NJM2381

NJM2381 www.DataSheet4U.com SWITCHING REGULATOR CONTROL IC FOR FLYBACK WITH CURRENT SENSE AMPLIFIER IGENERAL DESCRIPTION The NJM2381 is a low voltage operation DC/DC converter control IC. It features totem pole output directly driving external bipolar transistor and operates at high switching frequency which improves transient response. It is suitable for LCD back light, and other portable applications. IPACKAGE OUTLINE NJM2381D NJM2381M IFEATURES G PWM switching control G Operating Voltage (3.6 to 32V) G Wide Oscillator Range (5 to 350 kHz) G Current Sensing Amplifier G Soft-Start Function G UVLO(Under Voltage Lockouts) G Bipolar Technology G Package Outline DIP14, DMP14, SSOP10 NJM2381V IPIN CONFIGURATION 1 2 3 4 5 6 7 14 13 12 11 10 9 8 PIN FUNCTION 8.NC 1.NC 9. V+ 2.IN 1 3.IN 2 10.CS 11.CT 4.F.B 12.REF 5.GND 13.IN+ 6.OUT 7.NC 14.NC NJM2381D NJM2381M 1 2 3 4 5 10 9 8 7 6 NJM2381V PIN FUNCTION 6. V+ 1.IN-1 2.IN-2 7.CS 8.CT 3.F.B 9.REF 4.GND 10.IN+ 5.OUT Ver 3.3 - 1 - NJM2381 www.DataSheet4U.com IBLOCK DIAGRAM NC 14 IN+ 13 REF 12 CT 11 CS 10 V+ 9 NC 8 VREF CURRENT SENSE AMP OSC L.O U.V.LO 500Ω ER·AMP 0.52V PWM 1 NC 2 IN-1 3 IN-2 4 F.B 5 GND 6 OUT 7 NC (Package: DIP14, DMP14) IN+ 10 REF 9 CT 8 CS 7 V+ 6 VREF CURRENT SENSE AMP OSC L.O U.V.LO 500Ω ER·AMP 0.52V PWM 1 IN 1 - 2 IN 2 - 3 F.B 4 GND 5 OUT (Package: SSOP10) -2- NJM2381 www.DataSheet4U.com IABSOLUTE MAXIMUM RATINGS (Ta=25°C ) PARAMETER SYMBOL Input Voltage V+ Referenc...