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PDF TL1451 Data sheet ( Hoja de datos )
| Número de pieza | TL1451 | |
| Descripción | DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TL1451 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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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.
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
Ordering Number
Lead Free
Halogen Free
TL1451L-D16-T
TL1451G-D16-T
- TL1451G-P16-R
- TL1451G-S16-R
Package
DIP-16
TSSOP-16
SOP-16
DIP-16
TSSOP-16
Packing
Tube
Tape Reel
Tape Reel
MARKING
DIP-16
SOP-16 / TSSOP-16
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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1 page  
TL1451
TEST CIRCUIT
S1
CPE
0.47μF
LINEAR INTEGRATED CIRCUIT
Test
Input VCC = 5V
RL
4.7kΩ
16 15 14 13 12 11 10 9
UTC TL1451
12345678
RL
4.7kΩ
OUT1
OUT2
CT
330pF
TIMING DIAGRAM
Oscillator Triangle Waveform
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
PWM Comparator Output Voltage
RT
10kΩ
Test
Input
Output Transistor Collector
Waveform
Protection Enable
Terminal Waveform
Short-Circuit Protection
Comparator Output
Power Supply Voltage
2.8V TYP
* Protection Enable Time, tpe = (0.051 × 106 × Cpe) in seconds
2.0V
1.6V
1.4V
1.25V
H
L
Dead Time 100%
H
L
0.6V
0V
Tpe*
H
L
3.6V
0V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TL1451
TYPICAL CHARACTERISTICS
Triangle Oscillator Frequency vs.
Timing Resistance
1M
VCC = 5V
TA = 25°C
CT = 150pF
100k
CT = 1500pF
10k
1k
1k
CT = 15000pF
4k 10k 40k 100k 400k 1M
Timing Resistance, RT (Ω)
Triangle Waveform Awing Voltage vs.
Timing Capacitance
2.6
VCC = 5V
2.4 RT = 8kΩ
2.2 TA = 25°C
2
1.8
1.6
1.4
1.2
1
0.8
101
102 103 104
Timing Capacitance, CT (pF)
105
Reference Output Voltage Variation vs.
Free-Air Temperature
30
VCC = 3.6V
20 II(REF) = 1mA
10
0
-10
-20
-30
-25
0 25 50 75
Free - Air Temperature, TA (°C)
100
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
LINEAR INTEGRATED CIRCUIT
Oscillator Frequency Variation vs.
Free-Air Temperature
3
VCC = 3.6V
2
RT = 10kΩ
CT = 330pF
fOSC = 200kHz
1
0
-1
-2
-3
-25
0 25 50 75
Free - Air Temperature, TA (°C)
100
Triangle Waveform Period vs.
Timing Capacitance
102
VCC = 5V
RT = 8kΩ
TA = 25°C
101
100
10-1
101
102 103 104
Timing Capacitance, CT (pF)
105
Reference Output Voltage Variation vs.
Free-Air Temperature
30
VCC = 40V
20 II(REF) = 1mA
10
0
-10
-20
-30
-25
0 25 50 75
Free - Air Temperature, TA (°C)
100
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11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TL1451.PDF ] | |
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