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參數(shù)資料
| 型號： | 2845B |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
| 中文描述： | 高性能的電流模式PWM控制器 |
| 文件頁數(shù)： | 6/21頁 |
| 文件大?。?/td> | 336K |
| 代理商： | 2845B |
www.ti.com
Error-Amplifier Section Electrical Characteristics
V
CC
= 15 V
(1)
, R
T
= 10 k
, C
T
= 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
Current-Sense Section Electrical Characteristics
V
CC
= 15 V
(1)
, R
T
= 10 k
, C
T
= 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB, TL384xB
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
SLVS610A–AUGUST 2006–REVISED SEPTEMBER 2006
TL284xB
TYP
(2)
TL384xB
TYP
(2)
PARAMETER
TEST CONDITIONS
UNIT
MIN
2.45
MAX
2.55
–1
MIN
2.42
MAX
2.58
–2
Feedback input voltage
Input bias current
Open-loop voltage
amplification
Gain-bandwidth product
Supply-voltage rejection ratio
Output sink current
Output source current
COMP = 2.5 V
2.5
–0.3
2.5
–0.3
V
μ
A
V
O
= 2 V to 4 V
65
90
65
90
dB
0.7
60
1
0.7
60
1
MHz
dB
mA
mA
V
CC
= 12 V to 25 V
VFB = 2.7 V, COMP = 1.1 V
VFB = 2.3 V, COMP = 5 V
VFB = 2.3 V,
R
L
= 15 k
to GND
VFB = 2.7 V,
R
L
= 15 k
to GND
70
70
2
6
2
6
–0.5
–0.8
–0.5
–0.8
High-level output voltage
5
6
5
6
V
Low-level output voltage
0.7
1.1
0.7
1.1
V
(1)
(2)
Adjust V
above the start threshold before setting it to 15 V.
All typical values are at T
J
= 25
°
C.
TL284xB
TYP
(2)
TL384xB
TYP
(2)
PARAMETER
TEST CONDITIONS
UNIT
MIN
2.85
MAX
3.15
MIN
2.85
MAX
3.15
Voltage amplification
(3)(4)
Current-sense comparator
threshold
(3)
Supply-voltage rejection
ratio
(3)
Input bias current
Delay time to output
3
3
V/V
COMP = 5 V
0.9
1
1.1
0.9
1
1.1
V
V
CC
= 12 V to 25 V
70
70
dB
–2
150
–10
300
–2
150
–10
300
μ
A
ns
VFB = 0 V to 2 V
(1)
(2)
(3)
(4)
Adjust V
above the start threshold before setting it to 15 V.
All typical values are at T
= 25
°
C.
Measured at the trip point of the latch, with VFB at 0 V.
Measured between I
SENSE
and COMP, with the input changing from 0 V to 0.8 V.
6
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