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參數(shù)資料
| 型號(hào)： | TL1454Y |
| 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(yè)數(shù)： | 8/24頁(yè) |
| 文件大小： | 390K |
| 代理商： | TL1454Y |
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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
Error amplifier common-mode input voltage
3.6
20
V
–0.2
1.45
V
Output voltage, VO
Output current, IO
COMP source current
20
V
±
40
–45
mA
μ
A
μ
A
mA
k
pF
k
kHz
COMP sink current
100
Reference output current
1
COMP dc load resistance
100
Timing capacitor, CT
Timing resistor, RT
Oscillator frequency
10
4000
5.1
100
50
2000
Operating free air temperature TA
Operating free-air temperature, TA
TL1454C
TL1454I
–20
–40
85
85
°
C
electrical characteristics over recommended operating free-air temperature range, V
CC
= 6 V,
f
osc
= 500 kHz (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454
UNIT
MIN
1.23
TYP
1.25
MAX
1.28
V f
Vref
Output voltage REF
Output voltage, REF
IO = 1 mA,
IO = 1 mA
VOC = 3.6 V to 20 V,
IO = 0.1 mA to 1 mA
TA = TA(min) to 25
°
C,
TA = 25
°
C to 85
°
C,
Vref = 0 V
TA = 25
°
C
V
1.2
1.31
Input regulation
IO = 1 mA
2
6
mV
Output regulation
1
7.5
mV
Output voltage change with temperature
IO = 1 mA
IO = 1 mA
–12.5
–1.25
12.5
mV
–12.5
–2.5
12.5
IOS
Short-circuit output current
30
mA
undervoltage lockout (UVLO)
PARAMETER
TEST CONDITIONS
TL1454
TYP
2.9
UNIT
MIN
MAX
VIT+
VIT–
Vhys
Positive-going threshold voltage
V
Negative-going threshold voltage
TA = 25
°
C
2.7
V
Hysteresis, VIT+ – VIT–
100
200
mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
TL1454
TYP
UNIT
MIN
MAX
VIT
Vstby
VI(latched)
VIT(COMP)
Input threshold voltage
TA = 25
°
C
0.95
1
1.05
V
Standby voltage
No pullup
140
185
230
mV
Latched-mode input voltage
60
120
mV
Comparator threshold voltage
COMP1, COMP2
1
V
Input source current
TA = 25
°
C,
VO(SCP) = 0
–5
–15
–20
μ
A
This symbol is not presently listed within EIA/JEDEC standards for semiconductor symbology.
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