NJM2355 TWO OUTPUT HIGH VOLTAGE SWITCHING REGULATOR GENERAL DESCRIPTION PACKAGE OUTLINE New JRC s high voltage switching regulator, NJM2355, is a monolithic high voltage (50V max) operation integrated circuit consisting of two channel PWM controllers. The NJM2355 contains an internal 5V reference, free running oscillator, low supply voltage detector, two comparators and three error amplifiers. The error amp 2 or amp 3 is for current limiting in NJM2355D channel B output circuit. The NJM2355 is suited for DC to DC converter application step up, step down, positive to negative. FEATURES Operating Voltage (7.5V to 50V) Complete PWM Power Control Circuit Uncommitted Outputs fov 200-mA Sink or Source Output control Selects Single-Ended or pull Operation Internal Cicuitry Prohibits Double Pulse at Either Output Variable Dead-Time Provides Control Over Total Range Package Outline DIP18 Bipolar Technology BLOCK DIAGRAM & PIN CONFIGURATION NJM2355D Ver.2003-07-18 -1- NJM2355 ABSOLUTE MAXIMUM RATINGS (Ta = 25C) PARAMETER SYMBOL RATINGS UNIT + Supply Voltage V 24 V Output Current 1 I 200 mA 01 Output Current 2 I 200 mA 02 Power Dissipation P 700 mW D Operating Temperature Range T -20 to + 75 C opr Storage Temperature Range T -40 to +125 C stg + ELECTRICAL CHARACTERISTICS (T = 25C, V = 15V) a PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX.UNIT + Operating Current (1) I (1) V = 15V - 5.7 7.5 mA CC + Operating Current (2) I (2) V = 50V - 5.9 8.0 mA CC < Reference Section > PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX.UNIT Output Voltage V I = 0mA 4.8 5.0 5.2 V REF REF + Line Ragulation REG V = 7.5V to 50V, I = 0mA - 12 35 mV in REF Load Regulation REG1 I = 0mA to 10mA - 6 15 mV REF Output Short Current - 30 - mA Output disable Voltage V OUT= High Level - 4.3 4.6 V nop Output disable hysterisis Voltage V - 0.3 - V nop < Oscillator Section> PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX.UNIT Frequency F C = 0.01F, R = 4.3k 25 28 31 kHz O t t < Dead Interval Adjustment Section > PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX.UNIT Input Bias Current Ibdt DT = 0V - - -10 A Maximum Duty (On-time) Ton/T C = 0.01F, R = 4.3k 90 - - % t t Input Threshold Voltage V Duty Cycle : 0% 2.0 2.5 3.0 V th < PWM Comparator Section > PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX.UNIT Input Threshold Voltage V Duty Cycle : 0% - - 4.5 V the Ver.2003-07-18 - 2 -