NJM2355D#

NJM2355 TWO OUTPUT HIGH VOLTAGE SWITCHING REGULATOR ■ GENERAL DESCRIPTION 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 channel B output circuit. The NJM2355 is suited for DC to DC converter application; step up, step down, positive to negative. ■ PACKAGE OUTLINE NJM2355D ■ 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 PARAMETER (Ta = 25ºC) SYMBOL RATINGS UNIT Supply Voltage + V 24 V Output Current 1 I01 200 mA Output Current 2 I02 200 mA Power Dissipation PD 700 mW Operating Temperature Range Topr -20 to + 75 ºC Storage Temperature Range Tstg -40 to +125 ºC (Ta = 25ºC, V+ = 15V) ■ ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Operating Current (1) ICC (1) Operating Current (2) ICC (2) MIN. TYP. MAX. UNIT + TEST CONDITION - 5.7 7.5 mA + - 5.9 8.0 mA MIN. TYP. MAX. UNIT 4.8 5.0 5.2 V V = 15V V = 50V < Reference Section > PARAMETER SYMBOL Output Voltage VREF TEST CONDITION IREF = 0mA + Line Ragulation REGin V = 7.5V to 50V, IREF = 0mA - 12 35 mV Load Regulation REG1 IREF = 0mA to 10mA - 6 15 mV - 30 - mA - 4.3 4.6 V - 0.3 - V MIN. TYP. MAX. UNIT 25 28 31 kHz MIN. TYP. MAX. UNIT DT = 0V - - -10 µA Ct = 0.01µF, Rt = 4.3kΩ 90 - - % Duty Cycle : 0% 2.0 2.5 3.0 V MIN. TYP. MAX. UNIT - - 4.5 V Output Short Current Output disable Voltage Vnop Output disable hysterisis Voltage OUT= High Level ∆Vnop < Oscillator Section> PARAMETER SYMBOL Frequency FO TEST CONDITION Ct = 0.01µF, Rt = 4.3kΩ < Dead Interval Adjustment Section > PARAMETER Input Bias Current Maximum Duty (On-time) Input Threshold Voltage SYMBOL Ibdt ∆Ton/T Vth TEST CONDITION < PWM Comparator Section > PARAMETER Input Threshold Voltage -2- SYMBOL Vthe TEST CONDITION Duty Cycle : 0% Ver.2003-07-18 NJM2355 ■ ELECTRICAL CHARACTERISTICS PARAMETER (V+ = 15V, Ta = 25ºC) SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Input Offset Voltage VIO FB = 2.5V - 1 10 mV Input Offset Current IIO FB = 2.5V - 5 250 nA Input Bias Current IB FB = 2.5V - 0.05 1 µA Common Mode Input Voltage Range + VICM V = 7.5 to 50V 0 - VCC-2 V Voltage Gain AV FB = 0.5 to 3.5V 70 100 - dB Band Width ft - 800 - kHz AV = 1 Common Mode Rejection Ratio CMR VCC = 50V 65 80 - dB Output Sink Current ISINK VID = 5V, FB = 0.7V 0.2 0.4 - mA ISOURSE VID = 5V, FB = 3.5V -1 -2.5 - mA MIN. TYP. MAX. UNIT Output Source Current < Output Section > PARAMETER SYMBOL TEST CONDITION Leak Current ICER VCE = 50V - - 100 µA Saturation Voltage VSAT IO = 100mA - 0.9 1.3 V Ver.2003-07-18 -3- NJM2355 ■ TERMINAL EXPLANATION PIN NO. -4- PIN SYMBOL FUCTION 1. VREF 5V Reference Voltage Output 2. Ct The oscillator frequency is decided by putting Capacitor, Ct. 3. Rt The oscillator frequency is decided by putting resistor, Rt. EQUIVALENT CIRCUIT Ver.2003-07-18 NJM2355 ■ TERMINAL EXPLANATION PIN NO. PIN SYMBOL FUNCTION 4. +INPUT1 5. -INPUT1 16. +INPUT3 15. -INPUT3 18. +INPUT2 17. -INPUT2 6. FEED BACK-A OUTPUT of Error Amp 1 (A Channel) 14. FEED BACK-B OUTPUT of Error Amp 2 and Error Amp 3 (B Channel) Ver.2003-07-18 EQUIVALENT CIRCUIT +INPUT of Error Amp 1 (A Channel) -INPUT of Error Amp 1 (A Channel) +INPUT of Error Amp 3 (B Channel) -INPUT of Error Amp 3 (B Channel) +INPUT of Error Amp 2 (B Channel) -INPUT of Error Amp 2 (B Channel) -5- NJM2355 ■ TERMINAL EXPLANATION PIN NO. -6- PIN SYMBOL FUNCTION 7. DEAD TIME CONTROL-A 13. DEAD TIME CONTROL-B 8. SYSTEM GND Ground 9. OUT-A 11. OUT-B Internal Switching Transistor: Open Collector (A Channel) (B-Channel) 10. POWER GND Ground Connect to PIN 8. 12. V+ Power Supply EQUIVALENT CIRCUIT The Dead Time Width is adjustable by terminal voltage adjust. (A Channel) (B-Channel) Ver.2003-07-18 NJM2355 ■ TYPICAL APPLICATION Ver.2003-07-18 -7- NJM2355 ■ TYPICAL CHARACTERISTICS Output Disable Voltage at Low Input Voltage Output Disable Voltage at Low Input Voltage vs. Temperature Operating Current vs. Operating Voltage Reference Voltage vs. Operating Voltage Reference Voltage vs. Temperature Oscillation Frequency vs. Rt, Ct -8- Ver.2003-07-18 NJM2355 ■ TYPICAL CHARACTERISTICS Oscillation Frequency vs. Temperature Open Loop Voltage Gain vs. Frequency < Error Amplifier Section > Output Sink Current vs. Feedback Terminal Voltage < Error Amplifier Section> Output Sink Current vs. Temparature Ver.2003-07-18 < Error Amplifier Section > Output Source Current vs. Feedback Terminal Voltage < Error Amplifier Section > Output Source Current vs. Temperature -9- NJM2355 ■ TYPICAL CHARACTERISTICS < Output Section > Saturation Voltage vs. Output Current < Output Section > Saturation Voltage vs. Temperature [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. - 10 - Ver.2003-07-18