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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > PFC (Power Factor Correction)

STMicroelectronics L6563ATR

Name: L6563ATR
Brand: STMicroelectronics
SKU: L6563ATR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6563ATR

Manufacturer:: STMicroelectronics

Category:: PFC (Power Factor Correction)

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

Datasheet:: L6563ATR.pdf

Description:: IC PFC CTRLR TRANSITION 14SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6563ATR from STMicroelectronics is an advanced transition-mode (TM) power factor correction (PFC) controller in SO-14 package, designed for high-efficiency AC-DC pre-regulators. It delivers 1.5% internal reference voltage accuracy (@T_J = 25°C), ≤90 µA start-up current, and a ±600/±800 mA totem-pole gate driver optimized for driving MOSFETs or IGBTs in >350W IEC61000-3-2-compliant SMPS systems.

For engineers reviewing the L6563ATR datasheet, L6563ATR pinout, L6563ATR application, or L6563ATR equivalent, key selection considerations include its precise output overvoltage protection (2.5 V latch threshold), input voltage feedforward (1/V²), tracking boost function, remote ON/OFF control via RUN pin (0.52 V disable threshold), and latched feedback failure protection - all critical for stable, energy-efficient PFC stage design in server and high-end adapter applications.

Technical Context

The L6563ATR implements current-mode control in transition mode with a highly linear multiplier and dedicated THD optimizer circuit, enabling low total harmonic distortion across wide input voltage ranges. Its 1/V² voltage feedforward improves loop stability and transient response during mains voltage fluctuations.

It integrates a precision 2.5 V error amplifier reference, programmable tracking boost via TBO pin (current-sink into INV), and dual-level OVP: static (2.15 V threshold) and dynamic (20 µA triggering current). Unlike the L6563, the L6563ATR omits inductor saturation detection on CS pin - a deliberate functional distinction confirmed in ST's device summary and block diagram.

Key Specifications

Parameter	Value and Actual Design Meaning
Control Mode	Transition-mode (TM) current-mode PFC controller - enables zero-current switching for high efficiency at light loads and reduced EMI.
Reference Voltage	2.5 V ±1.5% @ T_J = 25°C - ensures tight output voltage regulation in feedback loop without external reference.
Start-up Current	≤90 µA @ V_CC = 10 V - allows direct startup from high-impedance auxiliary supplies, reducing standby losses.
Gate Drive Capability	+600 mA / –800 mA totem-pole output - directly drives medium-power MOSFETs/IGBTs without external buffers in >350W designs.
OVP Threshold	2.5 V (latched) on PFC_OK pin - provides fail-safe shutdown if feedback loop fails or output exceeds safe limit.
UVLO Threshold	V_CC turn-on: 12 V typ., hysteresis: 2.7 V - ensures clean, jitter-free startup and brownout immunity.
Feedforward Input	V_FF pin supports 1/V² correction - compensates gain variation with line voltage, maintaining PF >0.95 over 90–264 V_AC.
Remote Control	RUN pin disable threshold: 0.52 V - enables precise brownout detection or system-level power sequencing.

Pinout & Package

SO-14 surface-mount package (JEDEC MS-012AC), 1.27 mm pitch, plastic body, rated for operation from –25°C to +150°C junction temperature.

Pin/Terminal	Circuit Role	Design Meaning
1 (INV)	Inverting input of error amplifier	Receives scaled output voltage; sinks current from TBO pin when tracking boost is enabled to dynamically adjust reference.
2 (COMP)	Error amplifier output	Drives multiplier input; compensation network between COMP and INV sets loop stability and THD performance.
3 (MULT)	Main multiplier input	Connects to rectified mains via resistor divider; establishes sinusoidal current reference for TM operation.
4 (CS)	Current sense comparator input	Detects MOSFET current; triggers PWM_LATCH on overcurrent (L6563 only); absent in L6563ATR.
5 (VFF)	Voltage feedforward input	Accepts peak-hold DC voltage proportional to RMS line; enables 1/V² gain correction for consistent PF.
6 (TBO)	Tracking Boost output	Buffered VFF voltage; sets current sink into INV pin to scale output voltage with line voltage (e.g., 380 V → 400 V).
7 (PFC_OK)	Output voltage monitor/disable	Latches shutdown if >2.5 V (feedback failure) or disables IC if <0.2 V - enables system-level fault coordination.
8 (PWM_LATCH)	Fault signaling output	Open-drain active-high signal to halt downstream PWM controller during PFC faults (e.g., OVP or latch event).
9 (PWM_STOP)	Temporary stop signaling	Active-low output asserted when RUN pin is disabled - used for light-load PFC disable per Energy Star requirements.
10 (RUN)	Remote ON/OFF control	0.52 V disable / 0.6 V enable thresholds - supports brownout detection or host-controlled PFC staging.
11 (ZCD)	Zero-current detection input	Senses boost inductor demagnetization; negative edge triggers MOSFET turn-on for accurate TM timing.
12 (GND)	Signal and gate driver ground	Common return for analog circuitry and 800 mA sink driver - requires low-inductance layout to prevent noise coupling.
13 (GD)	Gate driver output	Clamped to ~12 V max; drives gate capacitance directly - rise/fall times <80 ns support >100 kHz switching.
14 (VCC)	Supply voltage input	10.3–22 V operating range; internal zener clamps at 25 V - powers both logic and gate driver stages.

Key Features

Feature	Design Value
Precision internal reference	2.5 V ±1.5% tolerance at 25°C - eliminates need for external voltage reference in most PFC designs.
Low-power operation	≤90 µA start-up current and ≤5 mA quiescent current - reduces auxiliary supply burden and improves no-load efficiency.
Integrated protection suite	Latched OVP (2.5 V), feedback failure shutdown, UVLO with 2.7 V hysteresis - ensures robust fault handling without external circuitry.
Tracking Boost function	Adjustable output voltage scaling via TBO pin current - enables adaptive output (e.g., 380 V at 90 V_AC, 400 V at 264 V_AC) for optimal efficiency.
System interface capability	Dedicated PWM_LATCH and PWM_STOP pins - enables coordinated shutdown or light-load disable of downstream DC-DC converter.
Voltage feedforward (1/V²)	Compensates loop gain vs. line voltage - maintains >0.95 power factor across universal input range (90–264 V_AC).

Applications

Server Power Supply

High-End Desktop PC PSU

Use Scenario: 80 PLUS Platinum-certified 1200 W ATX power supply with active PFC stage.

IC Role / Device Role / Timing Role: Transition-mode PFC controller regulating 380–400 V DC bus; synchronizes MOSFET turn-on to inductor zero-current crossing.

Use Value: Enables >98% PFC stage efficiency at full load and <0.5 W no-load consumption via low-quiescent-current design.

Use Scenario: Compact 750 W SFX-L PSU for gaming desktops requiring IEC61000-3-2 Class D compliance.

IC Role / Device Role / Timing Role: Primary PFC controller managing boost stage with 1/V² feedforward and tracking boost for variable output voltage.

Use Value: Achieves <3% THD across 90–264 V_AC input thanks to linear multiplier and THD optimizer circuit.

Industrial AC-DC Adapter

Energy-Efficient Server Charger

Use Scenario: 500 W industrial adapter for factory automation equipment with strict EMI and PF requirements.

IC Role / Device Role / Timing Role: Core PFC controller interfacing with isolated DC-DC stage via PWM_LATCH for fault propagation.

Use Value: Latched OVP and feedback failure protection ensure safe shutdown during open-loop conditions, meeting IEC62368-1 safety mandates.

Use Scenario: Multi-output 400 W server charger complying with Energy Star 8.0 and Blue Angel standards.

IC Role / Device Role / Timing Role: PFC controller using RUN pin for brownout detection and PWM_STOP to disable PFC at light load (<10%).

Use Value: Reduces standby power to <0.3 W by entering ultra-low-quiescent (2.2 mA) state during light-load disable.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PFC controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UCC28070	Continuous conduction mode (CCM) controller with dual-edge modulation; no transition-mode operation or ZCD input.	Targets higher-power (>1 kW) industrial PFC where CCM efficiency and lower EMI are prioritized over cost and light-load performance.	Select UCC28070 only when CCM topology and interleaved operation are required; not drop-in compatible with L6563ATR's TM architecture.
L4984D	Fixed-frequency TM controller; lacks 1/V² feedforward, tracking boost, and latched OVP - offers only basic OVP at 2.7 V.	Suitable for cost-sensitive <300 W adapters where THD <10% and universal input are acceptable but not mandated.	Choose L4984D for simplified BOM and lower gate drive demand; avoid where 1/V² correction or adaptive output voltage is needed.

Compared with UCC28070 and L4984D, the L6563ATR uniquely combines transition-mode efficiency, 1/V² feedforward for wide-input PF stability, and tracking boost for adaptive output - making it optimal for 350–800 W EN61000-3-2-compliant systems requiring both performance and integration.

Availability

L6563ATR is available at Aetrix Electronics and suitable for server power supplies, high-end desktop PC PSUs, industrial AC-DC adapters, and energy-efficient server chargers requiring stable component supply and long-term lifecycle support.

Supply support for L6563ATR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, microcontrollers, and automotive ICs.

The L6563A product line targets high-efficiency, standards-compliant AC-DC front-end conversion - specifically engineered for transition-mode PFC in >350 W applications demanding low THD, precise OVP, and system-level fault coordination.

FAQ

What is the key functional difference between L6563ATR and L6563TR?

The L6563ATR excludes inductor saturation detection on the CS pin - a feature present in the L6563TR. This omission removes the 1.7 V latch-off threshold on pin 4 and eliminates the associated PWM_LATCH assertion for saturation events. All other features, including OVP, tracking boost, feedforward, and pinout, are identical. The L6563ATR is intended for designs where saturation protection is handled externally or deemed unnecessary.

Can L6563ATR be used in continuous conduction mode (CCM)?

No - the L6563ATR is exclusively designed for transition-mode (TM) operation. Its zero-current detector (ZCD) pin and internal timing architecture rely on detecting inductor demagnetization to trigger MOSFET turn-on. It lacks CCM-specific features such as ramp compensation, fixed-frequency oscillator, or average-current sensing inputs required for stable CCM control.

How does the tracking boost function affect output voltage regulation?

The tracking boost function uses the TBO pin to sink a current into the INV pin, effectively lowering the error amplifier's reference point. With a resistor from TBO to GND, the output voltage scales linearly with the mains voltage (e.g., 380 V at 90 V_AC, 400 V at 264 V_AC). This reduces conduction losses in the downstream DC-DC stage while maintaining regulation accuracy via the internal 2.5 V reference.

Is the L6563ATR RoHS compliant and halogen-free?

Yes - the L6563ATR is manufactured in STMicroelectronics' RoHS-compliant, lead-free, and halogen-free SO-14 package per specification document UM1084 (Rev 4, March 2007) and ST's official product change notifications. It meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for industrial temperature range (–25°C to +150°C).

L6563ATR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Mode:: Discontinuous (Transition)

Frequency - Switching:: -

Current - Startup:: 50 µA

Voltage - Supply:: 10.3V ~ 22V

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

L6563ATR FAQ

1.How can I place an order for L6563ATR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6563ATR 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 L6563ATR reliable?

The price and inventory of L6563ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6563ATR is usually 5 days.

3.What payment methods are accepted for L6563ATR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6563ATR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6563ATR?

L6563ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6563ATR 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 L6563ATR?

For technical support, including L6563ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6563ATR requirements.

6.How does Aetrix verify that L6563ATR is sourced from the original manufacturer or authorized distributors?

All L6563ATR 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 L6563ATR meets industry standards.

7.What is the process for return or replacement of L6563ATR?

All L6563ATR units undergo pre-shipment inspection (PSI). If there is an issue with L6563ATR, 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 L6563ATR part is unused and in its original packaging.

Return procedure for L6563ATR:

1.Submit a request within 90 days.

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

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