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Infineon Technologies TLD55421QVXUMA1
- Part No.:
- TLD55421QVXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TLD55421QVXUMA1.pdf
- Description:
- IC LED DRVR CTRL PWM 90MA 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
TLD55421QVXUMA1 from Infineon is a synchronous MOSFET H-bridge DC/DC controller for high-power LED driving, supporting buck-boost topology with 4.5 V–55 V power input, 200 kHz–700 kHz adjustable switching frequency, and SPI-based diagnostics/control. It delivers constant current (±3% accuracy) and constant voltage regulation, features Fast Output Discharge and Limp Home fail-safe mode, and targets automotive exterior lighting such as full LED headlamps.
For engineers reviewing the TLD55421QVXUMA1 datasheet, TLD55421QVXUMA1 pinout, TLD55421QVXUMA1 application, or TLD55421QVXUMA1 equivalent, key selection criteria include dual high-side/low-side gate drive capability (RDS(ON) = 2.3 Ω / 1.2 Ω), integrated analog/PWM dimming, EMC-optimized Auto Spread Spectrum, and AEC-Q100 qualification for harsh automotive environments.
Technical Context
The TLD55421QVXUMA1 implements a current-mode control architecture with dual feedback loops: one for LED current via FBH/FBL inputs and another for output voltage via VFB. Its H-bridge driver stage supports independent high-side (HSGD1/HSGD2) and low-side (LSGD1/LSGD2) gate outputs with bootstrap biasing (BST1/BST2) and switch-node referenced operation (SWN1/SWN2).
It integrates an 8-bit DAC for analog dimming, dedicated current sense amplifiers (SWCS/SGND, IIN1/IIN2), and SPI-configurable protection thresholds including overtemperature prewarning, input undervoltage lockout (EN/INUVLO), and output overvoltage detection (FBH/FBL). The device operates in forced continuous conduction mode to enhance EMC performance.
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 (4.5 V) and load-dump (55 V) conditions. |
| VVIN Range | 4.5 V to 40 V - Digital supply domain compatible with standard 5 V or 3.3 V microcontroller I/O rails. |
| fSW | 200 kHz to 700 kHz - Adjustable via external resistor (FREQ pin) or external clock (SYNC pin); enables EMI optimization and layout flexibility. |
| LED Current Accuracy | ±3% - Achieved via precision internal current sense amplifier and calibrated feedback path (FBH/FBL), critical for consistent luminance in safety-critical lighting. |
| RDS(ON) (PU/PD) | 2.3 Ω / 1.2 Ω at Tj = 25°C - Low gate driver on-resistance minimizes power loss during MOSFET switching in high-current H-bridge configurations. |
| SPI Clock Max | 5 MHz - Enables fast configuration and real-time diagnostic readback without burdening host MCU bandwidth. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C ambient) - Qualified for under-hood automotive applications with validated thermal shutdown and restart behavior. |
Pinout & Package
Package: PG-VQFN-48 (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed pad (EP) for PCB heatsinking. Pin count: 48, including 4 dedicated gate drivers, 2 current sense inputs, 3 feedback inputs, and full SPI interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HSGD1, HSGD2 | High-side gate driver outputs | Drive top n-channel MOSFETs with bootstrapped voltage referenced to SWN1/SWN2; support up to 5.5 V gate swing. |
| LSGD1, LSGD2 | Low-side gate driver outputs | Drive bottom n-channel MOSFETs referenced to PGND1/PGND2; enable synchronous rectification and bidirectional current control. |
| FBH, FBL | LED current feedback inputs | Differential sensing of LED string current; sets regulation point for constant-current operation in buck-boost topology. |
| VIN, VDD, IVCC_EXT | Power supply inputs | VIN powers internal bias circuitry; VDD supplies digital logic; IVCC_EXT allows external LDO sourcing for gate drivers to improve thermal margin. |
| CSN, SCLK, SI, SO | SPI interface signals | Full-duplex 4-wire SPI with pull-up/pull-down integrated; supports diagnostics, register access, and real-time fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Spread Spectrum modulation | Reduces peak EMI by dithering switching frequency ±5%, enabling compliance with CISPR 25 Class 5 without added shielding or filtering. |
| Fast Output Discharge (FOD) | Enables rapid LED string discharge after shutdown, eliminating residual glow and meeting automotive safety requirements for immediate light-off control. |
| Limp Home function (LHI pin) | Hardware-triggered fail-safe mode that forces predefined reduced-output operation (e.g., DRL-only) upon detected fault, preserving partial functionality. |
| Integrated analog dimming DAC | 8-bit resolution DAC with VFB_VIN compensation input enables precise brightness control across varying input voltage without MCU intervention. |
| Dual current monitoring paths | IOUTMON (LED current) and IINMON (input current) provide independent, rail-to-rail analog monitor outputs for system-level diagnostics and closed-loop power management. |
Applications
| Automotive Low Beam Headlamp | Automotive High Beam Headlamp |
|---|---|
|
Use Scenario: Adaptive driving beam system requiring independent control of low-beam LED arrays with dynamic current adjustment. IC Role / Device Role / Timing Role: Primary buck-boost LED current controller with SPI-configurable dimming profiles and real-time current feedback. Use Value: ±3% LED current accuracy ensures uniform photometric output across temperature; Fast Output Discharge prevents ghosting during beam pattern transitions. |
Use Scenario: High-intensity LED module delivering >1000 lm output with thermal derating and fault containment. IC Role / Device Role / Timing Role: Dual-channel H-bridge controller managing parallel LED strings while maintaining synchronized PWM dimming. Use Value: Limp Home activation via LHI pin sustains partial illumination (e.g., 30% intensity) during open-load faults, satisfying ASIL-B functional safety requirements. |
| Daytime Running Light (DRL) | Automotive Fog Lamp |
|
Use Scenario: Always-on LED array operating continuously at elevated ambient temperatures with strict efficiency targets. IC Role / Device Role / Timing Role: Constant-current regulator with analog dimming compensation (VFB_VIN) to maintain luminance stability across battery voltage variation (9–16 V). Use Value: Up to 96% peak efficiency reduces thermal load on PCB; integrated thermal shutdown with autorestart avoids permanent shutdown during transient overheating. |
Use Scenario: High-vibration, moisture-prone fog lamp assembly requiring robust fault detection and recovery. IC Role / Device Role / Timing Role: Fault-aware LED driver with latched diagnostics (via SPI), short-circuit protection, and end-of-MFS flag (EOMFS) for startup sequence validation. Use Value: Dedicated IIN1/IIN2 current sense inputs enable accurate input power monitoring for anti-theft and usage logging; AEC-Q100 qualification ensures reliability in IP67-rated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20052ATP/V+T | Single-channel buck controller only; no H-bridge or boost capability; lacks SPI interface and Limp Home function. | Restricted to fixed-brightness, non-fail-safe LED loads; unsuitable for adaptive beam or multi-function headlamps. | Select when cost-sensitive, single-string, non-AEC-Q100 applications require minimal feature set and lower BOM count. |
| TPS92692QPWPRQ1 | Two-channel linear LED driver with integrated MOSFETs; no inductor-based topology; limited to 40 V max output. | Only viable for low-power, low-thermal-density applications; cannot support >55 V LED strings or buck-boost conversion. | Prefer where ultra-low EMI and simplicity outweigh efficiency and voltage range needs-e.g., interior ambient lighting. |
Compared with MAX20052ATP/V+T and TPS92692QPWPRQ1, the TLD55421QVXUMA1 uniquely combines H-bridge buck-boost topology, AEC-Q100 qualification, SPI diagnostics, and Limp Home-enabling single-chip solutions for full-featured automotive exterior lighting systems.
Availability
TLD55421QVXUMA1 is available at Aetrix Electronics and suitable for automotive exterior lighting, adaptive driving beam systems, and high-reliability LED power management requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for TLD55421QVXUMA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and R&D infrastructure.
The TLD55421QVXUMA1 belongs to Infineon's LITIX™ Power Flex family-designed specifically for scalable, high-efficiency LED driver architectures in automotive lighting, emphasizing functional safety, EMC robustness, and software-configurable operation.
FAQ
What package type is used for TLD55421QVXUMA1?
The TLD55421QVXUMA1 uses the PG-VQFN-48 package: 7 mm × 7 mm body, 0.5 mm pitch, with an exposed thermal pad (EP) for direct PCB heatsinking. This package meets AEC-Q100 mechanical stress requirements and supports high-power dissipation in compact automotive modules.
Does TLD55421QVXUMA1 support synchronization to an external clock?
Yes-the SYNC pin accepts an external clock signal (up to 5 MHz) to synchronize switching frequency across multiple controllers, reducing beat frequencies and improving EMI performance in multi-channel LED systems such as matrix headlamps.
How is LED current accuracy maintained across temperature?
LED current accuracy of ±3% is achieved through matched internal current sense amplifiers, factory-trimmed feedback path gain, and differential sensing (FBH/FBL) with low-drift external resistors. Thermal drift compensation is implemented in the analog front-end, not dependent on digital calibration.
Can TLD55421QVXUMA1 operate without an external microcontroller?
Yes-it supports standalone operation using analog dimming (PWMI, VFB_VIN, DIM_HALF), hardware-enables (EN/INUVLO), and preset protection thresholds. SPI is optional for advanced diagnostics and dynamic reconfiguration; core LED regulation functions remain fully autonomous.
TLD55421QVXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- LITIX™
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 55V
- Voltage - Output:
- 2V ~ 55V
- Current - Output / Channel:
- 90mA
- Frequency:
- 200kHz ~ 700kHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-48-31
TLD55421QVXUMA1 FAQ
1.How can I place an order for TLD55421QVXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD55421QVXUMA1 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 TLD55421QVXUMA1 reliable?
The price and inventory of TLD55421QVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD55421QVXUMA1 is usually 5 days.
3.What payment methods are accepted for TLD55421QVXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD55421QVXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD55421QVXUMA1?
TLD55421QVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD55421QVXUMA1 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 TLD55421QVXUMA1?
For technical support, including TLD55421QVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD55421QVXUMA1 requirements.
6.How does Aetrix verify that TLD55421QVXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLD55421QVXUMA1 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 TLD55421QVXUMA1 meets industry standards.
7.What is the process for return or replacement of TLD55421QVXUMA1?
All TLD55421QVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLD55421QVXUMA1, 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 TLD55421QVXUMA1 part is unused and in its original packaging.
Return procedure for TLD55421QVXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLD55421QVXUMA1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
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
-
BCR421UFD-7
Diodes Incorporated
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