Texas Instruments TPS92001

Description

The TPS92001/2 family of general LED lighting PWM controllers contains control and drive circuitry required for off-line isolated or non-isolated LEDlighting 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 minimalexternal 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 dutycycle 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.

Features

• 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

Remarks:

• L1=470uH used. Refer page no-9 & 8
• L1=L2=L3=470uHrefer-http://www.ti.com/lit/ug/sluu897/sluu897.pdf and page no-3

Typical applications

• Display Lighting
• Architectural Lighting
• Drivers for Wall Sconces
• Pathway Lighting
• Overhead Lighting
• Residential LED Lighting Drivers for A19 E12/E26/27, GU10, MR16, PAR30/38 Integral Lamps
• Drivers for Wall Washing

More information

• Datasheet
• IC product information