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參數(shù)資料
| 型號(hào)： | TL3845Y |
| 廠(chǎng)商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, UUC8 |
| 封裝： | DIE-8 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 171K |
| 代理商： | TL3845Y |
TL284x, TL384x
CURRENT-MODE PWM CONTROLLERS
SLVS038E – JANUARY 1989 – REVISED DECEMBER 1999
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, VCC = 15 V (see
Note 4), RT = 10 k, CT = 3.3 nF (unless otherwise specified) (continued)
current-sense section
PARAMETER
TEST CONDITIONS
TL284x
TL384x
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
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
dB
Input bias current
–2
–10
–2
–10
A
Delay time to output
150
300
150
300
ns
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.
output section
PARAMETER
TEST CONDITIONS
TL284x
TL384x
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
High level output voltage
IOH = –20 mA
13
13.5
13
13.5
V
High-level output voltage
IOH = –200 mA
12
13.5
12
13.5
V
Low level output voltage
IOL = 20 mA
0.1
0.4
0.1
0.4
V
Low-level output voltage
IOL = 200 mA
1.5
2.2
1.5
2.2
V
Rise time
CL = 1 nF,
TA = 25°C
50
150
50
150
ns
Fall time
CL = 1 nF,
TA = 25°C
50
150
50
150
ns
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
PARAMETER
TL284x
TL384x
UNIT
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
Start threshold voltage
TLx842, TLx844
15
16
17
14.5
16
17.5
V
Start threshold voltage
TLx843, TLx845
7.8
8.4
9
7.8
8.4
9
V
Minimum operating voltage after startup
TLx842, TLx844
9
10
11
8.5
10
11.5
V
Minimum operating voltage after startup
TLx843, TLx845
7
7.6
8.2
7
7.6
8.2
V
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
TL384x
UNIT
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
Maximum duty cycle
TLx842, TLx843
95%
97%
100%
95%
97%
100%
Maximum duty cycle
TLx844, TLx845
46%
48%
50%
46%
48%
50%
Minimum duty cycle
0
All typical values are at TA = 25°C.
NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.
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相關(guān)代理商/技術(shù)參數(shù) |
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| TL384X | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLERS |
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| TL384XD | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLERS |
| TL384XD-8 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLERS |
| TL384XP | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLERS |
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