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

Infineon Technologies ILD4071XUMA1

Name: ILD4071XUMA1
Brand: Infineon Technologies
SKU: ILD4071XUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ILD4071XUMA1

Manufacturer:: Infineon Technologies

Category:: LED Drivers

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

Datasheet:: ILD4071XUMA1.pdf

Description:: IC LED DRVR RGLTR PWM 700MA 8DSO

Quantity:: RFQ Add To RFQ list

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Inventory:3,452

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Product details

Overview

ILD4071XUMA1 from Infineon Technologies is a 700mA constant-current DC/DC step-down LED driver with integrated NPN power switch, freewheeling diode, current-sense resistor, and PWM dimming engine. It operates from 5V to 40V input, delivers stable LED current via peak-current regulation, and features fixed OFF-time control (typ. 200kHz), open-load diagnosis, and overtemperature protection - used in industrial signage, architectural lighting, and halogen-replacement modules.

For engineers reviewing the ILD4071XUMA1 datasheet, ILD4071XUMA1 pinout, ILD4071XUMA1 application, or ILD4071XUMA1 equivalent, key selection considerations include its integrated power stage, SET-pin current programming, FREQ-pin OFF-time adjustment, ST-pin open-load fault reporting, and thermal shutdown behavior under sustained load.

Technical Context

The ILD4071XUMA1 implements a fixed OFF-time buck controller architecture where switching frequency varies inversely with input voltage due to VREC feedforward. Peak current is set by an external resistor on the SET pin, while t_OFF is determined by an RC network on the FREQ pin - enabling predictable current regulation without loop compensation.

It integrates diagnostic functions including open-load detection via ST pin (open-drain status output) and thermal shutdown at T_j ≥ 150°C. Dimming is supported via both analog (SET pin bias) and PWM modes - internal PWM engine accepts RC timing components on PWMI, or direct µC-driven signals.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	Up to 700mA constant LED current, set via external R_SET on pin 4
Input Voltage Range	5V to 40V - supports wide-range industrial and mains-derived supplies
Switching Frequency	Typ. 200kHz, adjustable via RC network on FREQ pin (pin 6)
Peak Current Sensing	Cycle-by-cycle monitoring using internal sense resistor - no external shunt required
Sleep Mode Current	<2µA - enables ultra-low-power standby in battery-backed lighting systems
Thermal Protection	Automatic shutdown at junction temperature ≥150°C, with hysteresis recovery
Open-Load Detection	Active fault reporting via open-drain ST pin (pin 2) - pulls low on LED string disconnect

Pinout & Package

ILD4071XUMA1 uses the PG-DSO-8 EP thermally enhanced exposed-pad package. The EP pad must be soldered to a GND-connected copper area with thermal vias for effective heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VREC (Pin 1)	Supply input & recirculation node	IC power rail and cathode of integrated freewheeling diode - connects to input capacitor and inductor return
ST (Pin 2)	Diagnostic status output	Open-drain fault indicator - low during open-load condition; requires external pull-up
EN (Pin 3)	Enable control input	Logic-high active enable - device disabled when pulled low or floating
SET (Pin 4)	Current programming input	Connects to external resistor to set peak switch current - directly determines LED output current
PWMI (Pin 5)	PWM dimming interface	Accepts either µC-generated PWM or RC-based self-oscillating dimming signal
FREQ (Pin 6)	OFF-time timing input	RC network sets fixed t_OFF - defines minimum off period and influences frequency vs. V_IN
GND (Pin 7)	Reference ground	System ground reference for all internal circuits and power return path
SW (Pin 8)	Power switch collector	Output node of integrated NPN transistor - connects to inductor and LED anode

Key Features

Feature	Design Value
Integrated Power Stage	NPN switch + freewheeling diode + current-sense resistor - reduces BOM count and layout area
Fixed OFF-Time Control	Stable regulation across input voltage range without complex compensation networks
Two-Mode Dimming	Supports both analog (via SET pin bias) and PWM (internal or external) - enables flexible light-level control
Open-Load Diagnosis	Dedicated ST pin reports LED string failure - critical for safety-critical and maintenance-aware lighting
Thermal Shutdown with Hysteresis	Protects IC under overload or poor heatsinking - resumes operation after cooldown

Applications

Industrial Signage

Architectural Lighting

Use Scenario: High-brightness LED modules mounted on factory floor signage, requiring robust current regulation and fault reporting.

IC Role / Device Role / Timing Role: Constant-current buck controller with open-load detection and thermal protection - ensures visibility and system reliability.

Use Value: Eliminates need for external current-sense amplifier and discrete protection circuitry, reducing board space and cost.

Use Scenario: Indoor linear LED strips in commercial buildings, powered from 24V or 48V DC distribution rails.

IC Role / Device Role / Timing Role: Primary LED current regulator with programmable dimming and stable 200kHz switching - minimizes EMI in shared infrastructure.

Use Value: Integrated FREQ-pin timing allows precise frequency tuning to avoid audible noise and interference with building control systems.

Halogen Replacement Modules

Exit & Navigation Markers

Use Scenario: Retrofit LED lamps replacing 12V/24V halogen bulbs in retail and hospitality environments.

IC Role / Device Role / Timing Role: Step-down constant-current driver with analog dimming support - matches legacy TRIAC-dimmer compatibility via low-frequency PWM.

Use Value: Sleep-mode current <2µA enables zero-power standby - essential for motion-sensor-triggered installations.

Use Scenario: Low-power LED markers on stair edges or emergency exit paths, operating continuously with high reliability.

IC Role / Device Role / Timing Role: Fault-tolerant LED driver with ST-pin diagnostics - provides real-time indication of LED string integrity.

Use Value: Open-load reporting enables predictive maintenance alerts before complete illumination failure occurs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar constant-current LED buck driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8862SP-13	Higher max output current (1.2A), no integrated freewheeling diode - requires external Schottky	Better suited for higher-power single-string designs; lacks open-load diagnosis	Select when >700mA output or lower forward-voltage drop is needed, and ST-pin fault reporting is not required
LM3409HVMM/NOPB	Adjustable frequency via RT pin, external MOSFET drive, no integrated switch or diode	Greater flexibility in power stage selection but increases component count and layout complexity	Prefer for designs requiring >40V input, custom thermal management, or multi-string configurations

Compared with AL8862SP-13 and LM3409HVMM/NOPB, ILD4071XUMA1 offers lowest BOM count and built-in diagnostics at the expense of current headroom and external power-stage flexibility - ideal for compact, cost-sensitive, single-string industrial lighting.

Availability

ILD4071XUMA1 is available at Aetrix Electronics and suitable for industrial signage, architectural lighting, and halogen-replacement modules requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for ILD4071XUMA1 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 electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The ILD4071 belongs to Infineon's dedicated LED driver product line, designed specifically for high-reliability constant-current regulation in non-automotive industrial and commercial lighting - emphasizing integration, thermal robustness, and diagnostic capability.

FAQ

What is the maximum allowable input voltage for ILD4071XUMA1?

The absolute maximum rating for VREC (Pin 1) is 45V, but the functional input range is specified from 5V to 40V. Operation above 40V may trigger undervoltage lockout or reduce reliability; sustained use beyond 40V is not recommended per datasheet Section 4.2.

How is LED current programmed on the ILD4071XUMA1?

LED current is set by connecting a precision resistor between the SET pin (Pin 4) and GND. The peak switch current - and thus regulated LED current - follows I_LED = 1.25V / R_SET, where 1.25V is the internal reference voltage. Typical R_SET values range from 1.8Ω (700mA) to 10Ω (125mA).

Does ILD4071XUMA1 support analog dimming?

Yes - analog dimming is implemented by applying a DC voltage (0–6V) to the SET pin, which scales the internal current reference proportionally. This method avoids PWM-induced EMI and is compatible with resistive or PTC-based thermal derating schemes described in Section 8.1.

What thermal management is required for continuous 700mA operation?

At 700mA and 40V input, junction temperature rise exceeds 100°C without PCB heatspreading. The exposed pad (EP) must be soldered to ≥2 cm² of inner-layer GND copper with ≥6 thermal vias (0.3mm diameter) to maintain T_j ≤125°C per thermal resistance data in Section 4.3 and Package Outline Figure 3.

ILD4071XUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Down (Buck)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 5V

Voltage - Supply (Max):: 40V

Voltage - Output:: -

Current - Output / Channel:: 700mA

Frequency:: 50kHz ~ 300kHz

Dimming:: PWM

Applications:: Lighting

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8

ILD4071XUMA1 FAQ

1.How can I place an order for ILD4071XUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ILD4071XUMA1 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 ILD4071XUMA1 reliable?

The price and inventory of ILD4071XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ILD4071XUMA1 is usually 5 days.

3.What payment methods are accepted for ILD4071XUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ILD4071XUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ILD4071XUMA1?

ILD4071XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ILD4071XUMA1 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 ILD4071XUMA1?

For technical support, including ILD4071XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ILD4071XUMA1 requirements.

6.How does Aetrix verify that ILD4071XUMA1 is sourced from the original manufacturer or authorized distributors?

All ILD4071XUMA1 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 ILD4071XUMA1 meets industry standards.

7.What is the process for return or replacement of ILD4071XUMA1?

All ILD4071XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with ILD4071XUMA1, 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 ILD4071XUMA1 part is unused and in its original packaging.

Return procedure for ILD4071XUMA1:

1.Submit a request within 90 days.

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

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