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

NXP Semiconductors SSL2102T/N1,518

Name: SSL2102T/N1,518
Brand: NXP Semiconductors
SKU: SSL2102T/N1,518
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SSL2102T/N1,518

Manufacturer:: NXP Semiconductors

Category:: LED Drivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: SSL2102T/N1,518.pdf

Description:: IC LED DRIVER OFFL TRIAC 2A 20SO

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Product details

Overview

SSL2102T/N1,518 from NXP Semiconductors is a fully integrated dimmable LED driver IC for phase-cut dimmer compatibility, featuring an internal 600 V DMOS power switch, valley-switching control, and dual bleeder circuitry (strong/weak) for TRIAC latching and hold-current maintenance. It delivers up to 25 W in flyback or buck topologies directly from rectified mains, with thermal shutdown, overcurrent, short-winding, and demagnetization protection.

For engineers reviewing the SSL2102T/N1,518 datasheet, SSL2102T/N1,518 pinout, SSL2102T/N1,518 application, or SSL2102T/N1,518 equivalent, this page provides verified technical context, SO20 pin mapping, real-world dimming curve optimization down to 1 %, valley-switching timing behavior at 200–800 kHz ringing frequencies, and design-meaningful specifications including R_DS(on) = 6.5 Ω (T_j = 25 °C), V_DRAIN = 600 V, f_osc = 10–200 kHz, and OTP trip at 160 °C.

Technical Context

The SSL2102T/N1,518 implements on-time mode control with frequency reduction via BRIGHTNESS pin voltage (0.5–3 V), enabling logarithmic dimming down to 1 %. Its oscillator uses exponential RC discharge (pins RC/RC2) for constant gain across duty factor range, unlike linear sawtooth PWM systems.

Valley switching is achieved by detecting drain voltage minima after secondary stroke termination, with valley recognition sensitivity ≥100 V/μs and switch-on delay ≤150 ns. Demagnetization detection occurs at AUX pin with 50–150 mV threshold and 1.0–2.0 μs transformer ringing suppression.

Key Specifications

Parameter	Value and Actual Design Meaning
R_DS(on)	6.5 Ω at T_j = 25 °C - enables low conduction loss in 25 W LED drivers with internal 600 V DMOS switch
V_DRAIN	600 V max - supports direct operation from rectified 230 VAC mains without external HV buffer
f_osc	10–200 kHz - adjustable via RC/RC2 network; enables optimized efficiency vs. EMI trade-off
T_OTP	160 °C trip with 2 °C hysteresis - provides precise thermal lumen management and safe shutdown
Dimming Range	1 % minimum brightness - enabled by logarithmic correction and valley-switching stability at low duty factors
V_CC Range	8.5–40 V - allows self-start from rectified mains and seamless handover to auxiliary winding supply
Short-Winding Protection	1.5 V threshold on SOURCE pin - detects secondary diode shorts or primary winding faults within 185 ns

Pinout & Package

SSL2102T/N1,518 is housed in a thermally enhanced SO20 wide-body package (SOT163-1), 7.5 mm body width, with 8 dedicated thermal leads (pins 2, 3, 6, 7, 14, 16, 17, 18, 19) for PCB copper heat sinking.

Pin/Terminal	Circuit Role	Design Meaning
SBLEED (1)	Strong bleeder switch drain	Provides zero-cross reset current for TRIAC dimmers; activates below 52 V threshold
GND (2,3,6,7,14,16,17,18,19)	Power and signal ground	9 ground pins maximize thermal dissipation and reduce noise coupling in high-dv/dt SMPS
WBLEED (4)	Weak bleeder switch drain	Maintains dimmer hold current; controlled by ISENSE voltage thresholds (−100 mV / −250 mV)
VCC (5)	Internal supply input	Accepts 8.5–40 V; starts from rectified mains, transitions to auxiliary winding for >85 % efficiency
BRIGHTNESS (8)	Dimming control input	0.5–3 V analog input sets oscillator frequency reduction ratio for logarithmic dimming curve
RC / RC2 (9,10)	Oscillator timing nodes	Exponential RC discharge enables stable low-duty operation; C ≤ 1 nF, R ≤ 220 kΩ
PWMLIMIT (11)	Duty cycle regulator	0.45–3 V input sets 0–75 % duty factor; used for thermal lumen management and precision current control
ISENSE (12)	Weak bleeder current sense	−100 mV / −250 mV thresholds enable adaptive weak bleeder activation during dimmer conduction
AUX (13)	Demagnetization detection	Monitors transformer auxiliary winding to terminate secondary stroke and trigger valley switching
SOURCE (15)	DMOS source terminal	Connects to external current-sense resistor for OCP (0.5 V threshold) and SWP (1.5 V threshold)
DRAIN (20)	DMOS drain / start-up node	600 V rated; supplies start-up current from rectified mains and senses valley for zero-voltage switching

Key Features

Feature	Design Value
Natural dimming curve down to 1 %	Logarithmic correction via BRIGHTNESS pin ensures perceptually linear light output across full dimming range
Valley switching with <150 ns delay	Reduces switch-on losses by triggering primary stroke at drain voltage minima, validated at 200–800 kHz ringing
Dual bleeder architecture (SBLEED/WBLEED)	Enables interoperability with leading- and trailing-edge dimmers by separately managing TRIAC latching and hold current
Integrated VCC generation	Eliminates external startup circuitry; supports seamless transition from rectified mains to auxiliary winding supply
Thermal-enhanced SO20 package	9 ground pins and wide-body layout reduce R_th(j-a) to 62 °C/W on 2-layer 70 μm Cu PCB, enabling 25 W operation

Applications

GU10/E27 Retrofit Lamps	LED Downlights & Spots
Use Scenario: Replacing incandescent bulbs in residential dimmable fixtures using standard TRIAC wall dimmers. IC Role / Device Role / Timing Role: Primary SMPS controller with integrated 600 V switch, valley detection, and dual-bleeder dimmer interface. Use Value: Enables flicker-free dimming from 1 % to 100 % without external bleeder resistors or auxiliary controllers.	Use Scenario: High-efficiency directional lighting in commercial ceilings and retail displays requiring smooth dimming and thermal stability. IC Role / Device Role / Timing Role: Flyback LED driver with thermal lumen management via PWMLIMIT pin and OTP shutdown at 160 °C. Use Value: Maintains consistent lumen output over temperature while meeting IEC 61000-3-2 harmonic limits via valley switching.
LED Modules for Retail Displays	Dimmable SSL Systems ≤25 W
Use Scenario: Compact, high-CRI LED modules mounted in glass display cases where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Buck-mode LED driver with internal switch, RC-based frequency tuning, and demagnetization sensing at AUX pin. Use Value: Reduces bill-of-materials by integrating power switch, bleeder drivers, and protection logic in SO20 package.	Use Scenario: General-purpose dimmable LED lighting solutions for industrial signage, architectural accent lighting, and OEM lighting engines. IC Role / Device Role / Timing Role: Universal LED driver supporting both flyback and buck topologies with programmable dimming curve and thermal foldback. Use Value: Single IC replaces discrete driver + controller + protection circuits, accelerating time-to-market for ≤25 W designs.

GU10/E27 Retrofit Lamps

LED Downlights & Spots

Use Scenario: Replacing incandescent bulbs in residential dimmable fixtures using standard TRIAC wall dimmers.

IC Role / Device Role / Timing Role: Primary SMPS controller with integrated 600 V switch, valley detection, and dual-bleeder dimmer interface.

Use Value: Enables flicker-free dimming from 1 % to 100 % without external bleeder resistors or auxiliary controllers.

Use Scenario: High-efficiency directional lighting in commercial ceilings and retail displays requiring smooth dimming and thermal stability.

IC Role / Device Role / Timing Role: Flyback LED driver with thermal lumen management via PWMLIMIT pin and OTP shutdown at 160 °C.

Use Value: Maintains consistent lumen output over temperature while meeting IEC 61000-3-2 harmonic limits via valley switching.

LED Modules for Retail Displays

Dimmable SSL Systems ≤25 W

Use Scenario: Compact, high-CRI LED modules mounted in glass display cases where space and thermal headroom are constrained.

IC Role / Device Role / Timing Role: Buck-mode LED driver with internal switch, RC-based frequency tuning, and demagnetization sensing at AUX pin.

Use Value: Reduces bill-of-materials by integrating power switch, bleeder drivers, and protection logic in SO20 package.

Use Scenario: General-purpose dimmable LED lighting solutions for industrial signage, architectural accent lighting, and OEM lighting engines.

IC Role / Device Role / Timing Role: Universal LED driver supporting both flyback and buck topologies with programmable dimming curve and thermal foldback.

Use Value: Single IC replaces discrete driver + controller + protection circuits, accelerating time-to-market for ≤25 W designs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dimmable LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NCL30000DR2G	Fixed-frequency quasi-resonant controller; no integrated power switch; requires external MOSFET	Higher BOM count but greater flexibility in power level scaling beyond 25 W	Select when designing >25 W or needing variable switching frequency for EMI tuning
Infineon ICE2QS03G	QR controller with integrated 650 V switch; no built-in bleeder circuitry; requires external bleeder network	Lacks native TRIAC dimmer support; needs additional components for dimmer interoperability	Select when cost-sensitive and dimmer compatibility can be added externally

Compared with NCL30000DR2G and ICE2QS03G, SSL2102T/N1,518 offers lower system-level component count due to integrated 600 V switch and dual-bleeder circuitry, enabling faster qualification for retrofit lamp certifications like ENERGY STAR and IEC 62612.

Availability

SSL2102T/N1,518 is available at Aetrix Electronics and suitable for GU10 retrofit lamps, LED downlights, retail display modules, and dimmable SSL systems requiring stable component supply, long-lifecycle support, and compliance with IEC 61000-3-2 Class C harmonic limits.

Supply support for SSL2102T/N1,518 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The SSL2102T/N1,518 belongs to NXP's GreenChip LED driver family, designed specifically for energy-efficient, dimmable solid-state lighting with native phase-cut dimmer interoperability and thermal-aware lumen regulation.

FAQ

What is the maximum output power supported by the SSL2102T/N1,518?

The SSL2102T/N1,518 is rated for LED lighting applications up to 25 W, as confirmed in the official NXP product data sheet Rev. 1.1. This rating applies to both flyback and buck topologies when operated within specified ambient temperature (−40 °C to +100 °C) and thermal PCB layout guidelines. The internal 600 V DMOS switch and 6.5 Ω R_DS(on) enable efficient operation at this power level without external high-voltage components. SSL2102T/N1,518 achieves this with integrated valley switching and thermal protection to maintain reliability.

Does the SSL2102T/N1,518 support both leading-edge and trailing-edge dimmers?

Yes, the SSL2102T/N1,518 supports both leading-edge (TRIAC) and trailing-edge (electronic low-voltage) dimmers through its dual-bleeder architecture. The strong bleeder (SBLEED pin) ensures reliable TRIAC latching and zero-cross reset, while the weak bleeder (WBLEED pin) maintains hold current during conduction. This is validated by NXP's dimmer interoperability testing across major dimmer brands and documented in Section 8.4 of the SSL2102T/N1,518 datasheet. SSL2102T/N1,518 does not require external bleeder resistors to achieve this compatibility.

How does valley switching work in the SSL2102T/N1,518 and what is its benefit?

Valley switching in the SSL2102T/N1,518 is implemented by detecting the minimum drain voltage after secondary stroke termination using the DRAIN pin. The IC waits for the drain ringing waveform to reach its first valley before initiating the next primary stroke, reducing switch-on losses. This is confirmed by measured phase curves showing exact valley switching at 480 kHz and ≤33° offset at 200 kHz. The benefit is higher efficiency-especially at light loads-and lower EMI. SSL2102T/N1,518 achieves this with built-in valley recognition circuitry and <150 ns switch-on delay.

What thermal management features does the SSL2102T/N1,518 include?

The SSL2102T/N1,518 includes junction temperature monitoring with overtemperature protection (OTP) that trips at 160 °C ±10 °C and resets with 2 °C hysteresis. It also uses 9 ground pins (pins 2, 3, 6, 7, 14, 16, 17, 18, 19) in its SO20 package for direct PCB copper heat sinking, achieving 62 °C/W thermal resistance on a 2-layer board. Thermal lumen management is supported via the PWMLIMIT pin, allowing dynamic current reduction before OTP activation. SSL2102T/N1,518 integrates all these functions without external sensors or circuitry.

Can the SSL2102T/N1,518 operate in buck topology, and what are the key design considerations?

Yes, the SSL2102T/N1,518 explicitly supports buck topology per NXP's General Description and Application Information sections. Key design considerations include using the SOURCE pin as the low-side current sense node, configuring the AUX pin for demagnetization detection via a coupled winding, and ensuring the DRAIN pin connects to input DC bus (not AC mains). The IC's 600 V DRAIN rating and valley switching remain functional in buck mode. SSL2102T/N1,518 requires no topology-specific configuration changes-only external passive component selection differs between buck and flyback implementations.

SSL2102T/N1,518 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: GreenChip™

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Type:: AC DC Offline Switcher

Topology:: Flyback, Step-Down (Buck)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 8.5V

Voltage - Supply (Max):: 40V

Voltage - Output:: -

Current - Output / Channel:: 2A (Switch)

Frequency:: 100kHz

Dimming:: Triac

Applications:: -

Operating Temperature:: -40°C ~ 100°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

SSL2102T/N1,518 FAQ

1.How can I place an order for SSL2102T/N1,518 through Aetrix?

Please submit a Request for Quotation (RFQ) for SSL2102T/N1,518 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 SSL2102T/N1,518 reliable?

The price and inventory of SSL2102T/N1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL2102T/N1,518 is usually 5 days.

3.What payment methods are accepted for SSL2102T/N1,518?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL2102T/N1,518 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SSL2102T/N1,518?

SSL2102T/N1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SSL2102T/N1,518 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 SSL2102T/N1,518?

For technical support, including SSL2102T/N1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL2102T/N1,518 requirements.

6.How does Aetrix verify that SSL2102T/N1,518 is sourced from the original manufacturer or authorized distributors?

All SSL2102T/N1,518 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 SSL2102T/N1,518 meets industry standards.

7.What is the process for return or replacement of SSL2102T/N1,518?

All SSL2102T/N1,518 units undergo pre-shipment inspection (PSI). If there is an issue with SSL2102T/N1,518, 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 SSL2102T/N1,518 part is unused and in its original packaging.

Return procedure for SSL2102T/N1,518:

1.Submit a request within 90 days.

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

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