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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Infineon Technologies ICL8105XUMA2

Name: ICL8105XUMA2
Brand: Infineon Technologies
SKU: ICL8105XUMA2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICL8105XUMA2

Manufacturer:: Infineon Technologies

Category:: LED Drivers

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

Datasheet:: ICL8105XUMA2.pdf

Description:: IC LED DRIVER OFFL PWM 8DSO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ICL8105XUMA2 from Infineon is a digital single-stage QR flyback controller with integrated PFC for constant-current LED drivers, delivering ±3% line/load current regulation, 0.99 typical PF, and up to 91% efficiency across 85–305 V_AC input and 4× output voltage range. It enables primary-side dimming via microcontroller PWM or isolated 0–10 V using CDM10V.

For engineers reviewing the ICL8105XUMA2 datasheet, ICL8105XUMA2 pinout, ICL8105XUMA2 application, or ICL8105XUMA2 equivalent, key selection criteria include primary-side current sensing accuracy, configurable multi-mode operation (QRM/DCM/ABM), UART-based parameter tuning, HV startup cell integration, and thermal-adaptive protection architecture.

Technical Context

The ICL8105 implements a microcontroller-based digital control engine that executes real-time PFC and quasi-resonant flyback regulation without secondary feedback. Its ZCD pin performs dual-function zero-crossing detection and sampled AC/DC voltage sensing, while the CS pin enables precise primary-side current reconstruction using a shunt resistor and MOSFET source node.

Multi-mode operation dynamically selects between quasi-resonant (QRM), discontinuous conduction (DCM), and active burst mode (ABM) based on load and input conditions. The DIM/UART pin supports either analog dimming (0.1–2.0 V) or UART configuration-mode selection is voltage-triggered above 2.2 V-and SQW provides programmable square-wave output for isolated dimming interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Single-stage QR flyback with integrated PFC - eliminates separate PFC stage and reduces BOM count.
Output Current Regulation	±3% line/load regulation - enables stable LED current without optocoupler or secondary-side sensing.
Power Factor	Typ. 0.99 at full load - meets EN61000-3-2 Class C requirements for lighting equipment.
Efficiency	Up to 91% - minimizes thermal stress in enclosed LED luminaires (5–80 W).
Input Voltage Range	85–305 V_AC - supports universal mains operation including 277 V_AC commercial lighting.
Output Voltage Range	Up to 4× minimum load voltage - accommodates wide LED string configurations without hardware change.
Startup Method	Integrated 600 V HV startup cell - enables direct connection to rectified input, eliminating external startup resistor.

Pinout & Package

ICL8105XUMA2 is housed in a PG-DSO-8 (150-mil) package with exposed thermal pad for enhanced power dissipation in LED driver applications.

Pin/Terminal	Circuit Role	Design Meaning
ZCD	Zero-Crossing Detection & Voltage Sensing Input	Connects to auxiliary winding for synchronization and sampled input/output voltage measurement - critical for PFC timing and regulation accuracy.
DIM/UART	Configurable Analog Dimming / UART Interface	Accepts 0.1–2.0 V dimming signal or switches to UART mode above 2.2 V - enables firmware updates and runtime parameter tuning without extra pins.
CS	Current Sense Input	Measures MOSFET source current via external shunt - forms basis of primary-side constant-current control loop.
GD	Gate Driver Output	Drives external 600 V MOSFET with configurable gate voltage slope - reduces EMI during switching transitions.
HV	High-Voltage Startup & Input Sensing	Connects directly to rectified input; powers internal 600 V startup cell and enables input frequency tracking - removes need for external bias supply.
SQW	Square Wave Generator Output	Programmable clock output for driving isolated dimming transformers or CDM10V interface - optional, disableable via configuration.
VCC	Supply Voltage Input	Regulated IC power rail (typ. 10.5 V); sourced internally after HV startup - requires local decoupling for stable operation.
GND	Power & Signal Reference	Common return path for all analog/digital functions and gate drive - must be low-impedance to maintain regulation accuracy.

Key Features

Feature	Design Value
Primary-Side Constant Current Control	Eliminates optocoupler, TL431, and secondary-side feedback components - reduces cost and improves long-term reliability in LED drivers.
Configurable Multi-Mode Operation	Automatically selects QRM, DCM, or ABM based on load and input - optimizes efficiency across full operating range including no-load standby.
Integrated HV Startup Cell	600 V-rated internal circuit - enables direct connection to bulk DC, removing external high-voltage resistor and associated power loss.
Thermal Protection with Adaptive Response	Internal temperature sensor triggers progressive derating before shutdown - maintains safe junction temperature under sustained overload or poor heatsinking.
UART-Based Parameter Tuning	Single-pin (DIM/UART) configuration interface - allows field updates of dimming curves, protection thresholds, and soft-start timing without hardware modification.

Applications

LED Street Lighting

Commercial Downlight Drivers

Use Scenario: Outdoor 50–100 W LED street luminaire operating from 277 V_AC with 0–10 V DALI-2 gateway interface.

IC Role / Device Role / Timing Role: Primary-side digital flyback controller executing PFC + constant-current regulation + isolated dimming interface via CDM10V.

Use Value: Enables compact, fanless design with <10% THD and ±3% current stability over temperature and line variation - meets DLC Premium requirements.

Use Scenario: Indoor 20 W recessed downlight with microcontroller-based PWM dimming on primary side.

IC Role / Device Role / Timing Role: Digital controller managing QR flyback switching, input voltage synchronization via ZCD, and real-time current regulation using CS-sensed MOSFET source voltage.

Use Value: Removes secondary feedback components and supports flicker-free dimming down to 1% with <1% current ripple - compliant with IEEE 1789-2015.

Industrial High-Bay LED Fixtures

Smart Building Emergency Drivers

Use Scenario: 80 W high-bay fixture in warehouse environment with wide ambient temperature range (−40°C to +65°C).

IC Role / Device Role / Timing Role: Core regulation IC implementing adaptive thermal derating, multi-mode switching, and HV startup for robust cold-start performance.

Use Value: Maintains regulated output current within ±5% across full temperature range and supports >100,000-hour MTBF - exceeds IEC 62384 lifetime requirements.

Use Scenario: Emergency LED driver with battery backup, requiring ultra-low standby power (<0.5 W) and fast switchover.

IC Role / Device Role / Timing Role: Controller enabling active burst mode (ABM) during no-load, automatic discharge circuit activation, and seamless transition between mains/battery sources.

Use Value: Achieves <0.3 W standby consumption and <100 ms switchover time - satisfies EN 60598-2-22 Annex D requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE5QRSD20G	Analog QR flyback controller with fixed PFC; no digital configuration, no UART, no primary-side dimming support.	Limited to non-dimming or trailing-edge dimmed systems; lacks isolated 0–10 V interface capability.	Select when cost sensitivity outweighs configurability needs and dimming flexibility is not required.
UCC28056	Fixed-frequency CCM PFC + analog flyback combo; two-chip solution requiring external optocoupler and TL431.	Higher BOM count and larger footprint; no primary-side current regulation - relies on secondary feedback.	Choose only if legacy analog design infrastructure exists and digital control migration is not planned.

Compared with ICE5QRSD20G and UCC28056, ICL8105XUMA2 delivers higher integration (single-chip PFC+flyback), eliminates secondary feedback, supports both primary and isolated dimming, and enables field-tunable parameters - making it optimal for next-generation smart LED drivers where size, efficiency, and flexibility are critical.

Availability

ICL8105XUMA2 is available at Aetrix Electronics and suitable for LED street lighting, commercial downlights, industrial high-bay fixtures, and smart building emergency drivers requiring stable component supply and long lifecycle support.

Supply support for ICL8105XUMA2 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 is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in high-voltage analog and digital power solutions.

The ICL8105 belongs to Infineon's XDP™ digital power platform, designed specifically for high-efficiency, digitally configurable AC/DC LED drivers that eliminate secondary feedback while meeting global energy efficiency and lighting standards.

FAQ

What is the function of the DIM/UART pin on ICL8105XUMA2?

The DIM/UART pin serves dual roles: as an analog dimming input (0.1–2.0 V range) for primary-side PWM dimming, or as a UART interface for configuring operational parameters. Mode selection is voltage-triggered - above 2.2 V, the pin enters UART mode and disables dimming until reset. This eliminates the need for dedicated configuration pins while maintaining compatibility with existing microcontroller-based dimming systems.

Does ICL8105XUMA2 require an external optocoupler for regulation?

No. ICL8105XUMA2 implements primary-side constant-current regulation using ZCD and CS inputs to reconstruct output current and voltage without secondary-side feedback. This eliminates the optocoupler, TL431, and associated compensation network - reducing BOM count, improving reliability, and simplifying layout in isolated LED drivers.

How does the HV pin enable startup without an external resistor?

The HV pin connects directly to the rectified input and powers an integrated 600 V startup cell that pre-charges the VCC rail. Once VCC reaches its UVLO threshold (~10.5 V), the IC begins operation and sustains VCC via auxiliary winding. This removes the need for a high-voltage startup resistor, eliminating its power loss and failure risk in high-input-voltage applications like 277 V_AC lighting.

Can ICL8105XUMA2 support both leading-edge and trailing-edge dimmers?

ICL8105XUMA2 does not directly interface with phase-cut dimmers. It supports 0–10 V analog dimming (via CDM10V) and microcontroller PWM dimming on the primary side. For phase-cut compatibility, an external front-end dimmer interface circuit is required - the IC itself regulates output current based on the received dimming signal, not the AC phase angle.

ICL8105XUMA2 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: AC DC Offline Switcher

Topology:: Flyback

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 6V

Voltage - Supply (Max):: 24V

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: -

Dimming:: Analog, PWM

Applications:: Lighting

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8

ICL8105XUMA2 FAQ

1.How can I place an order for ICL8105XUMA2 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICL8105XUMA2 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 ICL8105XUMA2 reliable?

The price and inventory of ICL8105XUMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL8105XUMA2 is usually 5 days.

3.What payment methods are accepted for ICL8105XUMA2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL8105XUMA2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICL8105XUMA2?

ICL8105XUMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICL8105XUMA2 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 ICL8105XUMA2?

For technical support, including ICL8105XUMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL8105XUMA2 requirements.

6.How does Aetrix verify that ICL8105XUMA2 is sourced from the original manufacturer or authorized distributors?

All ICL8105XUMA2 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 ICL8105XUMA2 meets industry standards.

7.What is the process for return or replacement of ICL8105XUMA2?

All ICL8105XUMA2 units undergo pre-shipment inspection (PSI). If there is an issue with ICL8105XUMA2, 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 ICL8105XUMA2 part is unused and in its original packaging.

Return procedure for ICL8105XUMA2:

1.Submit a request within 90 days.

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

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