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TL1454IN bảng dữ liệu(PDF) 8 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
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TL1454IN bảng dữ liệu(HTML) 8 Page - Texas Instruments

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TL1454, TL1454Y
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS086B – APRIL 1995 – REVISED NOVEMBER 1997
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
recommended operating conditions
MIN
MAX
UNIT
Supply voltage, VCC
3.6
20
V
Error amplifier common-mode input voltage
– 0.2
1.45
V
Output voltage, VO
20
V
Output current, IO
±40
mA
COMP source current
–45
µA
COMP sink current
100
µA
Reference output current
1
mA
COMP dc load resistance
100
k
Timing capacitor, CT
10
4000
pF
Timing resistor, RT
5.1
100
k
Oscillator frequency
50
2000
kHz
Operating free air temperature TA
TL1454C
–20
85
°C
Operating free-air temperature, TA
TL1454I
–40
85
°C
electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
fosc = 500 kHz (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V f
Output voltage REF
IO = 1 mA,
TA = 25°C
1.23
1.25
1.28
V
Vref
Output voltage, REF
IO = 1 mA
1.2
1.31
V
Input regulation
VOC = 3.6 V to 20 V,
IO = 1 mA
2
6
mV
Output regulation
IO = 0.1 mA to 1 mA
1
7.5
mV
Output voltage change with temperature
TA = TA(min) to 25°C,
IO = 1 mA
–12.5
– 1.25
12.5
mV
Output voltage change with temperature
TA = 25°C to 85°C,
IO = 1 mA
–12.5
–2.5
12.5
mV
IOS
Short-circuit output current
Vref = 0 V
30
mA
undervoltage lockout (UVLO)
PARAMETER
TEST CONDITIONS
TL1454
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIT +
Positive-going threshold voltage
2.9
V
VIT –
Negative-going threshold voltage
TA = 25°C
2.7
V
Vhys
Hysteresis, VIT + – VIT –
100
200
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
TL1454
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIT
Input threshold voltage
TA = 25°C
0.95
1
1.05
V
Vstby†
Standby voltage
No pullup
140
185
230
mV
VI(latched)
Latched-mode input voltage
No pullup
60
120
mV
VIT(COMP)
Comparator threshold voltage
COMP1, COMP2
1
V
Input source current
TA = 25°C,
VO(SCP) = 0
–5
–15
–20
µA
† This symbol is not presently listed within EIA / JEDEC standards for semiconductor symbology.


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