IRS2540PBF Datasheet, PDF (1/14 Pages) International Rectifier – LED BUCK REGULATOR CONTROL IC

Data Sheet No. PD60293
IRS254(0,1)(S)PbF
LED BUCK REGULATOR CONTROL IC
Description
The IRS254(0,1) are high voltage, high frequency
buck control ICs for constant LED current regulation.
They incorporate a continuous mode time-delayed
hysteretic buck regulator to directly control the
average load current, using an accurate on-chip
bandgap voltage reference.
The application is inherently protected against short
circuit conditions, with the ability to easily add open-
circuit protection. An external high-side bootstrap
circuit drives the buck switching element at high
frequencies. A low-side driver is also provided for
synchronous rectifier designs. All functions are
realized within a simple 8 pin DIP or SOIC package.
Features
• 200 V (IRS2540) and 600 V (IRS2541) half bridge
driver
• Micropower startup (<500 µA)
• ±2% voltage reference
• 140 ns deadtime
• 15.6 V zener clamp on V_CC
• Frequency up to 500 kHz
• Auto restart, non-latched shutdown
• PWM dimmable
• Small 8-Lead DIP/8-Lead SOIC packages
Packages
Typical Application Diagram
8-Lead PDIP
IRS254(0,1)PbF
8-LeadSOIC
IRS254(0,1)SPbF
VBUS
COM
EN
L2
CBUS2
CBUS1
RS1
RS2
DBOOT
CVCC1
ROV1
DCLAMP CVCC2
DOV
ROV2
CEN
VCC
1
COM
2
IFB
3
ENN
4
IC1
VB
8
HO
7
VS
6
LO
5
RF
RG1
M1
CBOOT
L1
M2
RG2
COUT
ROUT
CF
DEN1
VOUT+
VOUT-
RCS
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