TL1451AMFK [TI]
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS; 双脉宽调制控制电路
| 型号： | TL1451AMFK |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| 文件： | 总29页 (文件大小：426K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
D, DB, N, NS, PW, OR J PACKAGE
Complete PWM Power Control Circuitry
(TOP VIEW)
Completely Synchronized Operation
Internal Undervoltage Lockout Protection
Wide Supply Voltage Range
REF
SCP
2IN+
2IN–
2FEEDBACK
2DTC
CT
RT
1IN+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Internal Short-Circuit Protection
Oscillator Frequency . . . 500 kHz Max
ERROR
AMPLIFIER 2
ERROR
AMPLIFIER 1 1IN–
1FEEDBACK
1DTC
Variable Dead Time Provides Control Over
Total Range
2OUT
1OUT
GND
Internal Regulator Provides a Stable 2.5-V
Reference Supply
V
CC
Available in Q-Temp Automotive
HighRel Automotive Applications
Configuration Control / Print Support
Qualification to Automotive Standards
FK PACKAGE
(TOP VIEW)
description
3
2
1
20 19
1IN+
1IN–
2IN+
4
5
6
7
8
18
17
16
15
14
The TL1451A 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 TL1451A contains an on-chip 2.5-V
regulator, two error amplifiers, an adjustable
oscillator, two dead-time comparators, undervol-
tage lockout circuitry, and dual common-emitter
output transistor circuits.
2IN–
NC
NC
1FEEDBACK
IDTC
2FEEDBACK
2DTC
9
10 11 12 13
The uncommitted output transistors provide
common-emitter output capability for each
controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time
control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The
on-chip oscillator can be operated by terminating RT and CT. During low V
lockout control circuit feature locks the outputs off until the internal circuitry is operational.
conditions, the undervoltage
CC
TheTL1451ACischaracterizedforoperationfrom–20°Cto85°C. TheTL1451AQischaracterizedforoperation
from –40°C to 125°C. The TL1451AM is characterized for operation from –55°C to 125°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
SMALL
OUTLINE
(D)
SMALL
SMALL
OUTLINE
(NS)
CHIP
CARRIER
(FK)
CERAMIC
DIP
T
A
PLASTIC DIP
(N)
TSSOP
(PW)
OUTLINE
†
†
(DB)
(J)
–20°C to 85°C
–40°C to 125°C
–55°C to 125°C
—
TL1451AQD
—
TL1451ACDB
TL1451ACN
TL1451ACNS TL1451ACPW
—
—
—
—
—
—
—
—
—
—
—
—
TL1451AMFK
TL1451AMJ
†
The DB and PW packages are only available left-end taped and reeled (add LE suffix, i.e., TL1451ACPWLE).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
functional block diagram
V
CC
9
RT
CT
2
1
11
2 DTC
14
13
12
10
16
IN+
+
–
ERROR
AMPLIFIER 2
2 OUTPUT
IN–
2 FEEDBACK
1 FEEDBACK
PWM
COMP
Oscillator
1/2 V
ref
5
Reference
Voltage
REF
12 kΩ
15
SCP
170 kΩ
UVLO
R
R
S
3
4
IN+
+
–
ERROR
AMPLIFIER 1
7
8
1 OUTPUT
IN–
PWM
COMP
6
1 DTC
GND
COMPONENT COUNT
Resistors
65
8
Capacitors
Transistors
JFETs
105
18
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
†
absolute maximum ratings over operating free-air temperature range
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V
CC
Amplifier input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
Collector output voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V
Collector output current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mA
Continuous power total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
I
O
O
Operating free-air temperature range, T C suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20°C to 85°C
A
Q suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 125°C
M suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
Storage temperature range, T
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATING TABLE
T
≤ 25°C
DERATING FACTOR
T
= 70°C
T
= 85°C
T = 125°C
A
A
A
A
PACKAGE
POWER RATING
1088 mW
775 mW
ABOVE T = 25°C
POWER RATING
POWER RATING
POWER RATING
A
D
DB
N
8.7 mW/°C
6.2 mW/°C
8.0 mW/°C
4.0 mW/°C
6.7 mW/°C
11.0 mW/°C
11.0 mW/°C
696 mW
566 mW
218 mW
—
496 mW
403 mW
1000 mW
500 mW
640 mW
520 mW
—
NS
PW
FK
J
320 mW
260 mW
—
838 mW
536 mW
436 mW
168 mW
275 mW
275 mW
1375 mW
1375 mW
880 mW
715 mW
880 mW
715 mW
recommended operating conditions
MIN
MAX
50
UNIT
Supply voltage, V
CC
3.6
V
V
Amplifier input voltage, V
1.05
1.45
50
I
Collector output voltage, V
V
O
Collector output current, I
20
mA
µA
kΩ
pF
kΩ
kHz
O
Current into feedback terminal
Feedback resistor, R
45
100
150
5.1
F
Timing capacitor, C
15000
100
500
85
T
Timing resistor, R
T
Oscillator frequency
1
C suffix
Q suffix
M suffix
–20
–40
–55
Operating free-air temperature, T
125
125
°C
A
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
electrical characteristics over recommended operating free-air temperature range, V
f = 200 kHz (unless otherwise noted)
= 6 V,
CC
reference section
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
Output voltage (pin 16)
I
= 1 mA
2.4
2.5
–0.1%
–0.2%
2
2.6
±1%
±1%
12.5
7.5
V
O
T
= –20°C to 25°C
= 25°C to 85°C
A
Output voltage change with temperature
T
A
Input voltage regulation
Output voltage regulation
Short-circuit output current
V
= 3.6 V to 40 V
CC
= 0.1 mA to 1 mA
mV
mV
mA
I
O
1
V
= 0
3
10
30
O
†
All typical values are at T = 25°C.
A
undervoltage lockout section
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
Upper threshold voltage (V
Lower threshold voltage (V
)
)
2.72
2.6
V
V
CC
CC
I
= 0.1 mA,
T = 25°C
A
O(ref)
Hysteresis (V
CC
)
80
120
1.9
mV
V
Reset threshold voltage (V
CC
)
1.5
†
All typical values are at T = 25°C.
A
short-circuit protection control section
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
0.75
230
120
–20
Input threshold voltage (SCP)
Standby voltage (SCP)
T
= 25°C
0.65
140
0.7
185
60
V
A
No pullup
No pullup
mV
mV
µA
V
Latched input voltage (SCP)
Input (source) current
V = 0.7 V,
T
A
= 25°C
–10
–15
1.18
I
Comparator threshold voltage (FEEDBACK)
†
All typical values are at T = 25°C.
A
oscillator section
TL1451C
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
Frequency
C
C
= 330 pF,
= 330 pF,
R
R
= 10 kΩ
= 10 kΩ
200
10%
kHz
T
T
Standard deviation of frequency
Frequency change with voltage
T
T
V
CC
= 3.6 V to 40 V
1%
T
= –20°C to 25°C
= 25°C to 85°C
–0.4%
–0.2%
±2%
±2%
A
Frequency change with temperature
T
A
†
All typical values are at T = 25°C.
A
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
dead-time control section
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Input bias current (DTC)
1
µA
µA
V
Latch mode (source) current (DTC)
Latched input voltage (DTC)
T
= 25°C
–80
2.3
–145
A
I
O
= 40 µA
Zero duty cycle
2.05
1.45
2.25
Input threshold voltage at f = 10 kHz (DTC)
V
Maximum duty cycle
1.2
†
All typical values are at T = 25°C.
A
error-amplifier section
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
±6
Input offset voltage
Input offset current
Input bias current
V
O
V
O
V
O
(FEEDBACK) = 1.25 V
(FEEDBACK) = 1.25 V
(FEEDBACK) = 1.25 V
mV
nA
nA
±100
500
160
1.05
to
1.45
Common-mode input voltage range
V
CC
= 3.6 V to 40 V
V
Open-loop voltage amplification
Unity-gain bandwidth
R
= 200 kΩ
70
80
1.5
80
dB
MHz
dB
V
F
Common-mode rejection ratio
Positive output voltage swing
Negative output voltage swing
Output (sink) current (FEEDBACK)
Output (source) current (FEEDBACK)
60
V
–0.1
ref
1
V
V
V
= –0.1 V,
= 0.1 V,
V
V
= 1.25 V
= 1.25 V
0.5
1.6
mA
µA
ID
O
–45
–70
ID
O
†
All typical values are at T = 25°C.
A
output section
TL1451AC
PARAMETER
TEST CONDITIONS
= 50 V
UNIT
†
MIN TYP
MAX
10
Collector off-state current
Output saturation voltage
Short-circuit output current
V
O
µA
V
I
O
= 10 mA
1.2
90
2
V
O
= 6 V
mA
†
All typical values are at T = 25°C.
A
pwm comparator section
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Zero duty cycle
2.05
1.45
2.25
Input threshold voltage at f = 10 kHz (FEEDBACK)
V
Maximum duty cycle
1.2
†
All typical values are at T = 25°C.
A
total device
TL1451AC
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
1.8
Standby supply current
Average supply current
Off-state
1.3
1.7
mA
mA
R
T
= 10 kΩ
2.4
†
All typical values are at T = 25°C.
A
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
electrical characteristics over recommended operating free-air temperature range, V
f = 200 kHz (unless otherwise noted)
= 6 V,
CC
reference section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
MIN
2.40
2.35
MAX
2.60
2.65
*±4%
12.5
15
TYP
T
A
= 25°C
2.50
2.46
–0.63%
2.0
Output voltage (pin 16)
I
= 1 mA
V
O
T
A
= MIN and 125°C
Output voltage change with temperature
Input voltage regulation
T
A
= 25°C
= 125°C
= MIN
V
= 3.6 V to 40 V
T
A
0.7
mV
CC
T
A
0.3
30
T
= 25°C
= 125°C
= MIN
1.0
7.5
A
Output voltage regulation
Short-circuit output current
I
= 0.1 mA to 1 mA
T
A
0.3
14
mV
mA
O
T
A
0.3
20
V
= 0
3
10
30
O
*These parameters are not production tested.
†
All typical values are at T = 25°C unless otherwise indicated.
A
undervoltage lockout section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
T
= 25°C
= 125°C
= MIN
2.72
1.70
3.15
2.60
1.65
3.09
120
50
A
Upper threshold voltage (V
Lower threshold voltage (V
)
)
T
A
V
CC
T
A
T
A
= 25°C
= 125°C
= MIN
T
A
V
mV
V
CC
T
A
T
A
= 25°C
= 125°C
= MIN
80
10
Hysteresis (V
CC
)
T
A
T
A
10
60
T
= 25°C
= 125°C
= MIN
1.50
0.95
1.50
A
Reset threshold voltage (V
CC
)
T
A
T
A
†
All typical values are at T = 25°C unless otherwise indicated.
A
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
short-circuit protection control section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
750
550
950
230
120
120
120
T
= 25°C
= 125°C
= MIN
650
400
800
140
700
478
880
185
60
A
Input threshold voltage (SCP)
Standby voltage (SCP)
T
A
mV
mV
mV
T
A
T
A
= 25°C
= 125°C
= MIN
Latched input voltage (SCP)
T
A
70
T
A
60
Equivalent timing resistance
170
1.18
kΩ
Comparator threshold voltage (FEEDBACK)
V
†
All typical values are at T = 25°C unless otherwise indicated.
A
oscillator section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
T
= 25°C
= 125°C
= MIN
200
195
193
2%
1%
1%
3%
A
C
R
= 330 pF,
= 10 kΩ
T
T
Frequency
T
A
kHz
T
A
Standard deviation of frequency
Frequency change with voltage
C
= 330 pF,
R
= 10 kΩ
= 25°C
= 125°C
= MIN
T
T
T
A
V
CC
= 3.6 V to 40 V
T
A
T
A
Frequency change with temperature
1.37% *±10%
*These parameters are not production tested.
†
All typical values are at T = 25°C unless otherwise indicated.
A
dead-time control section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
T
= 25°C
1
3
A
Input bias current (DTC)
µA
µA
T
A
= MIN and 125°C
Latch mode (source) current (DTC)
Latched input voltage (DTC)
–80
2.30
2.22
2.28
–145
T
A
= 25°C
= 125°C
= MIN
T
A
2.32
2.40
2.05
1.45
V
V
T
A
Zero duty cycle
*2.25
Input threshold voltage at f = 10 kHz (DTC)
*These parameters are not production tested.
Maximum duty cycle
*1.20
†
All typical values are at T = 25°C unless otherwise indicated.
A
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
error-amplifier section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
MIN
MAX
±6
T
A
= 25°C
= 125°C
= MIN
Input offset voltage
Input offset current
Input bias current
V
V
(FEEDBACK) = 1.25 V
(FEEDBACK) = 1.25 V
T
±10
±12
±100
±100
±200
500
mV
O
O
O
A
T
A
T
A
= 25°C
= 125°C
= MIN
T
A
nA
T
A
T
A
= 25°C
= 125°C
= MIN
160
100
142
V
(FEEDBACK) = 1.25 V
= 3.6 V to 40 V
T
500
nA
V
A
T
A
700
1.05
to
1.45
Common-mode input voltage range
Open-loop voltage amplification
V
CC
T
A
= 25°C
= 125°C
= MIN
70
70
64
80
80
80
1.5
80
R
= 200 kΩ
T
A
dB
F
T
A
Unity-gain bandwidth
MHz
dB
V
Common-mode rejection ratio
Positive output voltage swing
Negative output voltage swing
60
2
1
V
T
= 25°C
= 125°C
= MIN
0.5
0.4
1.6
1.8
A
Output (sink) current (FEEDBACK)
Output (source) current (FEEDBACK)
V
V
= –0.1 V, V = 1.25 V
T
A
mA
ID
O
T
A
0.3
1.7
T
= 25°C
= 125°C
= MIN
–45
–25
–15
–70
–50
–70
A
= 0.1 V, V = 1.25 V
T
A
µA
ID
O
T
A
†
All typical values are at T = 25°C unless otherwise indicated.
A
output section
PARAMETER
TL1451AQ, TL1451AM
TEST CONDITIONS
= 50 V
UNIT
†
MIN TYP
MAX
10
Collector off-state current
V
O
µA
T
= 25°C
= 125°C
= MIN
= 6 V
1.20
1.60
1.36
90
2.0
2.4
2.2
A
Output saturation voltage
T
A
V
T
A
Short-circuit output current
V
mA
O
†
All typical values are at T = 25°C unless otherwise indicated.
A
pwm comparator section
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Zero duty cycle
2.05
1.45
*2.25
Input threshold voltage at f = 10 kHz (FEEDBACK)
*These parameters are not production tested.
V
Maximum duty cycle
*1.20
†
All typical values are at T = 25°C unless otherwise indicated.
A
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
total device
TL1451AQ, TL1451AM
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
1.8
Standby supply current
Average supply current
Off-state
1.3
1.7
mA
mA
R
T
= 10 kΩ
2.4
†
All typical values are at T = 25°C unless otherwise indicated.
A
PARAMETER MEASUREMENT INFORMATION
Test
Input
S1
V
CC
= 5 V
R
L
C
0.47 µF
PE
4.7 kΩ
OUT1
OUT2
R
L
4.7 kΩ
16 15 14 13 12 11 10
TL1451A
9
1
2
3
4
5
6
7
8
R
10 kΩ
C
T
T
330 pF
Test
Input
Figure 1. Test Circuit
Oscillator Triangle Waveform
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
2.0 V
1.6 V
1.4 V
1.25 V
H
PWM Comparator Output Voltage
L
Dead Time 100%
H
Output Transistor Collector
Waveform
L
0.6 V
Protection Enable
Terminal Waveform
0 V
H
†
t
pe
Short-Circuit Protection
Comparator Output
L
3.6 V
2.8 V TYP
Power Supply Voltage
0 V
†
6
Protection Enable Time, t = (0.051 x 10 x C ) in seconds
pe pe
Figure 2. TL1451A Timing Diagram
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
TRIANGLE OSCILLATOR FREQUENCY
OSCILLATOR FREQUENCY VARIATION
vs
vs
TIMING RESISTANCE
FREE-AIR TEMPERATURE
3
2
1 M
100 k
10 k
1 k
V
R
C
= 3.6 V
= 10 kΩ
= 330 pF
= 200 kHz
V
T
A
= 5 V
= 25°C
CC
T
T
CC
f
osc
C
= 150 pF
T
1
0
C
= 1500 pF
T
–1
–2
–3
C
= 15000 pF
T
–25
0
25
50
75
100
1 k
4 k 10 k
40 k 100 k
400 k 1 M
T
A
– Free-Air Temperature – °C
R
– Timing Resistance – Ω
T
Figure 3
Figure 4
TRIANGLE WAVEFORM PERIOD
TRIANGLE WAVEFORM SWING VOLTAGE
vs
vs
TIMING CAPACITANCE
TIMING CAPACITANCE
2
10
1
10
0
10
2.6
2.4
V
R
T
A
= 5 V
= 5.1 kΩ
= 25°C
CC
T
V
R
T
A
= 5 V
= 5.1 kΩ
= 25°C
CC
T
2.2
2
1.8
1.6
1.4
1.2
1
–1
10
0.8
10
1
2
10
3
10
4
10
5
10
1
2
10
3
10
4
10
5
10
10
C
– Timing Capacitance – pF
C
– Timing Capacitance – pF
T
T
Figure 5
Figure 6
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
REFERENCE OUTPUT VOLTAGE VARIATION
REFERENCE OUTPUT VOLTAGE VARIATION
vs
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
30
20
30
20
V
I
= 40 V
V
I
= 3.6 V
= 1 mA
CC
CC
I(ref)
= 1 mA
I(ref)
10
10
0
0
–10
– 20
– 30
–10
– 20
– 30
– 25
0
25
50
75
100
– 25
0
25
50
75
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 7
Figure 8
DROPOUT VOLTAGE VARIATION
REFERENCE OUTPUT VOLTAGE
vs
vs
FREE-TEMPERATURE
SUPPLY VOLTAGE
1.1
1
3
I
= 1 mA
T
A
= 25°C
I(ref)
2.5
2
0.9
0.8
0.7
0.6
1.5
1
0.5
0
– 25
0
25
50
75
100
0
5
10
15
20
25
30
35
40
T
A
– Free-Air Temperature – °C
V
CC
– Supply Voltage – V
Figure 9
Figure 10
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
UNDERVOLTAGE LOCKOUT
UNDERVOLTAGE LOCKOUT CHARACTERISTIC
HYSTERESIS CHARACTERISTICS
300
250
200
150
100
50
3.5
3.25
3
6
5
4
3
2
1
0
T
A
= 25°C
T
A
= –20°C
T
= 85°C
A
Threshold Voltage –V
(Left Scale)
TH
Threshold Voltage –V
(Left Scale)
TL
2.75
2.5
5 V
Hysteresis Voltage
(Right Scale)
R
L
2.25
2
7,10
8
I = I
O
V
DE
0
I
O
= 10 mA
–25
0
25
50
75
100
0
1
2
3
4
5
T
A
– Free-Air Temperature – °C
V
CC
– Supply Voltage – V
Figure 11
Figure 12
SHORT-CIRCUIT PROTECTION CHARACTERISTICS
3
1.30
Short-Circuit Protection
Latch Reset Supply Voltage
(Right Scale)
2.5
2
1.25
1.20
1.15
1.10
Short-Circuit Protection
Comparator Threshold Voltage
(Left Scale)
1.5
1
– 25
0
25
50
75
100
T
A
– Free-Air Temperature – °C
Figure 13
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
PROTECTION ENABLE TIME
vs
PROTECTION ENABLE CAPACITANCE
18
15
12
9
6
3
0
0
50
100
150
200
250
C
– Protection Enable Capacitance – µF
PE
SCP
15
V
ref
16
170 kΩ
V
ref
V
ref
Short-circuit
Protection
Comparator
12 kΩ
S
R
C
PE
Protection
Latch
U.V.L.O.
ERROR AMP 1
ERROR AMP 2
1.25 V
+
–
Figure 14
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
OPEN-LOOP VOLTAGE AMPLIFICATION
ERROR AMP MAXIMUM OUTPUT VOLTAGE SWING
vs
vs
FREQUENCY
FREQUENCY
2.25
2
90
80
V
T
= 5 V
V
T
= 5 V
CC
= 25°C
CC
= 25°C
A
A
1.75
1.5
70
60
50
1.25
1
0.75
0.5
40
30
20
0.25
0
10
0
1 k
10 k
100 k
1 M
10 M
100
1 k
10 k
100 k
1 M 2 M
f – Frequency – Hz
f – Frequency – Hz
Figure 15
Figure 16
GAIN (AMPLIFIER IN
UNITY-GAIN CONFIGURATION)
vs
FREQUENCY
10
V
T
A
= 5 V
= 25°C
CC
5
0
–5
–10
–15
–20
1 k
10 k
100 k
1 M
10 M
f – Frequency – Hz
Figure 17
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
70
C :
X
47 pF
470 pF
4700 pF
V
R
C
= 5 V
= 150 Ω
= 470 pF
CC
ref
ref
60
50
40
30
T
A
= 25°C
Phase Shift
(Right Scale)
0°
Closed-Loop Gain
(Left Scale)
–10°
–20°
–30°
–40°
20
–50°
–60°
–70°
10
0
–80°
–90°
100
1 k
10 k
100 k
1 M
f – Frequency – Hz
V
ref
+
–
C
39 kΩ
39 kΩ
x
R
ref
C
ref
Test Circuit
Figure 18
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
70
V
R
C
= 5 V
= 15 Ω
= 470 pF
C :
X
47 pF
470 pF
4700 pF
CC
ref
ref
60
50
40
30
T
A
= 25°C
Phase Shift
(Right Scale)
0°
Closed-Loop Gain
(Left Scale)
–10°
–20°
–30°
–40°
20
–50°
–60°
–70°
10
0
–80°
–90°
100
1 k
10 k
f – Frequency – Hz
100 k
1 M
V
ref
+
–
C
39 kΩ
x
R
ref
C
ref
39 kΩ
Test Circuit
Figure 19
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
70
V
R
C
= 5 V
= 15 Ω
= 470 pF
C :
X
47 pF
470 pF
4700 pF
CC
ref
ref
60
50
40
30
T
A
= 25°C
Phase Shift
(Right Scale)
0°
Closed-Loop Gain
(Left Scale)
–10°
–20°
–30°
–40°
20
–50°
–60°
–70°
10
0
–80°
–90°
100
1 k
10 k
100 k
1 M
f – Frequency – Hz
V
ref
+
–
C
39 kΩ
x
R
ref
C
ref
39 kΩ
Test Circuit
Figure 20
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
70
V
C
T
A
= 5 V
= 470 pF
= 25°C
CC
ref
60
50
40
30
0°
–10°
–20°
Closed-Loop Gain
(Left Scale)
Phase Shift
(Right Scale)
–30°
–40°
20
–50°
–60°
–70°
10
0
–80°
–90°
100
1 k
10 k
100 k
1 M
f – Frequency – Hz
V
ref
+
–
39 kΩ
C
ref
39 kΩ
Test Circuit
Figure 21
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
OUTPUT SINK CURRENT
vs
COLLECTOR OUTPUT SATURATION VOLTAGE
120
110
100
90
T
A
= –20°C
T
A
= 25°C
T
A
= 85°C
80
70
60
50
40
30
20
10
0
V
CC
= 3.6 V
0
5
10
15
20
Collector Output Saturation Voltage – V
Figure 22
MAXIMUM OUTPUT VOLTAGE SWING
vs
FREE-AIR TEMPERATURE
V
V
V
V
V
V
V
–0.01
–0.02
–0.03
–0.04
–0.05
–0.06
–0.07
1
V
ref
O(ref)
O(ref)
O(ref)
O(ref)
O(ref)
O(ref)
O(ref)
33 kΩ
0.9
0.8
+
–
Maximum Output Voltage
Swing (Right Scale)
33 kΩ
R
L
0.7
0.6
0.5
100 kΩ
V
vom – 1
Maximum Output
Voltage Swing (Right Scale)
V
R
= 3.6 V
= 100 kΩ
CC
L
V
V
V
= 1.25 V
= 1.15 V (Right Scale)
= 1.35 V (Left Scale)
OM+1
OM –1
OM –1
TEST CIRCUIT
–25
0
25
50
75
100
T
A
– Free-Air Temperature – °C
Figure 23
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
OUTPUT TRANSISTOR ON DUTY CYCLE
STANDBY CURRENT
vs
SUPPLY VOLTAGE
vs
DEAD-TIME INPUT VOLTAGE
0
V
R
C
= 3.6 V
= 10kΩ
= 330 pF
CC
T
T
T
A
= 25°C
10
20
30
2
1.75
1.5
1.25
1
40
50
60
0.75
0.5
70
80
0.25
0
90
100
0
0.5
1
1.5
2
2.5
3
3.5
4
0
10
20
30
40
Dead-Time Input Voltage – V
V
CC
– Supply Voltage – V
Figure 24
Figure 25
MAXIMUM CONTINUOUS POWER DISSIPATION
STANDBY CURRENT
vs
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
1200
1100
Average Supply Current
2
16-Pin N Plastic Dip
V
C
= 6 V, R = 10 kΩ,
= 330 pF
CC
T
T
1000
900
Thermal Resistance
125°C/W
1.75
1.5
800
700
600
500
400
300
200
Stand-By Current, V
= 40 V, No Load
= 3.6 V, No Load
CC
1.25
1
Stand-By Current, V
16-Pin NS Plastic SO
CC
0.75
0.5
Thermal Resistance
250°C/W
0.25
0
100
0
–25
0
25
50
75
100
–25
0
25
50
75
100
T
A
– Free-Air Temperature
T
A
– Free-Air Temperature – °C
Figure 26
Figure 27
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
APPLICATION INFORMATION
V
CC
150 Ω
220 kΩ
470 Ω
L1
50 kΩ
33 kΩ
33 kΩ
0.47 µF
330 pF
R1
R2
33 kΩ
33 kΩ
R3
R4
Step-Up
Output
C2
C1
500 pF
V
ref
16 15 14 13 12 11 10
TL1451A
9
1
2
3
4
5
6
7
8
470 Ω
470 Ω
R5
C5
220 Ω
1 µF
L2
R6
R7
500
pF
Step-Down
Output
C4
33 kΩ
470 Ω
33 kΩ
NOTE A: Values for R1 through R7, C1 through C4, and L1 and L2 depend upon individual application.
Figure 28. High-Speed Dual Switching Regulator
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
D (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0.050 (1,27)
0.020 (0,51)
0.010 (0,25)
M
0.014 (0,35)
14
8
0.008 (0,20) NOM
0.244 (6,20)
0.228 (5,80)
0.157 (4,00)
0.150 (3,81)
Gage Plane
0.010 (0,25)
1
7
0°–8°
0.044 (1,12)
A
0.016 (0,40)
Seating Plane
0.004 (0,10)
0.010 (0,25)
0.004 (0,10)
0.069 (1,75) MAX
PINS **
8
14
16
DIM
0.197
(5,00)
0.344
(8,75)
0.394
(10,00)
A MAX
0.189
(4,80)
0.337
(8,55)
0.386
(9,80)
A MIN
4040047/D 10/96
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
D. Falls within JEDEC MS-012
22
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
DB (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
28 PINS SHOWN
0,38
0,22
0,65
28
M
0,15
15
0,15 NOM
5,60
5,00
8,20
7,40
Gage Plane
1
14
0,25
A
0°–8°
1,03
0,63
Seating Plane
0,10
2,00 MAX
0,05 MIN
PINS **
8
14
16
20
24
28
30
38
DIM
3,30
2,70
6,50
5,90
6,50
5,90
7,50
6,90
8,50
7,90
10,50
9,90
10,50 12,90
A MAX
A MIN
9,90
12,30
4040065 /C 10/95
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-150
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
FK (S-CQCC-N**)
LEADLESS CERAMIC CHIP CARRIER
28 TERMINALS SHOWN
A
B
NO. OF
18 17 16 15 14 13 12
TERMINALS
MIN
MAX
MIN
MAX
**
0.342
(8,69)
0.358
(9,09)
0.307
(7,80)
0.358
(9,09)
19
20
21
22
23
24
25
11
10
9
20
28
44
52
68
84
0.442
(11,23)
0.458
(11,63)
0.406
(10,31)
0.458
(11,63)
B SQ
A SQ
0.640
(16,26)
0.660
(16,76)
0.495
(12,58)
0.560
(14,22)
8
0.740
(18,78)
0.761
(19,32)
0.495
(12,58)
0.560
(14,22)
7
6
0.938
(23,83)
0.962
(24,43)
0.850
(21,6)
0.858
(21,8)
5
1.141
(28,99)
1.165
(29,59)
1.047
(26,6)
1.063
(27,0)
26 27 28
1
2
3
4
0.080 (2,03)
0.064 (1,63)
0.020 (0,51)
0.010 (0,25)
0.020 (0,51)
0.010 (0,25)
0.055 (1,40)
0.045 (1,14)
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
4040140/C 11/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a metal lid.
D. The terminals are gold-plated.
E. Falls within JEDEC MS-004
24
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
CERAMIC DUAL-IN-LINE
J (R-GDIP-T**)
14 LEADS SHOWN
PINS **
14
16
20
DIM
0.310
(7,87)
0.310
(7,87)
0.310
(7,87)
A MAX
B
0.290
(7,37)
0.290
(7,37)
0.290
(7,37)
A MIN
B MAX
B MIN
C MAX
C MIN
14
8
0.785
0.785
0.975
(19,94) (19,94) (24,77)
C
0.755
0.755
0.930
(19,18) (19,18) (23,62)
0.300
(7,62)
0.300
(7,62)
0.300
(7,62)
1
7
0.065 (1,65)
0.045 (1,14)
0.245
(6,22)
0.245
(6,22)
0.245
(6,22)
0.100 (2,54)
0.070 (1,78)
0.020 (0,51) MIN
A
0.200 (5,08) MAX
Seating Plane
0.130 (3,30) MIN
0.023 (0,58)
0.015 (0,38)
0°–15°
0.014 (0,36)
0.008 (0,20)
0.100 (2,54)
4040083/E 03/99
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package is hermetically sealed with a ceramic lid using glass frit.
D. Index point is provided on cap for terminal identification.
E. Falls within MIL STD 1835 GDIP1-T14, GDIP1-T16, and GDIP1-T20
25
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
N (R-PDIP-T**)
PLASTIC DUAL-IN-LINE PACKAGE
16 PINS SHOWN
PINS **
DIM
14
16
18
20
0.775
(19,69)
0.775
(19,69)
0.920
(23,37)
0.975
(24,77)
A MAX
A MIN
A
16
9
0.745
(18,92)
0.745
(18,92)
0.850
(21,59)
0.940
(23,88)
0.260 (6,60)
0.240 (6,10)
1
8
0.070 (1,78) MAX
0.020 (0,51) MIN
0.310 (7,87)
0.290 (7,37)
0.035 (0,89) MAX
0.200 (5,08) MAX
Seating Plane
0.125 (3,18) MIN
0.100 (2,54)
0°–15°
0.021 (0,53)
0.015 (0,38)
0.010 (0,25)
M
0.010 (0,25) NOM
14/18 PIN ONLY
4040049/C 08/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001 (20-pin package is shorter than MS-001).
26
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
NS (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,51
1,27
14
M
0,25
0,35
8
0,15 NOM
5,60
5,00
8,20
7,40
Gage Plane
1
7
0,25
0°–10°
A
1,05
0,55
Seating Plane
0,10
2,00 MAX
0,05 MIN
PINS **
14
16
20
24
DIM
10,50
10,50
9,90
12,90
12,30
15,30
A MAX
A MIN
9,90
14,70
4040062/B 02/95
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15.
27
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
MECHANICAL DATA
PW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,30
M
0,10
0,65
0,19
14
8
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
0,25
1
7
0°–8°
A
0,75
0,50
Seating Plane
0,10
0,15
0,05
1,20 MAX
PINS **
8
14
16
20
24
28
DIM
3,10
2,90
5,10
4,90
5,10
4,90
6,60
6,40
7,90
9,80
9,60
A MAX
A MIN
7,70
4040064/F 01/97
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-153
28
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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Copyright 1999, Texas Instruments Incorporated
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