MC34063APG [Wing Shing]
DC-TO-DC Converter Control Circuits; DC- TO- DC转换器控制电路
| 型号： | MC34063APG |
| 厂家： | 
WING SHING COMPUTER COMPONENTS |
| 描述： | DC-TO-DC Converter Control Circuits |
| 文件： | 总15页 (文件大小：452K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DESCRIPTION
PIN CONFIGURATION
The MC34063A is a monolithic control circuit containing
the primary functions required for DC-to-DC converters.
The device consists of an internal temperature compen-
sated reference, comparator, controlled duty cycle oscill-
ator with an active current limit circuit, driver and high
current output switch. MC34063A is specifically designed
to be incorporated in Step-Down, Step-Up and Voltage-
Inverting applications with a minimum number of extern-
al components.
Switch
Diver
1
2
3
4
8
7
6
5
Collector
Collector
Switch
Emitter
IPK Sense
Timing
VCC
Capacitor
Comparator
Inverting
Input
GND
(Top View)
FEATURES
Operation from -0.3V to 40V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5A
Output Voltage Adjustable
Frequency Operation to 42kHz
Precision 2% Reference
APPLICATION
DC-DC Converter
ORDERING INFORMATION
Orderable
Device
Temperature Range
Package
Package Qty
SOP8L
SOP8L
DIP8L
MC34063ADG
MC34063ADRG
MC34063APG
75Units/Tube
2500Units/Tape
50Units/Tube
to
Pb-Free
0°C
+70°C
1
SCHEMATIC DIAGRAM
1
8
Switch
Drive
Collector
Collector
Q2
Q
S
R
Q1
7
Ipk
100
2
Sense
Switch
Emitter
Ipk
GT
Oscillator
6
3
Timing
VCC
Capacitor
+
1,25V
Comparator
Reference
Regulator
_
5
4
GND
Comparator
Inverting
Input
(Bottom View)
Figure 1. Representative Schematic Diagram
ABSOLUTE MAXIMUM RATINGS
Parameter
Unit
Symbol
VCC
Value
Power Supply Voltage
40
V
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (VPin1 = 40 V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
VIR
−0.3 to +40
V
VC(switch)
VE(switch)
40
40
V
V
VCE(switch)
40
V
VC(driver)
IC(driver)
40
100
V
mA
Driver Collector Current (Note 1)
Switch Current
ISW
1.5
625
1.25
160
100
A
mW
W
D Package
Power Dissipation, TA = 25°C
PD
P Package
D Package
Thermal Resistance, TA = 25°C
P Package
RθJA
°C/W
TJ
TA
Operating Junction Temperature
Operating Ambient Temperature Range
+150
0 to +70
−65 to +150
°C
°C
°C
Storage Temperature Range
Tstg
2
ELECTRICAL CHARACTERISTICS
(Vcc = 5.0V, TA=0 to +70°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
OSCILLATOR
Frequency
Charge Current
fosc
Ichg
VPin5=0V,CT=1.0nF,TA= 25°C 24
VCC = 5.0V to 40V, TA = 25°C 24
33 42 kHz
33 42
μA
Discharge Current
Idischg
VCC = 5.0V to 40V, TA = 25°C 140 200 260 μA
Discharge to Charge
Current Ratio
Current Limit
Sense Voltage
Idischg/Ichg
Vlpk(sense)
Pin7 to VCC, TA=25°C
Ichg = Idischg, TA = 25°C
5.2 6.2 7.5
250 300 350 mV
OUTPUT SWITCH (Note 3)
ISW = 1.0A,
Pins 1, 8 connected
Saturation Voltage,
VCE(sat)
VCE(sat)
hFE
1.3
0.45 0.7
50 75
40
V
V
1.0
Darlington Connection
ISW = 1.0A, Forced β = 20
RPin 8 = 82Ω to VCC
ISW = 1.0A, VCE =5.0V,
TA = 25°C
Saturation Voltage,
Darlinton Connection
DC Current Gain
Collector Off-State
Current
IC(off)
VCE = 40V
100 μA
COMPARATOR
TA = 25°C
TA = Tlow to Thigh
1.225 1.25 1.275
1.21 1.29
V
Threshold Voltage
Vth
Threshold Voltage
Line Regulation
Regline
IIB
VCC = 3.0V to 40V
Vin = 0V
1.4 5.0 mV
-20 -400 nA
Input Bias Current
TOTAL DEVICE
VCC = 5.0V to 40V,
CT = 10nF, Vpin7 = VCC,
VPin5 > Vth, Pin 2 = GND,
Remaining pins open
Supply Current
ICC
2.5 4.0 mA
NOTE 1: Maximum package power dissipation limits must be observed
NOTE 2: Low duty cycle pulse techniques are used during test to maintain juction temperature as
close to ambient temperature as possible
3
Assembly Information:
CHIP APPEARANCE
CHIP SIZE
1,18 × 1,27 mm
460 ± 20 μm
90 × 90 μm
CHIP THICKNESS
1a
1b
2a
2b
SWITCH
COLLECTOR
8
1
7
6
SWITCH
EMITTER
TIMING
CAPACITOR
90 × 90 μm
90 × 90 μm
3
4
BONDING PAD
DIMENSION
GROUND
90 × 90 μm
90 × 90 μm
COMPARATOR
INVERTING
INPUT
5
3
2
4
5
Vcc
6
7
90 × 90 μm
90 × 90 μm
90 × 90 μm
Ipk SENCE
DRIVER
COLLECTOR
8
SCRIBE LINE WIDTH
TOP METAL
96 μm
Al
BACK METAL
–
WAFER SIZE
100 mm
4
TYPICAL PERFORMANCE CHARACTERISTICS
1000
500
CC
V
=5.0V
Pin7=VCC
200
100
50
Pin5=GND
A
T =25°C
t
on
20
10
5.0
2.0
1.0
VCC=5.0V
Pin7=VCC
Pin2=GND
toff
Pins1,5,8=Open
CT=1.0μF
TA=25°C
0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10
10μS / DIV
CT,OSCILLATOR TIMING CAPACITOR(nF)
Figure 2. Output Switch On−Off Time vs.
Oscillator Timing Capacitor
Figure 3. Timing Capacitor Waveform
1.1
1.0
0.9
1.8
1.7
1.6
1.5
Darlington Connection
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
VCC=5.0V
Pin7=Vcc
1.4
VCC=5.0V
Pins 2,3,5=GND
TA = 25ºC
Pins1,7,8=Vcc
1.3
Pins3,5=GND
Forcedβ = 20
TA = 25ºC
1.2
1.1
1.0
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IC, COLLECTOR CURRENT(A)
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IE, EMITTER CURRENT(A)
Figure 4. Emitter Follower Configuration Output
Saturation Voltage vs. Emitter Current
Figure 5. Common Emitter Configuration Output Switch
Saturation Voltage vs. Collector Current
ꢀꢀꢀ
3.6
3.2
2.8
2.4
2.0
1.6
400
380
Vcc=5.0V
Ichg=Idischg
360
340
320
300
280
260
240
220
200
1.2
CT=1.0nF
Pin7=Vcc
0.8
Pin2=GND
0.4
0
0
5.0 10 15 20 25 30 35 40
VCC,S UPPLY VOLTAGE(V)
-55 -25
0
25 50
75 100 125
TA,AMBIENT TEMPERATURE(°C)
Figure 7. Standby Supply Current vs.
ꢀꢀ
Supply Voltage
Figure 6. Current Limit Sense Voltage vs.
Temperature
5
TYPICAL APPLICATION
L1
170μH
R3
1
8
7
6
5
DRC
Ipk
SWC
180Ω
2
SWE
TC
D1
BYV10-40
RSG
3
4
VCC
CII
0.22Ω
VIN
VOUT
GND
12V
+
C2
C3
100μF
1.5nF
R1
R2
2.2kΩ
47kΩ
+
C3
330μF
Figure 8. Step−Up Converter
For VOUT=28V
Unit
Test Conditions
Result(Typ)
Parameter
Line Regulation
30
mV
mV
mV
VIN = 8 to 16 V, IO = 175 mA
VIN = 12 V, IO = 75 to 175 mA
VIN = 12 V, IO = 175 mA
Load Regulation
Output Ripple
Efficiency
10
300
89
%
VIN = 12 V, IO = 175 mA
6
TYPICAL APPLICATION(CONTINUED)
1
2
3
4
8
DRC
Ipk
SWC
SWE
TC
BYV10-40
D1
7
6
5
RSC
0.33Ω
VCC
CII
GND
L1
220μH
Vin
+
C2
C3
100μF
470pF
R2
R1
1.2kΩ
3.6kΩ
+
C1
470μF
Figure 9. Step−Down Converter
For VOUT = 5V
Unit
Test Conditions
Result(Typ)
Parameter
Line Regulation
5
mV
mV
mV
VIN = 15 to 25 V, IO = 500 mA
VIN = 25 V, IO = 50 to 500mA
VIN = 25 V, IO = 500 mA
VIN = 25 V, IO = 500mA
Load Regulation
Output Ripple
Efficiency
30
100
80
1.2
%
A
ISC
VIN = 25 V, Rload = 0.1 Ω
7
TYPICAL APPLICATION(CONTINUED)
1
2
3
4
8
DRC
Ipk
SWC
SWE
TC
L1
7
6
5
RSC
90μH
0.22Ω
VCC
CII
VIN
GND
4.5 to 6V
D1
BYV10-40
+
C2
C3
100μF
1.5nF
R2
R1
VOUT
-12V / 100mA
8.2kΩ
953kΩ
C1
1000μF
+
Figure 10. Voltage Inverting Converter
For VOUT = -12V
Unit
Result(Typ)
Patameter
Test Conditions
Line Regulation
15
mV
mV
mV
VIN = 4.5 to 6 V, IO = 100 mA
VIN = 5 V, IO = 10 to 100mA
VIN = 5 V, IO = 100 mA
VIN = 5 V, IO = 100mA
Load Regulation
Output Ripple
Efficiency
20
230
58
0.9
%
A
ISC
VIN = 5 V, Rload = 0.1 Ω
8
TYPICAL APPLICATION(CONTINUED)
8
1
VOUT
Q2
Q
S
R
+
Q1
2
3
7
6
5
Ipk
Oscillator
RSC
VIN
1.25V
+
Reference
Regulator
Comparator
4
_
Figure 11. Step-up with External NPN Switch
8
1
Q2
Q
S
R
Q1
2
3
7
6
5
Ipk
Oscillator
RSC
VOUT
VIN
1.25V
+
Reference
Regulator
+
Comparator
4
_
Figure 12. Step-down with External NPN Switch
9
TYPICAL APPLICATION(CONTINUED)
8
1
Q2
Q
S
R
Q1
VOUT
2
3
+
7
6
5
Ipk
Oscillator
RSC
VIN
1.25V
+
Reference
Regulator
Comparator
4
_
Figure 13. Step-down with External PNP Switch
8
1
Q2
Q
S
R
Q1
2
3
7
Ipk
Oscillator
RSC
VOUT
VIN
6
5
1.25V
+
Reference
Regulator
Comparator
4
+
_
Figure 14. Voltage Inverting with External NPN Switch
10
TYPICAL APPLICATION(CONTINUED)
8
1
Q2
Q
S
R
VOUT
Q1
2
3
+
7
6
5
Ipk
Oscillator
RSC
VIN
1.25V
+
Reference
Regulator
Comparator
4
_
Figure 15. Voltage Inverting with External PNP Saturated Switch
+12V
GND
-12V
+
+
8
1
Q2
Q
S
R
Q1
2
3
7
Ipk
Oscillator
RSC
VIN
6
5
1.25V
+
Reference
Regulator
Comparator
4
_
Figure 16. Dual Output Voltage
11
TYPICAL APPLICATION(CONTINUED)
+VOUT
+
Isolated from input
-VOUT
+
8
1
Q2
Q
S
R
Q1
2
3
7
6
5
VIN
RSC
Ipk
Oscillator
1.25V
+
Reference
Regulator
Comparator
4
_
Figure 17. Higher Output Power, Higher Input Voltage
12
CALCULATION
Table 1 Design Formula Table
Step-Up Step-Down
Calculation
Voltage-Inverting
Vout + VF
Vin(min) - Vsat - Vout
Vout + VF - Vin(min)
Vin(min) - Vsat
|
|
Vout + VF
t
on/toff
-
Vin Vsat
1
f
1
f
1
f
(ton+toff)
max
ton + toff
ton/toff + 1
ton + toff
ton/toff + 1
ton + toff
ton/toff + 1
t
off
on
(ton + toff) - toff
(ton + toff) - toff
4.0×10-5 ton
(ton + toff) - toff
4.0×10-5 ton
t
4.0×10-5 ton
ton
C
T
ton
toff
2Iout(max)
(
)
I
pk(switch)
+ 1
2Iout(max)
(
)
+ 1
2Iout(max)
toff
0.3
PK(switch)
0.3
0.3
R
SC
I
I
PK(switch)
I
PK(switch)
(Vin(min) - Vsat)
Ipk(switch)
(Vin(min) - Vsat - Vout)
Ipk(switch)
(Vin(min) - Vsat)
Ipk(switch)
ton(max)
ton(max)
ton(max)
L
(min)
Ioutton
Vripple(p-p)
Ipk(switch)(ton + toff)
8Vripple(p-p)
Ioutton
Vripple(p-p)
≈
≈
C
O
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.
Iout=Desired output current.
V
out =1.25(1+R2/R1)
fmin=Minimum desired output switching frequency at the selected values of Vin and Io
Vripple(pp)=Desired peak-to-peak output ripple voltage.In prictice,the calculated capacitor value
will need to be increased due to its equivalent series resistance and board layout.
The ripple should be kept to a low value since it will directiy affect the line and load
regulation.
13
PHYSICAL DIMENSIONS
SOP8L
A1
A3
A2
1
4
R2
2
A
R1
B2
D1
D
Dimension(mm)
Symbol
Dimension(mm)
Symbol
Max
Min
Min
Max
A
C3
0.05
0.20
4.95
0.37
5.15
0.47
A1
A2
A3
B
B1
B2
C
0.20(TYP)
1.05(TYP)
C4
D
1.27(TYP)
0.41(TYP)
0.40
0.60
0.07(TYP)
0.07(TYP)
17 (TYP)
13 (TYP)
4 (TYP)
D1
R1
R2
1
2
3
5.80
3.80
6.20
4.00
5.0(TYP)
1.30
0.55
0.55
1.50
0.65
0.65
C1
C2
12 (TYP)
4
14
DIP8L
A
D2
1
2
3
D1
D
A5
A3
A4
A2
A1
Dimension(mm)
Max
0.5(TYP)
3.3(TYP)
1.57(TYP)
Dimension(mm)
Symbol
Symbol
Min
Max
Min
A
C2
9.30
9.50
A1
A2
A3
A4
C3
C4
1.524(TYP)
0.53
0.39
D
8.20
0.20
7.62
2.54(TYP)
0.66(TYP)
8.80
0.35
7.87
D1
D2
A5
0.99(TYP)
6.5
6.3
1
2
3
8 (TYP)
B
C
8 (TYP)
5 (TYP)
7.20(TYP)
3.50
3.30
C1
15
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