TPS92311 Datasheet, PDF (1/19 Pages) Texas Instruments – Off-Line Primary Side Sensing Converter with PFC

TPS92311
May 30, 2012
Off-Line Primary Side Sensing Converter with PFC
General Description
The TPS92311 is an off-line converter specifically designed
to drive high power LEDs for lighting applications. Features
include an integrated 3.75Ω 600V power MOSFET, adaptive
constant on-time control, quasi-resonant switching, and ca-
pable of operating in various topologies via mode selection
pins. The TPS92311 is ideally suited for driving 8W LED loads
and below. Power Factor Correction is inherent if the
TPS92311 is operated in the constant on-time mode with an
adaptive algorithm. Resonant switching allows for a reduced
EMI signature and increased system efficiency. Low external
parts count is realized with its simplified and high level of in-
tegration. The control algorithm of TPS92311 adjusts the on
time with reference to the primary side inductor peak current
and secondary side inductor discharge time dynamically, the
response time of which is set by an external capacitor. Other
supervisory features of the TPS92311 include cycle-by-cycle
primary side inductor current limit, VCC under-voltage lock-
out, output over-voltage protection and thermal shutdown.
The TPS92311 is available in 16–pin narrow SOIC package.
Features
■ ^{Integrated 600V power MOSFET}
■ ^{Regulates LED current without secondary side sensing}
■ ^{Adaptive ON-time control with inherent PFC}
■ ^{Critical-Conduction-Mode (CRM) with Zero-Current}
Detection (ZCD) for valley switching
■ ^{Programmable switch turn ON delay}
■ ^{Programmable Constant ON-Time (COT) and Peak}
Current Control
■ ^{Over-temperature protection}
Applications
■ ^{LED Lamps: A19 (E26/27, E14), PAR30/38, GU10}
■ ^{Solid State Lighting}
Typical Application
FIGURE 1.
© 2012 Texas Instruments Incorporated 301880 SNVS811
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