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

Infineon Technologies TDA16846GGEGHUMA1

Name: TDA16846GGEGHUMA1
Brand: Infineon Technologies
SKU: TDA16846GGEGHUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA16846GGEGHUMA1

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: TDA16846GGEGHUMA1.pdf

Description:: IC POWER SUPPLY CONTROLLER DSO14

Quantity:: RFQ Add To RFQ list

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Inventory:3,475

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Product details

Overview

TDA16846GGEGHUMA1 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, 14-pin DSO package, 5 V reference output (pin 9), and adjustable standby frequency down to 20 kHz. It enables low-power standby operation in consumer electronics SMPS designs with soft-start, mains undervoltage protection, and dual fault comparators.

For engineers reviewing the TDA16846GGEGHUMA1 datasheet, TDA16846GGEGHUMA1 pinout, TDA16846GGEGHUMA1 application, or TDA16846GGEGHUMA1 equivalent, key selection criteria include its quasi-resonant valley-switching capability, primary current simulation (PCS) input for power limiting, regulation/zero-crossing input (RZI) with 5 V threshold, VCC overvoltage lockout at 17.1 V, and compatibility with optocoupler feedback via OCI pin.

Technical Context

The TDA16846GGEGHUMA1 implements quasi-resonant valley-switching control to minimize switching losses by turning on the MOSFET at minimum drain-source voltage. Its RZI input monitors transformer control winding zero crossings and regulates via internal error amplifier or external optocoupler feedback.

It features dual fault comparators (FC1/FC2), synchronized/fixed-frequency mode via SYN pin, primary voltage check (PVC) with fold-back correction, and soft-start controlled by external capacitor on SRC pin. Startup current is <100 µA, and VCC supply is self-sustained via auxiliary winding after initial charge through internal diode D1.

Key Specifications

Parameter	Value and Actual Design Meaning
V_REF	5 V ±2% output at pin 9; powers external circuitry and enables FC2 via pull-down resistor
V_CC OV Threshold	17.1 V max; triggers overvoltage lockout to protect internal circuitry during surge events
I_START	<100 µA; enables direct startup from high-impedance sources without external start resistor
f_STANDBY	Adjustable down to 20 kHz; reduces audible noise and conduction losses during light-load conditions
I_DISCHARGE (Pin 2)	≥0.6 mA min; sets primary current limit threshold for power limiting via PCS network
t_DELAY (Pin 3)	Reduced delay to switch-on; prevents transformer saturation during fixed-frequency startup
V_PVC Threshold	1 V min; disables SMPS if primary bus voltage drops below safe operating level

Pinout & Package

Package: P-DSO-14-3 (14-pin plastic dual small outline, 300 mil width, gull-wing leads).

Pin/Terminal	Circuit Role	Design Meaning
1 OTC	Off-Time Control	RC network sets ringing suppression time and standby frequency; determines QR timing window
2 PCS	Primary Current Simulation	Capacitor + resistor network quantifies max output power; enables current-limiting without sense resistor
3 RZI	Regulation & Zero-Crossing Input	Accepts control winding pulses; >5 V disables regulation; 2.5 V threshold enables fixed-frequency startup
4 SRC	Soft-Start & Regulation Capacitor	External capacitor sets soft-start duration and loop response speed; defines control voltage ramp
5 OCI	Optocoupler Input	Direct optocoupler collector connection; eliminates need for series resistor to ground (V_IN range extended to 0 V)
6 FC2	Fault Comparator 2	Voltage >1.2 V disables SMPS; enabled via resistor from pin 9 to ground
7 SYN	Synchronization Input	Accepts external sync pulses or RC network for fixed-frequency operation; improves startup stability
8 N.C.	No Connect	Not bonded; must be left floating (TDA16846-2 variant; distinguishes from TDA16847-2 PMO pin)
9 REF	Reference Voltage Output	Stable 5 V ±2% source; powers external components and enables FC2 comparator bias
10 FC1	Fault Comparator 1	Voltage >1 V disables SMPS; provides fast shutdown for overcurrent or overtemperature events
11 PVC	Primary Voltage Check	Monitors rectified mains bus; <1 V triggers undervoltage shutdown; enables fold-back correction in QR mode
12 GND	Ground Reference	Analog and power ground return; requires low-inductance layout for noise immunity
13 OUT	Gate Driver Output	Push-pull driver capable of sinking/sourcing ≥200 mA; directly drives MOSFET gate via series resistor
14 VCC	Supply Voltage Input	Startup via internal diode D1 and PCS network; sustained by auxiliary winding; 17.1 V OV lockout

Key Features

Feature	Design Value
Quasi-Resonant Valley Switching	Reduces EMI and switching losses by triggering MOSFET turn-on at minimum V_DS points
Adjustable Standby Frequency	Down to 20 kHz via OTC pin RC network; maintains efficiency while eliminating audible noise
Primary Current Simulation (PCS)	Enables accurate power limiting without primary-side shunt resistor or transformer auxiliary winding
Mains Undervoltage Protection	Shuts down SMPS when PVC pin voltage falls below 1 V; prevents unstable operation during brownouts
Spike-Blanked PVC & VCC Inputs	Immunity to transient spikes on pins 11 and 14 ensures reliable operation in noisy AC-line environments

Applications

TV Power Supplies

SAT Receiver SMPS

Use Scenario: 24–32 W off-line flyback converter powering main board and display backlight in CRT/LCD TVs.

IC Role / Device Role / Timing Role: Primary-side QR controller managing PFC pre-regulator and main DC-DC stage; regulates via RZI zero-cross detection.

Use Value: Enables <150 mW no-load consumption and meets EU ErP Lot 6 standby requirements.

Use Scenario: Compact 12–18 W SMPS for satellite set-top boxes with variable load profiles and thermal constraints.

IC Role / Device Role / Timing Role: Quasi-resonant controller with adaptive frequency scaling; adjusts switching frequency from 65 kHz (full load) to 20 kHz (standby).

Use Value: Reduces transformer core loss by 35% at light loads versus fixed-frequency alternatives.

PC Monitor Power

VCR Power Supply

Use Scenario: 20–25 W multi-output flyback supplying logic, analog, and heater rails in LCD monitors.

IC Role / Device Role / Timing Role: Dual-fault protected controller using FC1 for overcurrent and FC2 for overvoltage; regulated via optocoupler on OCI pin.

Use Value: Eliminates need for external voltage supervisor ICs; reduces BOM count by one component.

Use Scenario: Legacy VCR power supply requiring robust startup under low-mains conditions and wide temperature range.

IC Role / Device Role / Timing Role: Mains undervoltage protection via PVC pin; soft-start via SRC capacitor prevents inrush-induced transformer saturation.

Use Value: Achieves reliable cold-start at 85 VAC/50 Hz without auxiliary start circuitry.

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
ICE2QS03G	Integrated 650 V CoolMOS driver; no PCS input; fixed 65 kHz base frequency; no RZI zero-cross input	Requires external current sensing; lacks adaptive standby frequency scaling; suited for cost-sensitive fixed-frequency designs	Select when primary-side sensing is preferred and standby power is not critical
KA5Q1265RTD	Discrete BJT-based QR controller; no integrated reference; higher start-up current (500 µA); no PVC undervoltage protection	Lacks built-in 5 V REF and fault comparators; requires external voltage supervisor and reference IC	Select only for legacy repair or ultra-low-cost replacements where BOM count is secondary

Compared with ICE2QS03G and KA5Q1265RTD, TDA16846GGEGHUMA1 uniquely combines primary current simulation, RZI-based zero-cross regulation, and adjustable 20–65 kHz standby frequency - enabling lower no-load power, reduced EMI, and simplified PFC integration without external sensing components.

Availability

TDA16846GGEGHUMA1 is available at Aetrix Electronics and suitable for TV power supplies, SAT receiver SMPS, PC monitor power, and VCR power supply designs requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TDA16846GGEGHUMA1 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 consumer power supplies, delivering quasi-resonant control with integrated PFC support, low standby power, and robust protection - specifically engineered for CRT/LCD TV, set-top box, and monitor SMPS applications.

FAQ

What is the function of Pin 8 on TDA16846GGEGHUMA1?

Pin 8 is Not Connected (N.C.) on TDA16846GGEGHUMA1. It is an unconnected die pad with no internal bond wire. This distinguishes it from the TDA16847-2 variant, where Pin 8 serves as the Power Measurement Output (PMO) for temporary high-power burst mode. PCB layout must leave Pin 8 floating with no trace or solder mask opening.

How does the Primary Current Simulation (PCS) circuit work on Pin 2?

The PCS circuit on Pin 2 uses an external capacitor and resistor network between Pin 2 and the positive terminal of the primary electrolytic capacitor to emulate primary current flow. This allows the IC to estimate output power and implement fold-back current limiting without a dedicated current-sense resistor or transformer auxiliary winding, reducing component count and losses.

Can TDA16846GGEGHUMA1 operate in fixed-frequency mode without external synchronization?

Yes. Fixed-frequency operation is achieved by connecting an RC network between Pin 7 (SYN) and ground. The resistor and capacitor values determine the oscillator frequency. Unlike synchronized mode, no external clock signal is required. Startup in fixed-frequency mode is stabilized by initial free-running operation until RZI pulses exceed 2.5 V, preventing transformer saturation.

What is the purpose of the spike blanking feature on Pins 11 and 14?

Spike blanking on Pins 11 (PVC) and 14 (VCC) suppresses short-duration voltage transients (<100 ns) that could falsely trigger undervoltage or overvoltage lockout. This is implemented via internal pulse-width filtering and ensures reliable operation during line surges, switching noise, or transformer leakage spikes without compromising protection responsiveness.

TDA16846GGEGHUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

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:: Surface Mount

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

TDA16846GGEGHUMA1 FAQ

1.How can I place an order for TDA16846GGEGHUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA16846GGEGHUMA1 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 TDA16846GGEGHUMA1 reliable?

The price and inventory of TDA16846GGEGHUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA16846GGEGHUMA1 is usually 5 days.

3.What payment methods are accepted for TDA16846GGEGHUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA16846GGEGHUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA16846GGEGHUMA1?

TDA16846GGEGHUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA16846GGEGHUMA1 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 TDA16846GGEGHUMA1?

For technical support, including TDA16846GGEGHUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA16846GGEGHUMA1 requirements.

6.How does Aetrix verify that TDA16846GGEGHUMA1 is sourced from the original manufacturer or authorized distributors?

All TDA16846GGEGHUMA1 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 TDA16846GGEGHUMA1 meets industry standards.

7.What is the process for return or replacement of TDA16846GGEGHUMA1?

All TDA16846GGEGHUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA16846GGEGHUMA1, 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 TDA16846GGEGHUMA1 part is unused and in its original packaging.

Return procedure for TDA16846GGEGHUMA1:

1.Submit a request within 90 days.

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

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