MC34063A_08 [UTC]
DC TO DC CONVERTER CONTROLLER; DC -DC转换器控制器型号: | MC34063A_08 |
厂家: | Unisonic Technologies |
描述: | DC TO DC CONVERTER CONTROLLER |
文件: | 总10页 (文件大小:474K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
MC34063A
LINEAR INTEGRATED CIRCUIT
DC TO DC CONVERTER
CONTROLLER
DESCRIPTION
The UTC MC34063A is a monolithic regulator subsystem,
intended for use as DC to DC converter. This device contains a
temperature compensated band gap reference, a duty-cycle
control oscillator, driver and high current output switch. It can be
used for step down, step-up or inverting switching regulators as
well as for series pass regulators.
FEATURES
* Operation from 3.0V to 40V.
* Short circuit current limiting.
* Low standby current.
Lead-free:
MC34063AL
* Output switch current of 1.5A without external transistors.
* Frequency of operation from 100Hz to 100kHz.
* Step-up, step-down or inverting switch regulators.
Halogen-free: MC34063AG
ORDERING INFORMATION
Ordering Number
Package
Packing
Normal
Lead Free
Halogen Free
MC34063A-D08-T
MC34063A-S08-R
MC34063AL-D08-T
MC34063AL-S08-R
MC34063AG-D08-T
MC34063AG-S08-R
DIP-8
Tube
SOP-8
Tape Reel
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Copyright © 2008 Unisonic Technologies Co., Ltd
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MC34063A
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO
PIN NAME
Switch Collector
Switch Emitter
Timing Capacitor
GND
I/O
I
DESCRIPTION
1
2
3
4
Internal Darlington pairs TI collector
O
Internal Darlington pairs TI emitter
The value of selected capacitor controls the internal oscillator run rate
Comparator Inverting
Input
Inverting input of comparator which can set & initiate the Darlington pairs
output switch
5
6
7
8
I
VCC
Current sense input to monitor the voltage drop across an external
resistor placed in series with VCC
IPEAK Sense
I
I
Driver Collector
Internal Darlington pairs TI collector
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MC34063A
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
E
T2
S
R
Switch Collector
1
2
3
4
Q
8
7
6
5
Drive Collector
IPEAK Sense
Vcc
T1
D
C
Switch Emitter
Timing Capacitor
GND
Is
A
CT
OSCILLATOR
COMP.
Comparator Inverting
Input
1.25VREF
B
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MC34063A
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=25°C )
PARAMETER
SYMBOL
VCC
RATINGS
40
UNIT
V
Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage
VIN(COMP)
VC(SW)
VE(SW)
VCE(SW)
VC(DR)
ISW
-0.3 ~ +40
40
V
V
40
V
Switch Collector to Emitter Voltage
Driver Collector Voltage
Switch Current
40
V
40
V
1.5
A
DIP-8
1250
625
Power Dissipation (Ta=25°C)
PD
mW
SOP-8
Junction Temperature
Operating Temperature
Storage Temperature
TJ
+150
0 ~ +70
-65 ~ +150
°C
°C
°C
TOPR
TSTG
Note: Absolute maximum ratings are those values beyond which the device which the device could be permanently
damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
100
UNIT
DIP-8
Junction-to-Ambient
θJA
℃/W
SOP-8
160
ELECTRICAL CHARACTERISTICS (VCC=5.0V, Ta=0~+70°C, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Oscillator
Charging Current
ICHG
IDISCHG
VOSC
K
VCC=5 to 40V, Ta=25°C
VCC=5 to 40V, Ta=25°C
Ta=25°C
V7=VCC, Ta=25°C
ICHG=IDISCHG, Ta=25°C
22
31
42
μA
Discharging Current
Oscillator Amplitude
Discharge to Charge Current Ratio
Current limit Sense Voltage
Output Switch
140 190 260 μA
0.5
6.1
V
5.2
7.5
VSENSE
250 300 350 mV
Saturation Voltage 1(Note)
Saturation Voltage 2(Note)
DC Current Gain(Note)
Collector Off State Current(Note)
Comparator
VCE(SAT)1 ISW=1.0A, VC(DRIVER)=VC(SW)
VCE(SAT)2 ISW=1.0A, VC(DRIVER)=50mA
0.95 1.3
0.45 0.7
180
V
V
GI (DC)
IC(OFF)
ISW=1.0A, VCE=5.0V, Ta=25°C
VCE=40.0V, Ta=25°C
50
0.01 100 μA
Threshold Voltage
VTHD
VTHD
II(BIAS)
1.21 1.24 1.29
V
Threshold Voltage Line Regulation
Input Bias Current
VCC=3 ~ 40V
VIN=0V
2.0
50
5.0 mV
400 nA
Total Device
V
CC=5~40V, CT=0.001
Supply Current
ICC
2.7
4.0 mA
V7=VCC, VC>VTHD, Pin2=GND
Note: Output switch tests are performed under pulsed conditions to minimize power dissipation.
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MC34063A
LINEAR INTEGRATED CIRCUIT
STEP-UP CONVERTER
170μH
L
8
7
1
2
180
S Q
R
Q2
Q1
1N5819
IPK
CT
RSC 0.22
VIN12V
OSC
3
CT
6
5
VCC
+
100
1.25V
REF REG
+
-
Comp.
1500pF
4
1.0μH
R2
47k
VOUT
28V/175mA
VOUT
+
+
R1 2.2k
100
330
CO
Optional Filter
Results
Test
Conditions
Line Regulation
Load Regulation
Output Ripple
Efficiency
VIN = 8.0V ~ 16V, IOUT = 175mA
VIN = 12V, IOUT = 75mA ~ 175mA
VIN = 12V, IOUT = 175mA
30mV = ±0.05%
10mV = ±0.017%
400mVp-p
87.7%
VIN = 12V, IOUT = 175mA
Output Ripple With Optional Filter
VIN = 12V, IOUT = 175mA
40mVp-p
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MC34063A
LINEAR INTEGRATED CIRCUIT
STEP-DOWN CONVERTER(Cont.)
Test
Conditions
Results
12mV = ±0.12%
3.0mV = ±0.03%
120mVp-p
Line Regulation
Load Regulation
Output Ripple
VIN = 15V ~ 25V, IOUT = 500mA
VIN = 25V, IOUT = 50mA ~ 500mA
VIN = 25V, IOUT = 500mA
VIN = 25V, RL = 0.1Ω
Short Circuit Current
Efficiency
1.1A
VIN = 25V, IOUT = 500mA
VIN = 25V, IOUT = 500mA
83.7%
Output Ripple With Optional Filter
40mVp-p
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MC34063A
LINEAR INTEGRATED CIRCUIT
VOLTAGE INVERTING CONVERTER
Test
Conditions
Results
3.0mV = ±0.012%
0.022V = ±0.09%
500mVp-p
Line Regulation
Load Regulation
Output Ripple
VIN = 4.5V ~ 6.0V, IOUT = 100mA
VIN = 5.0V, IOUT = 10mA ~ 100mA
VIN = 5.0V, IOUT = 100mA
VIN = 5.0V, RL = 0.1Ω
Short Circuit Current
Efficiency
910mA
VIN = 5.0V, IOUT = 100mA
VIN = 5.0V, IOUT = 100mA
62.2%
Output Ripple With Optional Filter
70mVp-p
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MC34063A
LINEAR INTEGRATED CIRCUIT
EXTERNAL CURRENT BOOST CONNECTIONS FOR IC PEAK GREATER THAN 1.5A
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MC34063A
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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MC34063A
LINEAR INTEGRATED CIRCUIT
DESIGN FORMULA TABLE
CALCULATION
STEP-DOWN
STEP-UP
VOLTAGE-INVERTING
tON
tOFF
VOUT + VF
VIN - VCE(SAT)
(tON+tOFF MAX
)
CT
ISW
RS
4x10-5 tON
2IOUT(MAX)
0.3/ISW
4x10-5 tON
4x10-5 tON
0.3/ISW
0.3/ISW
L(MIN)
CO
IOUT tON
VRIPPLE(P-P)
VCE(SAT)
VF
- Saturation voltage of the output switch.
- Forward voltage drop of the ringback rectifier.
The following power supply characteristics must be chosen:
VIN
- Nominal input voltage.
Desired output voltage, VOUT =1.25(1+R2/R1)
VOUT
IOUT
FMIN
-
- Desired output current.
- 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.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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