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TL1454AY Folha de dados(PDF) 8 Page - Texas Instruments

Nome de Peças TL1454AY
Descrição Electrónicos  DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
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TL1454AY Folha de dados(HTML) 8 Page - Texas Instruments

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TL1454A, TL1454AY
DUALCHANNEL PULSEWIDTHMODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A− MAY 2002 − REVISED SEPTEMBER 2002
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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
TL1454AC
−20
85
°C
electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
fosc = 500 kHz (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Vref
Output voltage, REF
IO = 1 mA,
TA = 25°C
1.22
1.26
1.32
V
Vref
Output voltage, REF
IO = 1 mA
1.20
1.34
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
TL1454A
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 −
TA = 25 C
100
200
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIT
Input threshold voltage
TA = 25°C
0.93
1
1.07
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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