AX34063AP

Page No. : 1/7 AX34063AP / AX34063AS DC-to-DC Converter Integrate Circuit Devices Description The AX34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically by Avantics Microelectronics Corp. 8-Lead Plastic DIP-8 Package Code: P • Features • 3V to 40V Input Voltage Operation • Internal 1.6A Peak Current Switch • Internal ±1.8% Reference • Low Quiescent Current at 1.6mA • Frequency Operation from 100Hz~100KHz • Output Voltage Adjustable • Active Current Limiting • Step-Up, Step-Down or Inverting Switching Regulators 8-Lead Plastic SO-8 Package Code: S Pin Connections 8 7 6 5 Pin1: Switch Collector (SWC) Pin2: Switch Emitter (SWE) Pin3: Timing Capacitor (TC) Pin5: Comparator Inverting Input (FB) Pin6: Voltage Supply (Vcc) Pin7: Ipk Sense (Ipk) Pin8: Voltage Driver Collector (DRC) 1 2 3 4 Pin4: Ground (GND) Absolute Maxium Rating Parameter Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage Switch Emitter to Collector Voltage Driver Collector Voltage Switch Current Power Dissipation at TJ=20oC Operating Ambient Temperature Range Storage Temperature Range Operating Junction Temperature Thermal Resistance Junction-ambient Symbol VCC Vir VC(SW) VSWE VCE VC(DR) ISW PD Topr Tstg Topj θJA DIP-8 SO-8 0~+70 -65~+150 120 125 o Value 40 -0.3~+40 40 40 40 40 1.5 1.25 0.625 Unit V V V V V V A W o o o C C C C/W AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 2/7 Electrical Characteristics (V Parameter Oscillator Charging Current Discharge Current Frequency Discharge to Charge Current Ratio Current Limit Sense Voltage Output Switch Saturation Voltage, Darlington Connection Saturation Voltage DC Current Gain Collector Off-State Current Comparator Threshold Voltage Threshold Voltage Line Regulation Input Bias Current Total Device Supply Current CC =5V,TA=0~70°C, unless otherwise specified) Test Condition VCC=5~40V, Ta=25oC VCC=5~40V, Ta=25 C VPIN5=0, CT=1nF, Ta=25 C VPIN7=VCC, Ta=25oC Idischg=Ichg, Ta=25oC o o Symbol Ichg Idischg fOSC Idischg/Ichg VIPK Min. 10 140 28 5.2 250 Typ. 25 190 33 6 300 Max. 40 240 40 7.5 350 Unit uA uA KHz mV VCE(sat) 1 VCE(sat) 2 hFE ICC(off) VFB ∆VFB IIB ISW=1A, VC(SW)=VC(DR) ISW=1A, IC(DR)=50mA ISW=1A, VCE=5V VCE=40V, Ta=25oC 35 1.23 1 0.4 120 10 1.25 1.5 40 1.3 0.7 100 1.27 6 400 V V uA V mV nA VCC=5~40V VIN=0V VCC=5~40V, VPIN7=VCC, VPin5>VFB, CT=0.001uF, Pin7=GND, Remaining pins open - ICC - 1.6 3 mA Block Diagram SC Pin1: 1.6A Switch Collector Q2 Q1 80Ω SE Pin2: Darlington Switch Emitter IPK Oscillator TC Pin3: Oscilletor Timing Capacitor 1.25V Reference Voltage GND Pin4: Power GND Comparator Q S R DRI Pin8: Driver Collector IPK Pin7: Highside Current Sense Input, VCC-VIPK=300mV CT VCC Pin6: Power Supply Input + FB Pin5: Feedback Comparator Inverting Input AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 3/7 Application Information Design Formula Table Calculation ton/toff (ton+toff) max CT IC(sw) RS L(min) CO Step-Down (Vout+VF)/(Vin(min) -Vsat-Vout) 1/Fmin 4*10 ton 2*Iout(max) 0.3/IC(sw) (Vin(min)-Vsat/Ipk(sw))*ton(max) (Ipk(sw)*(ton+toff))/(8*Vripple(P-P)) -5 Step-Up (Vout+VF-Vin(min))/(Vin(min)-Vsat) 1/Fmin 4*10 ton 2*Iout(max)(ton+toff/toff) 0.3/IC(sw) (Vin(min)-Vsat/Ipk(sw))*ton(max) Iout*ton/Vripple(P-P) -5 Voltage-Inverting (|Vout|+VF)/(Vin(max)-Vsat) 1/Fmin 4*10-5ton 2*Iout(max)(ton+toff/toff) 0.3/IC(sw) (Vin(min)-Vsat/Ipk(sw))*ton(max) Iout*ton/Vripple(P-P) Vsat: Saturation voltage of the output switch. VF: Forward voltage drop of the ringback rectifier. The following power supply characteristics must be chosen: Vin: Nominal input voltage. Vout: Desired output voltage. |Vout|=1.25*(1+RB/RA) Iout: Desired output current Fmin: Minimum desired output switching frequency at the selected values for Vin and Iout. Vripple(P-P): Desired peak to peak output ripple voltage in practice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly effect the line and load regulation. AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 4/7 Application Information (Continuos) Fig.2 Step-Up Converter L1 R1 150Ω RSC 0.22 Vin 200uH D1 Vout 28V / 200mA H1N5819 Cout 220uF AX34063A 8 7 1 2 3 4 RB C1 100uF 6 5 CT 680pF RA 2.2kΩ 47kΩ Line Regulation: 100mV (Vin=8V~16V, @IO=200mA) Load Regulation: 5mV (Vin=12V, @IO=80mA~200mA) Fig.3 Step-Up Converter With External NPN Switch L1 R1 RSC Vin C1 D1 Vout AX34063A 8 7 6 5 RB 1 2 3 4 CT R2 Q1 Cout RA Fig.4 Step-Down Converter L1 AX34063A RSC 0.25 200uH Vout 5V / 500mA Cout 470uF 8 7 6 5 RB 3.6kΩ RA 1.2kΩ 1 2 3 4 CT 470pF D1 H1N5819 Vin C1 100uF Line Regulation: 40mV (Vin=10V~20V, @IO=500mA) Load Regulation: 5mV (Vin=15V, @IO=10mA~500mA) Short Circuit Current: 1.3A (Vin=15V, @RL=0.1Ω AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 5/7 Fig.5 Step-Down Converter With External PNP Saturation Switch AX34063A 8 RSC Vin 7 6 5 RB RA 1 2 3 4 R2 R1 Q1 L1 Vout Cout CT D1 C1 Fig.6 Voltage Inverting Converter D1 Vout -12V / 100mA H1N5819 AX34063A RSC 0.25 Vin 4.5V-6V 8 7 6 5 RA RB 8.2kΩ 953Ω 1 2 3 4 CT 680pF L1 100uH Cout 470uF C1 100uF Line Regulation: 20mV (Vin=4.5V~6V, @IO=100mA) Load Regulation: 100mV (Vin=5V, @IO=10mA~100mA) Fig.7 Voltage Inverting Converter With External PNP Saturation Switch AX34063A RSC Vin 8 7 6 5 RA C1 RB 1 2 3 4 R1 R2 Q1 L1 CT D1 Vout Cout AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 6/7 DIP-8 Dimension Marking: 8 7 6 5 Pb Free Mark A 1 2 3 4 Pb-Free: " . " (Note) Normal: None AX 34063A P Date Code Control Code B F J Note: Green label is used for pb-free packing Pin Style: 1.SWC 2.SWE 3.TC 4.GND 5.FB 6.VCC 7.Ipk 8.DRC Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 C E D G H α1 K M L DIM A B C D E F G H I J K L M α1 Min. 6.29 9.22 3.25 3.17 0.38 2.28 7.49 8.56 0.229 94o Max. 6.40 9.32 *1.52 *1.27 *0.99 3.35 3.55 0.53 2.79 7.74 *3.00 8.81 0.381 97o *: Typical, Unit: mm I 8-Lead DIP-8 Plastic Package AVANTICS Package Code: P SO-8 Dimension A G Marking: Pb Free Mark Pb-Free: " . " (Note) A X Normal: None 8 B 7 6 5 C 4 J H I S 34063A Control Code Pin 1 Index Date Code Pin1 Index 2 3 Note: Green label is used for pb-free packing Pin Style: 1.SWC 2.SWE 3.TC 4.GND 5.FB 6.VCC 7.Ipk 8.DRC D E Part A K L N O Part A M Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 DIM A B C D E F G H I J K L M N O Min. 4.85 3.85 5.80 1.22 0.37 3.74 1.45 4.80 0.05 0.30 0.19 0.37 0.23 0.08 0.00 Max. 5.10 3.95 6.20 1.32 0.47 3.88 1.65 5.10 0.20 0.70 0.25 0.52 0.28 0.13 0.15 *: Typical, Unit: mm F 8-Lead SO-8 Plastic Surface Mounted Package AVANTICS Package Code: S Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of AVANTIC. • AVANTICS reserves the right to make changes to its products without notice. • AVANTICS semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • AVANTICS assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office: • AVANTICS Microelectronics Corp: No. 255, Cai Lun Rd. Zhangjiang Technology Industrial Park Pudong, Shanghai, China Tel: 86-021-58955599 Fax: 86-021-58558038 AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 7/7 Soldering Methods for AVANTICS’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface-mount devices Figure 1: Temperature profile tP TP Ramp-up TL Tsmax Temperature tL Critical Zone TL to TP Tsmin tS Preheat Ramp-down 25 t 25oC to Peak Time Profile Feature Average ramp-up rate (TL to TP) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) Tsmax to TL - Ramp-up Rate Time maintained above: - Temperature (TL) - Time (tL) Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp-down Rate Time 25oC to Peak Temperature 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices. Sn-Pb Eutectic Assembly