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STMicroelectronics L6563
- Part No.:
- L6563
- Manufacturer:
- STMicroelectronics
- Category:
- PFC (Power Factor Correction)
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
L6563.pdf
- Description:
- IC PFC CTRLR TRANSITION 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,974
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Product details
Overview
L6563 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 integrates a 1.5% internal voltage reference, 600 mA source / 800 mA sink totem-pole gate driver, and inductor saturation detection-enabling EN61000-3-2 compliance in >350W SMPS for desktop PCs and server power supplies.
For engineers reviewing the L6563 datasheet, L6563 pinout, L6563 application, or L6563 equivalent, key selection considerations include its tracking boost function, dual-stage OVP (static + dynamic), feedback loop failure latched shutdown, 1/V² voltage feedforward, and unique ZCD-based zero-current sensing for precise TM operation.
Technical Context
The L6563 implements current-mode control in transition mode using a zero-current detector (ZCD) on pin 11 to trigger MOSFET turn-on at inductor demagnetization. Its highly linear multiplier (gain = 0.45 typ.) accepts rectified mains via MULT (pin 3) and RMS-derived feedforward via VFF (pin 5), enabling 1/V² gain compensation for stable THD across universal input (90–264 VAC).
It features dual protection architecture: PFC_OK (pin 7) provides latched overvoltage shutdown above 2.5 V, while CS (pin 4) detects inductor saturation at 1.7 V (L6563-only), asserting PWM_LATCH (pin 8) to disable downstream PWM controllers. The RUN (pin 10) input enables brownout detection with 0.52 V disable / 0.6 V enable thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 1.5% @ TJ = 25°C - ensures tight output voltage regulation in PFC stage without external reference |
| Gate Drive | −600/+800 mA totem pole - directly drives high-Ciss MOSFETs/IGBTs without external buffer |
| OVP Threshold | 2.5 V (latched) on PFC_OK - protects against feedback loop failure by halting operation until VCC cycle |
| CS Saturation Detect | 1.7 V threshold on pin 4 - shuts down IC during boost inductor core saturation (L6563 exclusive) |
| Start-up Current | ≤90 µA - enables low-power auxiliary supply design with minimal standby loss |
| Voltage Feedforward | 1/V² correction via VFF pin - maintains constant loop gain and <0.5% THD across 90–264 VAC input |
| Tracking Boost | Adjustable via TBO (pin 6) resistor - dynamically scales PFC output voltage with line RMS for efficiency optimization |
Pinout & Package
SO-14 surface-mount package with exposed pad thermal enhancement per STMicroelectronics mechanical data (Package code: SO14). Pin numbering follows standard top-view layout with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INV) | Inverting input of error amplifier | Receives scaled PFC output voltage; sinks programmable current from TBO for tracking boost |
| 2 (COMP) | Error amplifier output | Drives multiplier input; requires RC network to pin 1 for loop stability and THD optimization |
| 3 (MULT) | Main multiplier input | Connects to rectified mains via divider; defines sinusoidal current reference for TM control |
| 4 (CS) | Current sense comparator input | Detects MOSFET current; triggers latched shutdown at 1.7 V if inductor saturates (L6563 only) |
| 5 (VFF) | Voltage feedforward input | Accepts peak-hold DC voltage proportional to VAC,RMS; enables 1/V² gain correction |
| 6 (TBO) | Tracking boost output | Buffered VFF voltage; sets current sunk from INV to scale output voltage with line voltage |
| 7 (PFC_OK) | OVP & disable monitor | Latched shutdown >2.5 V (feedback failure); disable <0.2 V (remote OFF); restart >0.26 V |
| 8 (PWM_LATCH) | Fault signaling output | Open-drain high during OVP or CS fault; used to latch-disable downstream PWM controller |
| 9 (PWM_STOP) | Temporary stop output | Pulled low when RUN <0.52 V; used to pause DC-DC converter during light-load PFC disable |
| 10 (RUN) | Remote ON/OFF control | 0.52 V disable / 0.6 V enable; configurable as brownout detector by connecting to VFF |
| 11 (ZCD) | Zero-current detector input | Senses boost inductor demagnetization; negative edge triggers MOSFET turn-on for TM timing |
| 12 (GND) | Signal & gate driver ground | Common return for analog circuitry and 800 mA sink driver; requires low-impedance PCB plane |
| 13 (GD) | Gate driver output | Totem-pole output clamped to ~12 V; drives gate capacitance directly with 600 mA source capability |
| 14 (VCC) | Supply voltage input | 10.3–22 V operating range; UVLO at 11 V turn-on / 9.5 V turn-off; includes internal zener clamp |
Key Features
| Feature | Design Value |
|---|---|
| Inductor saturation detection | Hardware-level 1.7 V CS threshold with latched shutdown - prevents magnetic component damage and system instability |
| Tracking boost function | Programmable output voltage scaling via TBO resistor - improves light-load efficiency and reduces capacitor stress |
| Feedback failure protection | Latched PFC_OK >2.5 V shutdown - eliminates risk of uncontrolled overvoltage due to optocoupler or divider failure |
| 1/V² voltage feedforward | Internal multiplier correction using VFF pin - maintains <5% THD across full input range without trimming |
| Low quiescent consumption | 5 mA max. running current, ≤90 µA start-up - supports energy-efficient standby and light-load operation |
| Cascaded converter interface | Dedicated PWM_LATCH and PWM_STOP outputs - enables coordinated safety shutdown and light-load sequencing with DC-DC stage |
Applications
| Desktop PC Power Supply | Server Front-End PFC |
|---|---|
Use Scenario: 500–800W ATX-compatible PSU with active PFC stage meeting 80 PLUS Gold requirements. IC Role / Device Role / Timing Role: Transition-mode PFC controller regulating 380–400 VDC bus; uses ZCD for precise MOSFET turn-on timing and VFF for 1/V² line-voltage compensation. Use Value: Enables >95% PFC efficiency at 50% load and <5% THD across 90–264 VAC, satisfying IEC61000-3-2 Class D. |
Use Scenario: Redundant 1 kW server power module requiring high reliability and thermal margin. IC Role / Device Role / Timing Role: Primary PFC controller with latched OVP and inductor saturation detection; coordinates with downstream LLC resonant controller via PWM_LATCH. Use Value: Prevents catastrophic overvoltage during optocoupler failure and avoids core saturation under transient overload, extending system MTBF. |
| High-End Audio Amplifier PSU | Industrial Motor Drive Pre-Regulator |
Use Scenario: Dual-rail ±35 V audio amplifier with >300W PFC front-end for low-noise, low-THD operation. IC Role / Device Role / Timing Role: Precision PFC controller using tracking boost to reduce hold-up capacitor stress during brownout conditions. Use Value: Maintains regulated bus during 10% line sag while minimizing ripple and EMI, preserving signal integrity in sensitive analog stages. |
Use Scenario: 750W variable-frequency drive with integrated PFC stage compliant with JEITA-MITI harmonic limits. IC Role / Device Role / Timing Role: Robust PFC controller interfacing with isolated gate driver; uses RUN pin for coordinated enable/disable with motor control logic. Use Value: Supports safe soft-start and emergency shutdown sequences via PWM_STOP, meeting IEC61800-3 functional safety requirements. |
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 average current mode; no ZCD or TM support | Requires different magnetics design; better suited for >1 kW fixed-frequency PFC | Select for higher power density and lower EMI in CCM designs where TM switching noise is unacceptable |
| L6562A | Legacy TM PFC controller; lacks tracking boost, VFF feedforward, and PFC_OK latched OVP | No 1/V² correction → higher THD at low line; no remote disable → limited energy-saving compliance | Select only for cost-sensitive, non-compliant legacy designs where feature set reduction is acceptable |
Compared with UCC28070 and L6562A, the L6563 uniquely delivers transition-mode operation with hardware-enforced inductor saturation protection and programmable tracking boost-making it optimal for 350–800W EN61000-3-2-compliant systems requiring robustness, efficiency, and design flexibility.
Availability
L6563 is available at Aetrix Electronics and suitable for desktop PC power supplies, server front-end PFC stages, and high-end audio amplifier PSUs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for L6563 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, and microcontroller solutions for industrial, automotive, and consumer markets.
The L6563 belongs to ST's high-performance PFC controller product line, engineered specifically for transition-mode AC-DC conversion in >350W applications demanding low THD, high efficiency, and comprehensive fault protection.
FAQ
What is the key functional difference between L6563 and L6563A?
The sole functional difference is inductor saturation detection: the L6563 includes a 1.7 V threshold on the CS pin (pin 4) that triggers latched shutdown upon saturation, while the L6563A omits this feature. All other specifications-including pinout, electrical characteristics, and protection functions-are identical. This makes L6563 preferred for high-reliability designs where magnetic component failure must be actively prevented.
How does the tracking boost function improve system efficiency?
The tracking boost function uses the TBO pin (6) to sink programmable current from the INV pin (1), dynamically lowering the PFC output voltage as AC input voltage decreases. This reduces conduction losses in downstream DC-DC stages and minimizes hold-up capacitor stress during brownout conditions-improving light-load efficiency by up to 1.2% and extending capacitor lifetime in 230 VAC nominal systems.
Can L6563 drive SiC MOSFETs directly?
No. While the L6563's 600 mA source / 800 mA sink gate driver can drive silicon MOSFETs and IGBTs directly, SiC MOSFETs typically require faster rise/fall times (<50 ns), higher peak current (>1 A), and negative turn-off bias-beyond the L6563's capabilities. A dedicated gate driver (e.g., STGAP2SICSN) is required for SiC implementation, with L6563 providing the PWM signal via GD output.
What is the purpose of the PWM_LATCH and PWM_STOP pins?
PWM_LATCH (pin 8) is an open-drain fault output asserted high during latched events (PFC_OK >2.5 V or CS >1.7 V), used to permanently disable the downstream PWM controller until reset. PWM_STOP (pin 9) is pulled low during RUN-initiated disable, allowing temporary suspension of the DC-DC stage-enabling light-load energy-saving modes per Energy Star requirements without full system shutdown.
L6563 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
L6563 FAQ
1.How can I place an order for L6563 through Aetrix?
Please submit a Request for Quotation (RFQ) for L6563 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 L6563 reliable?
The price and inventory of L6563 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6563 is usually 5 days.
3.What payment methods are accepted for L6563?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6563 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6563?
L6563 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6563 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 L6563?
For technical support, including L6563 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6563 requirements.
6.How does Aetrix verify that L6563 is sourced from the original manufacturer or authorized distributors?
All L6563 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 L6563 meets industry standards.
7.What is the process for return or replacement of L6563?
All L6563 units undergo pre-shipment inspection (PSI). If there is an issue with L6563, 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 L6563 part is unused and in its original packaging.
Return procedure for L6563:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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