PJ34063 Dc To Converter Controller T h e P J 3 4 0 6 3 S eri es i s a m o n l t h i c co n t ro l circuit containing the primary functions required for DC to DC onverters. These devices consist of an DIP -8 SOP -8 internal duty cycle oscillator with an active current limit circuit, drive and a high current output switch. This series was specifically designed to be incorporated in step-up, step- down and voltage-inverting applications with a minimum number of external components. temperature compensated P in : 1. Switch Collector 3. Timing Capacitor 5. Comparator Inverting Input 7. IP K Sense reference,comparator,controlled FEATURES • Operation from 3 to 40V input • Low standby current • Current limiting • Output switch current to 1.5A • Precision 2% reference • Output - voltage adjustable • Frequency of operation from 100Hz to 100KH 2. Switch Emitter 4. Gnd 6. Vcc 8. Driver Collector ORDERING INFORMATION Device PJ34063CD PJ34063CS Operating temperature -20℃～+85℃ Packagge DIP-8 SOP-8 BLOCK DIAGRAM 1-8 2002/01.rev.A PJ34063 Dc To Converter Controller ABSOLUTE MAXIMUM RATINGS Characte ristic Symbol Value Unit Power Supply Voltage VCC 40 Vdc Comparator Input Voltage Range VIR -0.3 ~ +40 Vdc Switch Collector Voltage VC(SW) 40 Vdc Switch Emitter Voltage VE(SW) 40 Vdc Switch Collector to Emitter Voltage VCE(SW) 40 Vdc Driver Collector Voltage VC(drive) 40 Vdc Drive Collector Current (Note 1) IC(drive) 100 mA Switch Current Isw 1.5 A Operating Junction Temperature TJ +150 ℃ Operating Ambient Temperature Range TA -20 to +85 ℃ Tstg -65 to +150 ℃ Storage Temperature Range ELECTRICAL CHARACTERISTICS (VCC = 5.0V. Ta= Tlow to Thigh. unless otherwise specified) Characte ristic Symbol Te st Condition Min Typ Max Unit OSCILLATOR Frequency fosc VPIN5=0V, C T =1.0nF , T A=25℃ 24 33 42 KHz Charging Current Ichg VCC=5 to 40V, T A=25℃ 24 35 42 μA Discharge Current Idischg VCC=5 to 40V, T A=25℃ 140 220 260 μA Idischg/ Ichg Pin7 to VCC , T A=25℃ 5.2 6.5 7.5 - VIPK(sense) Ichg = Idischg, T A=25℃ 250 300 350 mV VCE(sat) Isw=1.0A, Pins1,8 connected - 1.0 1.3 V VCE(sat) Isw=1.0A, R PIN8=82Ω to Vcc, - 0.45 0.7 V 50 75 - - - 40 100 μA 1.23 1.25 1.27 V VCC = 3 to 40V 1.4 5.0 mV -20 -400 nA - 4.0 mA Discharge To Charge Current Ratio Current Limit Sense Voltage OUTPUT SWITCH(NOTE 2) Saturation Voltage , Darlington Connection Saturation Voltage , Darlington Forced β≌20 Connection DC Current Gain hFE Isw=1.0A, VCE = 5.0V, T A=25℃ Collector Off- State Current IC(off) VCE =40V Threshold Voltage VTH T A=25℃ Threshold Voltage Line Regulation Regline Input Bias Current IIB VIN=0V ICC VCC=5 to 40V, C T =1.0nF, Pin7=Vcc ,VPIN 5>Vth Pin 2 =GND, remaining pins open COMPARATOR TOTAL DEVICE Supply Current - Notes : 1.Maximum package power dissipation limits must be observed. 2.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 2-8 2002/01.rev.A PJ34063 Dc To Converter Controller FIGURE 1.OUTPUT SWITCH ON-OFF TIME versus OSCILLATOR TIMING CAPACITOR FIGURE 2.TIMING CAPACITOR WAVEFORM FIGURE 3.EMITTER FOLLOWER CONFIGURATION OUTPUT SATURATION VOLTAGE versus EMITTER CURRENT FIGURE 4.COMMON EMITTER CONFIGURATION OUTPUT SWITCH SATURATION VOLTAGE versus COLLECTOR CURRENT FIGURE 5.CURRENT LIMIT SENSE VOLTAGE versus TEMPERATURE FIGURE 6.STANDBY SUPPLY CURRENT versus SUPPLY VOLTAGE 3-8 2002/01.rev.A PJ34063 Dc To Converter Controller FIGURE 1.STEP-UP CONVERTER FIGURE 2.EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 2a.EXTERNAL NPN SWITCH 2b.EXTERNAL NPN SATURATED SWITCH 4-8 2002/01.rev.A PJ34063 Dc To Converter Controller FIGURE 3.STEP-DOWN CONVERTER FIGURE 4.EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 4a.EXTERNAL NPN SWITCH 4b.EXTERNAL NPN SWITCH 5-8 2002/01.rev.A PJ34063 Dc To Converter Controller FIGURE 5.VOLTAGE INVERTING CONVERTER FIGURE 6.EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 6a.EXTERNAL NPN SWITCH 6b.EXTERNAL NPN SATURATED SWITCH 6-8 2002/01.rev.A PJ34063 Dc To Converter Controller Table : De sign Formula Calculation ton toff (ton+toff) max CT Ipk(switch) Rsc L (min) Co Step-Up Vout+VF -Vin(min) VCC(min)-Vsat-Vout Step-Down VOUT +VF VCC(min)-Vsat-Vout 1 f min 1 f min 4.0×10-5 ton ton 2Iout(max) +1 toff 0.3/IPK(switch) Vin(min) − Vsat = ton(max) Ipk (switch ) 1 f min 4.0×10-5 ton 2Iout(max) 0.3/IPK(switch) Vin (min) − Vsat − Vout Ipk (switch ) Ioutton 9 Vripple( pp) Voltage-Inverting │Vout│ +VF VCC + Vsat = ton(max) Ipk ( switch)(ton + toff ) 8Vripple( pp ) 4.0×10-5 ton 2Iout(max) ton +1 toff 0.3/IPK(switch) Vin(min) − Vsat = ton(max) Ipk (switch) Ioutton 9 Vripple( pp) TERMS AND DEFINITIONS ♦ Vsat = Saturation Voltage of the output switch. ♦ VF = Forward Voltage drop of the rectifier. The following power supply characteristics must be chosen: ♦ Vin= Normal input voltage ♦ Vout: Desied Output voltage, |Vout|=1.25 (1+ ♦ Iout : Desired output current. ♦ fmin : Minimum desired output switching frequency at the selected values for Vin and.Io. R2 ) R1 ♦ Vripple(p-p): Desired peak-to-peak output ripple voltage. in practice, the calculated capaitor value will need to be increased due to its equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. 7-8 2002/01.rev.A PJ34063 Dc To Converter Controller DIM A B C D G J K L M DIM A B C D F G K M P R 8-8 MILLIMETERS MIN MAX 9.07 9.32 6.22 6.48 3.18 4.43 0.35 0.55 2.54BSC 0.29 0.31 3.25 3.35 7.75 8.00 10° MILLIMETERS MIN MAX 8.55 8.75 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27BSC 0.10 0.25 0° 7° 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.357 0.367 0.245 0.255 0.125 0.135 0.019 0.020 0.10BSC 0.011 0.012 0.128 0.132 0.305 0.315 10° INCHES MIN MAX 0.337 0.344 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.05BSC 0.004 0.009 0° 7° 0.229 0.244 0.010 0.019 2002/01.rev.A