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

STMicroelectronics E-L6561D

Name: E-L6561D
Brand: STMicroelectronics
SKU: E-L6561D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: E-L6561D

Manufacturer:: STMicroelectronics

Category:: PFC (Power Factor Correction)

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: E-L6561D.pdf

Description:: IC PFC CTRLR TRANSITION 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:4,165

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Product details

Overview

E-L6561D from STMicroelectronics is a transition-mode Power Factor Correction (PFC) controller IC designed for AC-DC front-end stages in electronic lamp ballasts, SMPS, and adapters. It features 1% precision internal reference voltage (2.5 V @ Tj = 25°C), ±400 mA totem-pole gate driver output, micro-power start-up current (50 µA typ.), and integrated zero-current detection with disable function on ZCD pin - enabling efficient operation across 85–265 VAC input ranges.

For engineers reviewing the E-L6561D datasheet, E-L6561D pinout, E-L6561D application, or E-L6561D equivalent, key selection considerations include its adjustable dynamic/static overvoltage protection (OVP trigger at 35–45 µA), 4 mA typical operating supply current, transition-mode control architecture, and SO-8 package compatibility with legacy L6560 designs.

Technical Context

The E-L6561D implements a mixed-signal BCD process-based transition-mode PFC controller with an improved multiplier stage enabling stable THD performance across universal mains (85–265 VAC). Its internal 2.5 V reference feeds the error amplifier's non-inverting input, while the multiplier accepts rectified line voltage via pin MULT to generate a sinusoidal current reference.

Zero-current detection on pin ZCD enables boundary-conduction mode timing and supports hardware disable by pulling ZCD ≤ 200 mV - reducing quiescent current to 1.4 mA. The totem-pole output (pin GD) delivers ±400 mA peak drive capability directly into MOSFET/IGBT gates without external buffers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_REF	2.5 V ±1% @ T_j = 25°C - sets precise output voltage regulation point via R1/R2 feedback divider
I_START	50 µA typ. - enables low-power auxiliary supply design without dedicated start-up circuitry
I_Q	4 mA typ. - minimizes standby losses in continuous conduction during light-load conditions
OVP Trigger	40 µA ±5 µA - dynamic OVP threshold allows programmable overvoltage trip point via R1 value (∆V_OUT = R1 × 40 µA)
G_D Output	±400 mA peak - drives power switch directly; eliminates need for external gate driver in ≤120 W designs
ZCD Disable	V_DIS = 150–250 mV - enables system-level sleep mode with <2 mA total supply current
Operating V_CC	11–18 V - compatible with standard 12 V bias rails; UVLO turn-on at 12 V ±1 V ensures reliable restart

Pinout & Package

Package: SO-8 (Small Outline Integrated Circuit, 150 °C/W thermal resistance, JEDEC MS-012AC compliant).

Pin/Terminal	Circuit Role	Design Meaning
1 (INV)	Inverting input of error amplifier	Connects to voltage divider from regulated output; sets feedback loop gain and stability via external compensation network
2 (COMP)	Error amplifier output	Drives multiplier input; clamped between 2.25 V and 5.8 V to limit current reference range
3 (MULT)	Multiplier input	Accepts scaled rectified line voltage; multiplies with COMP signal to generate sinusoidal current command
4 (CS)	Current sense comparator input	Compares sensed switch current against internal 1.7 V threshold; triggers switching cycle termination
5 (ZCD)	Zero-current detector input	Detects inductor current zero-crossing for boundary-mode timing; grounded to disable device
6 (GND)	Analog/digital ground reference	Common return for control logic, driver, and sensing circuits; must be star-connected to minimize noise coupling
7 (GD)	Gate driver output	Pull-push stage delivering ±400 mA; directly interfaces with N-channel MOSFET/IGBT gate
8 (VCC)	Supply voltage input	Power rail for internal regulator, logic, and driver; includes 2.5 V hysteresis UVLO for robust start-up

Key Features

Feature	Design Value
Integrated OVP protection	Dynamic (35–45 µA) and static (2.1–2.4 V) thresholds enable dual-stage output overvoltage shutdown without external comparators
On-chip current sense filter	Eliminates need for external RC filter on CS pin - reduces component count and layout sensitivity to noise
Start-up timer	70–400 µs internal delay prevents premature switching before VCC reaches UVLO threshold
Disable function	ZCD pin double-functionality allows system-level power-down with <2 mA total supply current
Mixed BCD technology	Enables high-voltage tolerance (22 V Zener clamp), precision analog blocks, and robust digital logic in single die

Applications

Electronic Lamp Ballast

AC-DC Adaptor

Use Scenario: High-efficiency 80 W fluorescent lamp ballast operating from 85–265 VAC mains.

IC Role / Device Role / Timing Role: Transition-mode PFC controller regulating boost converter to deliver 400 VDC bus with >0.99 PF and <3.7% THD (with reducer).

Use Value: Enables compliance with IEC 61000-3-2 Class C harmonic limits using single-stage PFC without additional filtering components.

Use Scenario: Universal-input 120 W laptop adapter with active PFC front-end.

IC Role / Device Role / Timing Role: Boundary-conduction mode controller synchronizing MOSFET switching to inductor current zero-crossing for minimal EMI and conduction loss.

Use Value: Achieves 97.3% efficiency at 265 VAC full load while maintaining <8.1% THD - reducing heatsink size and audible noise.

Industrial SMPS

LED Driver Front-End

Use Scenario: 80 W industrial power supply for PLC I/O modules requiring wide-input-range PFC.

IC Role / Device Role / Timing Role: Primary-side PFC controller managing boost stage with adaptive OVP to protect downstream DC-DC converters.

Use Value: Programmable OVP (via R1) allows safe operation under varying output loads and line surges without sacrificing regulation accuracy.

Use Scenario: Constant-current LED driver for street lighting with 400 VDC intermediate bus.

IC Role / Device Role / Timing Role: Input-stage PFC controller ensuring stable high-voltage bus for isolated flyback LED current regulation.

Use Value: Integrated ZCD disable enables seamless dimming interface - pulling ZCD low reduces system standby consumption to <2 mA.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
L6561	DIP-8 package only; identical electrical specs but higher thermal resistance (100 °C/W vs. SO-8's 150 °C/W)	Suitable for through-hole prototyping or legacy board reuse; lacks surface-mount manufacturability	Select when DIP-8 footprint matches existing PCB or evaluation needs
UCC28019	Fixed-frequency CCM PFC controller; no ZCD pin or transition-mode operation; requires external current sense amplifier	Better suited for >250 W designs where continuous conduction improves efficiency; not drop-in replaceable	Choose for higher-power systems needing tighter current regulation and lower THD at cost of complexity

Compared with L6561 and UCC28019, E-L6561D offers optimal balance of integration (on-chip ZCD, OVP, reference), low-component-count transition-mode operation, and SO-8 manufacturability - making it ideal for cost-sensitive 80–120 W universal-input PFC stages where THD <5% and PF >0.99 are required.

Availability

E-L6561D is available at Aetrix Electronics and suitable for electronic lamp ballasts, AC-DC adapters, and industrial SMPS requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for E-L6561D 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 automotive ICs with vertical manufacturing capabilities.

E-L6561D belongs to ST's legacy Power Factor Correction controller product line, engineered specifically for cost-effective, high-efficiency transition-mode PFC in lighting and adapter applications - emphasizing integration, reliability, and universal-input operation.

FAQ

What is the purpose of the ZCD pin on E-L6561D?

The ZCD (Zero Current Detection) pin serves two functions: first, it detects inductor current zero-crossing to synchronize switching in transition mode; second, it provides hardware disable capability - pulling ZCD ≤ 200 mV forces the IC into ultra-low-power standby (<2 mA supply current) while retaining full restart functionality upon release.

How does the OVP protection work in E-L6561D?

E-L6561D implements dual-stage OVP: dynamic OVP triggers at ~40 µA error amplifier input current (caused by overvoltage-induced feedback current), forcing immediate switch-off; if overvoltage persists, static OVP activates via internal comparator at 2.25 V threshold, holding the output disabled until reset. Both thresholds are temperature-compensated per Figures 11 and 14.

Can E-L6561D drive a 600 V MOSFET directly?

Yes - the GD pin delivers ±400 mA peak source/sink current with <2 V dropout at 200 mA sink, enabling direct drive of common 600 V N-channel MOSFETs (e.g., STP8NM50, STP5NA50) without external buffers. Layout best practices require short, low-inductance gate traces and local 100 nF decoupling at VCC.

Is E-L6561D pin-compatible with L6560?

Yes - E-L6561D maintains full pin-to-pin and functional compatibility with L6560, including identical SO-8/DIP-8 footprints and register mapping. Key improvements include reduced start-up current (50 µA vs. 100 µA), added ZCD disable, and enhanced multiplier linearity for wider input voltage range (85–265 VAC) with lower THD.

E-L6561D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Mode:: Discontinuous (Transition)

Frequency - Switching:: -

Current - Startup:: 50 µA

Voltage - Supply:: 11V ~ 18V

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

E-L6561D FAQ

1.How can I place an order for E-L6561D through Aetrix?

Please submit a Request for Quotation (RFQ) for E-L6561D 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 E-L6561D reliable?

The price and inventory of E-L6561D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-L6561D is usually 5 days.

3.What payment methods are accepted for E-L6561D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-L6561D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for E-L6561D?

E-L6561D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your E-L6561D 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 E-L6561D?

For technical support, including E-L6561D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-L6561D requirements.

6.How does Aetrix verify that E-L6561D is sourced from the original manufacturer or authorized distributors?

All E-L6561D 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 E-L6561D meets industry standards.

7.What is the process for return or replacement of E-L6561D?

All E-L6561D units undergo pre-shipment inspection (PSI). If there is an issue with E-L6561D, 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 E-L6561D part is unused and in its original packaging.

Return procedure for E-L6561D:

1.Submit a request within 90 days.

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

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