Infineon Technologies TDA4916GGHUMA1

Overview

TDA4916GGHUMA1 from Infineon Technologies is a PWM controller IC with integrated SIPMOS MOSFET driver output, designed for single-ended flyback, forward, and choke-switching power supplies. It features 150 kHz max switching frequency, ±1% reference voltage accuracy (VREF = 5.0 V), soft-start via CSS pin, and built-in overvoltage (K3), undervoltage (K4), and overcurrent (K5/K6) protection - deployed in industrial AC/DC adapters and offline SMPS.

For engineers reviewing the TDA4916GGHUMA1 datasheet, TDA4916GGHUMA1 pinout, TDA4916GGHUMA1 application, or TDA4916GGHUMA1 equivalent, key selection criteria include its dual-mode (voltage/current) control architecture, antiphase synchronization capability (QSYN/ISYN), ramp generator (CR pin) programmability, and direct SIPMOS gate drive (QSIP pin) without external buffer.

Technical Context

The TDA4916GGHUMA1 implements voltage-mode and current-mode PWM control using an internally calibrated 5.0 V reference and a programmable ramp generator (CR pin). Its duty cycle is set either by comparator K1 (voltage mode) comparing the ramp to an external DC level, or by K5 (current mode) comparing sensed source current against a threshold.

Synchronization is supported via ISYN input and QSYN output for antiphase or in-phase operation of multiple units. Fault handling uses a dedicated fault flip-flop that inhibits QSIP output on K3/K4/K5/K6 triggers and requires soft-start recovery (CSS) after fault clearance.

Key Specifications

Pinout & Package

P-DSO-24-1 surface-mount package: 24-pin plastic dual small-outline, 300 mil body width, 1.27 mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PWM controller with integrated MOSFET driver applications.

Compared with UC3844BD1G and TL494CN, the TDA4916GGHUMA1 uniquely integrates SIPMOS gate drive, ±1% VREF, programmable ramp slope (CR), and antiphase sync - making it optimal for compact, high-accuracy single-ended SMPS where board space and component count are constrained.

Availability

TDA4916GGHUMA1 is available at Aetrix Electronics and suitable for industrial AC/DC adapters, telecom choke converters, variable-speed motor auxiliary supplies, and PLC power modules requiring stable component supply and long-term obsolescence management.

Supply support for TDA4916GGHUMA1 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, and industrial control ICs, with global R&D and manufacturing infrastructure.

The TDA4916GGHUMA1 belongs to Infineon's legacy SMPS controller product line, engineered specifically for high-efficiency, low-component-count offline switch-mode power supplies using SIPMOS transistors.

FAQ

What is the maximum recommended gate capacitance for the QSIP output?

The QSIP pin is rated for direct drive of SIPMOS transistors with total gate charge ≤ 45 nC. For devices exceeding this (e.g., >200 V/5 A SIPMOS), a series gate resistor of 5–10 Ω is recommended to limit peak current and prevent ringing. Drive capability is verified up to 1.2 A sink/source with <100 ns rise/fall times into 1 nF load.

Can the TDA4916GGHUMA1 operate in discontinuous conduction mode (DCM)?

Yes - DCM operation is supported via current-mode control (K5 sensing) and adjustable ramp slope (CR pin). When the sensed current falls to zero before the next switching cycle, the device naturally enters DCM. The PO (pulse omission) pin can be used to force skip-cycle mode under light loads for improved efficiency.

How is the soft-start time calculated from the CSS capacitor value?

Soft-start time (t_SS) ≈ 1.2 × C_CSS × 10⁶ seconds, where C_CSS is in farads. For example, a 100 nF capacitor yields ~120 ms soft-start. This linear ramp charges the internal soft-start capacitor and limits initial duty cycle growth until full regulation is established.

Does the VREF pin support external loading, and what is its maximum sink current?

VREF provides a regulated 5.0 V ±1% output capable of sourcing up to 1 mA continuously. It is intended for biasing feedback dividers and comparator references. Loading beyond 1 mA causes output droop (>2% deviation); for higher current needs, a dedicated LDO or buffer amplifier is required.