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NJW4141 Dataheets PDF



Part Number NJW4141
Manufacturers New Japan Radio
Logo New Japan Radio
Description 2-phase Boost Converter Switching Regulator IC
Datasheet NJW4141 DatasheetNJW4141 Datasheet (PDF)

Automotive NJW4141 2 - phase Boost Converter Switching Regulator IC GENERAL DESCRIPTION The NJW4141 is a 2-phase boost converter switching regulator IC that operates wide input range from 3V to 40V. It can optimize applications by external phase compensation and voltage mode control. The digital phase shifter adds 180 degree phase shift signal to the PWM signal and controls boost circuit by 2-phase operation. The 2-phase operation reduces an input ripple current and realizes large output curre.

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Automotive NJW4141 2 - phase Boost Converter Switching Regulator IC GENERAL DESCRIPTION The NJW4141 is a 2-phase boost converter switching regulator IC that operates wide input range from 3V to 40V. It can optimize applications by external phase compensation and voltage mode control. The digital phase shifter adds 180 degree phase shift signal to the PWM signal and controls boost circuit by 2-phase operation. The 2-phase operation reduces an input ripple current and realizes large output current applications. It has a pulse-by-pulse over current protection circuit that limits an output current at over load. When recovering from abnormal load condition, switching operation restarts automatically. The NJW4141 suitable for large output current application such as a boost power supply of audio amplifier and a boost application from battery unit. ■ PACKAGE OUTLINE NJW4141VC3-T1 FEATURES 2-phase Boost Converter Application Correspond to Operating Temperature 125 C Nch MOSFET Driving Driving Voltage 5.1V typ. Wide Operating Voltage Range 3V to 40V PWM Control Wide Oscillating Frequency 50kHz to 500kHz Adjustable Soft Start Function Dead Time Control UVLO (Under Voltage Lockout) Over Current Protection Standby Function Package Outline NJW4141VC3-T1 : SSOP20-C3 Ver.2016-02-22 -1- Automotive NJW4141 PIN CONFIGURATION OUT1 1 SENSE1 2 REG_DRV1 3 PGND 4 AGND 5 VREG1.5 CT DTC 6 7 8 FB 9 IN- 10 (Top View) 20 OUT2 19 SENSE2 18 REG_DRV2 17 N.C. 16 V+ 15 ON/OFF 14 SS 13 VREG5 12 N.C. 11 RDIV_SW NJW4141VC3-T1 BLOCK DIAGRAM V+ ON/OFF High: ON Low : OFF(Standby) 400k UVLO Standby ON/OFF 2.5V Regulator 5V Regulator Internal Pow er Supply CT VREG1.5 IN- 1.5V Regulator Vref 1V OSC Error AMP CLOCK OSC FB DTC SS Max Duty Setting Soft Start Setting PWM Comparator Digital Phase Shif ter 5V Regulator RDIV_SW VREG5 Pulse by Pulse Pulse by Pulse Driver 1 Over Current Sense 1 V IPK1 Driver 2 Over Current Sense 2 V IPK2 REG_DRV1 OUT1 SENSE1 REG_DRV2 OUT2 SENSE2 AGND PGND -2- Ver.2016-02-22 Automotive NJW4141 ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER Supply Voltage SYMBOL V+ MAXIMUM RATINGS +45 UNIT V OUT pin Voltage (*1) REG_DRV pin Voltage (*1) VREG1.5 pin Voltage VREG5 pin Voltage IN- pin Voltage DTC pin Voltage SENSE pin Voltage (*1) CT pin Voltage SS pin Voltage ON/OFF pin Voltage RDIV_SW pin Voltage OUT pin Peak Current (1*) Power Dissipation Operating Temperature Range Storage Temperature Range VOUT VREG_DRV VREG1.5 VREG5 VINVDTC VSENSE VCT VSS VON/OFF VRDIV_SW IO_PEAK+ IO_PEAK- PD Topr Tstg -0.3 to +5.95 (*2) -0.3 to +5.95 (*2) +1.8 (*2) +5.7 (*2) +2.8 (*2) +2.8 (*2) +2.8 (*2) +2.8 (*2) +2.8 (*2) +45 +45 1,000 (Source) 900 (Sink) 1,000 (*3) 1,500 (*4) -40 to +125 -40 to +150 V V V V V V V V V V V mA mW C C (*1): Common to each channel. (*2): When Supply voltage is less than each absolute maximum voltage, the absolute maximum voltage is equal to the Supply voltage. (*3): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers) (*4): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers), internal Cu area: 74.2×74.2mm RECOMMENDED OPERATING CONDITIONS (Ta= -40 C to +125 C) PARAMETER SYMBOL MIN. TYP. Supply Voltage V+ 3 - Timing Capacitor Oscillating Frequency CT 270 - fOSC 50 - MAX. 40 3,300 500 UNIT V pF kHz Ver.2016-02-22 -3- Automotive NJW4141 ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL (Unless otherwise noted, V+=VON/OFF=12V, CT=470pF, Ta=25 C) TEST CONDITION MIN. TYP. MAX. UNIT Under Voltage Lockout Block ON Threshold Voltage VT_ON OFF Threshold Voltage VT_OFF V+= L → H V+= L → H, Ta= -40 C to +125 C V+= H → L V+= H → L, Ta= -40 C to +125 C 2.65 2.8 2.95 2.65 – 2.95 2.4 2.55 2.7 2.35 – 2.8 V V Oscillator Block Oscillating Frequency1 Oscillating Frequency2 Charge Current Discharge Current Voltage amplitude Oscillating Frequency deviation (Supply voltage) fOSC1 CT=470pF CT=470pF, Ta= -40 C to +125 C 270 260 300 – 330 330 kHz fOSC2 CT=1,500pF CT=1,500pF, Ta= -40 C to +125 C 90 80 100 – 110 120 kHz Ichg Ta= -40 C to +125 C 150 200 250 140 – 260 A Idis Ta= -40 C to +125 C 150 200 250 140 – 260 A VOSC – 0.7 – V fDV V+=3V to 40V – 3 –% Soft Start Block Charge Current (SS pin) Threshold Voltage (SS pin) Threshold Voltage (SS pin) Ichg_SS Ta= -40 C to +125 C 1.6 2 2.4 1.6 – 2.4 VTHSS0 Duty1,2=0% Duty1,2=0%, Ta= -40 C to +125 C 0.41 0.39 0.49 – 0.57 0.59 VTHSS85 Duty1,2=80% Duty1,2=80%, Ta= -40 C to +125 C 0.92 0.87 1.1 – 1.28 1.33 A V V Error Amplifier Block Reference Voltage Input Bias Current Open Loop Gain Gain Bandwidth Output Source Current Output Sink Current VB Ta= -40 C to +125 C IB Ta= -40 C to +125 C AV GB VFB=1V, VIN-=0.9V IOM+ VFB=1V, VIN-=0.9V, Ta= -40 C to +125 C VFB=1V, VIN-=1.1V IOM- VFB=1V, VIN-=1.1V, Ta= -40 C to +125 C -1.0% -2.0% 1.00 +1.0% – +2.0% V -0.1 -0.1 – – 0.1 0.1 A – 80 – dB – 1.5 – MHz 40.


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