NJM2374A NJM2374A DC/DC IC PWM 1.5A NJM2374AD NJM2374AE (2.5V40V) NJM2374AE (2.5V48V) (100Hz100kHz) (1.5A max.) PWM DIP8, DMP8, EMP8, SSOP14 NJM2374AM NJM2374AV 1 8 2 7 3 6 4 5 1.CS 2.ES 3.CT 4.GND 5.IN+ 6.V+ 7.SI 8.CD 1.CS 2.NC 3.ES 4.NC 5.CT 6.NC 7.GND 8.IN+ 9.NC 10.V+ 11.NC 12.SI 13.NC 14.CD NJM2374AD NJM2374AM NJM2374AE 1 14 2 13 3 12 4 11 5 10 6 9 7 8 NJM2374AV Ver 4.2 - 1 - NJM2374A CS 1 Q 8 CD 7 SI 6 V+ 5 IN+ S PWM 1.5A R 160 ES 2 Vth=300mV ON 9:1 OSC Ipk Sense CT 3 PWM COMP Vref 1.25V 2% GND 4 ERR.AMP (DIP8, DMP8, EMP8: PACKAGE) CS 1 Q NC 2 PWM 1.5A 14 CD 13 NC 12 SI 11 NC 10 V+ 9 NC 8 IN+ S R 160 ES 3 NC 4 CT 5 ON 9:1 OSC Vth=300mV Ipk Sense PWM COMP NC 6 Vref 1.25V 2% GND 7 ERR.AMP (SSOP14: PACKAGE) -2- NJM2374A (Ta=25) V+ ISW 40 (NJM2374AE: 48V) 1.5 40 (NJM2374AE: 48V) -0.340 (NJM2374AE: -0.348V) (DIP8) 875 (DMP8) 750 (EMP8) 1,000 (SSOP14) 375 -40+85 -50+150 VSW VIR PD Topr Tstg V A V V mW DMP8, EMP8 6V - Topr=-40+85,Tj=+150 1200 NJM2374AE PD (mW) 1000 NJM2374AD 800 600 NJM2374AM 400 NJM2374AV 200 0 25 50 75 100 Ta () SSOP -3- NJM2374A (V+=5V, Ta=25) ICC1 (NJM2374AE ) Ichg Idis VOSC Iratio Vipk Vsat1 Vsat2 Rbias hFE IC(Off) Vth IIB ICC2 + + CT=1nF, SI=V , IN Vth, ES=GND V+=48V, CT=1nF, SI=V+, IN+Vth, ES=GND SI=V+ Ichg=Idis (CS=CD),ISW =0.7A ISW =0.7A,Ic(driver)=50mA (Forced 14) ISW =0.7A,VCE=5.0V VCE=40V (NJM2374AE: VCE=48V) IN+=0V - 2.8 4.0 mA - 3.4 4.5 mA 12 110 - - 250 - 20 180 0.5 9 300 1.0 30 300 - - 350 1.3 A A VP-P - mV V - 0.5 0.7 V - 35 - 1.225 - 160 120 10 1.250 40 - - - 1.275 400 - nA V nA High Voltage Detect HIGH OSC FF LOW OFF -4- ON Current-Limit Active Point NJM2374A ON/OFF tON / t OFF (S) f OSC (kHz) 1000 ON/OFF (V+=5V,SI=V+,Pin5=GND,Ta=25) 1000 (V+=5V,SI=V+,Pin5=GND,Ta=25) 100 10 100 tON 10 tOFF 1 100 1000 1 100 10000 CT (pF) Vsat2 (V) 2 (V+=5V,Ic(driver)=50mA,14,Ta=25) 2 1.5 1 0.5 1.5 1 0.5 0 0 0 0.5 1 1.5 IC (A) 4 I CC (mA) Vsat1 (V) 10000 CT (pF) 1 (V+=5V,CS=CD,Ta=25) 2 1000 2 0 0.5 1 1.5 IC (A) 2 (CT=1nF,SI=V+,IN+>Vth,ES=GND,Ta=25) 3 2 1 0 0 5 10 15 20 25 30 35 40 V+ (V) -5- NJM2374A 1.3 (V+=5V,SI=V+) 10 I ratio Vth (V) (V+=5V) 1.28 1.26 1.24 1.22 9 8 7 6 -50 -25 0 25 50 75 100 125 150 -50 -25 0 Ta () (V+=5V,CS=CD,ISW =0.7A) 1.1 Vsat2 (V) Vsat1 (V) (V+=5V,ISW =0.7A,Ic(driver)=50mA,14) 0.8 1.2 1 0.9 0.8 0.7 0.6 25 50 75 100 125 150 Ta () 0.6 0.4 0.2 0 -50 -25 0 25 50 75 100 125 150 -50 -25 0 Ta () 25 (V =5V,CT=1nF,SI=V+,IN+>Vth,ES=GND) I CC (mA) 4 3 2 1 0 -50 -25 0 25 50 75 100 125 150 Ta () -6- 75 100 125 150 Ta () + 5 50 NJM2374A VIN=25V RSC 0.22 L1 220H VOUT=5.0V 1 8 2 7 NJM2374A R2 3.6k 5 6 4 CIN 100F 3 CT 470pF R1 1.2k D1 COUT 470F 6V VIN=14V RSC 0.22 D1 L1 180H VOUT=30V COUT 150F RC 180 R2 46k 8 1 7 2 NJM2374A 6 5 4 3 CIN 100F R1 2k CT 1500pF VIN=5V RSC 0.22 D1 8 7 2 NJM2374A R2 953 6 5 4 CIN 100F VOUT=-12V 1 3 CT 1300pF L1 90H R1 8.2k COUT 1000F D1 (SBD) SSOP -7- NJM2374A VIN=20V RSC 0.05 RBE 75 RBC 300 2SA1010 VOUT=10V L1 33H 8 1 7 2 NJM2374A R2 70k 6 5 4 3 CIN 300F CT 330pF D1 R1 10k COUT 300F VIN=5V RSC 0.075 L1 22H D1 VOUT=7V RC1 100 RC2 680 COUT 940F R2 46k 8 1 2SC3255 2 7 NJM2374A 5 6 4 CIN 940F 3 CT 330pF RBE 220 R1 10k D1 (SBD) -8-