參數(shù)資料
型號(hào): TL1451ACNSR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 0.021 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝: GREEN, PLASTIC, SOP-16
文件頁(yè)數(shù): 36/36頁(yè)
文件大?。?/td> 950K
代理商: TL1451ACNSR
TL1451A
DUAL PULSEWIDTHMODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
9
www.ti.com
total device
PARAMETER
TEST CONDITIONS
TL1451AQ, TL1451AM
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Standby supply current
Off-state
1.3
1.8
mA
Average supply current
RT = 10 k
1.7
2.4
mA
All typical values are at TA = 25°C unless otherwise indicated.
PARAMETER MEASUREMENT INFORMATION
8
7
6
5
4
3
2
1
9
10
11
12
13
14
15
16
S1
CPE
0.47
F
Test
Input
VCC = 5 V
RL
4.7 k
4.7 k
RL
OUT1
OUT2
CT
330 pF
RT
10 k
Test
Input
TL1451A
Figure 1. Test Circuit
Dead Time 100%
tpe
2.0 V
1.6 V
1.4 V
1.25 V
H
L
H
L
0.6 V
0 V
H
L
3.6 V
0 V
Oscillator Triangle Waveform
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
PWM Comparator Output Voltage
Output Transistor Collector
Waveform
Protection Enable
Terminal Waveform
Short-Circuit Protection
Comparator Output
Power Supply Voltage
Protection Enable Time, tpe = (0.051 x 106 x Cpe) in seconds
2.8 V TYP
Figure 2. TL1451A Timing Diagram
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