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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Supply Controllers, Monitors

Infineon Technologies TDA46053HKLA1

Name: TDA46053HKLA1
Brand: Infineon Technologies
SKU: TDA46053HKLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA46053HKLA1

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: TDA46053HKLA1.pdf

Description:: IC POWER SUPPLY CONTROLLER 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,459

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Product details

Overview

TDA46053HKLA1 from Infineon Technologies is a bipolar PWM quasi-resonant (QR) controller IC for flyback SMPS using external MOSFETs. It performs primary-side regulation, fold-back overcurrent protection, line-voltage-dependent overload compensation, undervoltage lockout, and soft-start in AC/DC adapters and video recorder power supplies delivering up to 70 W across 180–264 V_AC input.

For engineers reviewing the TDA46053HKLA1 datasheet, TDA46053HKLA1 pinout, TDA46053HKLA1 application, or TDA46053HKLA1 equivalent, key selection criteria include its P-DIP-8-1 package, ±1 A push-pull gate driver (Pin 5), zero-crossing triggered oscillation (Pin 8), internal reference derivation from V_CC (Pin 6), and integrated ringing suppression - all critical for noise-sensitive consumer flyback designs.

Technical Context

The TDA46053HKLA1 implements quasi-resonant operation by detecting transformer demagnetization via zero-crossing feedback at Pin 8, enabling valley-switching to reduce EMI and switching losses. Its control loop combines primary current sensing (Pin 2, RC-simulated sawtooth), regulation winding feedback (Pin 1), and line voltage monitoring (Pin 3) to dynamically adjust on-time and fold-back threshold.

It integrates undervoltage lockout (V_3L = 1.7 V threshold at Pin 3), thermal shutdown, AGC-based light-load voltage reduction, and burst-mode operation (20–40 kHz) at no load - ensuring stable regulation across wide input and load ranges without secondary-side optocoupler dependency.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology Support	Flyback with quasi-resonant (valley-switching) operation enabled by zero-cross detection
Gate Drive Output	±1 A push-pull output at Pin 5 for fast MOSFET gate charge/discharge
Start-up Supply	V_CC derived internally from Pin 6; logic enabled only when 10.5 V < V₆ < 25 V
Overload Protection	Fold-back current limiting with line-voltage-dependent threshold adjustment via Pin 3
Soft-Start	Capacitor-connected Pin 7 initiates short-pulse startup to avoid audible transformer noise
No-Load Behavior	Burst-mode operation at 20–40 kHz; eliminates standby power waste without auxiliary winding
Ringing Suppression	On-chip circuit suppresses parasitic transformer oscillations detected at Pin 8

Pinout & Package

Package: P-DIP-8-1 (Plastic Dual In-line Package, 8-pin, 0.3 inch body width, standard lead pitch).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Regulation Feedback Input	Compares rectified control-winding voltage against internal 2.5 V reference to adjust pulse width
Pin 2	Primary Current Sense Input	Accepts RC-simulated voltage ramp proportional to MOSFET drain current for peak-current limiting
Pin 3	Line Voltage Monitor Input	Detects undervoltage (V<1.7 V) and scales fold-back point based on AC input level
Pin 4	Ground Reference	Common return for internal analog and logic circuits; requires low-impedance PCB connection
Pin 5	Gate Driver Output	±1 A push-pull stage directly drives MOSFET gate; supports BUZ90-class devices
Pin 6	V_CC Supply Input	Derives all internal references (V_REF, V_ST, V_2B) and enables logic only within 10.5–25 V window
Pin 7	Soft-Start Control	Capacitor-to-ground sets initial pulse width ramp; reduces inrush and acoustic noise
Pin 8	Oscillation Feedback Input	Detects transformer demagnetization zero-crossing (−50 mV threshold) to trigger next switching cycle

Key Features

Feature	Design Value
Fold-back Overcurrent Protection	Reduces peak primary current under overload while scaling threshold with line voltage to maintain consistent power limit
Burst-Mode No-Load Operation	Switches at 20–40 kHz during light/no load to minimize standby power without auxiliary bias winding
Integrated Ringing Suppression	Actively damps transformer parasitic oscillations sensed at Pin 8, eliminating need for external snubbers
Line-Compensated Fold-back	Adjusts current-limit threshold via Pin 3 to prevent over-power at high line, improving safety margin
Thermal Shutdown	Halts switching if die temperature exceeds safe operating limit, protecting MOSFET and transformer

Applications

Video Recorder Power Supply

AC/DC Adapter for Consumer Electronics

Use Scenario: 70 W wide-range (180–264 V_AC) flyback supply powering multi-rail video recorder systems.

IC Role / Device Role / Timing Role: Primary-side QR controller performing valley-switching, regulation, and protection without optocoupler.

Use Value: Enables compact, low-EMI design meeting CE conducted emission limits due to zero-voltage switching and on-chip ringing suppression.

Use Scenario: Universal-input offline adapter for set-top boxes and DVD players requiring low standby power and quiet startup.

IC Role / Device Role / Timing Role: Burst-mode PWM controller managing MOSFET gate drive, soft-start, and line-compensated overload protection.

Use Value: Achieves <300 mW no-load consumption and eliminates audible transformer whine via capacitor-controlled soft-start (Pin 7).

Industrial Flyback PSU

Replacement Power Module for Legacy Equipment

Use Scenario: 40–60 W industrial control power supply operating continuously under variable line and load conditions.

IC Role / Device Role / Timing Role: Quasi-resonant controller implementing undervoltage lockout (Pin 3), thermal shutdown, and primary-side regulation.

Use Value: Ensures reliable restart after brownouts and prevents MOSFET failure during sustained overloads via fold-back + line compensation.

Use Scenario: Drop-in replacement for aging TDA4605-2/-3-based power modules in discontinued test equipment.

IC Role / Device Role / Timing Role: Pin-compatible bipolar PWM controller supporting identical P-DIP-8 layout and external component values.

Use Value: Maintains original performance (70 W output, 20–40 kHz burst mode) while offering improved thermal robustness and reduced EMI.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quasi-resonant flyback controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE2A265	CMOS-based QR controller with higher integration (built-in HV start-up, no external V_CC resistor needed); lacks Pin 7 soft-start control	Requires redesign of start-up network and gate drive timing; better suited for new designs targeting lower BOM count	Select ICE2A265 only when replacing entire control section and accepting loss of adjustable soft-start ramp
UC3842BD1G	Fixed-frequency current-mode PWM controller; no QR capability, no zero-cross detection, no burst mode	Cannot achieve same efficiency or EMI performance in flyback; requires optocoupler feedback and external slope compensation	Choose UC3842BD1G only for cost-sensitive non-CE-compliant designs where QR benefits are not required

Compared with ICE2A265 and UC3842BD1G, the TDA46053HKLA1 uniquely delivers valley-switching, burst-mode no-load operation, and line-compensated fold-back in a single bipolar IC - making it optimal for legacy-replacement and noise-critical consumer flyback PSUs where P-DIP-8 compatibility and proven reliability are essential.

Availability

TDA46053HKLA1 is available at Aetrix Electronics and suitable for video recorder power supplies, universal AC/DC adapters, industrial flyback PSUs, and legacy equipment replacement modules requiring stable component supply and long-term obsolescence support.

Supply support for TDA46053HKLA1 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 TDA46053HKLA1 belongs to Infineon's legacy bipolar PWM controller product line, designed specifically for cost-effective, robust quasi-resonant flyback converters in consumer and industrial offline power supplies.

FAQ

What is the function of Pin 8 in the TDA46053HKLA1?

Pin 8 is the oscillation feedback input that detects transformer demagnetization zero-crossings. Each falling-edge zero crossing triggers a new output pulse at Pin 5, enabling valley-switching operation. Its typical trigger threshold is −50 mV, and the IC ignores spurious crossings occurring shortly after MOSFET turn-off to reject ringing artifacts.

Does the TDA46053HKLA1 require an external optocoupler for regulation?

No. The TDA46053HKLA1 uses primary-side regulation via the control winding (n1) connected to Pin 1, eliminating the need for an optocoupler. Regulation accuracy depends on transformer turns ratio and external resistor divider (R5–R7), achieving ±5% typical output voltage tolerance without secondary feedback components.

How does the soft-start function work on the TDA46053HKLA1?

Soft-start is implemented by connecting a capacitor from Pin 7 to ground. During startup, this capacitor charges slowly, reducing the maximum output pulse width at Pin 5. This limits inrush current and keeps switching frequency outside the audible range (typically >20 kHz), preventing transformer whine during power-up.

What is the purpose of the RC network connected to Pin 2?

The RC network at Pin 2 simulates the primary current ramp using a voltage rise proportional to MOSFET drain current. It sets the peak current limit and defines the overload point. The time constant must be chosen to avoid core saturation - typically matched to the primary inductance and input voltage to ensure accurate current sensing without delay.

TDA46053HKLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: Power Supply Controller

Voltage - Input:: -

Voltage - Supply:: 7.5V ~ 15.5V

Current - Supply:: 11 mA

Operating Temperature:: -20°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-DIP-8

TDA46053HKLA1 FAQ

1.How can I place an order for TDA46053HKLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA46053HKLA1 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 TDA46053HKLA1 reliable?

The price and inventory of TDA46053HKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA46053HKLA1 is usually 5 days.

3.What payment methods are accepted for TDA46053HKLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA46053HKLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA46053HKLA1?

TDA46053HKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA46053HKLA1 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 TDA46053HKLA1?

For technical support, including TDA46053HKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA46053HKLA1 requirements.

6.How does Aetrix verify that TDA46053HKLA1 is sourced from the original manufacturer or authorized distributors?

All TDA46053HKLA1 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 TDA46053HKLA1 meets industry standards.

7.What is the process for return or replacement of TDA46053HKLA1?

All TDA46053HKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA46053HKLA1, 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 TDA46053HKLA1 part is unused and in its original packaging.

Return procedure for TDA46053HKLA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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