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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)
C
T
R
T
ERROR
IN+
AMPLIFIER 1 IN–
1 FEEDBACK
1 DEAD-TIME CONTROL
1 OUTPUT
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
{
REF
SCP
IN+ ERROR
IN– AMPLIFIER 2
2 FEEDBACK
2 DEAD-TIME CONTROL
2 OUTPUT
V
CC
}
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 R
T
(pin 2) and C
T
(pin 1). During low-V
CC
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
VCC
9
REF
Vref = 2.5 V
16
Reference
Voltage
2.5 V
2V
1.4 V
CT
1
RT
2
Triangle
Oscillator
PWM Comparator 1
7
1 OUTPUT
1 IN+
1 IN–
1 FEEDBACK
2 FEEDBACK
2 IN+
2 IN–
3
4
5
12
14
13
Error Amp.1
1
Error Amp.2
10
2.5 V
2
2.5 V
PWM Comparator 2
2 OUTPUT
SCP
15
UVLO†
8
GND
† UVLO = Undervoltage Lockout Protection
6
1 DEAD-TIME CONTROL
11
2 DEAD-TIME CONTROL
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.
Copyright
©
1990, Texas Instruments Incorporated
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, V
CC
(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, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 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
N
NS
TA
≤
25°C
POWER RATING
1000 mW
725 mW
DERATING FACTOR
ABOVE TA = 25°C
8 mW/°C
5.8 mW/°C
TA = 85°C
POWER RATING
520 mW
397 mW
recommended operating conditions
MIN
Supply voltage, VCC
Amplifier input voltage, VI
Collector output voltage, VO
Collector output current
Current into feedback terminal
Feedback resistor, RF
Timing capacitor, CT
Timing resistor, RT
Oscillator frequency
Operating free-air temperature, TA
100
150
5.1
1
– 20
15000
100
500
85
3.6
1.05
MAX
40
1.45
50
20
45
UNIT
V
V
V
mA
µA
kΩ
pF
kΩ
kHz
°C
electrical characteristics over recommended operating free-air temperature range, V
CC
= 6 V,
f = 200 kHz (unless otherwise noted)
reference section
PARAMETER
Output voltage (pin 16)
Output voltage change with temperature
Input regulation
Output regulation
Short-circuit output current
† All typical values are at TA = 25°C.
TEST CONDITIONS
IO = 1 mA
TA = – 20°C to 25°C
TA = 25°C to 85°C
VCC = 3.6 V to 40 V
IO = 0.1 mA to 1 mA
VO = 0
3
MIN
2.4
TYP†
2.5
– 0.1%
– 0.2%
2
1
10
MAX
2.6
±1%
±1%
12.5
7.5
30
mV
mV
mA
UNIT
V
2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
electrical characteristics over recommended operating free-air temperature range, V
CC
= 6 V,
f = 200 kHz (unless otherwise noted) (continued)
undervoltage lockout section
PARAMETER
Upper threshold voltage (pin 9)
Lower threshold voltage (pin 9)
Hysteresis (pin 9)
TEST CONDITIONS
IOref = 0.1 mA,
IOref = 0.1 mA,
IOref = 0.1 mA,
TA = 25°C
TA = 25°C
TA = 25°C
80
MIN
TYP†
2.72
2.6
120
MAX
UNIT
V
V
mV
oscillator section
PARAMETER
Frequency
Standard deviation of frequency
Frequency change with voltage
Frequency change with temperature
tem erature
TEST CONDITIONS
CT = 330 pF, RT = 10 kΩ
VCC, TA, RT, CT values are constant
VCC = 3.6 V to 40 V
TA = –20°C to 25°C
TA = 25°C to 85°C
MIN
TYP†
200
10%
1%
– 0.4%
– 0.2%
±
2%
±
2%
MAX
UNIT
kHz
dead-time control section
PARAMETER
Input bias current (pins 6 and 11)
Zero duty cycle
Input threshold voltage at f = 10kHz (pins 6 and 11)
Maximum duty cycle
1.2
2.05
1.45
TEST CONDITIONS
MIN
TYP†
MAX
1
2.25
V
UNIT
µA
error-amplifier section
PARAMETER
Input offset voltage
Input offset current
Input bias current
Common-mode input voltage range
g
g
Open-loop voltage amplification
Unity-gain bandwidth
Common-mode rejection ratio
Positive output voltage swing
Negative output voltage swing
Output (sink) current (pins 5 and 12)
Output (source) current (pins 5 and 12)
VID = – 0.1 V,
VID = 0.1 V,
VO = 1.25 V
VO = 1.25 V
0.5
– 45
1.6
– 70
60
Vref – 0.1
1
TEST CONDITIONS
VO (pins 5 and 12) = 1.25 V
VO (pins 5 and 12) = 1.25 V
VO (pins 5 and 12) = 1.25 V
VCC = 3.6 V to 40 V
RF = 200 kΩ
1.05
to
1.45
70
80
1.5
80
160
MIN
TYP†
MAX
±
6
±100
500
UNIT
mV
nA
nA
V
dB
MHz
dB
V
V
mA
µA
output section
PARAMETER
Collector off-state current
off state
Output saturation voltage
Short-circuit output current
† All typical values are at TA = 25°C.
TEST CONDITIONS
VCC = 0, VO = 50 V
VO = 50 V
IO = 10 mA
VO = 6 V
1.2
90
MIN
TYP†
MAX
10
10
2
UNIT
µA
V
mA
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
3
TL1453C
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990
electrical characteristics over recommended operating free-air temperature range, V
CC
= 6 V,
f = 200 kHz (unless otherwise noted) (continued)
pwm comparator section
PARAMETER
Input threshold voltage at f = 10 kHz (pins 5 and 12)
Input (sink) current (pins 5 and 12)
Input (source) current (pins 5 and 12)
TEST CONDITIONS
Zero duty cycle
Maximum duty cycle
VI = 1.25 V
VI = 1.25 V
1.2
0.5
– 45
MIN
TYP†
2.05
1.45
1.6
– 70
MAX
2.25
UNIT
V
mA
µA
total device
PARAMETER
Standby supply current
Average supply current
† All typical values are at TA = 25°C.
TEST CONDITIONS
Off-state
RT = 10 kΩ
MIN
TYP†
1.3
1.7
MAX
1.8
2.4
UNIT
mA
mA
test circuit
1
CT
330 pF
CT
TL1453C
REF
SCP
IN+2
IN+1
IN–1
1 FEEDBACK
1 DEAD-TIME
CONTROL
1 OUTPUT
GND
VCC
9
RL
OUTPUT 1
IN–2
2 FEEDBACK
16
15
14
13
12
TEST
INPUT
OUTPUT 2
RL
VCC
0.1
µF
10 kΩ
RT
2
3
4
5
RT
TEST
INPUT
6
7
8
2 DEAD-TIME 11
CONTROL
2 OUTPUT
10
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
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