Texas Instruments UC2871NG4
- Part Number:
- UC2871NG4
- Manufacturer:
- Texas Instruments
- Ventron No:
- 3260381-UC2871NG4
- Description:
- IC FLUORESCENT LAMP DRIVR 18DIP
- Datasheet:
- UC1871, 2871, 3871
Description
The UC1871 family of ICs is designed for efficient fluorescent lamp control. It features an integrated PWM controller for additional power supply requirements, such as LCD displays. When disabled, the IC consumes only 1μA, providing a true disconnect function for battery-powered systems.
The switching frequency of all outputs is synchronized to the resonant frequency of an external passive network, enabling Zero Voltage Switching (ZVS) on the Push-Pull drivers. Soft-start and open lamp detection circuitry minimize component stress. Open lamp detection occurs at the end of a soft-start cycle.
The Buck controller provides smooth duty cycle control up to 100%, while the flyback controller ensures a maximum duty cycle of 95%. Other features include a precision 1% reference, undervoltage lockout, flyback current limit, and accurate minimum and maximum frequency control.
Features
1μA ICC when disabled
PWM control for LCD supply
Zero Voltage Switched (ZVS) on Push-Pull drivers
Open lamp detect circuitry
4.5V to 20V operation
Non-saturating transformer topology
Smooth 100% duty cycle on Buck PWM and 0% to 95% on Flyback PWM
Applications
Fluorescent lamp control
LCD display power supplies
Battery-powered systems
The UC1871 family of ICs is designed for efficient fluorescent lamp control. It features an integrated PWM controller for additional power supply requirements, such as LCD displays. When disabled, the IC consumes only 1μA, providing a true disconnect function for battery-powered systems.
The switching frequency of all outputs is synchronized to the resonant frequency of an external passive network, enabling Zero Voltage Switching (ZVS) on the Push-Pull drivers. Soft-start and open lamp detection circuitry minimize component stress. Open lamp detection occurs at the end of a soft-start cycle.
The Buck controller provides smooth duty cycle control up to 100%, while the flyback controller ensures a maximum duty cycle of 95%. Other features include a precision 1% reference, undervoltage lockout, flyback current limit, and accurate minimum and maximum frequency control.
Features
1μA ICC when disabled
PWM control for LCD supply
Zero Voltage Switched (ZVS) on Push-Pull drivers
Open lamp detect circuitry
4.5V to 20V operation
Non-saturating transformer topology
Smooth 100% duty cycle on Buck PWM and 0% to 95% on Flyback PWM
Applications
Fluorescent lamp control
LCD display power supplies
Battery-powered systems
Texas Instruments UC2871NG4 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments UC2871NG4.
- MountThrough Hole
- Mounting TypeThrough Hole
- Package / Case18-DIP (0.300, 7.62mm)
- Number of Pins18
- Weight1.206102g
- Operating Temperature-25°C~85°C
- PackagingTube
- JESD-609 Codee4
- Pbfree Codeyes
- Part StatusObsolete
- Moisture Sensitivity Level (MSL)1 (Unlimited)
- Number of Terminations18
- ECCN CodeEAR99
- Terminal FinishNickel/Palladium/Gold (Ni/Pd/Au)
- HTS Code8542.39.00.01
- SubcategorySwitching Regulator or Controllers
- TechnologyBIPOLAR
- Voltage - Supply4.5V~20V
- Terminal PositionDUAL
- Number of Functions1
- Terminal Pitch2.54mm
- Frequency57kHz~78kHz
- Base Part NumberUC2871
- Pin Count18
- Operating Supply Voltage9V
- Input Voltage-Nom5V
- Operating Supply Current8mA
- Nominal Supply Current15mA
- Input Voltage (Min)4.5V
- Control ModeCURRENT-MODE
- Output Current-Max0.1A
- Input Voltage (Max)20V
- Control TechniqueRESONANT CONTROL
- Switcher ConfigurationPUSH-PULL
- DimmingNo
- Height4.57mm
- Length22.48mm
- Width6.35mm
- RoHS StatusROHS3 Compliant
- Lead FreeLead Free
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