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

Infineon Technologies ILD4180

Name: ILD4180
Brand: Infineon Technologies
SKU: ILD4180
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ILD4180

Manufacturer:: Infineon Technologies

Category:: LED Drivers

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

Datasheet:: ILD4180.pdf

Description:: SWITCHING REGULATOR

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

ILD4180 from Infineon Technologies is a 1.8A DC/DC step-down LED driver IC with integrated power switch, operating in buck topology for constant-current LED regulation. It features 370 kHz switching frequency, ±2% output current tolerance at nominal load, and 4.75–45 V input range. Designed for industrial lighting, it delivers stable current to high-brightness LEDs in harsh thermal environments (T_j = −40 °C to +125 °C).

For engineers reviewing the ILD4180 datasheet, ILD4180 pinout, ILD4180 application, or ILD4180 equivalent, key selection criteria include PWM dimming capability, bootstrap gate drive architecture, FB-based current-sense resistor configuration (R_FB = 0.6 V / I_LED), thermal shutdown behavior, and exposed-pad DSO-8 package thermal performance.

Technical Context

The ILD4180 implements a synchronous buck regulator with internal N-channel MOSFET and charge-pump-assisted bootstrap gate driver. Its feedback loop uses a precision 0.6 V reference at the FB pin to regulate LED current via external sense resistor, while COMP pin supports type-II compensation network for loop stability.

It integrates functional safety features including BDS under-voltage lockout (VBDS,off = VBUO + 3.3 V), input UVLO (VS,on = 4.75 V, hysteresis = 150 mV), overtemperature shutdown, and soft-start ramp (500 µs typ.) that disables during PWM dimming to preserve dimming linearity.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.75 V to 45 V - supports wide industrial supply rails including 12 V, 24 V, and 36 V systems without pre-regulation.
Output Current Accuracy	±2% at nominal load - ensures consistent LED brightness and color point across production units and temperature.
Switching Frequency	370 kHz fixed - enables use of compact, low-cost inductors (18–56 µH) and ceramic output capacitors (33–120 µF).
Shutdown Current	100 nA typical - minimizes system standby power in always-on industrial control panels or emergency lighting.
Junction Temperature Range	−40 °C to +125 °C - rated for continuous operation in enclosed enclosures, outdoor luminaires, and factory-floor equipment.
R_DS(on)	500 mΩ max at T_j = 150 °C - defines conduction loss and thermal design margin for 1.8 A continuous LED current.
FB Reference Voltage	0.60 V ±2% - sets LED current via R_FB = 0.6 V / I_LED; enables precise, scalable current programming.

Pinout & Package

Package: PG-DSO-8-27 - thermally enhanced SOIC-8 variant with exposed pad (EP) for direct heatsink connection and low R_thJC = 10 K/W.

Pin/Terminal	Circuit Role	Design Meaning
PWMI	PWM dimming input	Accepts 0–100% duty-cycle logic-level signal; disables soft-start during dimming to maintain timing fidelity.
GND	Power and signal ground reference	Must be low-inductance connection to EP and system ground plane to minimize noise coupling into FB/COMP.
COMP	Loop compensation node	Connects external RC network to stabilize current regulation loop; critical for transient response and EMI suppression.
FB	Current-sense feedback input	Monitors voltage across external R_FB; 0.6 V threshold sets regulated LED current (I_LED = 0.6 V / R_FB).
BDS	Bootstrap supply input	Connects bootstrap capacitor to BUO; supplies gate driver; monitored by UVLO to prevent MOSFET linear-mode operation.
BUO	Integrated switch source terminal	Drives external freewheeling diode cathode and buck inductor; requires short, low-inductance PCB trace.
EN	Enable control input	Active-high logic input; internal pull-down allows default disable; enables full system power gating.
VS	Main supply input	Accepts 4.75–45 V; powers internal circuitry and charge pump; must be decoupled near pin with ≥10 µF ceramic capacitor.
EP	Exposed thermal pad	Electrically connected to GND; must be soldered to large copper pour or heatsink for thermal management (R_thJA = 42 K/W on 2s2p FR4).

Key Features

Feature	Design Value
Integrated 1.8 A power switch	Eliminates external MOSFET and reduces BOM count; R_DS(on) ≤ 500 mΩ ensures <1 W conduction loss at full load.
PWM dimming interface	Direct digital control of LED brightness without analog DAC or external FET; preserves color consistency across dimming range.
Charge-pump assisted bootstrap	Enables reliable gate drive down to VS = 4.75 V and maintains >95% duty cycle capability even at low input-output differential.
Thermal shutdown with auto-restart	Protects against sustained overload or poor heatsinking; restarts after junction cools below safe threshold, avoiding latch-off failure mode.
Green RoHS-compliant packaging	PG-DSO-8-27 meets EU Directive 2011/65/EU; no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE.

Applications

Industrial LED Lighting

Halogen Lamp Replacement

Use Scenario: High-bay fixtures in manufacturing plants with ambient temperatures up to 65 °C and 24 V DC plant power.

IC Role / Device Role / Timing Role: Constant-current buck controller regulating 1.2 A through 12-series white LED string at 36 V output.

Use Value: Maintains ±2% current accuracy over −40 °C to +125 °C junction range, ensuring uniform lumen output and extended LED lifetime.

Use Scenario: Retrofit MR16-style LED modules replacing 20–50 W halogen lamps in retail display cases.

IC Role / Device Role / Timing Role: Step-down current source converting 12 V AC/DC adapter output to 350 mA constant current for single COB LED.

Use Value: 370 kHz switching avoids audible noise; small inductor/capacitor footprint fits tight MR16 form factor.

Outdoor Signal Lighting

Emergency Exit Marking

Use Scenario: Solar-powered pathway markers with wide-input MPPT stage feeding 12–42 V battery bus.

IC Role / Device Role / Timing Role: Buck LED driver powering red indicator LEDs with PWM dimming synchronized to dusk/dawn sensor.

Use Value: 100 nA shutdown current extends battery runtime; UVLO prevents brown-out flicker during low-sun conditions.

Use Scenario: UL 924-compliant exit sign with dual 24 V DC backup and primary mains input.

IC Role / Device Role / Timing Role: Primary LED current controller enabling fail-safe illumination during AC loss via battery-backed VS rail.

Use Value: Integrated thermal shutdown prevents overheating in sealed polycarbonate housing; RoHS compliance meets building code requirements.

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
LM3409HV	External MOSFET required; 1.25 V FB reference; no integrated charge pump; 1 MHz max switching frequency.	Higher board area and component count; better suited for high-frequency, low-inductor designs.	Select when higher switching frequency or discrete FET optimization is needed; not drop-in due to different FB voltage and gate drive architecture.
AL8862	Fixed 500 kHz frequency; 0.21 V FB reference; no charge pump; lower max current (1.2 A); smaller SO-8EP package.	Limited thermal headroom above 1 A; optimized for cost-sensitive residential lighting.	Choose for space-constrained, lower-power (<1 A) indoor applications where 0.21 V sensing improves efficiency at low currents.

Compared with LM3409HV and AL8862, the ILD4180 offers integrated 1.8 A switch, charge-pump-assisted bootstrap for wide input range, and industrial-grade thermal rating - making it optimal for ruggedized, high-current, single-component LED driver designs requiring minimal external components and robust thermal management.

Availability

ILD4180 is available at Aetrix Electronics and suitable for industrial LED lighting, halogen replacement modules, outdoor signal lighting, and emergency exit marking requiring stable component supply and long-term industrial lifecycle support.

Supply support for ILD4180 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 global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The ILD4180 belongs to Infineon's industrial LED driver product line, designed specifically for high-reliability, constant-current DC/DC conversion in demanding thermal and electrical environments - targeting factory automation, infrastructure lighting, and safety-critical signage.

FAQ

What is the recommended external inductor value for ILD4180?

The datasheet specifies an inductor range of 18–56 µH for stable operation. A 33 µH, 2.5 A saturation-current shielded inductor with ≤20 mΩ DCR is recommended for 1.8 A LED loads at 24 V input. Inductor selection directly impacts peak current ripple, thermal rise, and EMI; values outside this range may cause instability or exceed R_DS(on) thermal limits.

How does the ILD4180 handle thermal overload?

When junction temperature exceeds +150 °C, the device initiates thermal shutdown, disabling the power switch and holding EN inactive until T_j drops below +135 °C (typical hysteresis). During recovery, soft-start re-engages to prevent inrush. This behavior is non-latching and fully specified in Absolute Maximum Ratings (T_j = 150 °C) and Functional Range (T_j = 125 °C max continuous).

Can ILD4180 operate in constant-voltage mode?

Yes - by connecting the FB pin to the output via a resistive divider instead of a current-sense resistor, the ILD4180 regulates output voltage with V_OUT = 0.6 V × (1 + R1/R2). The datasheet confirms adjustable output voltage range of 0.6–16 V. However, current-limit protection remains active, and CV mode is secondary to its primary constant-current LED driver function.

What is the role of the charge pump in ILD4180?

The integrated charge pump boosts the bootstrap supply voltage when input voltage is low (near 4.75 V) or when the input-output differential is small, ensuring sufficient gate drive (>10 V) for the internal MOSFET to remain fully enhanced. It automatically disables above VBDS − VBUO = 5 V to reduce quiescent current and switching losses, improving efficiency at higher input voltages.

ILD4180 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Down (Buck)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 4.75V

Voltage - Supply (Max):: 45V

Voltage - Output:: 0.6V ~ 16V

Current - Output / Channel:: 1.8A

Frequency:: 370kHz

Dimming:: PWM

Applications:: Commercial & Industrial Lighting

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8-27

ILD4180 FAQ

1.How can I place an order for ILD4180 through Aetrix?

Please submit a Request for Quotation (RFQ) for ILD4180 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 ILD4180 reliable?

The price and inventory of ILD4180 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ILD4180 is usually 5 days.

3.What payment methods are accepted for ILD4180?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ILD4180 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ILD4180?

ILD4180 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ILD4180 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 ILD4180?

For technical support, including ILD4180 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ILD4180 requirements.

6.How does Aetrix verify that ILD4180 is sourced from the original manufacturer or authorized distributors?

All ILD4180 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 ILD4180 meets industry standards.

7.What is the process for return or replacement of ILD4180?

All ILD4180 units undergo pre-shipment inspection (PSI). If there is an issue with ILD4180, 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 ILD4180 part is unused and in its original packaging.

Return procedure for ILD4180:

1.Submit a request within 90 days.

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

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