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IP1842

Seme LAB
Part Number IP1842
Manufacturer Seme LAB
Description CURRENT MODE REGULATING PULSE WIDTH MODULATORS
Published Apr 5, 2005
Detailed Description IP1842 SERIES IP1843 SERIES TOP VIEW COMP 1 V FB 2 I SENSE 3 R T /C T 4 8 7 6 5 VREF VCC OUTPUT GROUND CURRENT MODE R...
Datasheet PDF File IP1842 PDF File

IP1842
IP1842

Overview
IP1842 SERIES IP1843 SERIES TOP VIEW COMP 1 V FB 2 I SENSE 3 R T /C T 4 8 7 6 5 VREF VCC OUTPUT GROUND CURRENT MODE REGULATING PULSE WIDTH MODULATORS FEATURES • • • • • Guaranteed ±1% reference voltage tolerance Guaranteed ±10% frequency tolerance Low start–up current (<500 mA) Under voltage lockout with hysteresis Output state completely defined for all supply and input conditions • Interchangeable with UC1842 and UC1843 series for improved operation • 500kHz operation J Package – 8 Pin Ceramic DIP N Package – 8 Pin Plastic DIP D-8 Package – 8 Pin Plastic (150) SOIC TOP VIEW COMP 1 N/C 2 14 13 12 11 10 9 8 VREF N/C VCC VC OUTPUT GROUND POWER GROUND V FB 3 N/C 4 I SENSE 5 N/C 6 R T /C T 7 D-14 Package – 14 Pin Plastic (150) SOIC Order Information Part Number IP1842 IP2842 IP3842 IP1843 IP2843 IP3843 J–Pack 8 Pin ✔ ✔ ✔ ✔ ✔ ✔ N–Pack 8 Pin ✔ ✔ ✔ ✔ D–8 8 Pin ✔ ✔ ✔ ✔ D–14 14 Pin ✔ ✔ ✔ ✔ Temp.
Range -55 to +125°C -25 to +85°C 0 to +70°C -55 to +125°C -25 to +85°C 0 to +70°C Note: To order, add the package identifier to the part number.
eg.
IP1842J IP3843D-14 ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) VCC IO Supply Voltage Output Current Output Energy Analog Inputs Error Amp Output Sink Current Power Dissipation Derate @ Tamb > 50°C Power Dissipation Derate @ Tcase > 25°C Storage Temperature Range Lead Temperature (low impedance source) (ICC < 30mA) (capacitive load) (pins 2 and 3) Tamb = 25°C Tcase = 25°C +30V Self limiting ±1A 5mJ –0.
3V to +VCC 10mA 1W 10mW/°C 2W 24mW/°C –65 to 150°C +300°C Prelim.
3/00 PD PD TSTG TL (soldering, 10 seconds) Semelab plc.
Telephone +44(0)1455 556565.
Fax +44(0)1455 552612.
E-mail: sales@semelab.
co.
uk Website: http://www.
semelab.
co.
uk IP1842 SERIES IP1843 SERIES DESCRIPTION The IP1842 and IP1843 series of switching regulator control circuits contain all the functions necessary to implement off–line, current mode switching regulators, using a minimum number of external parts.
Functions included are voltag...


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