NJM2382 SWITCHING REGULATOR CONTROL IC FOR FLYBACK WITH CURRENT SENSE AMPLIFIER GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2382 is a low voltage operation switching regulator control IC. It features totem pole output directly driving external bipolar transistor and operates at high switching frequency which improves transient response. In addition, low power standby function is incorporated. It is suitable for LCD back light, and other portable applications. FEATURES z PWM switching control z Operating Voltage z Wide Oscillator Range z ON/OFF Circuit z Current Sensing Amplifier z Soft-Start Function z UVLO(Under Voltage Lockouts) z Bipolar Technology z Package Outline NJM2382M NJM2382V (3.6 to 32V) (5 to 350 kHz) (High Active) DMP14, SSOP10 PIN CONFIGURATION 1 14 2 13 3 12 4 11 5 10 6 9 7 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 NJM2382M 1 10 2 9 3 8 4 7 5 6 NJM2382V Ver.2012-07-26 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 -1- NJM2382 BLOCK DIAGRAM NC ON/OFF REF CT CS V + NC 14 13 12 11 10 9 8 ON/OFF "High" Active VREF CURRENT SENSE AMP OSC L.O U.V.LO 500 ER*AMP PWM 0.52V 1 2 NC IN 1 - 3 4 5 6 7 - F.B GND OUT NC IN 2 (Package: DMP14) IN+ REF 10 9 CT CS V+ 8 7 6 VREF CURRENT SENSE AMP OSC L.O U.V.LO 500 0.52V 1 - IN 1 ER*AMP PWM 2 3 4 5 - F.B GND OUT IN 2 (Package: SSOP10) -2- Ver.2012-07-26 NJM2382 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL Input Voltage V+ Reference Output Current IOR Output Current IO Differential Input Voltage VID Common Mode Input Voltage VIC ON/OFF Control Voltage VON/OFF Power Dissipation PD Operating Temperature Range Storage Temperature Range MAXIMUM RATINGS 36 10 50 2.5 -0.3 2.5 -0.3 36 (note) (DMP 14) 300 (SSOP 10) 250 -40 +85 -50 +150 TOPR TSTG 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. ELECTRICAL 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 Ver.2012-07-26 IOR=1mA + V =3.6 32V, IOR=1mA IOR=0.1 5.0mA SYMBOL TEST CONDITION RT=33k, CT=1000pF MIN. TYP. MAX. UNIT 2.45 - - 2.50 6.8 5 2.55 20.7 30 V mV mV MIN. TYP. MAX. UNIT 105 1 125 - kHz % fOSC fdV V =3.6 32V 85 - fdT Ta=-40 85C - 5 - % MIN. TYP. MAX. UNIT - - - - - - 7 - 100 - - - mV nA nA dB MHz V 1 V 200 A 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) TEST CONDITION + TEST CONDITION VIO1 IIO1 IB1 AV1 GB1 VICM1 VOM-1 RNF=100k - 2 5 20 90 0.6 0 VREF-0.8 - IOM+1 VOM=0.5V 40 85 -3- NJM2382 ELECTRICAL CHARACTERISTICS (V+=6V,RT=33k,CT=1000pF,VON/OFF=3V,Ta=25C) ERROR AMPLIFIER BLOCK PARAMETER Reference Voltage2 Input Bias Current2 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) Maximum Duty Cycle SYMBOL VB2 IB2 AV2 GB2 VOM-2 RNF=100k IOM+2 VOM=0.5V SYMBOL (CS Pin) Input Threshold Voltage (CS Pin) Input Threshold Voltage (CS Pin) OUTPUT BLOCK PARAMETER H-Output Voltage (OUT Pin) L-Output Voltage (OUT Pin) Output Source Current (OUT Pin) -4- TYP. MAX. UNIT 0.51 - - - - 0.52 5 90 0.6 - 0.53 100 - - 1 V nA dB MHz V 40 85 200 A MIN. TYP. MAX. UNIT duty*cycle=0% - 1.65 1.75 V VTH50 duty*cycle=50% - 1.88 - V Current Sense Amp.=HIGH Error Amp.=HIGH ,CS Pin=1.2V 55 64 85 % MIN. TYP. MAX. UNIT CS Pin=1.8V - 250 650 nA VTHCS0 duty*cycle=0% - 0.25 0.35 V VTHCS50 duty*cycle=50% - 0.52 - V MIN. TYP. MAX. UNIT - - 60 2.70 2.52 180 - - - V V mV TEST CONDITION MIN. TYP. MAX. UNIT RL=10k Output Sink Current=20mA OUT Pin=0V 3.50 - 8 4.00 0.25 11 - 0.65 - V V mA M IBCS UNDER VOLTAGE LOCKOUT BLOCK PARAMETER SYMBOL ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage TEST CONDITION MIN. VTH0 SOFT START CIRCUIT BLOCK PARAMETER SYMBOL Input Bias Current TEST CONDITION TEST CONDITION TEST CONDITION VTHON VTHOFF VHYS SYMBOL VOH VOL ISOURCE Ver.2012-07-26 NJM2382 ELECTRICAL CHARACTERISTICS (V+=6V,RT=33k,CT=1000pF,VON/OFF=3V,Ta=25C) ON/OFF BLOCK PARAMETER SYMBOL OFF Threshold Voltage (ON/OFF Pin) ON Threshold Voltage (ON/OFF Pin) Input Bias Current (ON/OFF Pin) MIN. TYP. MAX. UNIT VOFF - - 0.3 V VON 1.1 - - V - 100 120 A MIN. TYP. MAX. UNIT ION/OFF TEST CONDITION VON/OFF=3V GENERAL CHARACTERISTICS PARAMETER SYMBOL Standby Current Latch Mode Threshold Voltage (CS Pin) Quiescent Current Average Quiescent Current TEST CONDITION ICCSTBY VTHLA Standby Mode, VON/OFF=0V - 1.2 12 1.5 20 1.8 A V ICCLA ICCAV Latch Mode RL= , duty*cycle=50% - - 1.6 3.5 2.2 4.8 mA mA TYPICAL APPLICATIONS + V 330k ON/OFF CONTROL 4.7F 180k 1000pF 36k 2.50V 10 9 ON/OFF "High" Active 8 VREF CURRENT SENSE AMP 7 6 VOUT OSC L.O U.V.LO 500 0.52V 1 ER*AMP PWM 2 3 GND 4 5 (Package:SSOP10) Ver.2012-07-26 -5- NJM2382 TIPICAL CHARACTERISTICS H Output Voltage vs. Source Current + 7 6 5 4 3 2 1 0 1 L Output Voltage VOL (V) H Output Voltage VOH (V) 8 L Output Voltage vs. Sink Current + (V =6V,RT=33k,CT=1000pF,Ta=25C) o (V =6V, RT=33k, CT=1,000pF, Ta=25 C) 0.8 0.6 0.4 0.2 0 0 2 4 6 Source Current I 8 SOURCE 10 (mA) 12 0 (kHz) (kHz) Oscillator Frequency f 100 CT=1,000pF 1 10 100 Timing Resistor R (k) RT=33k RT=100k 1 10 (Ta=25 C) Operating Voltage ICC (mA) Reference Voltage VREF (V) 100000 Operating Current vs. Operating Voltage (Ta=25C) 6 2.51 2.5 2.49 10 20 30 Operating Voltage V+ (V) 100 1000 10000 Timing Capacitor C (pF) T o 0 60 o 10 Reference Voltage vs. Operating Voltage 2.48 50 100 T 2.52 40 (V =6V, Ta=25 C) 1000 OSC OSC Oscillator Frequency f + CT=470pF 10 30 Oscillator Frequency vs. Timing Capacitor o (V =6V, Ta=25 C) 1000 20 Sink Current ISINK (mA) Oscillator Frequency vs. Timing Resistor + 10 40 5 4 ICCAV 3 2 ICCLA 1 0 0 10 20 30 40 + Operating Voltage V (V) -6- Ver.2012-07-26 NJM2382 Maximum Duty Cycle M (%) TIPICAL CHARACTERISTICS Maximum Duty Cycle vs. Oscillator Frequency + (V =6V,Ta=25C) 80 70 60 50 40 30 20 10 0 Duty Cycle (%) 10 100 Oscillator Frequency f OSC (kHz) 1000 Duty Cycle vs. CS Pin Voltage + (V =6V,Ta=25C) 80 70 60 50 40 30 20 10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 CS Pin Voltage VTHCS (V) Ver.2012-07-26 -7- NJM2382 TIPICAL CHARACTERISTICS 140 120 100 80 2.8 2.6 2.4 2.2 2 60 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) H Output Voltage vs. Temperature (V =6V,RL=10k,RT=33k,CT=1000pF) L Output Voltage vs. Trmperature (V =6V,ISINK=20mA,RT=33k,CT=1000pF) + + 0.5 L Output Voltage VOL (V) H Output Voltage VOH (V) 10 8 6 4 2 0.4 0.3 0.2 0.1 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Operating Current vs. Temperature + (V =6V,RT=33k,CT=1000pF) Standby Current vs. Temperature + (Standby Mode,V =6V,VON/OFF=0V) 4 3 ICCAV 2 ICCLA 1 0 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) -8- 50 Standby Current ICCSTBY (A) Operating Current ICC (mA) 0 5 Reference Voltage vs. Temperature + (V =6V,IOR=1mA) 3 Reference Voltage VREF (V) Oscillator Frequency f OSC (kHz) 160 Oscillator Frequency vs. Temperature + (V =6V,RT=33k,CT=1000pF) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Ver.2012-07-26 NJM2382 MEMO [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. Ver.2012-07-26 -9- Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: NJR: NJM2382V-TE1 NJM2382M NJM2382D