TPS92311_14 Datasheet, PDF (1/24 Pages) Texas Instruments – Off-Line Primary Side Sensing Converter with PFC

TPS92311
www.ti.com
SNVS811B – MAY 2012 – REVISED MAY 2013
Off-Line Primary Side Sensing Converter with PFC
Check for Samples: TPS92311
FEATURES
1
•2 Integrated 600V Power MOSFET With Superior
Avalanche Energy Capability
• 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
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 capable 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
integration. 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 lockout, output over-voltage protection
and thermal shutdown. The TPS92311 is available in
16–pin narrow SOIC package.
Typical Application
R₁
D₁
AC
IN
D₄
C_IN
0.1 PF
D₃
R₄
D₂
20Q
D₃
T1 1A 100V
L_P
L_S
C_OUT
LED+
6±7
LED
R₂
L_AUX
*Z₁
R₃
C_ZCD
C_Y1
LED-
*Optional
D_ZCD
C_VCC
C_COMP
TPS92311
SW
SW
SW
SW
NC
NC
ZCD ISNS
GND GND
VIN MODE1
NC _MODE2
COMP DLY
R_ISNS
R_DLY
Figure 1. Typical Application
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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