MC34063AP1 [ONSEMI]
DC-to-DC CONVERTER CONTROL CIRCUITS; DC- TO- DC转换器控制电路
| 型号： | MC34063AP1 |
| 厂家： | 
ONSEMI |
| 描述： | DC-to-DC CONVERTER CONTROL CIRCUITS |
| 文件： | 总12页 (文件大小：203K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Order this document by MC34063A/D
DC–to–DC CONVERTER
CONTROL CIRCUITS
The MC34063A 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 designed to be incorporated in
Step–Down and Step–Up and Voltage–Inverting applications with a
minimum number of external components. Refer to Application Notes
AN920A/D and AN954/D for additional design information.
SEMICONDUCTOR
TECHNICAL DATA
• Operation from 3.0 V to 40 V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5 A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
8
1
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
Representative Schematic Diagram
Switch
Collector
Driver
Collector
8
7
6
5
1
2
Switch
Emitter
I
Sense
pk
1
8
7
6
Drive
Collector
Switch
Collector
Timing
Capacitor
V
3
4
CC
Q2
S Q
R
Comparator
Inverting
Input
Q1
Gnd
100
I
pk
Sense
2
3
Switch
Emitter
(Top View)
I
pk
Oscillator
C
T
ORDERING INFORMATION
Operating
Timing
Capacitor
V
CC
Comparator
Temperature Range
Device
Package
1.25 V
Reference
Regulator
+
–
MC33063AD
MC33063AP1
MC33063AVD
MC33063AVP
MC34063AD
SO–8
T
A
= – 40° to +85°C
= –40° to +125°C
5
4
Comparator
Inverting
Input
Plastic DIP
SO–8
Gnd
T
A
(Bottom View)
Plastic DIP
SO–8
This device contains 51 active transistors.
T
A
= 0° to +70°C
MC34063AP1
Plastic DIP
Motorola, Inc. 1996
Rev 5
MC34063A MC33063A
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
A
Power Supply Voltage
V
CC
40
Comparator Input Voltage Range
Switch Collector Voltage
V
IR
–0.3 to +40
V
V
40
40
C(switch)
Switch Emitter Voltage (V
= 40 V)
Pin 1
E(switch)
Switch Collector to Emitter Voltage
Driver Collector Voltage
V
40
CE(switch)
V
40
C(driver)
C(driver)
Driver Collector Current (Note 1)
Switch Current
I
100
1.5
I
SW
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
T
= 25°C
P
1.25
100
W
°C/W
A
D
Thermal Resistance
R
θJA
SOIC Package, D Suffix
T
= 25°C
P
625
160
W
°C/W
A
D
Thermal Resistance
R
θJA
Operating Junction Temperature
T
+150
°C
°C
J
Operating Ambient Temperature Range
MC34063A
MC33063AV
T
A
0 to +70
–40 to +125
–40 to +85
MC33063A
Storage Temperature Range
T
stg
–65 to +150
°C
NOTES: 1. Maximum package power dissipation limits must be observed.
2. ESD data available upon request.
ELECTRICAL CHARACTERISTICS (V
CC
= 5.0 V, T = T
to T
[Note 3], unless otherwise specified.)
high
A
low
Characteristics
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency (V
= 0 V, C = 1.0 nF, T = 25°C)
f
24
24
33
35
42
42
kHz
µA
µA
–
Pin 5
T
A
osc
Charge Current (V
= 5.0 V to 40 V, T = 25°C)
I
CC
A
chg
Discharge Current (V
= 5.0 V to 40 V, T = 25°C)
I
140
5.2
250
220
6.5
300
260
7.5
350
CC
A
dischg
Discharge to Charge Current Ratio (Pin 7 to V , T = 25°C)
I
dischg chg
/I
CC
A
Current Limit Sense Voltage (I
= I
, T = 25°C)
V
mV
chg dischg
A
ipk(sense)
OUTPUT SWITCH (Note 4)
Saturation Voltage, Darlington Connection (Note 5)
(I = 1.0 A, Pins 1, 8 connected)
V
V
–
–
1.0
1.3
0.7
V
V
CE(sat)
SW
Saturation Voltage, Darlington Connection
(I = 1.0 A, R = 82 Ω to V , Forced β
0.45
CE(sat)
20)
SW CC
Pin 8
DC Current Gain (I
= 1.0 A, V
= 5.0 V, T = 25°C)
h
FE
50
–
75
–
–
SW
CE
A
Collector Off–State Current (V
= 40 V)
I
0.01
100
µA
CE
C(off)
NOTES: 3. T
= 0°C for MC34063A, –40°C for MC33063A, AV
T
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
high
low
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents (≥ 30 mA),
it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, 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
output
C
Forced of output switch :
10
I
driver – 7.0 mA *
C
*The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
2
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
ELECTRICAL CHARACTERISTICS (continued) (V
= 5.0 V, T = T
to T
[Note 3], unless otherwise specified.)
CC
A
low
high
Symbol
Characteristics
Min
Typ
Max
Unit
COMPARATOR
Threshold Voltage
V
th
V
T
T
A
= 25°C
1.225
1.21
1.25
–
1.275
1.29
A
= T
to T
low high
Threshold Voltage Line Regulation (V
MC33063A, MC34063A
MC33363AV
= 3.0 V to 40 V)
Reg
line
mV
CC
–
–
1.4
1.4
5.0
6.0
Input Bias Current (V = 0 V)
in
I
IB
–
–20
–400
nA
TOTAL DEVICE
Supply Current (V
= 5.0 V to 40 V, C = 1.0 nF, Pin 7 = V
CC
,
I
CC
–
–
4.0
mA
CC
T
V
Pin 5
> V , Pin 2 = Gnd, remaining pins open)
th
NOTES: 3. T
= 0°C for MC34063A, –40°C for MC33063A, AV
T
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
high
low
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents (≥ 30 mA),
it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, 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
output
C
Forced of output switch :
10
I
driver – 7.0 mA *
C
*The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Figure 1. Output Switch On–Off Time versus
Figure 2. Timing Capacitor Waveform
Oscillator Timing Capacitor
1000
V
= 5.0 V
500
200
100
50
CC
Pin 7 = V
Pin 5 = Gnd
CC
T
= 25°C
A
t
on
20
10
5.0
2.0
1.0
V
= 5.0 V
Pins 1, 5, 8 = Open
= 1.0 nF
t
CC
off
Pin 7 = V
C
CC
Pin 2 = Gnd
T
T
= 25
°C
A
0.01 0.02
0.05 0.1
0.2
0.5 1.0
2.0
5.0 10
10
µs/DIV
C , OSCILLATOR TIMING CAPACITOR (nF)
T
3
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Figure 4. Common Emitter Configuration Output
Figure 3. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current
Switch Saturation Voltage versus
Collector Current
1.1
1.0
0.9
0.8
0.7
0.6
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
Darlington Connection
V
= 5.0 V
CC
Pin 7 = V
0.5
0.4
0.3
0.2
CC
Pins 2, 3, 5 = Gnd
= 25
Forced
β = 20
T
°C
V
= 5.0 V
A
CC
(See Note 4)
Pins 1, 7, 8 = V
CC
Pins 3, 5 = Gnd
= 25
T
°C
A
0.1
0
(See Note 4)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
0.2
0.4
0.6
I , COLLECTOR CURRENT(A)
C
0.8
1.0
1.2
1.4
1.6
I
, EMITTER CURRENT (A)
E
Figure 5. Current Limit Sense Voltage
versus Temperature
Figure 6. Standby Supply Current versus
Supply Voltage
3.6
400
380
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
V
= 5.0 V
= I
CC
360
340
I
chg dischg
320
300
280
260
240
220
200
C
= 1.0 nF
T
Pin 7 = V
Pin 2 = Gnd
CC
0
5.0
10
15
20
25
30
35
40
–55
–25
0
25
50
75
C)
100
125
T , AMBIENT TEMPERATURE (
°
V
, SUPPLY VOLTAGE (V)
A
CC
NOTE: 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
4
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Figure 7. Step–Up Converter
170 µH
L
8
7
1
2
180
S
R
Q
Q2
Q1
1N5819
I
pk
C
R
T
sc
0.22
Osc
3
6
5
V
in
12 V
V
C
CC
T
+
100
1.25 V
Ref
Reg
+
–
Comp.
1500
pF
4
1.0 µH
R2
47 k
V
out
28 V/175 mA
V
out
+
+
R1 2.2 k
100
330
C
O
Optional Filter
Test
Conditions
= 8.0 V to 16 V, I = 175 mA
Results
Line Regulation
Load Regulation
Output Ripple
Efficiency
V
in
V
in
V
in
V
in
V
in
30 mV = ±0.05%
10 mV = ±0.017%
400 mVpp
O
= 12 V, I = 75 mA to 175 mA
O
= 12 V, I = 175 mA
O
= 12 V, I = 175 mA
87.7%
O
Output Ripple With Optional Filter
= 12 V, I = 175 mA
40 mVpp
O
Figure 8. External Current Boost Connections for I Peak Greater than 1.5 A
C
8a. External NPN Switch
8b. External NPN Saturated Switch
(See Note 5)
R
V
V
out
out
8
7
6
1
2
8
7
6
1
2
R
R
sc
sc
V
V
in
in
R
0 for
constant V
in
NOTE: 5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents
(≥ 30 mA), it may take up to 2.0 µs to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, 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.
5
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Figure 9. Step–Down Converter
8
7
6
1
S
R
Q
Q2
Q1
2
I
pk
R
0.33
sc
C
T
Osc
1N5819
3
C
V
in
25 V
V
CC
L
220 µH
+
T
100
1.25 V
Ref
Reg
+
–
Comp.
470
pF
5
4
1.0 µH
V
R2
3.6 k
out
5.0 V/500 mA
V
out
+
+
R1 1.2 k
100
470
C
O
Optional Filter
Test
Conditions
= 15 V to 25 V, I = 500 mA
Results
Line Regulation
V
in
V
in
V
in
V
in
V
in
V
in
12 mV = ±0.12%
3.0 mV = ±0.03%
120 mVpp
1.1 A
O
Load Regulation
Output Ripple
= 25 V, I = 50 mA to 500 mA
O
= 25 V, I = 500 mA
O
Short Circuit Current
Efficiency
= 25 V, R = 0.1 Ω
L
= 25 V, I = 500 mA
83.7%
O
Output Ripple With Optional Filter
= 25 V, I = 500 mA
40 mVpp
O
Figure 10. External Current Boost Connections for I Peak Greater than 1.5 A
C
10a. External NPN Switch
10b. External PNP Saturated Switch
1
8
7
6
1
V
8
7
out
2
2
V
out
R
R
sc
sc
V
in
V
in
6
6
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Figure 11. Voltage Inverting Converter
8
1
S
R
Q
Q2
Q1
7
6
2
3
I
88
µH
L
+
pk
R
sc
0.24
C
T
Osc
V
in
4.5 V to 6.0 V
V
CC
+
100
1.25 V
Ref
Reg
1500
pF
+
–
1N5819
Comp.
5
4
1.0 µH
R1
V
out
–12 V/100 mA
V
out
953
1000
µf
100
C
R2
8.2 k
O
+
+
Optional Filter
Test
Conditions
= 4.5 V to 6.0 V, I = 100 mA
Results
Line Regulation
Load Regulation
Output Ripple
V
in
V
in
V
in
V
in
V
in
V
in
3.0 mV = ±0.012%
0.022 V = ±0.09%
500 mVpp
O
= 5.0 V, I = 10 mA to 100 mA
O
= 5.0 V, I = 100 mA
O
Short Circuit Current
Efficiency
= 5.0 V, R = 0.1 Ω
910 mA
L
= 5.0 V, I = 100 mA
62.2%
O
Output Ripple With Optional Filter
= 5.0 V, I = 100 mA
70 mVpp
O
Figure 12. External Current Boost Connections for I Peak Greater than 1.5 A
C
12a. External NPN Switch
12b. External PNP Saturated Switch
8
7
6
1
2
1
2
V
8
7
out
V
out
V
in
V
in
6
7
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Figure 13. Printed Circuit Board and Component Layout
(Circuits of Figures 7, 9, 11)
5.45′′
2.500′′
(Top view, copper foil as seen through the board from the component side)
MC34063A
MC34063A
MC34063A
(Top View, Component Side)
*Optional Filter.
INDUCTOR DATA
Converter
Step–Up
Inductance (µH)
Turns/Wire
170
220
88
38 Turns of #22 AWG
48 Turns of #22 AWG
28 Turns of #22 AWG
Step–Down
Voltage–Inverting
All inductors are wound on Magnetics Inc. 55117 toroidal core.
8
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Figure 14. Design Formula Table
Step–Down
Calculation
/t
Step–Up
Voltage–Inverting
t
V
V
V
V
V
|V
V
|
V
on off
out
out
out
in
F
in(min)
F
F
V
V
V
V
V
V
sat
out
sat
in(min)
sat
in(min)
(t + t
on off
)
1
f
1
f
1
f
t
t
t
t
t
t
t
off
on
t
on
on
t
off
1
off
off
1
t
on
on
on
1
t
t
t
off
off
off
(t + t ) – t
off
t
on
(t + t ) – t
on off
(t + t ) – t
on off
off
off
on off
–5
4.0 x 10
–5
4.0 x 10
–5
4.0 x 10
C
t
t
t
on
T
on
on
I
pk(switch)
t
t
on
off
on
off
2I
2I
1
2I
1
out(max)
out(max)
out(max)
t
t
R
0.3/I
pk(switch)
0.3/I
0.3/I
pk(switch)
sc
pk(switch)
L
(min)
(V
V
)
(V
V
V
)
(V
V
)
sat
sat
out
sat
in(min)
I
in(min)
I
in(min)
I
t
t
t
on(max)
on(max)
on(max)
pk(switch)
pk(switch)
pk(switch)
I
C
O
I
out
9
t
I
(t
t
)
t
on
on
on
out
pk(switch)
8V
off
9
V
V
ripple(pp)
ripple(pp)
ripple(pp)
V
V
= Saturation voltage of the output switch.
= Forward voltage drop of the output rectifier.
sat
F
The following power supply characteristics must be chosen:
V
V
– Nominal input voltage.
– Desired output voltage,
– Desired output current.
in
out
out
R2
R1
|V
|
1.25 1
out
I
f
V
– Minimum desired output switching frequency at the selected values of V and I .
min
ripple(pp)
in
O
– 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.
V
ripple(pp)
NOTE: For further information refer to Application Note AN920A/D and AN954/D.
9
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
OUTLINE DIMENSIONS
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626–05
ISSUE K
8
5
4
NOTES:
–B–
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
1
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
F
MILLIMETERS
INCHES
–A–
NOTE 2
DIM
A
B
C
D
F
G
H
J
K
L
M
N
MIN
9.40
6.10
3.94
0.38
1.02
MAX
10.16
6.60
4.45
0.51
1.78
MIN
MAX
L
0.370
0.240
0.155
0.015
0.040
0.400
0.260
0.175
0.020
0.070
C
2.54 BSC
0.100 BSC
1.27
0.30
3.43
0.030
0.008
0.115
0.050
0.012
0.135
0.76
0.20
2.92
J
–T–
SEATING
PLANE
N
7.62 BSC
0.300 BSC
M
—
—
10°
10
°
D
K
0.030
0.76
1.01
0.040
G
H
M
M
M
0.13 (0.005)
T
A
B
D SUFFIX
PLASTIC PACKAGE
CASE 751–05
(SO–8)
ISSUE P
NOTES:
–A–
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
8
1
5
4X P
–B–
M
M
0.25 (0.010)
B
4
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
4.80
3.80
1.35
0.35
0.40
MAX
5.00
4.00
1.75
0.49
1.25
MIN
MAX
0.196
0.157
0.068
0.019
0.049
0.189
0.150
0.054
0.014
0.016
R X 45
F
C
F
SEATING
–T–
PLANE
G
J
K
M
P
R
1.27 BSC
0.050 BSC
K
J
M
0.18
0.10
0
0.25
0.25
7
0.007
0.004
0
0.009
0.009
7
8X D
0.25 (0.010)
M
S
S
T
B
A
5.80
0.25
6.20
0.50
0.229
0.010
0.244
0.019
10
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
NOTES
11
MOTOROLA ANALOG IC DEVICE DATA
MC34063A MC33063A
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
How to reach us:
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454
JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,
3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315
MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609
INTERNET: http://Design–NET.com
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
MC34063A/D
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相关型号：
MC34063AP1G
1.5A SWITCHING REGULATOR, 100kHz SWITCHING FREQ-MAX, PDIP8, LEAD FREE, PLASTIC, DIP-8
ROCHESTER
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