LX27901ID |
Product Status
In Production |
Overview
| The LX27901 is an extremely versatile high-performance controller for driving LEDs from the HVDC (output) rail of a standard PFC front-end. The controller allows the user to utilize three different converter drive schemes, LLC (resonant), conventional PWM control, and Microsemi’s proprietary synchronous scheme, all selectable by the multi-function ENABLE pin. In non-resonant mode, the controller provides two 180° phase-shifted pulse-width modulated drive signals for implementing various two-switch DC-DC converter topologies, such a half-bridge and asymmetrical forward converter. It can also be used for one-switch topologies. Direct PWM input dimming operation can be realized by inputting a suitable dimming pulse train to the DIM pin. The LX27901 supports analog LED current control utilizing the BRTA pin for setting the analog LED current. In addition, a proprietary dimming algorithm ACU_BRITE® is incorporated. The controller integrates the pulsed LED current and compares it with a reference for very accurate brightness control irrespective of duty cycle. The LX27901 is designed to operate with Microsemi’s proprietary lossless (magnetic) current balancing schemes. See more at  LX27901 Application Note for LED Backlight.Features
|
ROHS| Package Carrier: | Tube |
| Electrical Rating | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage | Vin |
7.5 | 27 | VDC | |
| Quiescent Current | IQ | 200 | 400 | µA |
Resources
| Datasheets | |
|---|---|
| LX27901 Datasheet |
| App Notes | |
|---|---|
| LX27901 Application Note for LED Backlight |
|
| Understanding and using LLC Converters to Great Advantage |
| Reliability | |
|---|---|
| Quality & Reliability Report - Aliso Viejo, CA, USA - Garden Grove, CA, USA - San Jose, CA, USA |
This part can be found in the following product categories:
