IP2844 Datasheet | Seme LAB

FEATURES - - - - - Guaranteed ±1% reference voltage tolerance Guaranteed ±10% frequency tolerance Low start- up current (<500 m A) Under voltage lockout with hysteresis Output state pletely defined for all supply and input conditions - Interchangeable with UC1844 and UC1845 series for improved operation - 500k Hz Oscillator operation 250k Hz Output operation J Package - 8 Pin Ceramic DIP N Package - 8 Pin Plastic DIP D-8 Package - 8 Pin Plastic (150) SOIC TOP VIEW P 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 I SENSE 5 N/C R T /C T 7 D-14 Package - 14 Pin Plastic (150) SOIC Order Information Part Number IP1844 IP2844 IP3844 IP1845 IP2845 IP3845 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. IP1844D- 14 IP3845J 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 @ Tamb > 50°C Power Dissipation Derate @ Tcase > 25°C Storage Temperature Range Lead Temperature (low impedance source) (ICC < 30m A) (capacitive load) (pins 2 and 3) Tamb = 25°C Tcase = 25°C Tcase = 25°C J, N Packages D Package J, N Packages +30V Self limiting ±1A 5µJ - 0.3V to +VCC 10m A 1W 10m W/°C 725m W 7.25m W/°C 2W 16m W/°C - 65 to 150°C +300°C Prelim. 2/95 PD PD PD TSTG TL (soldering, 10 seconds) Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612. DESCRIPTION SEME IP1844 SERIES IP1845 SERIES The IP1844 and IP1845 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 voltage reference, error amplifier, current sense parator, oscillator, totem-pole output driver...