ADDtek AMC34063AMF Dc-dc converter control circuit Datasheet

AMC34063A
DC–DC CONVERTER
CONTROL CIRCUITS
www.addmtek.com
DESCRIPTION
FEATURES
The AMC34063A is designed for the applications
which require DC - DC converters. It can be operated in a
wide input range from 3.0V to 40V and has the controlled
duty cycle oscillator, driver and high current output switch.
Also, With the internal temperature compensation circuit, the
AMC34063A provides an internally trimmed precision 2%
reference voltage of 1.25V. These features make the
AMC34063A suitable for step-up, step-down and
voltage–inverting applications.
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APPLICATIONS
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Wide Input Operating Range: 3.0V to 40V
Output Switch Current up to 1.5A
100KHz operational Frequency
Low Standby Current
Internally trimmed 2% 1.25V Reference Voltage
Adjustable Output Voltage
Available in 8 Pin Plastic DIP and 8 Pin S.O
Packages
Direct pin-to-pin replacement for industrial
product MC34063A.
PACKAGE PIN OUT
Chargers
Adaptors
Mother Board
Scanner
SC
1
8
DrC
SE
2
7
ISEN
Cap
3
6
VCC
GND
4
5
VFB-
M
PACKAGE
(TOP VIEW)
SC
1
8
DrC
SE
2
7
ISEN
Cap
3
6
VCC
GND
4
5
VFB
DM
PACKAGE
(TOP VIEW)
TA (°C)
0 to 70
Note:
ORDER INFORMATION
Plastic DIP
Plastic SO-8
M
DM
8-pin
8-pin
AMC34063AM (SnPb)
AMC34063ADM (SnPb)
AMC34063AMF (Lead Free)
All surface-mount packages are available in Tape & Reel.
The letter “F” is marked for Lead Free process.
Copyright © 2006 ADDtek Corp.
AMC34063ADMF (Lead Free)
Append the letter “T” to part number (i.e. AMC34063ADMT).
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AMC34063A
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage (VCC) ………………………………………………………………………………..…40V
Operating Junction temperature (M, DM Packages) ………………………………................................ 150 °C
Storage Temperature Range …………………………………………………………………...…. -65°C to 150°C
Lead temperature (Soldering, 10 seconds) …………………………………………………………..………300°C
Note 1:
Exceeding these ratings could cause damage to the device.
negative out of the specified terminal.
All voltages are with respect to Ground. Currents are positive into,
THERMAL DATA
M PACKAGE:
Power dissipation (PD), TA = 25 °C
Thermal Resistance-Junction to Ambient, θJA
DM PACKAGE:
Power dissipation (PD), TA = 25 °C
Thermal Resistance-Junction to Ambient, θJA
1.31W
95°C /W
757mW
165°C /W
BLOCK DIAGRAM
SC 1
8 DrC
Q2
S
Q
Q1
R
100
7 ISEN
SE 2
CT
Isen
Oscillator
Cap 3
6 VCC
1.25V
Reference
Gnd 4
Pin 1
Pin 2
Pin 3
Pin 4
: SC
: SE
: Cap
: GND
5 VFB
PIN ASSIGNMENT DESCRIPTIONS
- Switch Collector
Pin 8 : DrC - Driver Collector
- Switch Emitter
Pin 7 : ISEN - I Peak Sense
- Oscillator Timing Capacitor
Pin 6 : VCC - Power Supply
- Ground
Pin 5 : VFB - Comparator inverting input
Copyright © 2006 ADDtek Corp.
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AMC34063A
RECOMMENDED OPERATING CONDITIONS
Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
VFB
Comparator Input Voltage
-0.3 to + 40
VC(switch)
Switch Collector Voltage
40
VE(switch)
Switch Emitter Voltage (VPin1=40V)
40
V
Switch Collector to Emitter Voltage
40
CE(switch)
VC(driver)
Driver Collector Voltage
40
IC(driver)
Driver Collector Current (Note 1)
100
ISW
Switch Current
1.5
Timing Capacitor (connected to Cap pin)
CT
1
Operating Ambient Temperature Range
TA
0 to +70
Units
V
V
V
V
V
mA
A
nF
°C
Note 1: Maximum package power dissipation limits must be observed.
ELECTRICAL CHARACTERISTICS
VCC=5.0 V, TA=0°C to 70°C, unless otherwise specified.
Parameter
OSCILLATOR
Frequency
Charge Current
Discharge Current
Discharge to Charge Current Ratio
Current Limit Sense Voltage
OUTPUT SWITCH
Saturation Voltage, Darlington
Connection
Saturation Voltage
Symbol
Test Conditions
fosc
Ichg
VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C
VCC = 5.0 V to 40 V, TA = 25°C
VCC = 5.0 V to 40 V, TA = 25°C
Pin 7 to VCC, TA = 25°C
Ichg = Idischg, TA = 25°C
Idischg
Idischg/Ichg
Vsense
VCE(sat)
VCE(sat)
DC Current Gain
Collector Off─State Current
COMPARATOR
IC(off)
Threshold Voltage
Vth
Threshold Voltage Line Regulation
Input Bias Current
TOTAL DEVICE
Supply current
Copyright © 2006 ADDtek Corp.
hFE
Regline
IIB
ICC
ISW = 1.0 A, Pins 1, 8 connected
ISW = 1.0 A, Rpin 8 =82 Ω to VCC,
Forced β = 20
ISW = 1.0 A, VCE = 5.0 V, TA = 25°C
VCE = 40 V
TA = 25°C
TA =0°C to 70°C
VCC = 3.0 V to 40 V
VFB = 0 V
VCC = 5.0 V to 40 V,
CT = 1.0nF, Pin 7 = VCC,
VFB > Vth, Pin 2= GND, remaining
pins open
3
AMC34063A
Min. Typ. Max.
Units
24
24
140
5.2
250
33
35
220
6.5
300
42
42
260
7.5
350
KHz
µA
µA
mV
-
1.0
1.3
V
-
0.45
0.7
V
50
-
75
0.01
100
µA
1.225
1.21
-
1.25
1.4
-20
1.275
1.29
5.0
-400
mV
nA
-
-
4.0
mA
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AMC34063A
CHARACTERIZATION CURVES
VCC = 25V, 500mA load
CT = 470pF
VCC = 5V, Pin 1, 5, 8 open
CT = 1nF
23.3V
- 0.8V
SE pin (PIN#2) waveform
Cap pin (PIN#3) waveform
on 5V step down converter
VCC = 5V, Pin 1, 5, 8 open
CT = 1nF
VCC = 5V, Pin 1, 5, 8 open
CT = 1nF
Cap pin (PIN#3) waveform
Cap pin (PIN#3) waveform
Copyright © 2006 ADDtek Corp.
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AMC34063A
Figure 1 – Step-Up Converter Application Circuits
170uH
L
180
1
8
Q2
Q
S
Q1
R
7
2
CT
Rsc
0.22
Isen
Oscillator
V IN
12V
6
3
1.25V
Reference
100uF
1500pF
4
5
VOUT
28V/175mA
Co
47K
R2
R1
2.2K
330uF
Figure 2 – Step-Down Converter Application Circuit
1
8
Q2
Q
S
Q1
R
7
2
L
220uH
1N5819
CT
Rsc
0.33
Isen
Oscillator
V IN
25V
6
3
1.25V
Reference
100uF
470pF
4
5
VOUT
5V/500mA
Co
Copyright © 2006 ADDtek Corp.
3.6K
R2
R1
1.2K
470uF
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AMC34063A
Figure 3 – Voltage Inverting Converters
1
8
Q2
S
Q
Q1
R
7
2
L
88uH
1N5819
CT
Rsc
0.24
Ipk
Oscillator
V IN
4.5V to 6.0V
6
3
1.25V
Reference
1500pF
100uF
4
5
V OUT
-12V/100mA
953
3.6K
Co
R2
1000uF
R1
1.2K
8.2K
Note: For step-up, step-down or voltage inverting applications requiring peak current greater than 1.5A, external boost current circuitry by NPN or
PNP transistors can be used.
Copyright © 2006 ADDtek Corp.
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AMC34063A
Typical Design Reference Table:
Calculation
Step-Down
Step-Up
Voltage-Inverting
ton/toff
Vout + VF
Vin(min) − Vsat− Vout
Vout + VF − Vin(min)
Vin(min) − Vsat
?Vout? + VF
Vin − Vsat
ton + toff
1
f
1
f
1
f
toff
ton + toff
ton/toff + 1
ton + toff
ton/toff + 1
ton + toff
ton/toff + 1
ton
(ton + toff) − toff
(ton + toff) − toff
(ton + toff) − toff
CT
4.0 × 10 ton
4.0 × 10 ton
4.0 × 10-5 ton
Ipk(switch)
2Iout(max)
2Iout(max) (ton/toff + 1)
2Iout(max) (ton/toff + 1)
RSC
0.3/Ipk(switch)
0.3/Ipk(switch)
0.3/Ipk(switch)
L(min)
-5
( (V
CO
in(min) −
Vsat− Vout)
Ipk(switch)
-5
)t
on(max)
( (V I
in(min) −
Vsat)
pk(switch)
Ipk(switch)( ton + toff)
8Vripple(pp)
9
)t
on(max)
( (V I
in(min) −
Vsat)
pk(switch)
Iout ton
Vripple(pp)
9
)t
on(max)
Iout ton
Vripple(pp)
VF: Forward Voltage drop of the output rectifier
Vsat: Saturation voltage of the output switch.
The following power supply characteristics must be chosen:
Vin - Nominal input voltage
Vout - Desired output voltage, ?Vout? = 1.25(1 + R1/R2)
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.
Application concerns:
To get the best regulation performance, Low ESR capacitors at Vout are suggested.
Copyright © 2006 ADDtek Corp.
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AMC34063A
PACKAGE
8-Pin Plastic DIP
5
8
INCHES
B
1
MIN
4
A
L
F
C
J
K
H
G
M
D
TYP
MILLIMETERS
MAX
MIN
TYP
MAX
A
0.355 0.365 0.400
9.02
9.27
10.16
B
0.240 0.250 0.280
6.10
6.35
7.11
C
-
-
0.210
-
-
5.33
D
-
0.018
-
-
0.46
-
F
-
0.060
-
-
1.52
-
G
-
0.100
-
-
2.54
-
H 0.050
-
0.090
1.27
-
2.29
J
0.008
-
0.015
0.20
-
0.38
K
0.115 0.130 0.150
2.92
3.30
3.81
L
M
0.300 BSC.
-
7º
7.62 BSC.
15º
-
7º
15º
Note: For 8-pin Plastic package, 60 units per tube
8-Pin Plastic S.O.I.C.
INCHES
A
B
P
F
D
G
K
Copyright © 2006 ADDtek Corp.
MAX
MIN
TYP
MAX
A
0.183
-
0.202
4.65
-
5.13
B
0.144
-
0.163
3.66
-
4.14
C 0.068
-
0.074
1.35
-
1.88
D 0.010
-
0.020
0.25
-
0.51
F
-
0.035
0.38
-
0.89
J
C
SEATING PLANE
SEATING
PLAN
TYP
0.015
G
L
M
J
8
MILLIMETERS
MIN
0.050 BSC
0.007
-
1.27 BSC
0.010
0.19
-
0.25
K
0.005
-
0.010
0.13
-
0.25
L
0.189
-
0.205
4.80
-
5.21
M
-
-
8º
-
-
8º
P
0.228
-
0.244
5.79
-
6.20
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AMC34063A
IMPORTANT NOTICE
ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service
without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing
orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe
property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or
warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of
ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer’s applications, the customer should provide adequate design and operating safeguards.
ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of
its products to the specifications applicable at the time of sale.
ADDtek Corp.
9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105
TEL: 2-25700299
FAX: 2-25700196
Copyright © 2006 ADDtek Corp.
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