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參數(shù)資料
| 型號： | TL1454AY |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT |
| 中文描述： | 雙通道脈寬調(diào)制（PWM）控制電路 |
| 文件頁數(shù)： | 10/27頁 |
| 文件大?。?/td> | 409K |
| 代理商： | TL1454AY |
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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, V
CC
= 6 V,
f
osc
= 500 kHz (unless otherwise noted) (continued)
supply current
PARAMETER
TEST CONDITIONS
TL1454A
TYP
UNIT
MIN
MAX
ICC(stby)
Standby supply current
RT open, CT = 1.5 V, No load,
VO (COMP1, COMP2) = 1.25 V,
RT = 10 k
,
50% duty cycle,
3.1
6
mA
ICC(average)
Average supply current
CT = 120 pF,
Outputs open
3.5
7
mA
electrical characteristics, V
CC
= 6 V, f
osc
= 500 kHz, T
A
= 25
°
C (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454AY
TYP
1.26
UNIT
MIN
MAX
Vref
Output voltage, REF
Input regulation
Output regulation
IO = 1 mA
VOC = 3.6 V to 20 V,
IO = 0.1 mA to 1 mA
IO = 1 mA
IO = 1 mA
Vref = 0 V
V
IO = 1 mA
2
1
mV
mV
Output voltage change with temperature
–
1.25
mV
–
2.5
30
IOS
Short-circuit output current
mA
undervoltage lockout (UVLO)
PARAMETER
TEST CONDITIONS
TL1454AY
MIN
UNIT
TYP
2.9
MAX
VIT+
VIT
–
Vhys
Positive-going threshold voltage
V
Negative-going threshold voltage
2.7
V
Hysteresis, VIT+
–
VIT
–
200
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
TL1454AY
MIN
UNIT
TYP
MAX
VIT
Vstby
VI(latched)
VIT(COMP)
Input threshold voltage
Standby voltage
1
V
No pullup
185
mV
Latched-mode input voltage
Comparator threshold voltage
Input source current
60
1
mV
V
μ
A
COMP1, COMP2
VO(SCP) = 0
–
15
This symbol is not presently listed within EIA/JEDEC standards for semiconductor symbology.
oscillator
PARAMETER
TEST CONDITIONS
TL1454AY
TYP
500
UNIT
MIN
MAX
fosc
Frequency
Standard deviation of frequency
Frequency change with voltage
CT = 120 pF,
RT = 10 k
kHz
kHz
kHz
50
10
–
2
VCC = 3.6 V to 20 V
TA = TA(min) to 25
°
C
TA = 25
°
C to 85
°
C
Frequency change with temperature
kHz
–
10
1.8
1.1
Maximum ramp voltage
Minimum ramp voltage
V
V
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