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부품번호 | MC33023 기능 |
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기능 | High Speed Single-Ended PWM Controller | ||
제조업체 | Motorola Semiconductors | ||
로고 | |||
전체 19 페이지수
High Speed Single-Ended
PWM Controller
The MC34023 series are high speed, fixed frequency, single–ended pulse
width modulator controllers optimized for high frequency operation. They are
specifically designed for Off–Line and DC–to–DC converter applications
offering the designer a cost–effective solution with minimal external
components. These integrated circuits feature an oscillator, a temperature
compensated reference, a wide bandwidth error amplifier, a high speed
current sensing comparator, and a high current totem pole output ideally
suited for driving a power MOSFET.
Also included are protective features consisting of input and reference
undervoltage lockouts each with hysteresis, cycle–by–cycle current limiting,
and a latch for single pulse metering.
The flexibility of this series allows it to be easily configured for either
current mode or voltage mode control.
• 50 ns Propagation Delay to Output
• High Current Totem Pole Output
• Wide Bandwidth Error Amplifier
• Fully–Latched Logic with Double Pulse Suppression
• Latching PWM for Cycle–By–Cycle Current Limiting
• Soft–Start Control with Latched Overcurrent Reset
• Input Undervoltage Lockout with Hysteresis
• Low Start–Up Current (500 µA Typ)
• Internally Trimmed Reference with Undervoltage Lockout
• 90% Maximum Duty Cycle (Externally Adjustable)
• Precision Trimmed Oscillator
• Voltage or Current Mode Operation to 1.0 MHz
• Functionally Similar to the UC3823
Order this document by MC34023/D
MC34023
MC33023
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
PIN CONNECTIONS
16
Vref
4
Clock
5
RT
6
CT
7
Ramp
Error Amp 3
Output
Noninverting
Input
2
Inverting
Input
1
8
Soft–Start
Simplified Application
Oscillator
5.1V
Reference
UVLO
Latching
Error PWM
Amp
Soft–Start
10 Ground
This device contains 176 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
15
VCC
13
VC
14
Output
12
Power
Ground
11
Current
9
Limit Ref
Current
Limit/
Shutdown
Error Amp
Inverting Input
Error Amp
Noninverting Input
Error Amp Output
1
2
3
16 Vref
15 VCC
14 Output
Clock 4
RT 5
CT 6
Ramp 7
Soft–Start 8
13 VC
12 Power Ground
11 Current Limit
Reference
10 Ground
9 Current Limit/
Shutdown
(Top View)
ORDERING INFORMATION
Device
MC33023P
MC33023DW
MC34023P
Operating
Temperature Range Package
Plastic DIP
TA = – 40° to +105°C
SO–16L
TA = 0° to +70°C Plastic DIP
© Motorola, Inc. 1996
Rev 2
1
MC34023 MC33023
100 k
1
Figure 1. Timing Resistor versus
Oscillator Frequency
35 7 9
VCC = 15 V
TA = + 25°C
24 68
CT =
10 k 1. 100 nF
2. 47 nF
3. 22 nF
4. 10 nF
5. 4.7 nF
6. 2.2 nF
1.0 k 7. 1.0 nF
8. 470 pF
9. 220 pF
470100
1000
104
105
106
fosc, OSCILLATOR FREQUENCY (Hz)
107
Figure 2. Oscillator Frequency versus Temperature
1200 RT = 1.2 k
1.0 MHz CT = 1.0 nF
1000
800
VCC = 15 V
600
400
400 kHz
RT = 3.6 k
CT = 1.0 nF
200
–0 55 – 25
50 kHz
RT = 36 k
CT = 1.0 nF
0 25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
125
Figure 3. Error Amp Open Loop Gain and
Phase versus Frequency
120 0
100
80
60
Phase
40
Gain
45
90
20
0 135
– 20 10
100 1.0 k 10 k 100 k 1.0 M 10 M
f, FREQUENCY (Hz)
Figure 4. PWM Comparator Zero Duty Cycle
Threshold Voltage versus Temperature
1.30
1.28
VCC = 15 V
Pin 7(9) = 0 V
1.26
1.24
1.22
1.20
– 55 – 25
0 25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
125
2.55 V
Figure 5. Error Amp Small Signal
Transient Response
2.5 V
2.45 V
0.1 µs/DIV
4
Figure 6. Error Amp Large Signal
Transient Response
3.0 V
2.5 V
2.0 V
0.1 µs/DIV
MOTOROLA ANALOG IC DEVICE DATA
4페이지 MC34023 MC33023
Figure 18. Representative Block Diagram
VCC Vin
RT
CT
16
Vref
4
Clock
5
6
Ramp 7
Error Amp Output
3
2
Noninverting Input
Inverting Input
1
8
Soft–Start
CSS
Reference
Regulator
Oscillator
4.2 V Vref
UVLO
VCC
UVLO
9.2 V
1.25 V
PWM
Comparator
Error
Amp
+
9.0 µA
R
Q
S
PWM Latch
Current
Limit
0.5 V
R
Q Soft–Start Latch
S
Shutdown
15
VCC
13
VC
14
Output
12
Power Ground
11
Current Limit Reference
9
Current Limit/Shutdown
1.4 V
10 Ground
Figure 19. Current Limit Operating Waveforms
CT
Clock
Soft–Start
Error Amp Output
Ramp
PWM
Comparator
Output
MOTOROLA ANALOG IC DEVICE DATA
7
7페이지 | |||
구 성 | 총 19 페이지수 | ||
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |