IRS25401S Datasheet, PDF (1/2 Pages) International Rectifier – High-Voltage Buck Control ICs for Constant LED Current Regulation

LIGHTING
High-Voltage Buck Control ICs for
THE POWER MANAGEMENT LEADER
Constant LED Current Regulation
Features
• Internal high voltage regulator
• Hysteretic current control
• High side current sensing
• PWM dimming with analog or PWM
control input
• Free running frequency with maximum
limiting (150kHz)
Benefits
• Low component count
• Off-line operation
• Very simple design
• Inherent stability
• Inherent short circuit protection
LEDrivIR^™
The IRS2980 is the latest addition to IR’s range of Buck controllers complementing
the existing IRS25401/11 series for non-isolated LED driver applications. The IRS2980
includes a high voltage regulator which enables the IRS2980 to be supplied directly
from the input voltage bus and differential high side current sensing enabling the
use of a single MOSFET and ultra-fast diode as well as maximum frequency limiting.
These improvements provide design simplification and cost saving while being able
to operate up to 450V with adequate thermal relief. A PWM dimming interface is also
incorporated making the IRS2980 a versatile low cost LED driver solution.
Applications include LED bulb replacement, indoor and outdoor signage as well as
architectural, entertainment design and decorative lighting.
The IRS2980 and IRS25401/11 operate in continuous conduction mode using hysteretic
average current control.
For more information in North America call+1 310 252 7105, in Europe call [phone], or visit us at www.irf.com
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