TPS92314 Datasheet, PDF (1/26 Pages) Texas Instruments – Off-Line Primary Side Sensing Controller with PFC

www.ti.com
TPS92314
TPS92314A
SNVS856B – JUNE 2012 – REVISED MAY 2013
Off-Line Primary Side Sensing Controller with PFC
Check for Samples: TPS92314, TPS92314A
FEATURES
1
•2 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)
• Over Current Limit Options:
– TPS92314: 1.15V
– TPS92314A: 2.0V
• Advanced Over Current and Over Voltage
Protection
• Internal Over-temperature Protection
• 8-Pin SOIC Package
APPLICATIONS
• Residential LED Lamps: A19 (E26/27, E14),
PAR30/38, GU10
• Solid State Lighting
DESCRIPTION
The TPS92314/14A is an off-line controller
specifically designed to drive high power LEDs for
lighting applications. Features include adaptive
constant on-time control and quasi-resonant
switching. Resonant switching allows for a reduced
EMI signature and increased system efficiency. Thus,
the device introduces a low external parts count and
high level of integration. The control algorithm of
TPS92314/14A 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.
The over current protection is implemented by a cycle
by cycle current limit of the primary inductor current.
TPS92314A has a higher OCP threshold which is
more suitable for universal line application and
TPS92314 can optimize the system cost. Other
supervisory features of the TPS92314/14A include
VCC over voltage protection and under-voltage
lockout, output LEDs over-voltage protection and
controller thermal shutdown. The TPS92314/14A is
available in 8-pin SOIC package.
spacer
TYPICAL APPLICATION
R1a
D1
AC
R1b
IN
D_OUT
Z_SN
T1
C_IN
D_SN
L_P
L_S
D_VCC
C_VCC
R_VCC
R_AUX1 ^LAUX
D_ZCD
R_AUX2
C_Y1
C_OUTa C_OUTb
LED+
6±7
LED
LED-
Q1
TPS92314
VCC GATE
AGND ISNS
R_FILTER
ZCD PGND
COMP DLY
C_COMP
R_DLY
R_ISNS
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 2012–2013, Texas Instruments Incorporated