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)： 7/21頁
文件大?。?/td> 336K
代理商： 2845B
www.ti.com
Output 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)
Undervoltage-Lockout 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)
Pulse-Width Modulator 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)
Supply Voltage 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
13
12
MAX
MIN
13
12
MAX
I
OH
= –20 mA
I
OH
= –200 mA
I
OL
= 20 mA
I
OL
= 200 mA
C
L
= 1 nF, T
J
= 25
°
C
C
L
= 1 nF, T
J
= 25
°
C
V
CC
= 5 V, I
OL
= 1 mA
13.5
13.5
0.1
1.5
50
50
0.7
13.5
13.5
0.1
1.5
50
50
0.7
High-level output voltage
V
0.4
2.2
150
150
1.2
0.4
2.2
150
150
1.2
Low-level output voltage
V
Rise time
Fall time
UVLO saturation
ns
ns
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
15
7.8
MAX
MIN
14.5
7.8
8.5
MAX
17.5
TLx842B, TLx844B
TLx843B, TLx845B
TLx842B, TLx844B
TLx843B, TLx845B
16
8.4
10
7.6
17
16
8.4
10
7.6
Start threshold voltage
V
9
9
9
7
11
8.2
11.5
8.2
Minimum operating voltage
after start-up
V
7
(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
94
47
MAX
100
50
MIN
94
47
MAX
100
50
TL3842B, TL3843B
TL3844B, TL3845B
96
48
96
48
Maximum duty cycle
%
Minimum duty cycle
0
0
%
(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
MAX
0.5
17
MIN
MAX
0.5
17
Start-up current
Operating supply current
Limiting voltage
0.3
11
34
0.3
11
34
mA
mA
V
VFB and I
SENSE
at 0 V
I
CC
= 25 mA
30
30
(1)
(2)
Adjust V
above the start threshold before setting it to 15 V.
All typical values are at T
J
= 25
°
C.
7
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