UC2871DW ,Resonant Fluorescent Lamp DriverMAXIMUM RATINGSNote 1: Currents are positive into, negative out of the specified ter-Analog Inputs ..
UC2872DW ,Resonant Lamp Ballast ControllerMAXIMUM RATINGSAnalog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.3 to +10 ..
UC2872DWG4 ,Resonant Lamp Ballast Controller 16-SOIC -40 to 85FEATURES DESCRIPTION• Controls Different Types of Lamps: The UC3872 is a resonant lamp ballast cont ..
UC2872DWTRG4 ,Resonant Lamp Ballast Controller 16-SOIC -40 to 85+applicationUC1872INFOUC2872availableUC3872Resonant Lamp Ballast Controller
UC2872N , Resonant Lamp Ballast Controller
UC2874DW-1 ,2UC1874-1,-2UC2874-1,-2UC3874-1,-2High Efficiency, Synchronous, Step-down (Buck) Controllers
UM91214B , Tone / Pulse Dialer
UM91214B , Tone / Pulse Dialer
UM91215D , Tone / Pulse Dialer
UM91260B , 10 MEMORY TONE /PULSE DIALER
UM91270/A , 20 MEMORY TONE/PULSE DIALER
UM91270A , 20 MEMORY TONE/PULSE DIALER
UC2871-UC2871DW
Resonant Fluorescent Lamp Driver
BLOCK DIAGRAM 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
The UC1871 Family of IC’s is optimized for highly efficient fluorescent lamp
control. An additional PWM controller is integrated on the IC for applications re-
quiring an additional supply, as in LCD displays. When disabled the IC draws
only 1μA, providing a true disconnect feature, which is optimum for battery
powered systems. The switching frequency of all outputs are synchronized to
the resonant frequency of the external passive network, which provides Zero
Voltage Switching on the Push-Pull drivers.
Soft-Start and open lamp detect circuitry have been incorporated to minimize
component stress. An open lamp is detected on the completion of a soft-start
cycle.
The Buck controller is optimized for smooth duty cycle control to 100%, while
the flyback control ensures a maximum duty cycle of 95%.
Other features include a precision 1% reference, under voltage lockout, flyback
current limit, and accurate minimum and maximum frequency control.
Resonant Fluorescent Lamp Driver
FEATURES DESCRIPTION
