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Infineon Technologies ILD4180XUMA1
- Part No.:
- ILD4180XUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ILD4180XUMA1.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.8A 8DSO
- Quantity:
- Payment:
- Shipping:
Inventory:4,395
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Product details
Overview
ILD4180XUMA1 from Infineon Technologies is a 1.8A DC/DC step-down LED driver IC with integrated power switch, designed for constant-current LED regulation in industrial lighting systems. It operates from 4.75V to 45V input, delivers ±2% output current tolerance at nominal load, features 370 kHz fixed-frequency PWM switching, and supports PWM dimming via dedicated PWMI pin. Used in halogen replacement and outdoor signal lighting where thermal robustness (Tj = −40°C to +125°C) and low shutdown current (100 nA) are critical.
For engineers reviewing the ILD4180XUMA1 datasheet, ILD4180XUMA1 pinout, ILD4180XUMA1 application, or ILD4180XUMA1 equivalent, key selection considerations include buck topology compatibility, FB-based current-sense resistor design (RFB = 0.6 V / ILED), bootstrap capacitor requirements on BDS/BUO, thermal management via exposed pad, and PWM dimming interface timing constraints.
Technical Context
The ILD4180XUMA1 implements a synchronous-buck-derived architecture with an integrated N-channel MOSFET power switch and charge-pump-assisted gate driver. Its feedback loop uses a 0.6 V reference voltage at FB pin, enabling precise constant-current regulation across wide input and load variations.
It integrates multiple protection functions: bootstrap under-voltage lockout (VBDS,off = VBUO + 3.3 V), overtemperature shutdown, input UVLO (VS,on = 4.75 V, hysteresis = 150 mV), and peak current limiting (IBUOC = 2.2–3.6 A). Soft-start ramps VREF over 350–750 µs to limit inrush, and dimming disables soft-start during PWMI modulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.75 V to 45 V - supports 12 V/24 V/36 V industrial rails and wide-line AC-DC outputs. |
| Output Current | Up to 1.8 A - enables direct drive of high-power LED strings without external pass devices. |
| Switching Frequency | 370 kHz - allows use of compact, low-cost inductors (18–56 µH) and ceramic capacitors (33–120 µF). |
| Current Regulation Accuracy | ±2% at nominal load - ensures consistent LED brightness and color point across temperature and line variation. |
| Shutdown Current | 100 nA typical - minimizes system standby power in always-on industrial control panels. |
| Junction Temperature Range | −40 °C to +125 °C - rated for enclosed, high-ambient environments like factory lighting and signage housings. |
| Thermal Resistance (Junction-to-Case) | 10 K/W - requires direct thermal connection of exposed pad to PCB copper pour or heatsink for 1.8 A operation. |
Pinout & Package
ILD4180XUMA1 is housed in PG-DSO-8-27: thermally enhanced 8-pin DSO package with exposed pad (EP) for direct heatsinking. The EP must be soldered to a low-inductance GND plane or external heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWMI (1) | PWM Dimming Input | Accepts 0–5 V logic-level PWM signal; unused pin must be tied to VS to disable dimming. |
| GND (2) | Power Ground Reference | Main return path for power-switch source, feedback, and internal bias currents; connect directly to EP. |
| COMP (3) | Loop Compensation Node | Connect RC network here to stabilize current-regulation loop; values depend on inductor and output capacitance. |
| FB (4) | Current-Sense Feedback Input | Monitors voltage across RFB; sets LED current as ILED = 0.6 V / RFB. |
| BDS (5) | Bootstrap Supply Input | Connects external bootstrap capacitor between BDS and BUO to drive internal MOSFET gate above VS rail. |
| BUO (6) | Buck Switch Output | Drains internal power switch; connects to cathode of freewheeling diode and buck inductor. |
| EN (7) | Enable Control Input | Logic-high (>2 V) enables operation; internal pull-down ensures default disable state. |
| VS (8) | Main Supply Input | Primary input rail (4.75–45 V); powers internal circuitry and supplies charge pump when needed. |
| EP | Exposed Thermal Pad | Electrically connected to GND; mandatory for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switch | N-channel MOSFET with RDS(ON) ≤ 500 mΩ at Tj = 150 °C - eliminates external high-side switch and reduces BOM count. |
| Charge-Pump Gate Driver | Enables full gate drive at low input-output differential (e.g., 12 V input → 10 V LED string) - improves efficiency in low-VOUT applications. |
| Bootstrap UVLO Protection | Turns off power switch if BDS voltage drops below VBUO + 3.3 V - prevents MOSFET linear-mode operation and thermal runaway. |
| Soft-Start Ramp | 500 µs typical VREF ramp (350–750 µs range) - limits inrush current into output capacitor and avoids LED flash at startup. |
| Industrial Temp Rating | Guaranteed operation from −40 °C to +125 °C junction - validated for use in unventilated enclosures and outdoor-rated fixtures. |
Applications
| Industrial Signal Lighting | Halogen Lamp Replacement |
|---|---|
|
Use Scenario: Illuminated exit signs, stairwell markers, and safety wayfinding systems in factories and warehouses. IC Role / Device Role / Timing Role: Constant-current LED driver with PWM dimming for night-mode brightness reduction and thermal derating at elevated ambient temperatures. Use Value: Maintains consistent lumen output and color over 125 °C junction temperature while consuming <100 nA in standby during building-wide power-down. |
Use Scenario: Retrofit LED modules replacing 12–24 VAC halogen lamps in architectural track lighting and display cases. IC Role / Device Role / Timing Role: Buck converter delivering stable 1.8 A current to multi-die COB LEDs, rejecting 10–20 % input ripple from legacy transformers. Use Value: Eliminates need for external current-sense resistors and heat sinks due to integrated switch and 10 K/W RthJC, reducing module footprint by 35 %. |
| Outdoor Commercial Signage | Industrial Control Panel Indicators |
|
Use Scenario: Backlit channel letters and illuminated logos exposed to −40 °C winter cold and solar-heated enclosures up to 85 °C ambient. IC Role / Device Role / Timing Role: Primary LED current regulator with overtemperature shutdown and input UVLO to survive brownouts and cold-start conditions. Use Value: Delivers full 1.8 A output down to −40 °C without derating and sustains operation up to 125 °C junction before thermal shutdown activates. |
Use Scenario: Status indicators on PLC I/O modules, HMI panels, and motor drives requiring long-life, flicker-free illumination. IC Role / Device Role / Timing Role: Low-noise constant-current source synchronized to system enable signals (EN pin) and immune to supply transients on 24 V DC rails. Use Value: Provides ±2 % current accuracy across 4.75–45 V input range, ensuring uniform LED intensity despite factory power bus fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED buck driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HVMM/NOPB | 40 V max input, 1.5 A max output, no integrated switch - requires external MOSFET and separate gate driver. | Lacks integrated power switch and charge pump; less suitable for space-constrained industrial modules. | Prefer when higher input voltage margin (up to 40 V) is required and board area permits discrete FET layout. |
| TPS92630QPWPRQ1 | Automotive-grade AEC-Q100, 65 V input, 1.5 A, integrated switch, but only rated to 105 °C Tj. | Qualified for automotive but lacks industrial temp rating; no charge pump support for low-VOUT operation. | Choose only for transportation-adjacent applications where AEC-Q100 compliance is mandatory and ambient stays ≤ 85 °C. |
Compared with LM3409HVMM/NOPB and TPS92630QPWPRQ1, ILD4180XUMA1 uniquely combines 45 V input, 1.8 A output, 125 °C operation, integrated switch, and charge-pump gate drive-making it optimal for thermally demanding, space-limited industrial LED drivers where reliability trumps automotive qualification.
Availability
ILD4180XUMA1 is available at Aetrix Electronics and suitable for industrial signal lighting, halogen lamp replacement, and outdoor commercial signage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ILD4180XUMA1 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-reliability analog and mixed-signal solutions.
ILD4180XUMA1 belongs to Infineon's industrial LED driver product line, engineered specifically for robust constant-current regulation in harsh-environment lighting where thermal resilience, integration density, and long-term parametric stability are essential.
FAQ
What is the recommended external inductor value for ILD4180XUMA1?
The datasheet specifies an inductor range of 18 µH to 56 µH, with typical selection at 22 µH or 33 µH for 24 V input and 1.8 A output. Inductor saturation current must exceed 2.5 A, and DC resistance should be ≤ 30 mΩ to maintain efficiency and thermal performance at full load.
How is LED current set using the FB pin?
LED current is set by connecting a precision resistor (RFB) between FB and GND. Since the internal reference is 0.6 V, ILED = 0.6 V / RFB. For 1.8 A output, RFB = 0.333 Ω (±1 % tolerance, ≥1 W power rating) is required; layout must minimize trace resistance to preserve accuracy.
Does ILD4180XUMA1 support analog dimming?
No, ILD4180XUMA1 supports only PWM dimming via the PWMI pin. Analog dimming (current scaling via FB voltage adjustment) is not supported-the FB pin is strictly a 0.6 V reference comparator input, and altering its voltage disrupts regulation and triggers fault behavior.
What is the role of the exposed pad (EP) and how should it be connected?
The exposed pad is electrically connected to GND and serves as the primary thermal path. It must be soldered to a large, low-thermal-resistance GND copper pour (≥200 mm²) with ≥6 thermal vias (0.3 mm diameter) to inner GND layers. Failure to do so risks exceeding 125 °C junction temperature at >1.2 A continuous load.
ILD4180XUMA1 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:
- Obsolete
- 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:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-8-27
ILD4180XUMA1 FAQ
1.How can I place an order for ILD4180XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ILD4180XUMA1 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 ILD4180XUMA1 reliable?
The price and inventory of ILD4180XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ILD4180XUMA1 is usually 5 days.
3.What payment methods are accepted for ILD4180XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ILD4180XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ILD4180XUMA1?
ILD4180XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ILD4180XUMA1 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 ILD4180XUMA1?
For technical support, including ILD4180XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ILD4180XUMA1 requirements.
6.How does Aetrix verify that ILD4180XUMA1 is sourced from the original manufacturer or authorized distributors?
All ILD4180XUMA1 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 ILD4180XUMA1 meets industry standards.
7.What is the process for return or replacement of ILD4180XUMA1?
All ILD4180XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with ILD4180XUMA1, 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 ILD4180XUMA1 part is unused and in its original packaging.
Return procedure for ILD4180XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ILD4180XUMA1 Tags
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