SWCS/SGND + IIN1/IIN2), analog/PWM dimming support, and AEC-Q100 qualification for harsh automotive environments.
Technical Context
The TLD55411QUXUMA1 implements a current-mode control architecture with dual error amplifiers for independent LED current (FBH/FBL) and output voltage (VFB) regulation. Its programmable spread-spectrum modulation and forced continuous conduction mode reduce EMI emissions without external filtering.
It integrates two independent high-side/low-side gate drivers (RDS(ON)_PU = 2.3 Ω, RDS(ON)_PD = 1.2 Ω at 25°C) with bootstrap supplies (BST1/BST2), dedicated current sense inputs (SWCS/SGND), and dual monitor outputs (IOUTMON, IINMON) providing scaled analog representations of LED and input currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VPOW Range | 4.5 V to 55 V - supports wide-input automotive battery systems including cold-crank and load-dump conditions. |
| VVIN Range | 4.5 V to 40 V - digital supply range compatible with 5 V or 3.3 V MCU interfaces. |
| fSW | 200 kHz to 700 kHz - adjustable via FREQ pin resistor; enables optimization of efficiency vs. EMI vs. component size. |
| LED Current Accuracy | ±3% - achieved via precision internal current sense amplifier and calibration circuitry. |
| SPI Clock Max | 5 MHz - supports fast diagnostic readback and real-time configuration updates in safety-critical lighting systems. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C ambient) - qualified for under-hood and headlamp module deployment. |
| IOUTMON Scaling | 1.4 V at 150 mV FBH–FBL differential - provides linear, temperature-stable LED current monitoring for closed-loop feedback. |
Pinout & Package
Package: PG-VQFN-48-31 (exposed thermal pad), thermally enhanced for automotive LED driver applications requiring high power dissipation and board-level reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HSGD1, HSGD2 | High-side gate driver outputs | Drive external n-channel MOSFETs with bootstrapped voltage referenced to SWN1/SWN2; enable synchronous rectification in buck-boost paths. |
| LSGD1, LSGD2 | Low-side gate driver outputs | Directly drive low-side n-MOSFETs between PGND and IVCC_EXT; support 1.2 Ω typical RDS(ON) pull-down strength. |
| SWN1, SWN2 | Switch node terminals | Connect to external inductor and MOSFET bridges; swing from −1 V to 60 V; require tight layout for EMI and shoot-through prevention. |
| FBH / FBL | LED current sense inputs | Differential pair sensing LED string current via external shunt; enable constant-current regulation with ±3% accuracy. |
| IOUTMON | Analog LED current monitor output | Provides 200 mV + 8×(FBH–FBL) voltage output - enables external ADC sampling without additional gain stages. |
| LHI | Limp-home activation input | Pull-low to force fail-safe operation: reduces LED output to predefined safe level during fault conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Spread Spectrum | Reduces peak EMI by modulating fSW dynamically - eliminates need for large EMI filters in compact headlamp modules. |
| Fast Output Discharge | Enables rapid LED turn-off (<100 µs) via controlled discharge path - critical for adaptive driving beam (ADB) pixel light response timing. |
| Dual Dimming Interface | Supports simultaneous analog (PWMI voltage) and PWM (PWMI pulse) dimming - allows seamless integration with legacy and next-gen lighting controllers. |
| Open Load Detection | Latched diagnosis via SPI register - identifies broken LED strings during ON-state without interrupting operation or requiring external comparators. |
| Thermal Prewarning | Signals junction temperature >125°C via SPI before shutdown - enables predictive thermal derating in matrix LED systems. |
Applications
| Automotive Full-LED Headlamp | Matrix Beam Lighting System |
|---|---|
Use Scenario: Driving low-beam and high-beam functions in modern OEM headlamps with single-chip multi-string control. IC Role / Device Role / Timing Role: H-bridge DC/DC controller regulating up to four independent LED strings with synchronized buck-boost conversion and SPI-configurable dimming curves. Use Value: Eliminates need for multiple discrete controllers; achieves <1% inter-string current mismatch across temperature and lifetime. | Use Scenario: Pixel-level illumination control in adaptive front-lighting systems (AFS) with 256+ individually addressable LEDs. IC Role / Device Role / Timing Role: Core current regulator enabling microsecond-level PWM dimming resolution and fast output discharge for dynamic beam shaping. Use Value: Supports <50 µs pixel switching latency and real-time fault masking per segment via SPI latched diagnostics. |
| Automotive Rear Combination Lamp | Commercial Vehicle Daytime Running Light (DRL) |
Use Scenario: Integrated tail/brake/turn signal functions using shared high-brightness LED arrays with varying current profiles. IC Role / Device Role / Timing Role: Dual-regulation controller delivering constant current for brake mode and constant voltage for turn signal flasher compatibility. Use Value: Reduces BOM count by merging three traditional driver ICs; maintains ±3% current accuracy across 12–24 V vehicle platforms. | Use Scenario: High-reliability DRL modules in trucks and buses exposed to wide temperature swings and vibration. IC Role / Device Role / Timing Role: Robust buck-boost LED driver with limp-home mode activated on overtemperature or open-load faults. Use Value: Ensures minimum 30% luminous output during fault conditions - meets ECE R87 and SAE J2344 functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar H-bridge LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20052ATP/V+T | Single-channel buck-boost LED controller; no H-bridge gate drivers; requires external MOSFETs for full bridge. | Lacks integrated dual high/low-side drivers and SPI diagnostics; suited for simpler, lower-cost headlamp sub-modules. | Select when system uses discrete MOSFETs and does not require limp-home or open-load detection. |
| TPS92692QPWPRQ1 | Multi-topology controller (buck/boost/SEPIC); includes integrated gate drivers but only one H-bridge channel; no spread spectrum. | Supports fewer LED strings and lacks auto-spread-spectrum EMI reduction - less suitable for dense matrix layouts. | Prefer for cost-sensitive rear lamp designs where EMI margin is relaxed and single-string control suffices. |
Compared with MAX20052ATP/V+T and TPS92692QPWPRQ1, the TLD55411QUXUMA1 uniquely integrates dual H-bridge drivers, SPI-based diagnostics, and limp-home functionality - making it the only option qualified for AEC-Q100 Grade 1 matrix beam systems requiring functional safety compliance and real-time fault response.
Availability
TLD55411QUXUMA1 is available at Aetrix Electronics and suitable for automotive exterior lighting, adaptive driving beam (ADB) modules, and commercial vehicle DRL systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for TLD55411QUXUMA1 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 electronics, and industrial control ICs, with global manufacturing and automotive qualification infrastructure.
The TLD55411QUXUMA1 belongs to Infineon's LITIX™ Power Flex family - designed specifically for scalable, high-efficiency LED driver solutions in automotive lighting, emphasizing functional safety, EMC robustness, and multi-topology flexibility.
FAQ
What is the function of the LHI pin?
The LHI (Limp Home Input) pin is a dedicated active-low digital input that forces the device into fail-safe operation when pulled low. In this mode, LED current is reduced to a preconfigured safe level while maintaining basic illumination - critical for meeting automotive functional safety requirements during thermal or electrical faults.
How does the IOUTMON pin provide LED current feedback?
IOUTMON outputs an analog voltage equal to 200 mV plus 8 times the differential voltage between FBH and FBL (i.e., 1.4 V at 150 mV). This scaling allows direct connection to a microcontroller's ADC without external amplification, preserving ±3% current measurement accuracy across temperature and supply variations.
Can the TLD55411QUXUMA1 operate in standalone mode without SPI communication?
Yes - all core regulation functions (constant current/voltage, soft-start, protection, dimming) operate autonomously using analog pins (PWMI, FREQ, EN/INUVLO). SPI is optional and used only for diagnostics, advanced configuration, and latched fault reporting; no SPI interface is required for basic LED driving operation.
What is the purpose of the SWCS and SGND pins?
SWCS (Switch Current Sense) and SGND form a differential input pair measuring inductor current in the power stage. SWCS is the non-inverting input, SGND the inverting input; they must be routed as a tightly coupled differential pair to reject common-mode noise and ensure accurate current-mode control loop stability and overcurrent protection triggering.
TLD55411QUXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- LITIX™
- Package/Case:
- 48-TQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 55V
- Current - Output / Channel:
- -
- Frequency:
- 200kHz ~ 700kHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TQFP-48-9
TLD55411QUXUMA1 FAQ
1.How can I place an order for TLD55411QUXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD55411QUXUMA1 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 TLD55411QUXUMA1 reliable?
The price and inventory of TLD55411QUXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD55411QUXUMA1 is usually 5 days.
3.What payment methods are accepted for TLD55411QUXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD55411QUXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD55411QUXUMA1?
TLD55411QUXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD55411QUXUMA1 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 TLD55411QUXUMA1?
For technical support, including TLD55411QUXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD55411QUXUMA1 requirements.
6.How does Aetrix verify that TLD55411QUXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLD55411QUXUMA1 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 TLD55411QUXUMA1 meets industry standards.
7.What is the process for return or replacement of TLD55411QUXUMA1?
All TLD55411QUXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLD55411QUXUMA1, 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 TLD55411QUXUMA1 part is unused and in its original packaging.
Return procedure for TLD55411QUXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLD55411QUXUMA1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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