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

Infineon Technologies TDA16847

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

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Part No.:: TDA16847

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

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

Datasheet:: TDA16847.pdf

Description:: IC POWER SUPPLY CONTROLLER 14DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,525

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Product details

Overview

TDA16847 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-startup-current operation (≤100 µA), adjustable standby frequency (e.g., 20 kHz), and dedicated temporary high-power circuit output on Pin 8. It targets consumer electronics SMPS designs requiring stable light-load efficiency, mains undervoltage protection, and soft-start functionality.

For engineers reviewing the TDA16847 datasheet, TDA16847 pinout, TDA16847 application, or TDA16847 equivalent, key selection criteria include its P-DIP-14-3 package compatibility, VCC overvoltage lockout at 17.1 V, primary voltage check input (Pin 11), optocoupler feedback interface (Pin 5), and dual fault comparators (Pins 6 & 10) enabling robust system-level protection in TV, SAT receiver, and PC monitor power supplies.

Technical Context

The TDA16847 implements a quasi-resonant flyback control architecture with adaptive frequency reduction under decreasing load, zero-voltage switching (ZVS) enforcement via RZI input (Pin 3), and mains-synchronized or free-running operation selectable via SYN (Pin 7). Its internal error amplifier supports both direct regulation and optocoupler-coupled feedback paths.

It integrates dedicated protection circuits: VCC over/undervoltage lockout (17.1 V / 9.5 V thresholds), primary voltage check (Pin 11, trip at <1 V), two independent fault comparators (Pins 6 & 10, trip at >1.2 V and >1 V respectively), and ringing suppression timing controlled by OTC (Pin 1). The PMO output (Pin 8) provides real-time power measurement for temporary high-power burst handling.

Key Specifications

Parameter	Value and Actual Design Meaning
Startup Current	≤100 µA - enables direct startup from high-impedance auxiliary winding without external resistor
VCC Overvoltage Threshold	17.1 V - triggers immediate shutdown to protect internal circuitry during supply transients
Standby Frequency	Adjustable down to ~20 kHz - reduces audible noise and core losses in no-load/low-load conditions
Primary Voltage Check Trip	<1 V at Pin 11 - disables SMPS during brownout to prevent transformer saturation and MOSFET overstress
Fault Comparator 1 Threshold	>1 V at Pin 10 - provides fast shutdown path for overcurrent or thermal fault signals
Soft-Start Capacitor Pin	Pin 4 - capacitor value sets soft-start duration and regulation loop bandwidth
Power Measurement Output	Pin 8 (PMO) - analog output proportional to instantaneous primary power for burst-mode control

Pinout & Package

Package: P-DIP-14-3 (Plastic Dual In-line Package, 14-pin, 3.9 mm pitch, through-hole mount).

Pin/Terminal	Circuit Role	Design Meaning
1 OTC	Ringing suppression timer	RC network sets standby frequency and ringing blanking time
2 PCS	Primary current simulation	Capacitor + resistor network estimates max output power capability
3 RZI	Regulation & zero-crossing input	Accepts control winding signal; >5 V pulses reduce control voltage (Pin 4)
4 SRC	Soft-start & regulation capacitor	Capacitor value defines soft-start ramp time and loop stability
5 OCI	Optocoupler input	Direct interface to optocoupler output for isolated feedback
6 FC2	Fault comparator 2	Input threshold >1.2 V disables SMPS; enabled via REF (Pin 9) resistor
7 SYN	Synchronization input	Accepts external sync pulses or RC network for fixed-frequency mode
8 PMO	Power measurement output	Analog output proportional to primary power; unique to TDA16847 variants
9 REF	Reference voltage source	5 V output; resistor to GND enables FC2 (Pin 6)
10 FC1	Fault comparator 1	Input threshold >1 V triggers immediate shutdown
11 PVC	Primary voltage check	Monitors rectified mains via divider; <1 V disables SMPS during brownout
12 GND	Ground reference	Common return for all analog and power sections
13 OUT	Gate driver output	Push-pull output drives external MOSFET gate via series resistor
14 VCC	Supply voltage input	Startup and operating supply; internal diode allows self-biasing from auxiliary winding

Key Features

Feature	Design Value
Quasi-resonant flyback control	Enables ZVS operation to reduce switching losses and EMI in 50–200 W consumer SMPS
Adjustable standby frequency	Configurable down to ~20 kHz via OTC (Pin 1) RC network to eliminate audible noise
Temporary High Power Circuit (PMO)	Pin 8 analog output enables burst-mode power delivery for transient load demands
Mains-dependent fold-back correction	Automatically adjusts current limit based on input voltage to maintain consistent power delivery
Two independent fault comparators	Pins 6 and 10 provide redundant, externally configurable shutdown paths for safety-critical designs

Applications

TV Power Supplies

SAT Receiver SMPS

Use Scenario: Standby-to-active transition in CRT and early flat-panel TVs requiring <1 W no-load consumption.

IC Role / Device Role / Timing Role: Primary PWM controller managing quasi-resonant flyback topology with adaptive frequency scaling and PFC support.

Use Value: Achieves ≤100 µA startup current and 20 kHz standby frequency to meet EU Energy Star requirements.

Use Scenario: Mains-powered satellite receiver with variable load profiles and need for reliable brownout recovery.

IC Role / Device Role / Timing Role: Regulator and protector with PVC (Pin 11) monitoring and dual fault comparators for field-deployed reliability.

Use Value: Prevents transformer saturation during low-line conditions using mains-undervoltage shutdown (<1 V trip).

PC Monitor SMPS

VCR Power Conversion

Use Scenario: Compact, low-noise auxiliary power supply for LCD monitor logic boards with strict EMI limits.

IC Role / Device Role / Timing Role: QR controller with soft-start (Pin 4) and ringing suppression (Pin 1) for clean turn-on and reduced radiated emissions.

Use Value: Eliminates audible coil whine via adjustable 20–100 kHz frequency range and ZVS enforcement.

Use Scenario: Tape-based VCR with intermittent high-torque motor loads requiring momentary power boost.

IC Role / Device Role / Timing Role: Power management IC leveraging PMO (Pin 8) output to trigger temporary high-power mode during tape loading.

Use Value: Delivers up to 2× rated output power for <500 ms without thermal derating or instability.

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
TDA16847-2	Includes spike blanking on PVC (Pin 11) and VCC (Pin 14); improved startup behavior in synchronized mode	Better noise immunity in noisy industrial environments; preferred for new designs requiring long-term availability	Select when enhanced EMI robustness and transformer saturation prevention are required
ICE2A265	Integrated 650 V CoolMOS driver; no PMO output; fixed 65 kHz frequency; higher integration but less flexible regulation	Targeted at cost-sensitive, fixed-frequency SMPS where burst-mode power is unnecessary	Choose for simplified BOM and lower component count where adjustable frequency and PMO are not needed

Compared with TDA16847-2, the base TDA16847 offers identical core control but lacks spike blanking and optimized startup-making it suitable for legacy replacements. ICE2A265 trades flexibility for integration and eliminates the PMO function entirely, limiting use to fixed-load applications without transient power demands.

Availability

TDA16847 is available at Aetrix Electronics and suitable for TV power supplies, SAT receiver SMPS, and PC monitor conversion requiring stable component supply, long-lifecycle support, and through-hole manufacturing compatibility.

Supply support for TDA16847 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 design and manufacturing infrastructure.

The TDA16847 belongs to Infineon's legacy bipolar PWM controller product line, designed specifically for cost-effective, high-reliability quasi-resonant flyback power supplies in consumer electronics with PFC and low-standby-power requirements.

FAQ

What is the function of Pin 8 (PMO) on the TDA16847?

Pin 8 is the Power Measurement Output, an analog voltage proportional to instantaneous primary-side power. It enables temporary high-power burst operation by feeding into external circuitry that modulates duty cycle or frequency. This feature is exclusive to TDA16847 and TDA16847-2 variants-not present in TDA16846 series-and requires an external RC network to ground per datasheet Figure 17.

How does the TDA16847 achieve low standby power consumption?

The TDA16847 reduces switching frequency in discrete steps as load decreases, reaching an adjustable minimum (e.g., 20 kHz) in standby. Combined with ≤100 µA startup current and internal ZVS enforcement, this minimizes switching and conduction losses. No external start-up resistor is needed due to internal diode biasing from the auxiliary winding.

Can the TDA16847 operate in both free-running and synchronized modes?

Yes. Synchronization is enabled via Pin 7 (SYN): applying external clock pulses selects synchronized mode, while connecting an RC network between Pin 7 and ground configures fixed-frequency free-running operation. Startup defaults to free-running until RZI (Pin 3) pulses exceed 2.5 V, preventing transformer saturation during initial power-up.

What protection functions are integrated into the TDA16847?

The TDA16847 integrates VCC overvoltage (17.1 V) and undervoltage (9.5 V) lockout, primary voltage check (Pin 11, trips <1 V), two independent fault comparators (Pins 6 and 10), soft-start current limiting, and ringing suppression. All protections drive immediate shutdown of the OUT pin (Pin 13) to halt power delivery and prevent device or system damage.

TDA16847 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 FAQ

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

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

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

3.What payment methods are accepted for TDA16847?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA16847?

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

Once your TDA16847 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?

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

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

All TDA16847 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 meets industry standards.

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

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

Return procedure for TDA16847:

1.Submit a request within 90 days.

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

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