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TL1454ACNSR Arkusz danych(PDF) 10 Page - Texas Instruments

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Numer części TL1454ACNSR
Szczegółowy opis  DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
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TL1454A, TL1454AY
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A– MAY 2002 – REVISED SEPTEMBER 2002
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
fosc = 500 kHz (unless otherwise noted) (continued)
supply current
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ICC(stby)
Standby supply current
RT open,
CT = 1.5 V, No load,
VO (COMP1, COMP2) = 1.25 V,
3.1
6
mA
ICC(average)
Average supply current
RT = 10 kΩ,
50% duty cycle,
CT = 120 pF,
Outputs open
3.5
7
mA
electrical characteristics, VCC = 6 V, fosc = 500 kHz, TA = 25°C (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454AY
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Vref
Output voltage, REF
IO = 1 mA
1.26
V
Input regulation
VOC = 3.6 V to 20 V,
IO = 1 mA
2
mV
Output regulation
IO = 0.1 mA to 1 mA
1
mV
Output voltage change with temperature
IO = 1 mA
– 1.25
mV
Output voltage change with temperature
IO = 1 mA
–2.5
mV
IOS
Short-circuit output current
Vref = 0 V
30
mA
undervoltage lockout (UVLO)
PARAMETER
TEST CONDITIONS
TL1454AY
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIT +
Positive-going threshold voltage
2.9
V
VIT –
Negative-going threshold voltage
2.7
V
Vhys
Hysteresis, VIT + – VIT –
200
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
TL1454AY
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIT
Input threshold voltage
1
V
Vstby†
Standby voltage
No pullup
185
mV
VI(latched)
Latched-mode input voltage
No pullup
60
mV
VIT(COMP)
Comparator threshold voltage
COMP1, COMP2
1
V
Input source current
VO(SCP) = 0
– 15
µA
† This symbol is not presently listed within EIA / JEDEC standards for semiconductor symbology.
oscillator
PARAMETER
TEST CONDITIONS
TL1454AY
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
fosc
Frequency
CT = 120 pF,
RT = 10 kΩ
500
kHz
Standard deviation of frequency
50
kHz
Frequency change with voltage
VCC = 3.6 V to 20 V
10
kHz
Frequency change with temperature
TA = TA(min) to 25°C
– 2
kHz
Frequency change with temperature
TA = 25°C to 85°C
– 10
kHz
Maximum ramp voltage
1.8
V
Minimum ramp voltage
1.1
V


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