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

Infineon Technologies TDA16847-2

Name: TDA16847-2
Brand: Infineon Technologies
SKU: TDA16847-2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA16847-2

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

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

Datasheet:: TDA16847-2.pdf

Description:: IC POWER SUPPLY CONTROLLER 14DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,648

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Product details

Overview

TDA16847-2 from Infineon Technologies is a bipolar PWM quasi-resonant (QR) controller IC for flyback switch-mode power supplies with integrated Power Factor Correction (PFC) support, low-power standby operation, and temporary high-power circuit capability (via pin 8). It features adjustable standby frequency (e.g., 20 kHz), <100 µA start-up current, soft-start, VCC over/undervoltage lockout, and mains undervoltage shutdown. Used in TV, SAT receiver, and PC monitor SMPS designs.

For engineers reviewing the TDA16847-2 datasheet, TDA16847-2 pinout, TDA16847-2 application, or TDA16847-2 equivalent, key selection criteria include its pin-8 power measurement output, PFC-compatible control architecture, quasi-resonant zero-voltage switching enablement, and dual fault comparators for robust protection in consumer-grade offline converters.

Technical Context

The TDA16847-2 implements a quasi-resonant flyback controller with adaptive frequency reduction under light load to achieve low standby power, using an internal error amplifier or optocoupler feedback path. Its regulation loop integrates primary-side voltage sensing (pin 11), zero-crossing detection (pin 3), and primary current simulation (pin 2) for accurate power limiting and fold-back correction.

It supports three operating modes: free-running QR, fixed-frequency, and synchronized - with dedicated circuits for transformer saturation prevention during startup (pin 7 SYN), ringing suppression timing (pin 1 OTC), and noise-immune primary voltage check (pin 11 PVC) via spike blanking. Pin 8 provides a dedicated power measurement output unique to the -2 variant.

Key Specifications

Parameter	Value and Actual Design Meaning
Start-up current	<100 µA - enables direct startup from high-impedance auxiliary winding without external resistor
Standby frequency	Adjustable down to ~20 kHz - reduces audible noise and core losses in no-load/low-load conditions
VCC UVLO threshold	VOFF = 9.5 V, VON = 11.5 V - ensures reliable restart after brownout and prevents erratic operation
OCI input range	0–5 V with extended 0 V lower limit - eliminates need for series resistor to ground in optocoupler interface
Output driver	Push-pull, 13-pin source/sink - directly drives MOSFET gate with sufficient peak current for fast switching
Primary voltage check	1 V threshold at pin 11 - triggers shutdown if bulk capacitor voltage drops below safe operating level
Power measurement output	Pin 8 (PMO) - provides analog signal proportional to instantaneous output power for temporary high-power burst control

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1 OTC	Ringing suppression & standby frequency control	RC network sets delay before next switching cycle and determines minimum operating frequency
2 PCS	Primary current simulation input	Resistor-capacitor network quantifies max. deliverable output power for fold-back limiting
3 RZI	Regulation and zero-crossing input	Accepts control winding signal; >5 V pulses reduce control voltage at pin 4 to regulate output
4 SRC	Soft-start and regulation capacitor node	Capacitor value sets soft-start duration and loop response speed for primary-side regulation
5 OCI	Optocoupler feedback input	0–5 V compatible interface; replaces internal error amplifier when external isolation is required
6 FC2	Fault comparator 2 input	Voltage >1.2 V disables switching - used with pin 9 reference to enable overcurrent or thermal shutdown
7 SYN	Synchronization/fixed-frequency mode control	RC network sets fixed frequency; external pulses enable sync to system clock or other controllers
8 PMO	Power measurement output	Analog output proportional to instantaneous power - enables temporary high-power mode (TDA16847-2 only)
9 REF	5 V reference and FC2 enable	Provides stable 5 V reference; resistor to ground activates fault comparator 2
10 FC1	Fault comparator 1 input	Voltage >1 V forces immediate shutdown - used for overvoltage or secondary-side fault detection
11 PVC	Primary voltage check input	Detects bulk capacitor voltage via divider; <1 V triggers mains undervoltage shutdown
12 GND	Signal and power ground	Common return for all analog and digital functions; requires low-impedance PCB layout
13 OUT	Gate drive output	Push-pull driver capable of sourcing/sinking sufficient current to rapidly charge/discharge MOSFET gate
14 VCC	Supply voltage input	Powered initially by startup capacitor (C14); sustained by auxiliary winding after startup

Key Features

Feature	Design Value
Temporary High Power Circuit (THPC)	Pin 8 PMO output enables time-limited power boost for transient load demands (e.g., CRT deflection surge)
Mains voltage-dependent fold-back	Automatic adjustment of current limit threshold based on bulk voltage - maintains consistent power delivery across line variations
Noise-immune primary voltage check	Spike blanking on pin 11 prevents false shutdown during switching transients on bulk capacitor rail
Zero-voltage switching enablement	Internal circuitry ensures MOSFET turn-on occurs at valley of drain voltage waveform - minimizing switching loss
Transformer saturation prevention	Startup sequence forces freerunning mode until RZI signal exceeds 2.5 V - avoids core saturation in fixed-frequency applications

Applications

TV Power Supplies

SAT Receiver SMPS

Use Scenario: Offline flyback converter powering CRT or LCD TV mainboard and audio stages with dynamic load steps.

IC Role / Device Role / Timing Role: Quasi-resonant PWM controller managing primary-side regulation, PFC pre-regulation interface, and standby frequency scaling.

Use Value: Enables <1 W standby consumption via adaptive frequency reduction and supports THPC for horizontal deflection surges.

Use Scenario: Compact, low-noise SMPS supplying LNB bias, tuner, and demodulator circuits in satellite receivers.

IC Role / Device Role / Timing Role: Primary-side regulated QR controller with optocoupler feedback path and mains undervoltage protection.

Use Value: Ensures reliable cold-start under low-line conditions and suppresses audible transformer whine via adjustable 20 kHz minimum frequency.

PC Monitor Converters

VCR Power Systems

Use Scenario: Multi-output flyback supplying logic, video amplifiers, and deflection circuits with tight cross-regulation requirements.

IC Role / Device Role / Timing Role: Dual-fault protected PWM controller with internal error amp and external optocoupler option for isolated feedback.

Use Value: Delivers stable outputs across line/load variations using primary-side sensing and pin-11 PVC-based brownout recovery.

Use Scenario: Mains-powered tape deck with motor drive, audio processing, and display backlight requiring low idle power.

IC Role / Device Role / Timing Role: Standby-optimized QR controller implementing soft-start, ringing suppression, and temporary high-power burst for tape loading.

Use Value: Reduces no-load dissipation via <100 µA start-up current and uses pin-8 PMO to trigger brief 30% power boost during mechanical engagement.

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
TDA16846-2	No pin-8 PMO output; lacks Temporary High Power Circuit functionality	Used where burst-mode power delivery is unnecessary; identical pinout and control architecture otherwise	Select when THPC is not required and cost optimization is prioritized
ICE2A265	Integrated 650 V MOSFET; higher integration but fixed 65 kHz frequency; no adaptive standby frequency	Targeted at simpler, lower-cost SMPS without PFC or ultra-low standby needs	Choose for space-constrained designs where discrete MOSFET drive is undesirable and variable frequency is not needed

Compared with TDA16846-2, the TDA16847-2 adds critical burst-power capability via PMO, while ICE2A265 trades flexibility for integration - making TDA16847-2 optimal for consumer electronics demanding both efficiency and transient headroom.

Availability

TDA16847-2 is available at Aetrix Electronics and suitable for TV power supplies, SAT receiver SMPS, and PC monitor converters requiring stable component supply, long-term lifecycle support, and legacy design continuity.

Supply support for TDA16847-2 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 (CECC-approved).

The TDA16847-2 belongs to Infineon's legacy bipolar SMPS controller product line, designed specifically for cost-sensitive, high-reliability offline flyback converters in consumer electronics with stringent standby power and EMI requirements.

FAQ

What is the function of pin 8 on the TDA16847-2?

Pin 8 is the Power Measurement Output (PMO), unique to the TDA16847-2 variant. It delivers an analog voltage proportional to instantaneous output power, enabling implementation of a Temporary High Power Circuit for short-duration load surges such as CRT deflection or motor startup. This pin is not connected (N.C.) on the TDA16846-2.

How does the TDA16847-2 achieve low standby power?

The TDA16847-2 reduces switching frequency in small, load-dependent steps down to an adjustable minimum (e.g., 20 kHz), lowering core and switching losses at light loads. Combined with <100 µA start-up current and optimized internal biasing, this enables sub-1 W standby consumption in compliant consumer power supplies.

Can the TDA16847-2 operate without an optocoupler?

Yes - the TDA16847-2 supports primary-side regulation using its internal error amplifier and pin 3 (RZI) for feedback from the transformer control winding. An optocoupler is optional and connected to pin 5 (OCI) only when secondary-side regulation or enhanced isolation is required.

What protection features are built into the TDA16847-2?

The TDA16847-2 integrates VCC over/undervoltage lockout, mains undervoltage shutdown (via pin 11), two independent fault comparators (pins 6 and 10), primary voltage-dependent fold-back, and soft-start. All protections are implemented with internal thresholds and require no external components beyond basic RC networks.

TDA16847-2 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

TDA16847-2 FAQ

1.How can I place an order for TDA16847-2 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA16847-2 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 TDA16847-2 reliable?

The price and inventory of TDA16847-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA16847-2 is usually 5 days.

3.What payment methods are accepted for TDA16847-2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA16847-2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA16847-2?

TDA16847-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA16847-2 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 TDA16847-2?

For technical support, including TDA16847-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA16847-2 requirements.

6.How does Aetrix verify that TDA16847-2 is sourced from the original manufacturer or authorized distributors?

All TDA16847-2 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 TDA16847-2 meets industry standards.

7.What is the process for return or replacement of TDA16847-2?

All TDA16847-2 units undergo pre-shipment inspection (PSI). If there is an issue with TDA16847-2, 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 TDA16847-2 part is unused and in its original packaging.

Return procedure for TDA16847-2:

1.Submit a request within 90 days.

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

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