TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
D
D
D
D
D
D
D
Complete PWM Power Control Circuitry
Completely Synchronized Operation
Internal Undervoltage Lockout Protection
Wide Supply Voltage Range
Oscillator Frequency . . . 500 kHz Max
Variable Dead Time Provides Control
Over Total Range
Internal Regulator Provides a Stable 2.5-V
Reference Supply
N OR NS PACKAGE
(T0P VIEW)
CT
RT
ERROR
IN+
AMPLIFIER 1 IN–
1 FEEDBACK
1 DEAD-TIME CONTROL
1 OUTPUT
GND
{
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
REF
SCP
IN+ ERROR
IN– AMPLIFIER 2
2 FEEDBACK
2 DEAD-TIME CONTROL
2 OUTPUT
VCC
}
description
The TL1453C incorporates the functions required in the construction of two pulse-width-modulation control
circuits on a single monolithic chip. Designed primarily for power supply control, the TL1453C contains an
on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage
lockout circuitry, and dual common-emitter output transistor circuits.
The uncommitted output transistors provide common-emitter output capability for each controller. The internal
amplifiers exhibit a common-mode voltage range from 1.05 V to 1.45 V. The dead-time control comparator has
no offset unless externally altered and may be used to provide 0% to 100% dead time. The on-chip oscillator
may be operated by terminating RT (pin 2) and CT (pin 1). During low-VCC conditions, the undervoltage lockout
control circuit feature inhibits the output until the internal circuitry is operational.
The TL1453C is characterized for operation from –20°C to 85°C.
functional block diagram
CT
1
VCC
9
REF
1 IN+
1 IN–
1 FEEDBACK
2 FEEDBACK
2 IN+
2 IN–
Vref = 2.5 V
16
3
Error Amp.1
Reference
Voltage
2.5 V
RT
2
Triangle
Oscillator
2V
1.4 V
PWM Comparator 1
7
1 OUTPUT
4
1
5
12
Error Amp.2
14
10
13
2 OUTPUT
2.5 V
2
2.5 V
SCP
15
† UVLO = Undervoltage Lockout Protection
PWM Comparator 2
UVLO†
6
1 DEAD-TIME CONTROL
8
GND
11
2 DEAD-TIME CONTROL
Copyright 1990, Texas Instruments Incorporated
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 V
Amplifier input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
Collector output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V
Collector output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mA
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 20°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
NOTE 1: All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
N
1000 mW
8 mW/°C
520 mW
NS
725 mW
5.8 mW/°C
397 mW
DERATING FACTOR
ABOVE TA = 25°C
TA = 85°C
POWER RATING
recommended operating conditions
Supply voltage, VCC
Amplifier input voltage, VI
MIN
MAX
3.6
40
UNIT
V
1.05
1.45
V
Collector output voltage, VO
50
V
Collector output current
20
mA
Current into feedback terminal
45
µA
Feedback resistor, RF
100
Timing capacitor, CT
150
15000
Timing resistor, RT
5.1
100
kΩ
1
500
kHz
– 20
85
°C
Oscillator frequency
Operating free-air temperature, TA
kΩ
pF
electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
f = 200 kHz (unless otherwise noted)
reference section
PARAMETER
Output voltage (pin 16)
TYP†
MAX
2.4
2.5
2.6
– 0.1%
±1%
TA = 25°C to 85°C
VCC = 3.6 V to 40 V
– 0.2%
±1%
2
12.5
mV
IO = 0.1 mA to 1 mA
VO = 0
1
7.5
mV
10
30
mA
IO = 1 mA
TA = – 20°C to 25°C
Output voltage change with temperature
Input regulation
Output regulation
Short-circuit output current
† All typical values are at TA = 25°C.
2
MIN
TEST CONDITIONS
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• DALLAS, TEXAS 75265
3
UNIT
V
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
f = 200 kHz (unless otherwise noted) (continued)
undervoltage lockout section
PARAMETER
TEST CONDITIONS
Upper threshold voltage (pin 9)
MIN
Lower threshold voltage (pin 9)
IOref = 0.1 mA,
IOref = 0.1 mA,
TA = 25°C
TA = 25°C
Hysteresis (pin 9)
IOref = 0.1 mA,
TA = 25°C
TYP†
MAX
2.72
UNIT
V
2.6
V
80
120
mV
MIN
TYP†
oscillator section
PARAMETER
TEST CONDITIONS
Frequency
CT = 330 pF, RT = 10 kΩ
Standard deviation of frequency
VCC, TA, RT, CT values are constant
VCC = 3.6 V to 40 V
Frequency change with voltage
UNIT
kHz
10%
1%
TA = –20°C to 25°C
TA = 25°C to 85°C
Frequency change with temperature
tem erature
MAX
200
– 0.4%
± 2%
– 0.2%
± 2%
TYP†
MAX
dead-time control section
PARAMETER
TEST CONDITIONS
MIN
Input bias current (pins 6 and 11)
1
Zero duty cycle
Input threshold voltage at f = 10kHz (pins 6 and 11)
Maximum duty cycle
2.05
1.2
UNIT
µA
2.25
V
1.45
error-amplifier section
PARAMETER
TEST CONDITIONS
Input offset voltage
Input offset current
VO (pins 5 and 12) = 1.25 V
VO (pins 5 and 12) = 1.25 V
Input bias current
VO (pins 5 and 12) = 1.25 V
Common-mode input voltage
g range
g
VCC = 3.6 V to 40 V
Open-loop voltage amplification
RF = 200 kΩ
MIN
160
Unity-gain bandwidth
60
Positive output voltage swing
MAX
UNIT
±6
mV
±100
nA
500
nA
1.05
to
1.45
70
Common-mode rejection ratio
TYP†
V
80
dB
1.5
MHz
80
dB
Vref – 0.1
V
Negative output voltage swing
1
V
Output (sink) current (pins 5 and 12)
VID = – 0.1 V,
VO = 1.25 V
0.5
1.6
mA
Output (source) current (pins 5 and 12)
VID = 0.1 V,
VO = 1.25 V
– 45
– 70
µA
output section
PARAMETER
TEST CONDITIONS
MIN
TYP†
VCC = 0, VO = 50 V
VO = 50 V
Collector off-state
off state current
Output saturation voltage
IO = 10 mA
VO = 6 V
Short-circuit output current
† All typical values are at TA = 25°C.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MAX
10
10
1.2
90
2
UNIT
µA
V
mA
3
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
f = 200 kHz (unless otherwise noted) (continued)
pwm comparator section
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
2.05
2.25
Zero duty cycle
Input threshold voltage at f = 10 kHz (pins 5 and 12)
Maximum duty cycle
Input (sink) current (pins 5 and 12)
Input (source) current (pins 5 and 12)
1.2
1.45
UNIT
V
VI = 1.25 V
VI = 1.25 V
0.5
1.6
mA
– 45
– 70
µA
TEST CONDITIONS
MIN
TYP†
MAX
Off-state
1.3
1.8
mA
RT = 10 kΩ
1.7
2.4
mA
total device
PARAMETER
Standby supply current
Average supply current
† All typical values are at TA = 25°C.
test circuit
1
CT
330 pF
10 kΩ
2
RT
3
4
5
TEST
INPUT
6
7
8
CT
TL1453C
RT
REF
SCP
IN+2
IN+1
IN–1
1 FEEDBACK
1 DEAD-TIME
CONTROL
IN–2
2 FEEDBACK
16
0.1 µF
15
14
13
12
TEST
INPUT
2 DEAD-TIME 11
CONTROL
2 OUTPUT
10
OUTPUT 2
1 OUTPUT
GND
RL
VCC
9
VCC
RL
OUTPUT 1
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
UNIT
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
N (R-PDIP-T**)
PLASTIC DUAL-IN-LINE PACKAGE
16 PIN SHOWN
PINS **
14
16
18
20
A MAX
0.775
(19,69)
0.775
(19,69)
0.920
(23.37)
0.975
(24,77)
A MIN
0.745
(18,92)
0.745
(18,92)
0.850
(21.59)
0.940
(23,88)
DIM
A
16
9
0.260 (6,60)
0.240 (6,10)
1
8
0.070 (1,78) MAX
0.035 (0,89) MAX
0.310 (7,87)
0.290 (7,37)
0.020 (0,51) MIN
0.200 (5,08) MAX
Seating Plane
0.125 (3,18) MIN
0.100 (2,54)
0.021 (0,53)
0.015 (0,38)
0.010 (0,25) M
0°– 15°
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 then MS-001.)
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
NS (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
PINS **
14
16
20
24
A MAX
10,50
10,50
12,90
15,30
A MIN
9,90
9,90
12,30
14,70
DIM
0,51
0,35
1,27
14
0,25 M
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
2,00 MAX
0,05 MIN
0,10
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.
6
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