TPS92314DSLASHNOPB中文资料德州仪器数据手册PDF规格书

1FEATURES

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.