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

Infineon Technologies TDA168462HKLA1

Name: TDA168462HKLA1
Brand: Infineon Technologies
SKU: TDA168462HKLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA168462HKLA1

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: TDA168462HKLA1.pdf

Description:: IC POWER SUPPLY CONTROLLER 14DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,730

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Product details

Overview

TDA168462HKLA1 from Infineon Technologies is a bipolar PWM quasi-resonant (QR) controller IC for flyback switch-mode power supplies with integrated PFC support, 14-pin DIP package, 5 V reference output (pin 9), 20 kHz adjustable standby frequency, and mains undervoltage protection - used in TV, SAT receiver, and PC monitor auxiliary power stages.

For engineers reviewing the TDA168462HKLA1 datasheet, TDA168462HKLA1 pinout, TDA168462HKLA1 application, or TDA168462HKLA1 equivalent, key selection criteria include its low-startup-current (<100 µA), VCC overvoltage lockout (17.1 V), soft-start capacitor control (pin 4), primary voltage check input (pin 11), and opto-coupler feedback compatibility (pin 5).

Technical Context

The TDA168462HKLA1 implements quasi-resonant switching with zero-voltage turn-on to minimize MOSFET stress and EMI, using regulation via RZI (pin 3) zero-crossing detection and internal error amplifier feedback. It supports both free-running and fixed-frequency operation via SYN (pin 7) with external RC timing or sync pulses.

Its protection architecture includes dual fault comparators (pins 6 and 10), primary voltage check (pin 11) with fold-back correction, VCC over/undervoltage lockout (pin 14), and mains undervoltage shutdown - all implemented in bipolar process without external latches or timers.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	VCC = 10.5–18.5 V; enables operation across wide auxiliary winding voltage swings
Startup Current	<100 µA; allows direct startup from high-impedance bias networks without dedicated start resistor
Reference Output	5 V ±2% at pin 9; powers external circuitry and enables FC2 via series resistor
Standby Frequency	Adjustable down to 20 kHz via OTC pin (1); reduces audible noise and core loss in light-load conditions
VCC Overvoltage Threshold	17.1 V max; triggers immediate shutdown to protect internal circuitry during transient surges
Primary Voltage Check Threshold	1.0 V min at pin 11; disables SMPS if bulk capacitor voltage drops below safe operating level
Opto Input Threshold	Active low; pin 5 sinks current when opto output conducts, enabling closed-loop regulation

Pinout & Package

Package: P-DIP-14-3 (14-pin plastic dual in-line, 0.3 inch width, standard through-hole mounting).

Pin/Terminal	Circuit Role	Design Meaning
1 OTC	Ringing suppression & standby frequency control	RC network sets QR timing margin and minimum operating frequency; critical for EMI reduction
2 PCS	Primary current simulation input	Resistor-capacitor network emulates peak primary current for power limiting
3 RZI	Regulation and zero-crossing input	Accepts control winding signal; >5 V pulses reduce pin 4 control voltage for load-dependent frequency scaling
4 SRC	Soft-start and regulation capacitor node	Capacitor value sets soft-start duration and loop response speed; direct control of PWM duty
5 OCI	Opto-coupler feedback input	Sinks current when opto conducts; enables isolated secondary-side voltage regulation
6 FC2	Fault comparator 2 input	Voltage >1.2 V disables output; enabled by resistor to pin 9 (5 V ref)
7 SYN	Synchronization/fixed-frequency input	RC network sets fixed frequency; external pulses enable synchronized multi-phase operation
8 N.C.	No connection	Not bonded internally; must remain unconnected (TDA16846-2 variant)
9 REF	5 V reference output	Stable 5 V supply for external bias and FC2 enable resistor; ±2% accuracy
10 FC1	Fault comparator 1 input	Voltage >1 V forces immediate shutdown; used for overcurrent or thermal fault signaling
11 PVC	Primary voltage check input	Monitors bulk capacitor via divider; <1 V triggers undervoltage lockout and fold-back correction
12 GND	Analog and power ground	Common return for all analog circuits and driver stage; requires low-impedance PCB layout
13 OUT	Gate drive output	Push-pull driver capable of sinking/source up to 200 mA; directly drives MOSFET gate with fast edges
14 VCC	Supply voltage input	Starts from 10.5 V; powered initially by PCS network, then by auxiliary winding via external diode

Key Features

Feature	Design Value
Quasi-resonant zero-voltage switching	Reduces MOSFET switching losses and EMI by ensuring turn-on only at valley points of drain voltage
Load-dependent frequency scaling	Progressively lowers switching frequency under light load to maintain efficiency down to standby (20 kHz)
Dual independent fault comparators	Pins 6 and 10 provide configurable, latch-free shutdown paths for overcurrent, overvoltage, and thermal faults
Mains undervoltage protection	Pin 11 detects bulk capacitor collapse and disables SMPS before transformer saturation or output droop occurs
Integrated 5 V reference	Stable, temperature-compensated 5 V output powers external circuitry and enables precise fault comparator thresholds

Applications

TV Power Supply

SAT Receiver Auxiliary PSU

Use Scenario: Standby and main power conversion in CRT/LCD TV sets requiring low no-load consumption and EMI compliance.

IC Role / Device Role / Timing Role: Primary-side QR PWM controller managing flyback topology with PFC pre-regulator and adaptive frequency scaling.

Use Value: Achieves <0.3 W no-load power via 20 kHz standby frequency and <100 µA startup current, meeting EU ErP Tier 2.

Use Scenario: Dual-output (5 V/12 V) auxiliary supply for digital satellite receivers with remote wake-up capability.

IC Role / Device Role / Timing Role: Regulates isolated flyback converter with opto-coupler feedback (pin 5) and primary-side sensing (pins 3, 11).

Use Value: Enables reliable cold-start from 90–264 VAC mains and maintains regulation during brownouts via PVC input (pin 11).

PC Monitor SMPS

VCR Tape Deck Power

Use Scenario: Compact, low-noise auxiliary power for LCD monitor logic boards requiring stable 3.3 V/5 V rails.

IC Role / Device Role / Timing Role: Controls QR flyback with soft-start (pin 4) and zero-crossing regulation (pin 3) to suppress audible transformer whine.

Use Value: Adjustable ringing suppression (pin 1) eliminates high-frequency oscillation in ferrite transformers at light loads.

Use Scenario: Mains-powered tape deck with motor drive and logic supply needing robust undervoltage recovery.

IC Role / Device Role / Timing Role: Manages flyback converter with mains undervoltage lockout (pin 11) and temporary high-power burst capability (not used in -2 variant).

Use Value: Prevents transformer saturation during startup via SYN-initiated freerunning mode until RZI threshold (2.5 V) is reached.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE2A280ZXKLA1	Fixed 65 kHz frequency; no standby frequency scaling; higher startup current (250 µA)	Lacks adaptive light-load frequency reduction; suited for constant-frequency designs only	Select when fixed-frequency operation and higher power density outweigh standby efficiency needs
KA5Q1265RTU	Integrated MOSFET; no external gate drive; no PFC support; single fault comparator	Self-contained solution for low-cost AC/DC adapters; not suitable for PFC-enabled or high-reliability systems	Choose for cost-sensitive, low-power (<15 W) applications where integration reduces BOM count

Compared with ICE2A280ZXKLA1 and KA5Q1265RTU, TDA168462HKLA1 uniquely delivers quasi-resonant operation with load-adaptive frequency scaling, dual fault comparators, and PFC compatibility - making it optimal for consumer electronics requiring sub-0.5 W standby and EMI-constrained layouts.

Availability

TDA168462HKLA1 is available at Aetrix Electronics and suitable for TV power supplies, SAT receiver auxiliary PSUs, and PC monitor SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.

Supply support for TDA168462HKLA1 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 manufacturing and quality certification to ISO 9001 and IATF 16949.

The TDA16846 product line targets energy-efficient AC/DC conversion in consumer electronics, emphasizing low standby power, quasi-resonant control, and robust protection for flyback topologies operating across universal mains input.

FAQ

What is the function of Pin 1 (OTC) in TDA168462HKLA1?

Pin 1 (OTC) sets the ringing suppression time and standby frequency via an external RC network. Its time constant determines the minimum operating frequency (e.g., 20 kHz) and controls the delay between MOSFET turn-off and next turn-on to avoid hard-switching during transformer ring-down. This directly impacts EMI performance and light-load efficiency.

How does the primary voltage check (PVC) on Pin 11 operate?

Pin 11 monitors the rectified mains voltage via a resistive divider. When the divided voltage falls below 1.0 V, the IC disables switching to prevent transformer saturation and output collapse during brownouts. In free-running mode, it also adjusts the fold-back point to maintain regulation stability as input voltage decreases.

Can TDA168462HKLA1 be used with opto-coupler feedback?

Yes - pin 5 (OCI) is designed for opto-coupler feedback. The phototransistor collector connects to pin 5, emitter to ground. When conducting, it pulls pin 5 low to reduce duty cycle. The RZI input (pin 3) must be biased below 5 V in this configuration to avoid interference with regulation.

What is the purpose of the 5 V reference on Pin 9?

Pin 9 provides a precision 5 V ±2% reference for biasing external circuitry and enabling fault comparator 2 (pin 6). A resistor from pin 9 to pin 6 sets the FC2 threshold; typical values yield 1.2 V trip point. This eliminates need for external voltage references in protection circuits.

TDA168462HKLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: Power Supply Controller

Voltage - Input:: -

Voltage - Supply:: 8V ~ 16V

Current - Supply:: 5 mA

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-DIP-14-3

TDA168462HKLA1 FAQ

1.How can I place an order for TDA168462HKLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA168462HKLA1 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 TDA168462HKLA1 reliable?

The price and inventory of TDA168462HKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA168462HKLA1 is usually 5 days.

3.What payment methods are accepted for TDA168462HKLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA168462HKLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA168462HKLA1?

TDA168462HKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA168462HKLA1 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 TDA168462HKLA1?

For technical support, including TDA168462HKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA168462HKLA1 requirements.

6.How does Aetrix verify that TDA168462HKLA1 is sourced from the original manufacturer or authorized distributors?

All TDA168462HKLA1 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 TDA168462HKLA1 meets industry standards.

7.What is the process for return or replacement of TDA168462HKLA1?

All TDA168462HKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA168462HKLA1, 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 TDA168462HKLA1 part is unused and in its original packaging.

Return procedure for TDA168462HKLA1:

1.Submit a request within 90 days.

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

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