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參數(shù)資料
| 型號(hào)： | TL284xP |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CURRENT-MODE PWM CONTROLLERS |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 171K |
| 代理商： | TL284XP |
TL284x, TL384x
CURRENT-MODE PWMCONTROLLERS
SLVS038E – JANUARY 1989 – REVISED DECEMBER 1999
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, V
CC
= 15 V (see
Note 4), R
T
= 10 k
, C
T
= 3.3 nF (unless otherwise specified) (continued)
current-sense section
PARAMETER
TEST CONDITIONS
TL284x
TYP
TL384x
TYP
UNIT
MIN
MAX
MIN
MAX
Voltage amplification
See Notes 6 and 7
2.85
3
3.13
2.85
3
3.15
V/V
Current-sense comparator threshold
COMP at 5 V,
See Note 6
0.9
1
1.1
0.9
1
1.1
V
Supply-voltage rejection ratio
VCC = 12 V to 25 V,
See Note 6
70
70
dB
μ
A
ns
Input bias current
–2
–10
–2
–10
Delay time to output
All typical values are at TA = 25
°
C.
NOTES:
4. Adjust VCC above the start threshold before setting it to 15 V.
6. These parameters are measured at the trip point of the latch, with VFB at 0 V.
7. Voltage amplification is measured between ISENSE and COMP, with the input changing from 0 V to 0.8 V.
150
300
150
300
output section
PARAMETER
TEST CONDITIONS
TL284x
TYP
13.5
TL384x
TYP
13.5
UNIT
MIN
13
MAX
MIN
13
MAX
High level output voltage
High-level output voltage
IOH = –20 mA
IOH = –200 mA
IOL = 20 mA
IOL = 200 mA
CL = 1 nF,
CL = 1 nF,
V
12
13.5
12
13.5
Low level output voltage
Low-level output voltage
0.1
0.4
0.1
0.4
V
1.5
2.2
1.5
2.2
Rise time
TA = 25
°
C
TA = 25
°
C
50
150
50
150
ns
Fall time
All typical values are at TA = 25
°
C.
NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.
undervoltage-lockout section
50
150
50
150
ns
PARAMETER
TL284x
TYP
TL384x
TYP
UNIT
MIN
15
MAX
MIN
14.5
MAX
17.5
Start threshold voltage
TLx842, TLx844
16
17
16
V
TLx843, TLx845
7.8
8.4
9
7.8
8.4
9
Minimum operating voltage after startup
TLx842, TLx844
TLx843, TLx845
9
7
10
7.6
11
8.2
8.5
10
7.6
11.5
8.2
V
7
All typical values are at TA = 25
°
C.
NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.
pulse-width-modulator section
PARAMETER
TL284x
TYP
97%
TL384x
TYP
97%
UNIT
MIN
95%
MAX
100%
MIN
95%
MAX
100%
Maximum duty cycle
TLx842, TLx843
TLx844, TLx845
46%
48%
50%
46%
48%
50%
Minimum duty cycle
All typical values are at TA = 25
°
C.
NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.
0
0
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