Non-isolated, Phase Dimmable, Buck PFC LED Driver with Digital Reference Control - TPS92075

TPS92075 (ACTIVE)

Non-isolated, Phase Dimmable, Buck PFC LED Driver with Digital Reference Control

 

Description

The TPS92075 is a hybrid power factor controller (PFC) with a built-in phase dimming decoder. The device analyzes line cycles continuously using an internal, low-power, digital controller for shape and symmetry. The power converter stage generates an analog current reference and uses it to regulate the output current. The device uses control algorithms to manipulate the analog reference. These algorithms optimize dimmer compatibility, power factor and total harmonic distortion (THD).

Using a constant off-time control, the solution achieves low component count, high efficiency and inherently provides variation in the switching frequency. This variation creates an emulated spread spectrum effect easing the converters EMI signature and allowing a smaller input filter.

The TPS92075 also includes standard features: current limit, overvoltage protection, thermal shut-down, and VCC undervoltage lockout, all in packages

Features

  • Controlled Reference Derived PFC
  • Integrated Digital Phase-Angle Decoder
  • Digital 50/60 Hz Synchronization
  • Phase-Symmetry Balancing
  • Constant LED current operation
  • Fast Start-up
  • Dimming Implemented Via Analog Reference Control
  • Smooth Dimming Transitions
  • Overvoltage Protection
  • Feedback Short-Circuit Protection
  • Leading and Trailing Edge Dimmer Compatibility
  • Low BOM Cost and Small PCB Footprint
  • Patent Pending Digital Architecture
  • Available in 8-Pin SOIC and 6-Pin TSOT

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Parametrics Compare all products in LED Lighting - Illumination

 
Input Voltage (Type)
Vin (Min) (V)
Vin (Max) (V)
Iout (Max) (A)
Vout (Min) (V)
Vout (Max) (V)
Regulated Outputs (#)
Topology
Dimming Method
Power Factor Correction (Min)
Type
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Vref (V)
UVLO Thresholds On/Off (V)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS92075 LM3447 TPS92070 TPS92074
AC/DC     AC/DC     AC/DC     AC/DC    
11     7.5     9     11    
18     17.5     21.5     18    
2     2     0.5     2    
9     9     9     9    
120     60     60     120    
1     1     1     1    
Buck
Buck-Boost    
Flyback     Flyback     Buck
Buck-Boost    
Analog
Forward Phase (Triac)
PWM
Reverse Phase    
Forward Phase (Triac)
Reverse Phase    
Forward Phase (Triac)     Analog
PWM    
Active     Active     Passive     Active    
Inductive     Inductive     Inductive     Inductive    
50     60     20     50    
300     120     138     300    
1.3     1.6     0.75     1.3    
0.5     1     0.1     0.5    
9.8 / 6.4     10.5 / 7.5     7.88 / 7.78     9.8 / 6.4    
Adjustable Switch Frequency
Soft Start
Thermal Shutdown    
Adjustable Switch Frequency
Soft Switching
Thermal Shutdown    
Soft Switching
Thermal Shutdown    
Adjustable Switch Frequency
Soft Start
Thermal Shutdown    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
6SOT
8SOIC    
14TSSOP     16TSSOP     6SOT
8SOIC    
0.40 | 1ku     0.50 | 1ku     0.60 | 1ku     0.35 | 1ku