TL1451 开关电源稳压集成电路
相似替换型号:
口 llt』 -rrfi
:;
MV-4J
+5VI1 A
1.4V
R209
24k
689
由 690
引脚
英文缩写
序号
①
②
③
④
⑤
⑥
⑦
③
⑨
⑩
@
@
⑩
@
⑥
⑩
集成电路引脚功能
G
振荡电睿
Rr
振荡电阻
IN1+
IN1-
同相信号 (1 )输入
1N2-
备注
电阻参数{凶}
直流电压参数 (V)
正笔接地负笔接地 电源通有信号无信号
外形参考图
反相信号。)输入
反相倍号 (2)输入
NF1
OUT1
GND
反馈倍号 (1 )
V∞
OUT2
ADJ1
NF2
电源+12V
倍号 (1 )输出
撞地
。
12
信号 (2)输出
倍号 (1 )调节
反馈倍号 (2)
1N21N2+
SCP
反相信号 (2)输入
A队J2
倍号 (2)调节
16
9
同相信号 (2)输入
8
集成电路引脚功能参数
UNISONIC TECHNOLOGIES CO., LTD
TL1451
LINEAR INTEGRATED CIRCUIT
DUAL
PULSE-WIDTH-MODULATION
CONTROL CIRCUITS
SOP-16
DESCRIPTION
The UTC TL1451 incorporates on a single monolithic chip
all the functions required in the construction of two
pulse-width-modulation (PWM) control circuits. Designed primarily
for power supply control, the UTC TL1451 contains an on-chip
2.5V regulator, two error amplifiers, an adjustable oscillator, two
dead-time comparators, undervoltage lockout circuitry, and dual
common –emitter output transistor circuits.
DIP-16
TSSOP-16
Lead-free:
TL1451L
Halogen-free: TL1451G
FEATURES
*Complete PWM power control circuitry
*Completely synchronized operation
*Internal undervoltage lockout protection
*Wide supply voltage range
*Internal Short-Circuit protection
*Oscillator frequency 500kHz max
*Variable dead time provides control over total range
*Internal regulator provides a stable 2.5V reference supply
ORDERING INFORMATION
Normal
TL1451-S16-R
TL1451-S16-T
TL1451-P16-R
TL1451-P16-T
TL1451-D16-T
Ordering Number
Lead Free
TL1451L-S16-R
TL1451L-S16-T
TL1451L-P16-R
TL1451L-P16-T
TL1451L-D16-T
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Copyright © 2008 Unisonic Technologies Co., LTD
Halogen Free
TL1451G-S16-R
TL1451G-S16-T
TL1451G-P16-R
TL1451G-P16-T
TL1451G-D16-T
Package
Packing
SOP-16
SOP-16
TSSOP-16
TSSOP-16
DIP-16
Tape Reel
Tube
Tape Reel
Tube
Tube
1 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
CT
1
16
REF
RT
2
15
SCP
1 IN+
3
14 2 IN+
1 IN-
4
13 2 IN-
1 FEEDBACK
5
12
2 FEEDBACK
1 DTC
6
11
2 DTC
1 OUT
7
10
2 OUT
GND
8
9
ERROR
AMPLIFIER 1
ERROR
AMPLIFIER 2
Vcc
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
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2 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VCC
VIN
VOUT
IOUT
VALUE
UNIT
51
V
20
V
51
V
21
mA
DIP-16
1000
mW
Power Dissipation
PD
SOP-16
500
TSSOP-16
700
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-20 ~ +85
°C
Storage Temperature
TSTG
-40 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
Supply Voltage
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current(each Transistor)
Current into Feedback Terminal
Feedback Resistor
Timing Capacitor
Timing Resistor
Oscillator frequency
Operating Temperature
SYMBOL
VCC
VIN
VOUT
IOUT
IFB
RF
CT
RT
FOSC
TOPR
MIN
3.6
1.05
TYP
100
150
8
1
-20
MAX
50
1.45
50
20
45
UNIT
V
V
V
mA
μA
kΩ
pF
kΩ
kHz
°C
15000
100
350
85
ELECTRICAL CHARACTERISTICS(VCC=6V, f=200kHz, Ta=25°C, unless otherwise specified.)
PARAMETER
Reference Section
Output Voltage
SYMBOL
VOUT
Output Voltage Change with Temperature
△VIN
△VOUT
Input Voltage Regulation
Output Voltage Regulation
Short-Circuit Output Current
Undervoltage Lockout Section
Threshold Voltage (Vcc)
IOUT
Upper
Lower
Hysteresis (Vcc)
Reset Threshold voltage (Vcc)
Short-Circuit Protection Control Section
Input Threshold Voltage(SCP)
Standby Voltage(SCP)
Latched Input Voltage (SCP)
Input (source) Current
Comparator Threshold Voltage (FEEDBACK)
IOUT=1mA
Ta= -20°C ~ 25°C
Ta= 25°C ~ 85°C
Vcc=3.6V ~ 40V
IOUT=0.1mA ~ 1mA
VOUT=0
MIN
TYP
MAX
UNIT
2.4
2.6
±1
±1
12.5
7.5
30
V
3
2.5
-0.1
-0.2
2
1
10
80
1.5
2.72
2.6
120
1.9
VTHR
VHYS
VIN(THR)
VSTN-BY
VIN(LAT)
IIN(source)
VTHR
UNISONIC TECHNOLOGIES CO., LTD
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TEST CONDITIONS
IOUT(REF)=0.1mA
No pullup
No pullup
VIN=0.7V
0.65
140
-10
0.7
185
60
-15
1.18
%
mV
mV
mA
V
V
mV
V
0.75
230
120
-20
V
mV
mV
μA
V
3 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
Oscillator Section
Frequency
Standard deviation of frequency
Frequency Change with Voltage
SYMBOL
F
Frequency Change with Temperature
Dead-Time Control Section
Input bias Current (DTC)
Latch mode (source) Current (DTC)
Latched Input Voltage (DTC)
TEST CONDITIONS
CT=330pF, RT=10kΩ
CT=330pF, RT=10kΩ
Vcc=3.6V ~ 40V
TA=-20°C ~ 25°C
TA=25°C ~ 85°C
200
10%
1%
-0.4
-0.2
VIN
IOUT=40μA
Zero duty cycle
Maximum duty cycle
Error-Amplifier Section
Input Offset Voltage
Input Offset Current
Input Bias current
VIN(OFF)
IIN(OFF)
IIN(BIAS)
VOUT (FEEDBACK)=1.25V
VOUT (FEEDBACK)=1.25V
VOUT (FEEDBACK)=1.25V
Common-Mode Input Voltage Range
VIN(CM)
Vcc=3.6V ~ 40V
RF=200kΩ
BG
RR
VOUT
VOUT
IOUT(SIN)
IOUT(SOU)
-80
2.3
1.2
ISTN-BY
UNISONIC TECHNOLOGIES CO., LTD
2.05
1.45
1. 05~
1.45
70
60
Vref-0.1
±2
±2
2.25
±6
±100
500
0.5
-45
Zero duty cycle
Maximum duty cycle
80
1.5
80
Off-state
RT=10kΩ
1.6
-70
1.2
90
1.2
%
μA
μA
V
V
mV
nA
nA
V
1
VID=-0.1V, VOUT=1.25V
VID=0.1V, VOUT=1.25V
UNIT
kHz
-145
160
IOFF
VOUT=50V
VOUT(SAT) IOUT=10mA
IOUT(SHT) VOUT=6V
VI(THR)
MAX
1
VIN(THR)
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TYP
IIN(BIAS)
Input threshold Voltage at f=10kHz (DTC)
Open-loop Voltage Amplification
Unity-gain Bandwidth
Common-mode Rejection Ratio
Positive Output Voltage Swing
Negative Output Voltage Swing
Output (sink) Current (FEEDBACK)
Output (source) Current (FEEDBACK)
Output Section
Collector off-state Current
Output Saturation Voltage
Short-Circuit Output Current
PWM Comparator Section
Input Threshold Voltage at f=10kHz
(FEEDBACK)
TOTAL DEVICE
Standby Supply Current
Average Supply Current
MIN
10
2
2.05
1.45
2.25
1.3
1.7
1.8
2.4
dB
MHz
dB
V
V
mA
μA
μA
V
mA
V
mA
mA
4 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
Test
Input
S1
VCC = 5V
CPE
0.47μF
RL
4.7kΩ
OUT1
16 15 14 13 12 11 10 9
OUT2
RL
4.7kΩ
UTC TL1451
1
CT
330pF
2
3
4
5
6
7
8
RT
10kΩ
Test
Input
TIMING DIAGRAM
Oscillator Triangle Waveform
2.0V
1.6V
1.4V
1.25V
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
PWM Comparator Output Voltage
H
L
Dead Time 100%
H
Output Transistor Collector
Waveform
L
0.6V
Protection Enable
Terminal Waveform
0V
Tpe*
H
Short-Circuit Protection
Comparator Output
Power Supply Voltage
2.8V TYP
L
3.6V
0V
* Protection Enable Time, tpe = (0.051 × 106 × Cpe) in seconds
UNISONIC TECHNOLOGIES CO., LTD
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5 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
HIGH-SPEED DUAL SWITCHING REGULATOR
VCC
220kΩ
0.47μF
150Ω
470Ω
50kΩ
33kΩ
L1
330pF
R1
R2
33kΩ
R3
C2
33kΩ
33kΩ
Step-Up
Output
R4
C1
500pF
Vref
16 15 14 13 12 11 10 9
UTC TL1451
1
2
3
4
5
6
7
8
470Ω
470Ω
R5
C5
220Ω
500pF
1μF
L2
R6
C4
33kΩ
470Ω
33kΩ
R7
Step-Down
Output
NOTE A: Values for R1 through R7, C1 through C4, and L1 and L2 depend upon individual application.
UNISONIC TECHNOLOGIES CO., LTD
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6 of 14
QW-R103-011.D
TL1451
TYPICAL CHARACTERISTICS
Protection Enable Time vs
Protection Enable Capacitance
Protection Enable Time, tpe (s)
18
15
12
9
6
3
0
0
150
250
50
200
100
Protection Enable Capacitance, CPE (μF)
VREF
SCP
16
15
170kΩ
Short-circuit
Protection
Comparator
12kΩ
VREF
S
R
Protection
Latch
CPE
ERROR AMP 1
VREF
U.V.L.O.
ERROR AMP 2
+
1.25V
-
Closed-Loop Gain and Phase Shift vs Frequency
60
50
VCC = 5V
RREF = 150Ω
CREF = 470pF
Ta = 25℃
CX:
47pF
470pF
4700pF
Phase Shift
(Right Scale)
Closed-Loop Gain
(Left Scale)
0°
-10°
-20°
-30°
-40°
40
30
Phase Shift
70
Closed-Loop Gain (dB)
LINEAR INTEGRATED CIRCUIT
-50°
-60°
-70°
-80°
-90°
20
10
0
100
10k
1k
100k
1M
Frequency, f (Hz)
VREF
+
-
39kΩ
39kΩ
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
CX
RREF
CREF
7 of 14
QW-R103-011.D
TL1451
TYPICAL CHARACTERISTICS(cont.)
Closed-Loop Gain and Phase Shift vs Frequency
VCC = 5V
RREF = 15Ω
CREF = 470pF
Ta = 25℃
Closed-Loop Gain (dB)
60
50
CX:
Phase Shift
(Right Scale)
Closed-Loop Gain
(Left Scale)
47pF
470pF
4700pF
0°
-10°
-20°
-30°
-40°
40
30
Phase Shift
70
-50°
-60°
-70°
-80°
-90°
20
10
0
100
1k
1M
100k
10k
Frequency, f (Hz)
VREF
+
-
CX
39kΩ
RREF
CREF
39kΩ
Closed-Loop Gain and Phase Shift vs Frequency
60
50
VCC = 5V
RREF = 15Ω
CREF = 470pF
Ta = 25℃
CX:
Phase Shift
(Right Scale)
Closed-Loop Gain
(Left Scale)
47pF
470pF
4700pF
0°
-10°
-20°
-30°
-40°
40
30
Phase Shift
70
Closed-Loop Gain (dB)
LINEAR INTEGRATED CIRCUIT
-50°
-60°
-70°
-80°
-90°
20
10
0
100
1k
100k
10k
1M
Frequency, f (Hz)
VREF
+
-
39kΩ
39kΩ
UNISONIC TECHNOLOGIES CO., LTD
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CX
RREF
CREF
8 of 14
QW-R103-011.D
TL1451
TYPICAL CHARACTERISTICS(Cont.)
Closed-Loop Gain and Phase Shift vs Frequency
70
60
VCC = 5V
CREF = 470pF
Ta= 25℃
50
40
Closed-Loop Gain
(Left Scale)
0°
-10°
-20°
-30°
-40°
Phase Shift
(Right Scale)
30
Phase Shift
Closed-Loop Gain (dB)
LINEAR INTEGRATED CIRCUIT
-50°
-60°
-70°
-80°
-90°
20
10
0
100
10k
1k
100k
1M
Frequency, f (Hz)
VREF
+
-
39kΩ
39kΩ
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
CREF
9 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
O u tp u t S in k C u rre n t v s
C o lle c to r O u tp u t S a tu ra tio n V o lta g e
120
T a = -2 0 ℃
110
Ta = 25℃
Output Sink Current (mA)
100
Ta = 85℃
90
80
70
60
50
40
30
20
V C C = 3 .6 V
10
0
5
0
20
15
10
C o lle cto r O u tp u t S a tu ra tio n V o lta g e (V )
VO (REF) -0.01
1
VO (REF) -0.02
0.9
Maximum Output Voltage
Swing (Right Scale)
VO (REF) -0.03
VO (REF) -0.04
VO (REF) -0.05
0.7
Maximum Output
Voltage Swing (Right Scale)
0.6
0.5
VO (REF) -0.06
VO (REF) -0.07
-25
0.8
0
25
50
75
Maximum Output Voltage Swing, VOM (V)
Maximum Output Voltage Swing, VOM (V)
Maximum Output Voltage Swing vs
Free-Air Temperature
VREF
33kΩ
+
33kΩ
-
RL
Vvom - 1 100kΩ
VCC = 3.6V
RL = 100kΩ
VOM+1 = 1.25V
VOM-1 = 1.15V (Right Scale)
VOM-1 = 1.35V (Left Scale)
100
Free-Air Temperature, Ta (℃)
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10 of 14
QW-R103-011.D
TL1451
TYPICAL CHARACTERISTICS
Triangle Oscillator Frequency vs
Timing Resistance
Triangle Oscillator Frequency, tOSC (Hz)
1M
3
VCC = 5V
Ta = 25
Oscillator Frequency Variation, ΔfOSC (%)
LINEAR INTEGRATED CIRCUIT
CT = 150pF
100k
CT = 1500pF
10k
CT = 15000pF
1k
4k
1k
10k
40k
100k
0
-1
-2
-25
50
75
Free - Air Temperature, Ta ( )
Triangle Waveform Awing Voltage vs
Timing Capacitance
Triangle Waveform Period vs
Timing Capacitance
102
2.4
2.2
Triangle Waveform Period (µ s)
VCC = 5V
RT = 5.1kΩ
Ta = 25℃
2
1.8
1.6
1.4
1.2
100
VCC = 5V
RT = 5.1kΩ
Ta = 25℃
101
100
1
10-1
101
0.8
101
102
103
104
105
Timing Capacitance, CT (pF)
Reference Output Voltage Variation vs
Free-Air Temperature
30
20
VCC = 3.6V
II(REF) = 1mA
10
0
-10
-20
-30
-25
0
25
50
75
100
Free - Air Temperature, Ta (℃)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
102
103
104
105
Timing Capacitance, CT (pF)
Reference Output Voltage Variation, ΔVO(REF) (mV)
Reference Output Voltage Variation, ΔVO(REF) (mV)
25
0
Timing Resistance, RT (Ω)
2.6
Triangle Waveform Swing Voltage (V)
VCC = 3.6V
RT = 10kΩ
CT = 330pF
fOSC = 200kHz
1
-3
1M
400k
2
Oscillator Frequency Variation vs
Free-Air Temperature
Reference Output Voltage Variation vs
Free-Air Temperature
30
20
VCC = 40V
II(REF) = 1mA
10
0
-10
-20
-30
-25
0
25
50
75
100
Free - Air Temperature, Ta (℃)
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QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Dropout Voltage Variation vs
Free-Air Temperature
Reference Output Voltage vs Supply Voltage
1.1
Ta = 25℃
II(REF) = 1mA
2.5
1
Dropout Voltage Variation (V)
Reference Output Voltage, VO(REF) (V)
3
2
1.5
1
0.5
0.9
0.8
0.7
0.6
0
10
15
20
25
30
35
40
0
-25
Supply Voltage, VCC (V)
Undervoltage Lockout Hysteresis
Characteristics
Ta = 25℃ Ta = 20℃
Output Collector Voltage, VCE (V)
Ta = 85℃
5
4
3
5V
RL
2
7,12
I = IO
8
VDE
1
IO =10mA
0
0
1
2
3
4
3.5
300
3.25
2.75
100
Threshold Voltage
(Right Scale)
2.25
0
75
100
Short-Circuit Protection
Comparator Threshold Voltage
(Left Scale)
1.5
1
1.10
75
100
Free - Air Temperature, Ta (℃)
UNISONIC TECHNOLOGIES CO., LTD
VCC = 5V
Ta = 25℃
5
0
G-Gain (dB)
2
RS-Latch Reset Supply Voltage (V)
Compretor Threshold Voltage (V)
50
Gain (Amplfier In Unity-Gain Configuration) vs
Frequency
2.5
1.20
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25
0
Free - Air Temperature, Ta (℃)
Short-Circuit Protection
Latch Reset Supply Voltage
(Right Scale)
50
50
2
-25
3
25
150
2.5
5
1.30
0
200
Threshold Voltage-VTL
(Left Scale)
10
-25
250
Threshold Voltage-VTH
(Left Scale)
3
Short-Circuit Protection Characteristics
1.15
100
II(REF) = 1mA
Supply Voltage, VCC (V)
1.25
75
50
Undervoltage Lockout Characteristics
Undervoltage Lockout Threshold Voltage (V)
6
25
Free - Air Temperature, Ta (℃)
Undervoltage Lockout Hystersis Voltage (mV)
5
0
-5
-10
-15
-20
1k
10k
100k
1M
10M
Frequency, f (Hz)
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QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Open-Loop Voltage Amplification vs
Frequency
2.25
90
VCC = 5V
Ta = 25℃
2
Open-Loop Voltage Amplification (dB)
Error Amp Maxmum Output Voltage Swing (V)
Error Amp Maximum Output Voltage Swing vs
Frequency
1.75
1.5
1.25
1
1.75
0.5
0.25
0
10k
1k
1M
100k
VCC = 5V
Ta = 25℃
80
70
60
50
40
30
20
10
0
100
10M
1k
10k
100k
Frequency, f (Hz)
Frequency, f (Hz)
Output Transistor on Duty Cycle vs
Dead-Time Input Voltage
Standby Current vs
Supply Voltage
1M 2M
VCC = 3.6V
RT = 10kΩ
CT = 330pF
20
Ta = 25℃
2
Standby Current, ICC (mA)
Output Transistor “On” Duty Cycle (%)
0
10
30
40
50
60
70
80
1.75
1.5
1.25
1
0.75
0.5
0.25
90
100
0
0
0.5
1
1.5
2
2.5
3
3.5
0
4
Stand-By Current, VCC = 40V, No Load
1.25
1
Stand-By Current, VCC = 3.6V, No Load
0.75
0.5
0.25
0
-25
0
25
50
75
Free-Air Temperature, Ta (℃ )
100
UNISONIC TECHNOLOGIES CO., LTD
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Maximum Continuous Power Dissipation (mW)
Supply Current, ICC (mA)
1.5
40
Maximum Continuous Power Disspation vs
Free-Air Temperature
Average Supply Current
VCC = 6V, RT = 10kΩ
CT = 330pF
1.75
30
Supply Voltage, VCC (V)
Standby Current vs
Free-Air Temperature
2
20
10
Dead-Time Input Voltage (V)
1200
1100
1000
DIP-16
Thermal Resistance
125℃/W
900
800
700
600
500
SOP-16
400
Thermal Resistance
250℃/W
300
200
100
0
-25
0
25
50
75
100
Free-Air Temperature, Ta (℃ )
13 of 14
QW-R103-011.D
TL1451
LINEAR INTEGRATED CIRCUIT
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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