irs25411 International Rectifier Corp., irs25411 Datasheet

Page 1

... Features • 200 V (IRS25401) and 600 V (IRS25411) half bridge driver • Micropower startup (<500 μA) • ±2% voltage reference • 140 ns deadtime • 15.6 V zener clamp • Frequency up to 500 kHz • Auto restart, non-latched shutdown • PWM dimmable • Small 8-Lead DIP/8-Lead SOIC packages ...

Page 2

Table of Contents Description Qualification Information Absolute Maximum Ratings Recommended Operating Conditions lectrical Characteristics Functional Block Diagram Input/Output Pin Equivalent Circuit Diagram Lead Definitions Lead Assignments Application Information and Additional Details Package Details Tape and Reel Details Part Marking Information ...

Page 3

Description The IRS254(01,11) 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. These ...

Page 4

Alternate application circuit using a single MOSFET www.irf.com IRS254(01,11)(S) 4 © 2010 International Rectifier ...

Page 5

Qualification Information Qualification Level Moisture Sensitivity Level Machine Model ESD Human Body Model IC Latch-Up Test RoHS Compliant † Qualification standards can be found at International Rectifier’s web site †† Higher qualification ratings may be available should the user have ...

Page 6

... Junction temperature J †† : Sufficient current should be supplied to V www.irf.com Definition IRS25401 IRS25411 (8-Pin DIP) ≤+25 ºC A (8-Pin SOIC) THJA (8-Pin DIP) (8-Pin SOIC) CC Definition IRS25401 IRS25411 to keep the internal 15.6 V zener regulating IRS254(01,11)(S) Min Max -0.3 225 -0.3 625 – ...

Page 7

... EN>V ENTH+ 1.0 2 Duty Cycle = 50% 2.0 3 kHz 15.6 16 0.05 1 1.0 2 7.5 8.5 V 7.0 8.0 IRS25401 µA IRS25411:V 26.0 27 2.7 3.0 V 2.0 2.3 500 510 mV 500 540 500 --- kHz COM --- V V --- CC 50 120 --- A 140 --- kHz square FB wave, 200 mV pk-pk 320 --- ...

Page 8

Functional Block Diagram IFB 3 UVN UVLO ENN BANDGAP 100 K REFERENCE www.irf.com Watchdog Timer Values in block diagram are typical values 8 IRS254(01,11)(S) 8 PULSE DELAY LEVEL 7 FILTER & ...

Page 9

... Input/Output Pin Equivalent Circuit Diagrams: IRS25401/IRS25411 www.irf.com IRS254(01,11)(S) 9 © 2010 International Rectifier ...

Page 10

Lead Definitions PIN # Symbol 1 VCC Supply voltage 2 COM IC power & signal ground 3 IFB Current feedback 4 ENN Disable outputs (LO=High, HO=Low Low–side gate driver output 6 VS High–side floating return 7 HO High–side ...

Page 11

State Diagram www.irf.com IRS254(01,11)(S) 11 © 2010 International Rectifier ...

Page 12

Application Information and Additional Details Operating Mode The IRS254(01,11) operates as a time-delayed hysteritic buck controller. During normal operating conditions the output current is regulated via the IFB pin voltage (nominal value of 500 mV). This feedback is compared to ...

Page 13

Watchdog Timer During an open circuit condition, without the watchdog timer, the HO output would remain high at all times and the charge stored in the bootstrap capacitor C would gradually discharge the floating power supply for the high-side driver, ...

Page 14

Enable Duty Cycle Relationship to Light Output 100 Percentage of Light Output Fig.5 Light Output vs Enable Pin Duty Cycle Fig.6 ...

Page 15

IC does not enter UVLO unless the supply voltage falls below V CCUV- - Inductance Selection To maintain tight hysteretic current regulation the inductor and output capacitor C LEDs) need to be large enough ...

Page 16

Vin (V) Fig 350 mA 16 470 μH out out 400 350 300 250 200 150 100 Capacitance ...

Page 17

Package Details www.irf.com IRS254(0,1)(S)PbF 17 © 2010 International Rectifier ...

Page 18

Tape and Reel Details F NOTE : CONTROLLING DIM ENSION CARRIER TAPE DIMENSION FOR 8SOICN Code REEL DIMENSIONS FOR 8SOICN Code ...

Page 19

Part Marking Information SOIC PDIP www.irf.com IRS254(0,1)(S)PbF 19 © 2010 International Rectifier ...

Page 20

... Tape and Reel PDIP8 Tube/Bulk Tube/Bulk SOIC8 Tape and Reel http://www.irf.com/technical-info/ WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 20 IRS254(0,1)(S)PbF Complete Part Number Quantity 50 IRS25401PBF 95 IRS25401SPBF 2500 IRS25401STRPBF 50 IRS25411PBF 95 IRS25411SPBF 2500 IRS25411STRPBF © 2010 International Rectifier ...