Infineon Technologies TLD5190QVXUMA1

Overview

TLD5190QVXUMA1 from Infineon is a synchronous H-bridge DC/DC controller for high-power LED driving, supporting buck-boost topology with 4.5 V–40 V device input, 4.5 V–55 V power-stage input, 200–700 kHz adjustable switching frequency, ±3% LED current accuracy, and AEC-Q100 qualification for automotive use.

For engineers reviewing the TLD5190QVXUMA1 datasheet, TLD5190QVXUMA1 pinout, TLD5190QVXUMA1 application, or TLD5190QVXUMA1 equivalent, key selection considerations include H-bridge gate driver capability (R_DS(ON) = 2.3 Ω PU / 1.2 Ω PD), dual current/voltage regulation modes, spread-spectrum EMC optimization, and diagnostic flag outputs for open-load, overtemperature, and overvoltage faults.

Technical Context

The TLD5190QVXUMA1 implements a current-mode control architecture with dual feedback loops-FBH/FBL for LED current sensing and VFB for output voltage regulation-enabling seamless transition between buck, boost, and buck-boost operating modes. It integrates two independent high-side/low-side gate drivers per bridge leg, each supporting bootstrap-based high-side drive with dedicated BST1/BST2 pins and SWN1/SWN2 switch-node routing.

Its protection system includes hardware-based INOVLO and EN/INUVLO inputs for programmable input over/under-voltage lockout, thermal shutdown with autorestart, and real-time fault detection via EF1/EF2 open-drain flags. Monitoring is enabled through IINMON (20× VIN differential) and IOUTMON (200 mV + 8× FBH–FBL) analog monitor outputs, plus dedicated VREF (2.0 V) for analog dimming and temperature compensation.

Key Specifications

Pinout & Package

Package: PG-VQFN-48-31 (exposed thermal pad), thermally enhanced for automotive LED driver applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge LED driver controller applications.

Compared with LM34927QPWPRQ1 and MAX20051ATP/V+T, the TLD5190QVXUMA1 uniquely supports full H-bridge operation with independent high/low-side gate drivers, enabling true buck-boost LED regulation, matrix beam segmentation, and higher voltage/current scalability-critical for advanced automotive lighting.

Availability

TLD5190QVXUMA1 is available at Aetrix Electronics and suitable for automotive exterior lighting, commercial vehicle LED systems, and adaptive headlamp modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for TLD5190QVXUMA1 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 quality certification aligned to ISO/TS 16949.

The TLD5190 belongs to Infineon's LITIX™ Power family-designed specifically for high-efficiency, high-reliability LED driver applications in automotive lighting, emphasizing thermal robustness, diagnostic completeness, and EMC compliance.

FAQ

What is the function of the SPREAD_SPECTRUM pin?

The SPREAD_SPECTRUM pin enables or disables integrated frequency dithering to reduce electromagnetic interference peaks. When pulled high (via external resistor to VREF or IVCC), spread-spectrum modulation activates; when grounded, it disables. This feature improves CISPR-25 Class 5 EMC performance without external components.

Can TLD5190QVXUMA1 operate in standalone mode without a microcontroller?

Yes-it supports standalone operation using its internal oscillator (CLKOUT pin provides synchronized clock for other devices), analog dimming (SET pin), and hardware-configured protections (INOVLO, EN/INUVLO). No firmware or digital interface is required for basic current-regulated LED driving.

How does the IOUTMON output relate to LED current measurement?

IOUTMON delivers an analog voltage equal to 200 mV plus 8× the differential voltage across FBH–FBL. Since FBH–FBL is proportional to LED current via the external sense resistor, IOUTMON provides a scaled, temperature-stable monitor signal (e.g., 1.4 V at 150 mV FBH–FBL) usable for closed-loop feedback or system diagnostics.

What is the role of the IVCC_EXT pin, and when should it be used?

IVCC_EXT allows external supply of the internal gate drivers (bypassing the on-chip LDO). Use it when higher gate drive current or lower thermal stress is needed-e.g., with fast-switching, high-Qg MOSFETs. Connect to a clean 5 V external LDO; leave unconnected only if using the internal IVCC regulator (bypassed with ≥1 µF capacitor).