AP34063 Universal DC/DC Converter General Description Features • • • • • • • 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 Current Limiting Output Switch Current to 1.6A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference Pin Connections (Top View) Switch Collector 1 8 Driver Switch Emitter 2 7 I pk Sense Timing Capacitor 3 6 VCC Collector 4 5 Comparator Inverting Input Gnd Ordering Information AP34063 X X X X Temp. grade Blank: 0oC~70oC Lead Free Package Packing S8 : SOP-8L Blank : Normal Blank : Tube N8 : PDIP-8L L : Lead Free Package A : 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. Rev.A5 Feb.10, 2004 1/10 AP34063 Universal DC/DC Converter 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 Notes: Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW PD θJA PD RθJA TJ TA Tstg Value 40 -0.3 ~ +40 40 40 40 40 100 1.6 1.25 100 600 160 +150 0 ~ +70 -65 ~ +150 Unit V V V V V V mA A W °C/W mW °C/W °C °C °C 1.Maximum package power dissipation limits must be observed. 2.ESD data available upon request. 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) Anachip Corp. www.anachip.com.tw Symbol Min Typ Max Unit fosc Ichg Idischg Idischg / Ichg Vipk(sense) 24 24 140 5.2 300 33 30 200 6.5 400 42 42 260 7.5 450 kHz µA µA mV VCE(sat) - 1.0 1.3 V VCE(sat) - 0.45 0.7 V hFE IC(off) 50 - 75 0.01 100 µA 1.225 1.25 Regline 1.21 - 1.4 1.275 1.29 6.0 mV ICC - - 3.5 mA Vth V Rev.A5 Feb.10, 2004 2/10 AP34063 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 ß of output switch : IC output ≥ 10 IC driver - 7.0mA* *The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts. Representative Schematic Diagram Drive Collector 8 S Q 7 Comparator 3 Timing Capacitor 1.25V Reference Regulator + _ Comparator Inverting Input Switch Emitter CT 6 VCC 2 Q1 100 Ipk Oscillator Switch Collector Q2 R Ipk Sense 1 5 4 Gnd (Bottom View) Anachip Corp. www.anachip.com.tw Rev.A5 Feb.10, 2004 3/10 AP34063 Universal DC/DC Converter Figure 1. Vce(sat) versus le Figure 2. Reference Voltage versus Temp. 1.26 Reference Voltage (V) Vce(sat), Saturation Voltage (V) 1.4 1.2 1 0.8 0.6 1.255 1.25 1.245 1.24 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 0 10 20 30 Ie, Emitter Current (A) Figure 3. Current Limit Sense Voltage versus Temperature 60 70 80 90 100 4.0 Icc, Supply Current (mA) Current Sense Voltage (mV) 50 Figure 4. Standby Supply Current versus Supply Voltage 440 420 400 380 360 340 3.5 3.0 2.5 2.0 1.5 1.0 0.5 320 0.0 0 10 20 30 40 50 Temperature 60 70 80 90 100 0 (oC) 1.65 Vcc=2~10V Pin1,7,8=Vcc Pin3,5=GND TA=25oC Pin2=5 Ω10W 1.6 1.55 1.5 1.45 1.4 100 15 20 25 30 35 40 1000 ton-off, Output Switch On-Off Time(us) 1.7 10 Figure 6.Output Switch On-Off Time versus Oscillator Timing Capacitor 1.8 1.75 5 Vcc, Supply Voltage (V) Figure 5. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Current VCE ( sat), (V) 40 Temperature (oC) 300 500 700 900 IE(mA) 1100 1300 100 Anachip Corp. www.anachip.com.tw ton 10 t off 1 0.1 0.01 1500 VCC = 5.0V Pin 7 = VCC Pin 5 = GND TA = 25oC 0.1 1 CT, Oscillator Timing Capacitor ( nF) 10 Rev.A5 Feb.10, 2004 4/10 AP34063 Universal DC/DC Converter Application Circuit (1) Step-Up Converter 120uH L 8 1 180 S Q Q2 R Q1 7 2 1N5819 Ipk CT Rsc 0.24 Osc 3 6 Vin 12V VCC + 470 uF CT + _ Comp. 1.25V Ref Reg 5 680 pF 4 Vout 28V/200mA R2 R1 10k 56k 470uF + 1.0uH Vout + CO 100 Optional Filter Test Line Regulation Load Regulation Output Ripple Efficiency Conditions Vin =9V to 12V, IO =200mA Vin =12V, IO =50mA to 200mA Vin =12V, IO =200mA Vin =12V, IO =200mA Anachip Corp. www.anachip.com.tw Results 20mV = ± 0.035% 15mV = ± 0.035% 500mVPP 80% Rev.A5 Feb.10, 2004 5/10 AP34063 Universal DC/DC Converter (2) Step-Down Converter 8 1 S Q Q2 R Q1 7 2 Ipk CT Rsc 0.11 1N5819 Osc 6 Vin 25V 3 VC CT L C 470 uF + + _ Comp. 1.25V Ref Reg 100uH 470 pF 5 4 Vout 5.0V/500mA R2 R1 25k 36k 470uF + 1.0uH Vout + CO 100 Optional 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 Anachip Corp. www.anachip.com.tw Results 20mV = ± 0.2% 5mV = ± 0.05% 160mVPP 82% Rev.A5 Feb.10, 2004 6/10 AP34063 Universal DC/DC Converter (3) Voltage Inverting Converter 8 1 S Q Q2 R Q1 7 2 Ipk 100 uH L CT Rsc 0.26 Osc 6 Vin 4.5V to 6.0V 3 VC C + + _ 470uF Comp. + 1.25V Ref Reg 5 680 pF 1N5819 4 R2 50k 1.0uH Vout -12V/100mA R1 3k 470uF + Vout CO + 100 Optional Filter Test Line Regulation Load Regulation Output Ripple Efficiency Conditions Vin =4.5V to 6.0V, IO =100mA Vin =5.0V, IO =20mA to 100mA Vin =5.0V, IO =100mA Vin =5.0V, IO =100mA Results 20mV = ± 0.08% 30mV = ± 0.12% 500mVPP 60% Marking Information ( Top View) Logo Part Number AC AP34063 YY WW X X Blank: normal L: Lead Free Package X : Internal code ( Optional) WW: Xth week: 01~52 YY : Year: "01"=2001 "02"=2002 ~ (SOP-8L / PDIP-8L) Anachip Corp. www.anachip.com.tw Rev.A5 Feb.10, 2004 7/10 AP34063 Universal DC/DC Converter Package Dimension (1) PDIP-8L D E1 E-PIN O0.118 inch E 15 (4X) PIN #1 INDENT O0.025 DEEP 0.006-0.008 inch C 7 (4X) A1 L A A2 eB B S Symbol A A1 A2 B B1 B2 C D E E1 e L eB S e B1 B2 Dimensions in millimeters Min. Nom. Max. 5.33 0.38 3.1 3.30 3.5 0.36 0.46 0.56 1.4 1.52 1.65 0.81 0.99 1.14 0.20 0.25 0.36 9.02 9.27 9.53 7.62 7.94 8.26 6.15 6.35 6.55 2.54 2.92 3.3 3.81 8.38 8.89 9.40 0.71 0.84 0.97 Anachip Corp. www.anachip.com.tw Dimensions in inches Min. Nom. Max. 0.210 0.015 0.122 0.130 0.138 0.014 0.018 0.022 0.055 0.060 0.065 0.032 0.039 0.045 0.008 0.010 0.014 0.355 0.365 0.375 0.300 0.313 0.325 0.242 0.250 0.258 0.100 0.115 0.130 0.150 0.330 0.350 0.370 0.028 0.033 0.038 Rev.A5 Feb.10, 2004 8/10 AP34063 Universal DC/DC Converter H E (2) SOP-8L L VIEW "A" D 0.015x45 C B A1 e 7 (4X) A A2 7 (4X) VIEW "A" y Symbol A A1 A2 B C D E e H L y θ Dimensions In Millimeters Min. Nom. Max. 1.40 1.60 1.75 0.10 0.25 1.30 1.45 1.50 0.33 0.41 0.51 0.19 0.20 0.25 4.80 5.05 5.30 3.70 3.90 4.10 1.27 5.79 5.99 6.20 0.38 0.71 1.27 0.10 8O 0O Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.055 0.063 0.069 0.040 0.100 0.051 0.057 0.059 0.013 0.016 0.020 0.0075 0.008 0.010 0.189 0.199 0.209 0.146 0.154 0.161 0.050 0.228 0.236 0.244 0.015 0.028 0.050 0.004 0O 8O Rev.A5 Feb.10, 2004 9/10 AP34063 Universal DC/DC Converter Design Formula Table Calculation ton /toff Step-Up Step-Down Voltage-Inverting Vout +VF -Vin(min) vout +vF Ivout l+vF Vin(min) - Vsat vin(min) -vsat - vout 1/f 1/f 1/f ton +toff ton +toff ton +toff (ton + toff) toff ton toff ton +1 toff Vin -vsat ton +1 toff +1 ton (ton +toff)-toff (ton +toff)-toff (ton +toff)-toff CT 4.0×10-5ton 4.0×10-5ton 4.0×10-5ton Ipk(switch) 2Iout(max) (ton /toff +1) 2Iout(max) 2Iout(max) (ton /toff +1) Rsc 0.3/Ipk(switch) 0.3/Ipk(switch) 0.3/Ipk(switch) L(min) CO (Vin(min) – Vsat ) Ipk(switch) 9 ton(max) (Vin(min) – Vsat -Vout) Ipk(switch) Iout ton Ipk(switch) (toff +ton ) Vripple(pp) 8Vripple(pp) (Vin(min) – Vsat ) ton(max) Ipk(switch) 9 ton(max) Iout ton 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. www.anachip.com.tw Rev.A5 Feb.10, 2004 10/10