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| NJM2362 CURRENT MODE FLYBACK PWM SWITCHING REGULATOR GENERAL DESCRIPTION NJM2362 is the current mode flyback type, switching supply voltage IC. Totempole type output, which can drive MOSFET in high speed operation directly. As to the functional protection, internalizing UVLO that can prevent from miss motion at low input voltage operation, pulse by pulse current limit for primary current of transformer, remote off circuit that can stop the entire motions by the external voltage, the over saturate protection circuit that stops the output by detecting the saturated state of the transformer. FEATURES * Operating Voltage (9V to 20V) * Latching PWM for Cycle-By-Cycle Current Limiting * Under Voltage Lockout (UVLO) * Internal Remote Shut-Down Circuit * Package Outline DIP14 * Bipolar Technology BLOCK DIAGRAM & PIN CONFIGURATION PACKAGE OUTLINE NJM2362D NJM2362D Ver.2003-07-18 -1- NJM2362 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL V + (Ta = 25C) RATINGS 20 700 -20 to + 75 -40 to +125 UNIT V mW C C PD Topr Tstg ELECTRICAL CHARACTERISTICS PARAMETER Operating Current Start up Current SYMBOL ICC ICS V = 6.5V + (Ta = 25C, V+ = 15V) TEST CONDITION MIN. TYP. 14.0 1.0 MAX. 18.0 1.5 UNIT mA mA REFERENCE VOLTAGE PARAMETER Output Voltage Line Ragulation Load Regulation Temperature Stability Short Circuit Current SYMBOL VR VR - V TR IS + TEST CONDITION IREF = 1mA 10 V 20V 1 IO 20mA 0 Ta 75C *1 + MIN. 4.80 50 TYP. 5.00 12.0 6.0 0.5 80 MAX. 5.20 35.0 25.0 120 UNIT V mV mV mV/C mA VR - IO UVLO PARAMETER Start Threshold Voltage Minimum Operating Voltage Hysterisis width SYMBOL VSTH VMIN VHIS TEST CONDITION MIN. 7.80 7.00 TYP. 8.40 7.60 0.8 MAX. 9.00 8.20 UNIT V V V OSILLATION PARAMETER Osillating Frequency Temperature Stability Output Amplitude SYMBOL FO FO-Ta VF TEST CONDITION Ct = 3.3NF, Rt =10.4k 0 Ta 75C 7Pin Peak TO Peak MIN. 45 TYP. 50 5 1.7 MAX. 55 UNIT kHz % V ERROR AMPLIFIER PARAMETER Input Bias Current Open Loop Gain Gain Bandwidth Output Sink Current Output Source Current SYMBOL IEB AEO GBE IEK IES VEF = 2.7V, COMP = 1.1V VEF = 2.3V, COMP = 5.0V *1 2 VO 4V TEST CONDITION MIN. 2.0 0.5 TYP. 0.3 90 1 6.0 0.8 MAX. 2.0 UNIT A dB MHz mA mA -2- Ver.2003-07-18 NJM2362 CURRENT DETECTOR PARAMETER Input Bias Current Gain Current Limit Voltage Input Capacitance Range SYMBOL ICB GC VCLR *1 VEF = OV, *2 VPC = 0.5V, RS = 0.5, IS = 5A TEST CONDITION MIN. 2.85 0.42 TYP. 2.0 3.00 0.50 MAX. 10.0 3.15 0.58 UNIT A V V FLYBACK COMPARATOR PARAMETER Input Bias Current Input Voltage Range SYMBOL IFB VFR *1 TEST CONDITION MIN. 0 TYP. 0.3 MAX. 2.0 V -2 + UNIT A V PWM PARAMETER Maximum Duty Cycle Minimum Duty Cycle SYMBOL TPMAX TPMIN TEST CONDITION MIN. TYP. 48 MAX. 0 UNIT % % REMOTE PARAMETER Remote Off Threshold Remote Off Operating Supply Current SYMBOL VRTH IRQ *3 VRTH = 2V TEST CONDITION MIN. TYP. 1.5 MAX. 2.0 2.0 UNIT V mA OUTPUT PARAMETER Output Low Level Output Low Level Output High Level Output High Level Fall up Time Fall down Time SYMBOL VOL (1) VOL (2) VOH (1) VOH (2) tor tor TEST CONDITION Isink = 20mA Isink = 200mA Isource = 20mA Isource = 200mA CL = 1000PF CL = 1000PF MIN. 13.0 12.0 TYP. 0.1 1.5 13.5 13.5 100 100 MAX. 0.4 2.2 UNIT V V V V nS nS *1 Displaying : by the direction, Coming from IC. *2 Gc = VCOMP/VCS ; OV -3- NJM2362 TERMINAL FUNCTION PIN NO. 1 2 VFL VFC SYMBOL FUCTION Comparator - Input Comparator + Input INSIDE EQUIVALENT CIRCUIT 3 VEF Error Amplifier - Input 4 COMP Error Amplifier Output 5 6 VCS VPC Comparator - Input Comparator + Input -4- Ver.2003-07-18 NJM2362 TERMINAL FUNCTION PIN NO. 7 SYMBOL RTCT FUCTION Connect the resistor, and capacitor and decide the oscillating Frequency FO = 1.72/(RT * CT) INSIDE EQUIVALENT CIRCUIT 8 9 GND P. GND Ground Ground Connect to pin 8 when operation Output It is totempole type output, and it can drive MOS FET directly 10 V0 11 12 V+ P. V+ Supply Voltage Supply Voltage Please Connect to pin 11 when application 5V Reference Output Voltage 13 VREF Ver.2003-07-18 -5- NJM2362 TERMINAL FUNCTION PIN NO. 14 SYMBOL Remote Remote FUCTION EQUIVALENT CIRCUIT TYPICAL APPLICATIONS 1 FLYBACK FORM CONVERTER TYPICAL APPLICATIONS 2 FORWARD FORM CONVERTER -6- Ver.2003-07-18 NJM2362 TYPICAL APPLICATIONS 3 DC/DC/ CONVERTER TYPICAL APPLICATIONS 4 2-OUTPUT TYPE DC/DC/ CONVERTER Ver.2003-07-18 -7- NJM2362 TYPICAL CHARACTERISTICS Reference Voltage vs. Operating Voltage Operating Current vs. Operating Voltage Oscillation Frequency vs. Rt Ct Output Saturating Voltage vs. Output Current [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. -8- Ver.2003-07-18 |
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