Universal DC/DC Converter
AP34063
Features • General Description The AP34063 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 is specifically designed for incorporating in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components. Operation from 3.0V to 40V Input • Low Standby Current Limiting • Current • Output Switch Current to 1.6A Voltage Adjustable • Output • Frequency Operation to 100 kHz • Precision 2% Reference Pin Connections SwitchCollectorSwitchEmitterTimingCapacitorGnd (Top View)12348765DriverIpkSenseVCCCollectorComparatorInvertingInput Ordering Information AP34063 X X X XTemp. gradeBlank: 0oC~70oCPackageLead FreePackingS8 : SOP-8LBlank : NormalBlank : TubeN8 : PDIP-8LL : Lead Free PackageA : Taping This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
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Universal DC/DC Converter
AP34063
Maximum Ratings Parameter Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage(VPin 1 = 40V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current (Note 1) Switch Current Power Dissipation and PDIP: TA = 25°C Thermal Characteristics Thermal Resistance SOP: TA = 25°C Thermal Resistance Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range 2.ESD data available upon request. Symbol Value Unit VCC 40 V VIR -0.3 ~ +40 V VC(switch) 40 V VE(switch) 40 V VCE(switch) 40 V VC(driver) 40 V IC(driver) 100 mA ISW 1.6 A PD 1.25 W θJA 100 °C/W PD 600 mW 160 RθJA °C/W TJ +150 °C TA 0 ~ +70 °C Tstg -65 ~ +150 °C Notes: 1.Maximum package power dissipation limits must be observed. Electrical Characteristics (VCC = 5.0V, unless otherwise specified.) Characteristics OSCILLATOR Frequency(VPin 5 =0V, CT =1.0nF, TA =25°C) Charge Current(VCC =5.0V to 40V, TA =25°C) Discharge Current(VCC =5.0V to 40V, TA =25°C) Discharge to Charge Current Ratio(Pin 7 to VCC, TA =25°C) Current Limit Sense Voltage(Ichg = Idischg, TA =25°C) OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection (ISW =1.0A, Pins 1,8 connected) Saturation Voltage, Darlington Connection (ISW =1.0A, ID = 50mA, Forced ß ≈ 20) DC Current Gain(ISW =1.0A, VCE =5.0V, TA =25°C) Collector Off-State Current (VCE =40V) COMPARATOR Threshold Voltage TA = 25°C T = 0oC ~ 75oC Threshold Voltage Line Regulation(VCC =3.0V to 40V) TOTAL DEVICE Supply Current(VCC =5.0V to 40V, CT =1.0nF, Pin 7 = VCC, VPin 5 > Vth Pin 2 = Gnd, remaining pins open) Symbol Min Typ Max Unit kHz fosc 24 33 42 Ichg 24 30 42 µA µA 200 260 Idischg 140 Idischg / Ichg 5.2 6.5 7.5 - 400 450 mV Vipk(sense) 300 1.0 1.3 V VCE(sat) - VCE(sat) - 0.45 0.7 V 75 - - hFE 50 µA IC(off) - 0.01 100 V 1.225 1.25 1.275 1.21 - 1.29 Regline - 1.4 6.0 mV Vth - 3.5 mA ICC - Anachip Corp.
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Universal DC/DC Converter Note: 3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 4.If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( ≤300mA) and high driver currents ( ≥ 30mA), it may take up to 2.0 µs for it to come out of saturation.? This condition will shorten the off time at frequencies ≥ 30kHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended: Forced IC output ß of output switch : ≥ 10 IC driver - 7.0mA* *The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts.
AP34063
Representative Schematic Diagram DriveCollector81SwitchCollectorSQRIpkSense7100Q2Q12SwitchEmitterIpkOscillator6VCCCTComparator+_1.25VReferenceRegulator3TimingCapacitorComparatorInvertingInput54Gnd(Bottom View) Anachip Corp.
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Universal DC/DC Converter Figure 1.Vce(sat) versus leVce(sat), Saturation Voltage (V)1.4
AP34063
Figure 2. Reference Voltage versus Temp.1.261.2Reference Voltage (V)00.20.40.60.811.21.41.61.25511.250.81.2450.61.240102030405060o708090100Ie, Emitter Current (A)Temperature (C)Figure 3. Current Limit Sense Voltageversus Temperature4404.03.53.02.52.01.51.00.50.00102030405060708090100Figure 4. Standby Supply Currentversus Supply VoltageCurrent Sense Voltage (mV)420400380360340320Icc, Supply Current (mA)Temperature (oC)0510152025303540Vcc, Supply Voltage (V)Figure 5. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Currentton-off, Output Switch On-Off Time(us)1.81.75Vcc=2~10VPin1,7,8=VccPin3,5=GNDTA=25oCPin2=5Ω10WFigure 6.Output Switch On-Off Time versusOscillator Timing Capacitor1000VCE(sat), (V)1.71.651.61.551.51.451.4100100VCC = 5.0VPin 7 = VCCPin 5 = GNDTA = 25oCton10toff1300500700IE(mA)9001100130015000.10.01CT, Oscillator Timing Capacitor (nF)0.1110 Anachip Corp.
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Universal DC/DC Converter
AP34063
Application Circuit (1) Step-Up Converter 120uHL8180SQR7Q2Q121N5819IpkRsc0.24Vin12V6+1CTOsc3VCC+_470uFCTComp.1.25VRefReg680pF45R2R110k56kVout28V/200mA470uF+1.0uHVout+CO100Optional Filter Test Conditions Line Regulation Vin =9V to 12V, IO =200mA Load Regulation Vin =12V, IO =50mA to 200mA Output Ripple Vin =12V, IO =200mA Efficiency Vin =12V, IO =200mA Results 20mV = ±0.035% 15mV = ±0.035% 500mVPP 80% Anachip Corp.
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Universal DC/DC Converter (2) Step-Down Converter
AP34063
81SQR7Q2Q12IpkRsc0.11Vin25V470uF++_CTOsc6VCC1N58193CTLComp.1.25VRefReg470pF4R2Vout5.0V/500mA470uF+100uH51.0uHVout+R125k36kCO100Optional Filter Test Line Regulation Load Regulation Output Ripple Efficiency Conditions Vin =12V to 24V, IO =500mA Vin =24V, IO =50mA to 500mA Vin =24V, IO =500mA Vin =24V, IO =500mA Results 20mV = ±0.2% 5mV = ±0.05% 160mVPP 82% Anachip Corp.
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Universal DC/DC Converter (3) Voltage Inverting Converter
AP34063
81SQR7Q2Q12IpkRsc0.26Vin4.5V to 6.0V+LCTOsc100uH6VCC+_31.25VRefReg+470uFComp.680pF1N58195R1R250k3k4Vout-12V/100mA470uF+1.0uHVout+CO100Optional Filter Test Conditions Line Regulation Vin =4.5V to 6.0V, IO =100mA Load Regulation Vin =5.0V, IO =20mA to 100mA Output Ripple Vin =5.0V, IO =100mA Efficiency Vin =5.0V, IO =100mA Results 20mV = ±0.08% 30mV = ±0.12% 500mVPP 60% Marking Information ( Top View)LogoPart Number AC AP34063 YY WW X XBlank: normalL: Lead Free PackageX : Internal code ( Optional)WW: Xth week: 01~52YY : Year: \"01\"=2001 \"02\"=2002~(SOP-8L / PDIP-8L) Anachip Corp.
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Universal DC/DC Converter
AP34063
Package Dimension (1) PDIP-8L DE-PIN O0.118 inchE1E15(4X)PIN #1 INDENT O0.025 DEEP 0.006-0.008 inch7(4X)eBA2ACLBSeB1B2A1 Symbol Dimensions in millimeters Dimensions in inches Min. Nom. Max. Min. Nom. Max. A - - 5.33 - - 0.210 A1 0.38 - - 0.015 - - A2 3.1 3.30 3.5 0.122 0.130 0.138 B 0.36 0.46 0.56 0.014 0.018 0.022 B1 1.4 1.52 1.65 0.055 0.060 0.065 B2 0.81 0.99 1.14 0.032 0.039 0.045 C 0.20 0.25 0.36 0.008 0.010 0.014 D 9.02 9.27 9.53 0.355 0.365 0.375 E 7.62 7.94 8.26 0.300 0.313 0.325 E1 6.15 6.35 6.55 0.242 0.250 0.258 e - 2.54 - - 0.100 - L 2.92 3.3 3.81 0.115 0.130 0.150 eB 8.38 8.89 9.40 0.330 0.350 0.370 S 0.71 0.84 0.97 0.028 0.033 0.038 Anachip Corp.
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Universal DC/DC Converter (2) SOP-8L
AP34063
EHLVIEW \"A\"D7(4X)A2A0.015x457(4X)A1eByCVIEW \"A\" Symbol Dimensions In Millimeters Dimensions In Inches Min. Nom. Max. Min. Nom. Max. A 1.40 1.60 1.75 0.055 0.063 0.069 A1 0.10 - 0.25 0.040 - 0.100 A2 1.30 1.45 1.50 0.051 0.057 0.059 B 0.33 0.41 0.51 0.013 0.016 0.020 C 0.19 0.20 0.25 0.0075 0.008 0.010 D 4.80 5.05 5.30 0.189 0.199 0.209 E 3.70 3.90 4.10 0.146 0.154 0.161 e - 1.27 - - 0.050 - H 5.79 5.99 6.20 0.228 0.236 0.244 L 0.38 0.71 1.27 0.015 0.028 0.050 y - - 0.10 - - 0.004 OOO0 - 8O 0 - 8 θ Anachip Corp.
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Universal DC/DC Converter
AP34063
Design Formula Table Calculation ton /toff Step-Up Vout +VF -Vin(min) Vin(min) - Vsat Step-Down Voltage-Inverting vout +vF Ivout l+vF vin(min) -vsat - vout Vin -vsat (ton + toff) 1/f ton +toff toff ton toff +1 1/f ton +toff ton toff +1 1/f ton +toff ton toff +1 ton (ton +toff)-toff (ton +toff)-toff (ton +toff)-toff CT ton 4.0×10-5 ton 4.0×10-5 ton 4.0×10-52Iout(max) 2Iout(max) (ton /toff +1) Ipk(switch) 2Iout(max) (ton /toff +1) Rsc 0.3/Ipk(switch) 0.3/Ipk(switch) 0.3/Ipk(switch) L(min) (Vin(min) – Vsat ) Ipk(switch) (Vin(min) – Vsat -Vout) (Vin(min) – Vsat ) ton(max) ton(max) ton(max) Ipk(switch) Ipk(switch) 9 Iout ton Vripple(pp) Iout ton Ipk(switch) (toff +ton ) CO 9 8Vripple(pp) Vripple(pp) Vsat = Saturation voltage of the output switch. VF = Forward voltage drop of the output rectifier. The following power supply characteristics must be chosen: Vin -Nominal input voltage. Vout -Desired output voltage, |Vout|=1.25(1+R2/R1) Iout -Desired output current. fmin -Minimum desired output switching frequency at the selected values of Vin and Io. Vripple(pp) -Desired peak-to-peak output ripple voltage, In practice, the calculated capacitor 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. Anachip Corp.
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