AP34063 ANACHIP | Alldatasheet
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Technical content
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 Features
- 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 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, contro lled 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. Pin Connections VCC Comparator Inverting Input Driver Collector I pk Sense Switch Collector Switch Emitter Timing Capacitor Gnd (Top View) Ordering Information AP34063 X X X X Package PackingTemp. grade S8 : SOP-8L N8 : PDIP-8L Blank : Tube A : Taping Blank: 0oC~70oC Lead Free Blank : Normal L : Lead Free Package
Anachip Corp. Maximum Ratings Parameter Symbol Value Unit Power Supply Voltage V CC 40 V Comparator Input Voltage Range V IR -0.3 ~ +40 V Switch Collector Voltage V C(switch) 40 V Switch Emitter Voltage(VPin 1 = 40V) V E(switch) 40 V Switch Collector to Emitter Voltage V CE(switch) 40 V Driver Collector Voltage V C(driver) 40 V Driver Collector Current (Note 1) I C(driver) 100 mA Switch Current I SW 1.6 A PDIP: TA = 25°C PD 1.25 W Thermal Resistance θJA 100 °C/W SOP: TA = 25°C PD 600 mW Power Dissipation and Thermal Characteristics Thermal Resistance RθJA 160 °C/W Operating Junction Temperature T J +150 °C Operating Ambient Temperature Range TA 0 ~ +70 °C Storage Temperature Range T stg -65 ~ +150 °C Notes: 1.Maximum package power dissipation limits must be observed. 2.ESD data available upon request. Electrical Characteristics (VCC = 5.0V, unless otherwise specified.) Characteristics Symbol Min Typ Max Unit OSCILLATOR Frequency(VPin 5 =0V, CT =1.0nF, TA =25°C) fosc 24 33 42 kHz Charge Current(VCC =5.0V to 40V, TA =25°C) Ichg 24 30 42 µA Discharge Current(VCC =5.0V to 40V, TA =25°C) Idischg 140 200 260 µA Discharge to Charge Current Ratio(Pin 7 to VCC, TA =25°C) Idischg / Ichg 5.2 6.5 7.5 - Current Limit Sense Voltage(Ichg = Idischg, TA =25°C) Vipk(sense) 300 400 450 mV OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection ( I SW =1.0A, Pins 1,8 connected) VCE(sat) - 1.0 1.3 V Saturation Voltage, Darlington Connection ( I SW =1.0A, ID = 50mA, Forced ß ≈ 20) VCE(sat) - 0.45 0.7 V DC Current Gain(ISW =1.0A, VCE =5.0V, TA =25°C) hFE 50 75 - - Collector Off-State Current (VCE =40V) I C(off) - 0.01 100 µA COMPARATOR Threshold Voltage TA = 25°C T = 0oC ~ 75oC Vth 1.225 1.21 1.25 1.275 1.29 V Threshold Voltage Line Regulation(VCC =3.0V to 40V) Reg line - 1.4 6.0 mV TOTAL DEVICE Supply Current(VCC =5.0V to 40V, CT =1.0nF, Pin 7 = VCC, V Pin 5 > Vth Pin 2 = Gnd, remaining pins open) ICC - - 3.5 mA
Anachip Corp. 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: I C output Forced ß of output switch : IC driver - 7.0mA* ≥ 10 *The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts. Representative Schematic Diagram 1.25V Reference Regulator Ipk Oscillator CT R SQ 100 Comparator (Bottom View) Gnd Timing Capacitor Switch Emitter Switch Collector Drive Collector Ipk Sense VCC Comparator Inverting Input
Anachip Corp. Application Circuit (1) Step-Up Converter 1.25V Ref Reg Ipk CT R SQ Comp.+ VCC Osc 180 470 uF Vin 12V Rsc 0.24 R1 10k 56k CO 28V/200mA Vout 100 Vout Optional Filter L 120uH CT 680 pF 1N5819 470uF 1.0uH Test Conditions Results Line Regulation V in =9V to 12V, IO =200mA 20mV = ± 0.035% Load Regulation V in =12V, IO =50mA to 200mA 15mV = ± 0.035% Output Ripple V in =12V, IO =200mA 500mV PP Efficiency V in =12V, IO =200mA 80%
Anachip Corp. (2) Step-Down Converter 1.25V Ref Reg Ipk CT R SQ Comp.+ VC C Osc 470 uF Vin 25V Rsc 0.11 R1 25k 36k CO 5.0V/500mA Vout 100 Vout Optional Filter CT 470 pF L 100uH 1N5819 470uF 1.0uH Test Conditions Results Line Regulation V in =12V to 24V, IO =500mA 20mV = ± 0.2% Load Regulation V in =24V, IO =50mA to 500mA 5mV = ± 0.05% Output Ripple V in =24V, IO =500mA 160mV PP Efficiency V in =24V, IO =500mA 82%
Anachip Corp. (3) Voltage Inverting Converter 1.25V Ref Reg Ipk CT R SQ Comp.+ VC C Osc 470uF Vin 4.5V to 6.0V Rsc 0.26 R2 50k 3k CO -12V/100mA Vout 100 Vout Optional Filter 680 pF L 1N5819 470uF 1.0uH 100 uH + + Test Conditions Results Line Regulation V in =4.5V to 6.0V, IO =100mA 20mV = ± 0.08% Load Regulation V in =5.0V, IO =20mA to 100mA 30mV = ± 0.12% Output Ripple V in =5.0V, IO =100mA 500mV PP Efficiency V in =5.0V, IO =100mA 60% Marking Information AC AP34063 YY WW X X Logo Part Number X : Internal code ( Optional) WW: Xth week: 01~52 YY : Year: "01"=2001 "02"=2002 ( Top View) Blank: normal L: Lead Free Package (SOP-8L / PDIP-8L)
Anachip Corp. Package Dimension (1) PDIP-8L D 7 (4X) AL A2A1 B2B1 B eS 15 (4X) E C eB E-PIN O0.118 inch PIN #1 INDENT O0.025 DEEP 0.006-0.008 inch
Anachip Corp. (2) SOP-8L VIEW "A" L C VIEW "A" H E A A2A1Be D 7 (4X) 0.015x45 7 (4X) y A1 0.10 - 0.25 0.040 - 0.100 θ 0O - 8 O 0 O - 8 O
Anachip Corp. Design Formula Table Calculation Step-Up Step-Down Voltage-Inverting Vout +VF -Vin(min) v out +vF Iv out l+vF ton /toff V in(min) - Vsat v in(min) -vsat - vout V in -vsat (ton + toff) 1/f 1/f 1/f ton +toff t on +toff t on +toff ton t on t on toff toff toff toff ton (t on +toff)-toff (t on +toff)-toff (t on +toff)-toff CT 4.0×10-5 t on 4.0 ×10-5 t on 4.0 ×10-5 t on Ipk(switch) 2I out(max) (ton /toff +1) 2I out(max) 2I out(max) (ton /toff +1) Rsc 0.3/I pk(switch) 0.3/I pk(switch) 0.3/I pk(switch) (Vin(min) – Vsat ) (V in(min) – Vsat -Vout) (V in(min) – Vsat ) L(min) Ipk(switch) ton(max) I pk(switch) ton(max) I pk(switch) ton(max) Iout ton I pk(switch) (toff +ton ) I out ton CO 9 Vripple(pp) 8V ripple(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.