Infineon Technologies TDA4862

Overview

TDA 4862 from Infineon Technologies is a bipolar power-factor controller IC designed for active harmonic filtering in boost-mode preconverters. It delivers near-unity power factor (≈1), supports discontinuous conduction mode (DCM) operation via zero-current detection, and integrates a ±1.4% trimmed reference, totem-pole gate driver, and undervoltage lockout with hysteresis-enabling stable 90–270 VAC input operation in electronic ballasts and SMPS.

For engineers reviewing the TDA 4862 datasheet, TDA 4862 pinout, TDA 4862 application, or TDA 4862 equivalent, this device is selected for high-accuracy output voltage regulation (integrator-based feedback), fast overvoltage protection during load transients, and direct MOSFET drive without external buffers-critical for IEC 555-compliant lighting and industrial power supplies.

Technical Context

The TDA 4862 implements a one-quadrant analog multiplier with linear input ranges of 0–4.0 V (MULTIN) and 2.5–4.0 V (VAOUT), enabling instantaneous line-voltage-proportional current shaping. Its internal voltage amplifier features 0.8 MHz gain-bandwidth and 80° phase margin, with integrator-based loop compensation set below 20 Hz using external VSENSE–VAOUT capacitance.

Operation relies on zero-current detection (Schmitt-triggered, 0.6 V hysteresis) to initiate each switching cycle at inductor current zero-crossing, ensuring triangular current waveforms and eliminating dead-time gaps. The totem-pole GTDRV output includes 4 Ω series resistors per leg to suppress cross-conduction, and internal clamps protect DETIN (5 V), ISENSE (–0.3 V), and VAOUT (5 V).

Key Specifications

Pinout & Package

Package: PG-DIP-8-1 (dual in-line plastic, 8-pin, 0.3 inch width) and PG-DSO-8-1 (SOIC-8, 150 mil width). Both packages share identical pin mapping and thermal performance for through-hole or surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-factor controller applications.

Compared with UC3854BN and TDA4863, the TDA 4862 provides optimal balance of integration (no external op-amp/multiplier), DCM efficiency at medium power (30–300 W), and proven field reliability in ballast applications-making it preferred for cost-sensitive, high-volume lighting designs.

Availability

TDA 4862 is available at Aetrix Electronics and suitable for LED ballast preconverters, industrial SMPS input stages, compact fluorescent lamp drivers, and medical power supply inputs requiring stable component supply and long-term lifecycle support.

Supply support for TDA 4862 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 leadership in high-voltage analog and mixed-signal solutions.

The TDA 4862 belongs to Infineon's legacy bipolar PFC controller product line, engineered specifically for cost-effective, high-reliability active harmonic correction in lighting and mid-power AC/DC conversion.

FAQ

What is the recommended minimum VCC bypass capacitor for stable TDA 4862 operation?

A minimum 100 nF ceramic capacitor must be placed directly between VCC and GND, as specified in the datasheet. This capacitor absorbs gate-drive current spikes and prevents VCC droop during MOSFET turn-on. Larger values (e.g., 220 nF) improve immunity to line transients but do not replace the mandatory local placement requirement.

Can the TDA 4862 operate without an auxiliary winding on the boost inductor?

No-the DETIN pin requires a dedicated auxiliary winding to detect zero-current crossing for DCM operation. Omitting it disables zero-current detection, causing uncontrolled conduction and potential MOSFET failure. An external resistor must also be used in series with the winding to limit clamp current, per Figure 3 application circuit.

How does the internal overvoltage regulator respond during sudden load removal?

During rapid load removal, output voltage overshoot causes current to flow into the VAOUT pin through the external integrator capacitor. When this current exceeds an internal threshold, the regulator reduces the multiplier output voltage-immediately lowering gate drive duty cycle to clamp output voltage within safe limits before the slow integrator loop can react.

Is the TDA 4862 compatible with both PG-DIP-8-1 and PG-DSO-8-1 packages in the same PCB footprint?

No-PG-DIP-8-1 (through-hole) and PG-DSO-8-1 (surface-mount) have different pad layouts, lead pitches, and thermal vias. While pin functions match, mechanical mounting and solder reflow profiles differ. Separate footprints are required; however, schematic symbols and netlists remain identical across both variants.