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| NJM2383 DC/DC CONVERTER CONTROL IC WITH CURRENT SENSE AMPLIFIER sGENERAL DESCRIPTION The NJM2383 is a low voltage operation DC/DC converter control IC featuring high side current protection, soft start and standby functions. It is suitable for power module application and on-board regulators. NJM2383D NJM2383M sPACKAGE OUTLINE sFEATURES q PWM switching control q Operating Voltage (3.6 to 32V) q Wide Oscillator Range (5 to 350 kHz) q ON/OFF Circuit (High Active) q Current Sensing Amplifier q Soft-Start Function q UVLO(Under Voltage Lockouts) q Bipolar Technology q Package Outline DIP14, DMP14, SSOP10 NJM2383V sPIN 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.ON/OFF 6.OUT 14.NC 7.NC NJM2383D NJM2383M 1 2 3 4 5 10 9 8 7 6 NJM2383V PIN FUNCTION 6. V+ 1.IN-1 2.IN 2 7.CS 8.CT 3.F.B 9.REF 4.GND 10.ON/OFF 5.OUT Ver 1.0 - 1 - NJM2383 sBLOCK DIAGRAM NC 14 ON/OFF 13 REF 12 CT 11 CS 10 V+ 9 NC 8 ON/OFF "High" Active CURRENT SENSE AMP VREF OSC L.O U.V.LO 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) ON/OFF 10 REF 9 CT 8 CS 7 V+ 6 ON/OFF "High" Active CURRENT SENSE AMP VREF OSC L.O U.V.LO ER*AMP 0.52V PWM 1 IN 1 - 2 IN 2 - 3 F.B 4 GND 5 OUT (Package: SSOP10) -2- NJM2383 sABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL Input Voltage V+ Reference Output Current IOR Output Sink Current ISINK Differential Input Voltage VID Common Mode Input Voltage VIC ON/OFF Control Voltage VON/OFF Power Dissipation PD Operating Temperature Range Storage Temperature Range TOPR TSTG MAXIMUM RATINGS 36 10 200 2.5 -0.3 2.5 -0.3 36 (note) (DIP 14) 700 (DMP 14) 300 (SSOP 14) 250 -40 +85 -50 +125 UNIT V mA mA V V V mW C C (note) When the supply voltage is less than 36V, the absolute maximum input voltage is equal to the supply voltage. sELECTRICAL CHARACTERISTICS (V+=6V,RT=33k,CT=1000pF,VON/OFF=3V,Ta=25C) REFERENCE VOLTAGE BLOCK PARAMETER SYMBOL Output Voltage Line Regulation Load Regulation OSCILLATOR BLOCK PARAMETER Oscillation Frequency Oscillate Fluctuations1 (Line Fluctuations) Oscillate Fluctuations2 (Temp Fluctuations) VREF LINE LOAD + TEST CONDITION IOR=1mA V =3.6 32V, IOR=1mA IOR=0.1 5.0mA MIN. 2.45 - - TYP. 2.50 6.8 5 MAX. 2.55 20.7 30 UNIT V mV mV SYMBOL fOSC fdV fdT + TEST CONDITION RT=33k, CT=1000pF V =3.6 32V Ta=-40 85C MIN. 85 - - TYP. 105 1 5 MAX. 125 - - UNIT kHz % % CURRENT SENSE AMPLIFIER BLOCK PARAMETER SYMBOL Input Offset Voltage1 Input Offset Current1 Input Bias Current1 Open Loop Gain1 Gain Bandwidth Product1 Input Common Mode Voltage Ratio1 Maximum Output Voltage1 (F.B Pin) Maximum Source Current1 (F.B Pin) VIO1 IIO1 IB1 A V1 GB1 VICM1 VOM-1 IOM+1 TEST CONDITION MIN. - - - - - - TYP. 2 5 20 90 0.6 0 VREF-0.8 - 85 MAX. 7 - 100 - - - 1 200 UNIT mV nA nA dB MHz V V A RNF=100k VOM=0.5V - 40 -3- NJM2383 sELECTRICAL CHARACTERISTICS (V+=6V,RT=33k,CT=1000pF,VON/OFF=3V,Ta=25C) ERROR AMPLIFIER BLOCK PARAMETER SYMBOL Reference Voltage2 Input Bias Voltage2 Open Loop Gain2 Gain Bandwidth Product2 Maximum Output Voltage2 (F.B Pin) Maximum Source Current2 (F.B Pin) PWM COMPARATE BLOCK PARAMETER Input Threshold Voltage (F.B Pin) Input Threshold Voltage (F.B Pin) VB2 IB2 A V2 GB2 VOM-2 IOM+2 TEST CONDITION MIN. 0.51 - - - - 40 TYP. 0.52 5 90 0.6 - 85 MAX. 0.53 100 - - 1 200 UNIT V nA dB MHz V A RNF=100k VOM=0.5V SYMBOL VTH0 VTH100 TEST CONDITION duty*cycle=0% (note) duty*cycle=100% (note) MIN. - - TYP. 1.65 2.10 MAX. 1.75 - UNIT V V SOFT START CIRCUIT BLOCK PARAMETER SYMBOL Input Bias Current (CS Pin) Input Threshold Voltage (CS Pin) Input Threshold Voltage (CS Pin) IBCS VTHCS0 VTHCS50 TEST CONDITION CS Pin=1.8V duty*cycle=0% (note) duty*cycle=100% (note) MIN. - - - TYP. 250 0.25 0.7 MAX. 650 0.35 - UNIT nA V V UNDER VOLTAGE LOCKOUT BLOCK PARAMETER SYMBOL ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage OUTPUT BLOCK PARAMETER L Output Voltage (OUT Pin) VTHON VTHOFF VHYS TEST CONDITION MIN. - - 60 TYP. 2.70 2.52 180 MAX. - - - UNIT V V mV SYMBOL VOL TEST CONDITION Output Sink Current=100mA MIN. - TYP. 0.25 MAX. 0.65 UNIT V -4- NJM2383 sELECTRICAL CHARACTERISTICS (V+=6V,RT=33k,CT=1000pF,VON/OFF=3V,Ta=25C) ON/OFF BLOCK PARAMETER OFF Threshold Voltage (ON/OFF Pin) ON Threshold Voltage (ON/OFF Pin) Input Bias Current (ON/OFF Pin) SYMBOL VOFF VON ION/OFF TEST CONDITION MIN. - 1.1 TYP. - - 100 MAX. 0.3 - 120 UNIT V V A VON/OFF=3V - GENERAL CHARACTERISTICS PARAMETER SYMBOL Stand-by Current Latch Mode Threshold Voltage (CS Pin) Quiescent Current Average Quiescent Current ICCSTBY VTHLA ICCLA ICCAV TEST CONDITION Stand-by Mode, VON/OFF=0V MIN. - 1.2 - - TYP. 12 1.5 1.6 5.5 MAX. 20 1.8 2.2 10 UNIT A V mA mA Latch Mode RL= , duty*cycle=50% (note) Duty*Cycle is defined as follows: Duty*Cycle=0%: IC output transistor is OFF. Duty*Cycle=100%: IC output transistor is ON. s TYPICAL APPLICATIONS V 330k ON/OFF CONTROL 2.50V 36k 1000pF 4.7F 180k + 10 9 8 7 6 VOUT ON/OFF "High" Active CURRENT SENSE AMP VREF OSC L.O U.V.LO ER*AMP 0.52V PW M GND 1 2 3 4 5 (Package:SSOP10) -5- NJM2383 sTIPICAL CHARACTERISTICS L Output Voltage vs. Source Current (V+=6V,RT=33k,CT=1000pF,Ta=25) 100 Duty Cycle (%) 80 60 40 20 0 0 50 100 150 200 250 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 CS Pin Voltage VTHCS (V) Oscillator Frequency vs. Timing Capacitor (V+=6V,Ta=25C) Source Current ISOURCE (mA) Oscillator Frequency vs. Timing Resistor (V+=6V,Ta=25C) Duty Cycle vs. CS Pin Voltage (V+=6V,Ta=25) 1 L Output Voltage VOL (V) 0.8 0.6 0.4 0.2 0 1000 Oscilltor Frequency f OSC (kHz) 1000 Oscillator Frequencey fOSC (kHz) 100 CT=470pF 100 RT=10k RT=33k RT=100k 1 10 CT=1000pF 10 1 1 10 100 1000 Timing Resistor RT (k) 10000 10 100 1000 10000 Timing Capacitor CT (pF) Suuply Current vs. Supply Voltage (Ta=25) 100000 Reference Voltage VREF (V) 2.52 2.51 2.5 2.49 2.48 0 Reference Voltage vs. Operating Voltage (V+=6V,Ta=25C) 10 Suuply Current ICC (mA) 8 6 4 2 0 10 20 + ICCAV ICCLA 30 40 0 10 20 + 30 40 Operating Voltage V (V) Supply Voltage V (V) -6- NJM2383 sTIPICAL CHARACTERISTICS Oscillator Frequency vs. Temperature (V+=6V,RT=33k,CT=1000pF) Reference Voltage vs. Temperature (V+=6V,IOR=1mA) 160 Oscillator Frequency f OSC (kHz) 140 120 100 80 60 3 Reference Voltage VREF (V) 2.8 2.6 2.4 2.2 2 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) L Output Voltage vs. Tenperature (V =6V,ISINK=100mA,RT=33k,CT=1000pF) + -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Supply Current vs. Tenperature (V+=6V,RT=33k,CT=1000pF) 0.5 L Output Voltage VOL (V) 0.4 0.3 0.2 0.1 0 8 Supply Current ICC (mA) 6 4 2 0 -50 -25 0 25 50 75 100 125 150 Anbient Temperature Ta () ICCAV ICCLA -50 -25 0 25 50 75 100 125 150 Ambient Tenperature Ta () 50 Stand-by Current ICCSTBY (A) 40 30 20 10 0 Stand-by Current vs. Temperature (Stand-by Mode,V+=6V,VON/OFF=0V) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) [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. -7- |
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