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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 JA 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=0~70C, 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 80 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 150 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 2.2k
47k
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 3.6k RA 1.2k
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=0.1 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 8.2k 953 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
1 K
M L
DIM A B C D E F G H I J K L M 1
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 <3 C/sec 100oC 150oC 60~120 sec <3oC/sec 183oC 60~150 sec 240 C +0/-5 C 10~30 sec <6oC/sec <6 minutes
o o o
Pb-Free Assembly <3oC/sec 150oC 200oC 60~180 sec <3oC/sec 217oC 60~150 sec 260oC +0/-5oC 20~40 sec <6oC/sec <8 minutes
Peak temperature 245 C 5 C
o o
Dipping time 5sec 1sec 5sec 1sec
260 C +0/-5 C
o
o
AVANTICS - AX34063AP, AX34063AS
Specification No.: 050308-FE0007

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