UC3871QG3 Texas Instruments Integrated Circuit (Plastic Leaded Chip Carrier) In Stock
The UC3871QG3 is a current-mode PWM resonant fluorescent lamp driver controller IC from Texas Instruments operating from 4.5 V to 20 V supply. It provides up to 100 mA output drive current with integrated pulse width modulation control for efficient lamp dimming and regulation. Housed in a 20-pin PLCC package for surface-mount industrial display and lighting applications.
- Manufacturer
- Texas Instruments
- Package
- Plastic Leaded Chip Carrier
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- UC3871QG3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC3871QG3?
- Current-mode PWM control provides inherent cycle-by-cycle peak current limiting for stable fluorescent lamp regulation
- Wide 4.5 V to 20 V input voltage range accommodates diverse power supply environments from battery to mains-derived supplies
- Resonant converter control topology enables high-efficiency lamp driving with reduced EMI and lamp electrode stress
- 20-pin PLCC package (JESD-30 S-PQCC-J20) is suitable for compact surface-mount fluorescent lamp ballast designs
What is UC3871QG3 used for?
The UC3871QG3 is used as the primary control IC in resonant fluorescent lamp ballasts for LCD backlighting in monitors, industrial HMI displays, and signage equipment where precise brightness control is required. Its current-mode PWM architecture efficiently drives cold cathode fluorescent lamps (CCFL) and similar discharge tubes in both single-lamp and multi-lamp configurations. The wide supply voltage range also makes it applicable in 12 V to 20 V automotive and industrial display systems requiring reliable fluorescent lamp regulation.
What are the specifications of UC3871QG3?
| YTEOL | 0 |
| Analog IC - Other Type | FLUORESCENT LIGHT CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | S-PQCC-J20 |
| Number of Functions | 1 |
| Output Current-Max | 0.1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LDCC20,.4SQ |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 12mA |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 78kHz |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Form | J BEND |
| Terminal Pitch | 1.27mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Plastic Leaded Chip Carrier |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the UC3871QG3 datasheet?
UC3871QG3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC3871QG3?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Which supply range should a design reserve for UC3871QG3?
The fetched context lists a 4.5 V to 20 V input range with 5 V nominal operation, so power-rail tolerance should be checked before controller substitution.
How does the output-drive rating affect fluorescent lamp driver selection?
UC3871QG3 provides up to 0.1 A output current in a current-mode PWM controller, supporting gate-drive or control stages used in resonant fluorescent lamp circuits.
Which package detail matters for maintenance or replacement boards?
The part is housed in a 20-pin PLCC style package with JESD-30 code S-PQCC-J20, so socket, footprint, and assembly-clearance checks are required before procurement approval.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit