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NXP Semiconductors SSL21083AT/1,118
- Part No.:
- SSL21083AT/1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SSL21083AT/1,118.pdf
- Description:
- IC LED DRIVER OFFLINE 1A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
SSL21083AT/1,118 from NXP Semiconductors is a high-voltage LED driver IC for non-dimmable mains-powered lighting, integrating a 600 V (DC) MOSFET and operating in boundary conduction mode (BCM) buck topology. It delivers ±5 % LED current accuracy, supports direct PWM current regulation, and achieves up to 95 % efficiency in compact PCB designs targeting 230 V AC input.
For engineers reviewing the SSL21083AT/1,118 datasheet, SSL21083AT/1,118 pinout, SSL21083AT/1,118 application, or SSL21083AT/1,118 equivalent, this page provides verified technical context, validated pin functions, confirmed protection features (UVLO, OCP, OTP, OSP), and real-world design implications for fixed-current LED lamp implementations.
Technical Context
The SSL21083AT/1,118 implements a peak-current-controlled BCM buck converter with valley detection on the DRAIN pin to enable zero-voltage switching and minimize capacitive losses. Its internal 600 V MOSFET operates with RDS(on) = 5 Ω (Tj = 25 °C) and supports dV/dt-based self-supply via the DVDT pin.
Startup is enabled by an internal HV current source (350 µA typical), followed by dV/dt supply operation; VCC regulation includes hysteresis (VCC(startup) = 12 V, VCC(stop) = 9 V) and an internal clamp limiting VCC to 14 V. Protection logic includes latched SWP/OSP and safe-restart OTP/LED thermal control via the NTC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRAIN max | 600 V DC - enables direct interface with 230 V AC rectified input without external HV switch |
| RDS(on) | 5 Ω @ 25 °C - determines conduction loss and thermal dissipation in primary-side switching |
| fconv | 100 kHz - sets inductor size and EMI profile; fixed-frequency operation simplifies filter design |
| ILED accuracy | ±5 % - ensures consistent luminous output across production batches without LED binning |
| VCC range | 8–14 V - supports flexible auxiliary supply schemes including dV/dt coupling and external bias |
| Protection suite | UVLO, OCP, OTP, OSP, brownout - eliminates need for discrete protection circuitry in Class II lighting |
| NTC function | Configurable LED thermal foldback or PWM dimming input - single-pin dual-use reduces BOM count |
Pinout & Package
SSL21083AT/1,118 is housed in an SO8 package (SOT96-1), 3.9 mm body width, with exposed pad not electrically connected. Thermal resistance is 72 K/W (JEDEC 2s2p) and 142 K/W (free air, 2-layer 2 cm × 3 cm PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HV | High-voltage startup supply | Accepts up to 600 V DC; powers internal current source during startup before dV/dt supply engages |
| SOURCE | MOSFET source node / current sense | Connects to external sense resistor; voltage threshold (500 mV typ.) triggers OCP and SWP |
| VCC | Internal regulator input | Supplied by dV/dt rectifier or external source; clamped at 14 V; controls UVLO and restart behavior |
| NTC | Thermal/PWM control input | Accepts NTC thermistor for LED temperature foldback or digital signal for PWM current regulation |
| DVDT | AC-coupled supply input | Rectifies voltage swing from drain node to generate VCC; eliminates need for auxiliary winding |
| GND | Power and signal reference | Pins 6 and 7 are internally bonded - must be connected to common ground plane for noise immunity |
| DRAIN | MOSFET drain terminal | Switches 600 V DC; valley detection circuitry monitors oscillation for ZVS timing |
Key Features
| Feature | Design Value |
|---|---|
| Boundary conduction mode (BCM) control | Eliminates reverse recovery losses in freewheel diode and enables ZCS turn-on, reducing EMI and improving efficiency |
| Integrated 600 V MOSFET | Removes need for external HV switch and gate driver, cutting BOM count and layout area in 230 V AC applications |
| Valley detection on DRAIN pin | Reduces switching losses by triggering MOSFET turn-on at voltage minima, lowering dV/dt stress and heat generation |
| Direct PWM current regulation | Enables digital brightness control without external dimming circuitry-NTC pin accepts logic-level PWM signals |
| Latched Output Short Protection (OSP) | Halts operation during LED string short; requires power cycle reset-prevents thermal runaway in fault conditions |
| No LED forward voltage binning required | Fixed-current regulation maintains consistent light output across varying VF LEDs, simplifying manufacturing and sourcing |
Applications
| General Lighting Lamps | Commercial Downlights |
|---|---|
|
Use Scenario: Compact A19 or GU10 LED retrofit lamps powered directly from 230 V AC mains with no dimming capability. IC Role / Device Role / Timing Role: Primary-side constant-current controller implementing BCM buck conversion with integrated 600 V MOSFET and valley-synchronized switching. Use Value: Enables <12 mm board height, ≤15 component count, and >90 % system efficiency without auxiliary winding or Schottky diode. |
Use Scenario: Fixed-output downlight modules for office ceilings operating from 230 V AC with thermal derating requirements. IC Role / Device Role / Timing Role: LED current regulator with NTC-based thermal foldback and brownout protection to maintain safe junction temperature under line sag. Use Value: Eliminates need for separate thermal sensor IC and analog comparator; single NTC resistor implements both safety shutdown and gradual dimming. |
| Industrial Panel Lights | Outdoor Wall Packs |
|
Use Scenario: IP65-rated panel-mounted indicator lights in factory environments with wide ambient temperature range (−40 °C to +85 °C). IC Role / Device Role / Timing Role: Robust LED driver with latched OSP and safe-restart OTP, operating in unregulated industrial mains with voltage transients. Use Value: Withstands 600 V drain stress and −40 °C cold start; internal clamp and UVLO prevent false triggering during brownouts. |
Use Scenario: Outdoor wall-mounted fixtures exposed to 230 V AC mains with seasonal voltage variation and humidity-induced leakage paths. IC Role / Device Role / Timing Role: Fault-tolerant driver with short-winding protection (SWP) and output short protection (OSP) to survive insulation degradation. Use Value: SWP detects partial winding shorts before catastrophic failure; OSP prevents overheating during moisture-induced LED string shorts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SSL21083T/1,118 | Includes Short-Winding Protection (SWP); same SO8 package and 600 V MOSFET | Required where transformer or inductor winding integrity is uncertain (e.g., low-cost magnetics) | Select SSL21083AT/1,118 when SWP is unnecessary to reduce cost; choose SSL21083T/1,118 for enhanced magnetic fault coverage |
| MP4008GN-Z | 650 V MOSFET, 130 kHz fsw, no integrated dV/dt supply - requires external bias network | Better suited for designs needing higher switching frequency or tighter EMI control | SSL21083AT/1,118 offers lower BOM count and simpler startup; MP4008GN-Z provides higher fsw headroom for smaller magnetics |
Compared with SSL21083T/1,118, SSL21083AT/1,118 removes SWP to reduce cost and complexity in stable magnetic designs; versus MP4008GN-Z, it integrates dV/dt supply and valley detection, eliminating external bias components but fixing fsw at 100 kHz.
Availability
SSL21083AT/1,118 is available at Aetrix Electronics and suitable for general lighting lamps, commercial downlights, industrial panel lights, and outdoor wall packs requiring stable component supply and long-lifecycle support.
Supply support for SSL21083AT/1,118 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 markets.
The SSL2108x family was designed specifically for cost-sensitive, non-dimmable LED lighting applications requiring high integration, minimal external components, and robust operation across 100–230 V AC inputs.
FAQ
What is the maximum input voltage the SSL21083AT/1,118 can handle?
The SSL21083AT/1,118 integrates a 600 V (DC) MOSFET with VDRAIN rating of 600 V, enabling direct connection to rectified 230 V AC mains (peak ~325 V). Its HV pin tolerates up to 600 V DC, and the DRAIN pin withstands 600 V DC under all operating conditions per absolute maximum ratings.
Does the SSL21083AT/1,118 require an external Schottky diode in buck configuration?
No. The SSL21083AT/1,118 uses zero-current switching (ZCS) in boundary conduction mode, eliminating reverse recovery losses in the freewheel diode. This allows use of low-cost standard PN diodes instead of Schottky diodes, reducing BOM cost and thermal stress.
How does the SSL21083AT/1,118 achieve LED current accuracy of ±5 %?
The SSL21083AT/1,118 employs cycle-by-cycle peak current control referenced to a precision 500 mV threshold on the SOURCE pin. Combined with valley detection timing and stable internal references, this delivers ±5 % LED current accuracy across line, load, and temperature without trimming or calibration.
Can the SSL21083AT/1,118 be used with 120 V AC input?
Yes. Although optimized for 230 V AC, the SSL21083AT/1,118 supports 100 V and 120 V AC inputs per datasheet Table 3. Design adjustments include larger inductor value and adjusted sense resistor to maintain target LED current and BCM operation at lower input voltage.
What protection features are included in the SSL21083AT/1,118?
The SSL21083AT/1,118 includes UnderVoltage LockOut (UVLO), Leading-Edge Blanking (LEB), OverCurrent Protection (OCP), Output Short Protection (OSP), Brownout protection, and Internal OverTemperature Protection (OTP). It omits Short-Winding Protection (SWP), which is present only in the SSL21083T variant.
SSL21083AT/1,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- GreenChip™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 16V
- Voltage - Output:
- 600V
- Current - Output / Channel:
- 1A (Switch)
- Frequency:
- -
- Dimming:
- -
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SSL21083AT/1,118 FAQ
1.How can I place an order for SSL21083AT/1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SSL21083AT/1,118 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 SSL21083AT/1,118 reliable?
The price and inventory of SSL21083AT/1,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL21083AT/1,118 is usually 5 days.
3.What payment methods are accepted for SSL21083AT/1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL21083AT/1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSL21083AT/1,118?
SSL21083AT/1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSL21083AT/1,118 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 SSL21083AT/1,118?
For technical support, including SSL21083AT/1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL21083AT/1,118 requirements.
6.How does Aetrix verify that SSL21083AT/1,118 is sourced from the original manufacturer or authorized distributors?
All SSL21083AT/1,118 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 SSL21083AT/1,118 meets industry standards.
7.What is the process for return or replacement of SSL21083AT/1,118?
All SSL21083AT/1,118 units undergo pre-shipment inspection (PSI). If there is an issue with SSL21083AT/1,118, 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 SSL21083AT/1,118 part is unused and in its original packaging.
Return procedure for SSL21083AT/1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SSL21083AT/1,118 Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
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BCR421UFD-7
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