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1FEATURES

? Ideal for Single Stage Designs

? Supports Isolated and Non-Isolated

Topologies

? Phase-Cut TRIAC Dimmable

? Few External Components Mode Operation

? Wide Duty Cycle Range for Wide-Input Voltage

or Dimming Range

? Convenient 5-V Reference Output

? Undervoltage Lockout for Safe Operation

? Operation to 1-MHz

? 0.4-A Source/0.8-A Sink FET Driver

? Low 100-μA Startup Current

APPLICATIONS

? Residential LED Lighting Drivers for A19

E12/E26/27, GU10, MR16, PAR30/38 Integral

Lamps

? Drivers for Wall Sconces, Pathway Lighting

and Overhead Lighting

? Drivers for Wall Washing, Architectural and Display Lighting

DESCRIPTION

The TPS92001/2 family of general LED lighting PWM

controllers contains control and drive circuitry

required for off-line isolated or non-isolated LED

lighting applications.

The controllers can support Phase Cut TRIAC

dimming with minimal external components. The

controllers can also be implemented for stage

conversion where the power factor (PF) exceeds

regulatory requirements for lighting. These controllers

also have an accessible 5-V reference that could be

used to power a microcontroller or other low power

peripheral components. The controllers operate in

fixed frequency current mode switching with minimal

external parts count. Internally implemented circuits

include undervoltage lockout featuring startup current

less than 100 μA, logic to ensure latched operation, a

PWM comparator, and a totem pole output stage to

sink or source peak current. The output stage,

suitable for driving N-Channel MOSFETs, is low in

the off state. Oscillator frequency and maximum duty

cycle are programmed with two resistors and a

capacitor.

The TPS92001/2 family also features full cycle soft start. The family offers UVLO thresholds and

hysteresis levels for off-line and DC-to-DC systems.

The TPS92001/2 is offered in the 8-pin MSOP (DGK)

and 8-pin SOIC (D) packages. The small MSOP

package makes the device ideally suited for

applications where board space and height are at a

premium.