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TL1454ACDBR bảng dữ liệu(PDF) 9 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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TL1454A, TL1454AY
DUALCHANNEL PULSEWIDTHMODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A− MAY 2002 − REVISED SEPTEMBER 2002
9
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)
oscillator
PARAMETER
TEST CONDITIONS
TL1454A
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,
TA = 25°C
10
kHz
Frequency change with temperature
TA = TA(min) to 25°C
−2
±30
kHz
Frequency change with temperature
TA = 25°C to 85°C
−10
±30
kHz
Maximum ramp voltage
1.8
V
Minimum ramp voltage
1.1
V
dead-time control (DTC)
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIT
Input threshold voltage
Duty cycle = 0%
0.98
1.1
1.22
V
VIT
Input threshold voltage
Duty cycle = 100%
0.38
0.5
0.62
V
VI(latched) Latched-mode input voltage
1.2
V
IIB
Common-mode input bias current
DTC1, IN1+
≈ 1.2 V
4
µA
Latched-mode (source) current
TA = 25°C
− 100
µA
error-amplifier
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIO
Input offset voltage
6
mV
IIO
Input offset current
VO = 1.25 V,
VIC = 1.25 V
100
nA
IIB
Input bias current
VO = 1.25 V,
VIC = 1.25 V
− 160
− 500
nA
VICR
Input voltage range
VCC = 3.6 V to 20 V
− 0.2 to 1.40
V
AV
Open-loop voltage gain
RFB = 200 kΩ
70
80
dB
Unity-gain bandwidth
3
MHz
CMRR
Common-mode rejection ratio
60
80
dB
VOM(max) Positive output voltage swing
2.3
2.43
V
VOM(min)
Negative output voltage swing
0.63
0.8
V
IO+
Output sink current
VID = − 0.1 V,
VO = 1.20 V
0.1
0.5
mA
IO−
Output source current
VID = 0.1 V,
VO = 1.80 V
−45
−70
µA
output
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IO = − 8 mA
VCC−2
4.5
VOH
High-level output voltage
IO = −8 mA @ VCC = >10 V
VCC−2.3 V
V
VOH
High-level output voltage
IO = − 40 mA
VCC−2
4.4
V
IO = 40 mA @ VCC = >10 V
VCC−2.3 V
VOL
Low-level output voltage
IO = 8 mA
0.1
0.4
V
VOL
Low-level output voltage
IO = 40 mA
1.8
2.5
V
trv
Output voltage rise time
CL = 2000 pF,
TA = 25°C
220
ns
tfv
Output voltage fall time
CL = 2000 pF,
TA = 25°C
220
ns


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