Anachip AP34063CN8 Universal dc/dc converter Datasheet

AP34063
Universal DC/DC Converter
General Description
Features
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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)
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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)
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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
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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
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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
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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.
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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
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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
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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.
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Rev.A5 Feb.10, 2004
10/10
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