UC2871NG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The UC2871NG4 is a current-mode resonant fluorescent lamp controller and driver IC from Texas Instruments with a 4.5 V to 20 V input range and multi-voltage support at 5 V, 9 V, 12 V, 15 V, and 18 V. It integrates resonant control for efficient lamp regulation in compact CCFL ballast designs. Available in an 18-pin PDIP package, RoHS-compliant and lead-free.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 18
- Lifecycle
- OBSOLETE
- Datasheet
- UC2871NG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -25.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode resonant control delivers stable, efficient fluorescent lamp regulation with cycle-by-cycle peak current limiting
- Wide 4.5 V to 20 V multi-voltage operation (5 V, 9 V, 12 V, 15 V, 18 V) supports diverse power supply architectures
- Integrated resonant converter control reduces external component count in CCFL ballast and lamp driver designs
- 18-pin PDIP package enables straightforward through-hole prototyping and simplified lab evaluation of ballast circuits
Applications
The UC2871NG4 is used as the primary control IC in resonant fluorescent lamp ballasts for CCFL backlighting in LCD monitors, industrial HMI displays, and medical imaging equipment where precise lamp current control and dimming are essential. Its wide multi-voltage supply compatibility allows integration into systems powered by 5 V logic rails, 12 V automotive supplies, or 18 V industrial DC buses without additional regulation. The device also finds application in office equipment, photocopier lamp assemblies, and architectural lighting controllers requiring stable discharge lamp regulation.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | FLUORESCENT LIGHT CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | RESONANT CONTROL |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | R-PDIP-T18 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP18,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 12mA |
| Surface Mount | NO |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 78kHz |
| Technology | BIPOLAR |
| Temperature Grade | OTHER |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC2871NG4:
Controller, Current-mode, 0.1A, 78kHz Switching Freq-Max, BIPolar, PDIP18
Frequently Asked Questions
What control technique does the UC2871NG4 use to regulate fluorescent lamps?
The UC2871NG4 uses current-mode resonant control to regulate fluorescent lamp operation. Resonant control drives the lamp through a resonant LC tank circuit, enabling zero-voltage or zero-current switching of the power transistors to minimize switching losses. The current-mode feedback loop monitors lamp current cycle by cycle, providing fast transient response and inherent protection against overcurrent conditions in the ballast circuit.
What supply voltages does the UC2871NG4 support?
The UC2871NG4 operates from a minimum of 4.5 V to a maximum of 20 V, with listed nominal voltage points of 5 V, 9 V, 12 V, 15 V, and 18 V. This multi-voltage flexibility allows the device to be powered from standard 5 V logic supplies, 12 V automotive or desktop PC power rails, 15 V regulated supplies, or 18 V industrial DC buses, making it widely adaptable across consumer, automotive, and industrial fluorescent lamp control applications.
What package does the UC2871NG4 come in and what does the NG4 suffix indicate?
The UC2871NG4 is housed in an 18-pin Plastic Dual In-line Package (PDIP), JESD-30 code R-PDIP-T18. The 'NG4' suffix in Texas Instruments' naming convention designates a specific production packaging variant. The JESD-609 code e4 confirms that the device is RoHS-compliant and manufactured with lead-free solder terminations suitable for modern assembly processes.
Is the UC2871NG4 RoHS-compliant and lead-free?
Yes, the UC2871NG4 carries a Pb-free designation and JESD-609 code e4, confirming full RoHS compliance and lead-free construction. Its solder terminations are manufactured without lead, making the device compliant with the European Union RoHS directive and equivalent international environmental standards for hazardous substances in electrical and electronic equipment.
What is the difference between the UC2871NG4 and UC3871 fluorescent lamp controllers?
The UC2871 and UC3871 series share the same functional architecture for resonant fluorescent lamp control, but differ in their operating temperature ranges. The UC2871 is typically rated for industrial-grade temperatures (commonly -40°C to +85°C), while the UC3871 is rated for commercial-grade temperatures (0°C to +70°C). Both series provide identical pinout and electrical operation, so designers can swap between them based on the required environmental operating range of their application.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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