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參數(shù)資料
| 型號： | TPS61040DRV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES |
| 中文描述： | 低功耗DC / DC升壓轉(zhuǎn)換器采用SOT - 23和兒子套票 |
| 文件頁數(shù)： | 4/22頁 |
| 文件大小： | 491K |
| 代理商： | TPS61040DRV |
www.ti.com
SOFT START
All inductive step-up converters exhibit high inrush current during start-up if no special precaution is made. This
can cause voltage drops at the input rail during start up and may result in an unwanted or early system shut
down.
The TPS61040/41 limits this inrush current by increasing the current limit in two steps starting from
I
LIM
2
for the next 256 cycles, and then full current limit (see
Figure 14
).
I
LIM
4
for 256
cycles to
ENABLE
Pulling the enable (EN) to ground shuts down the device reducing the shutdown current to 1
μ
A (typical).
Because there is a conductive path from the input to the output through the inductor and Schottky diode, the
output voltage is equal to the input voltage during shutdown. The enable pin needs to be terminated and should
not be left floating. Using a small external transistor disconnects the input from the output during shutdown as
shown in
Figure 18
.
UNDERVOLTAGE LOCKOUT
An undervoltage lockout prevents misoperation of the device at input voltages below typical 1.5 V. When the
input voltage is below the undervoltage threshold, the main switch is turned off.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature (unless otherwise noted)
(1)
DISSIPATION RATING TABLE
TPS61040
TPS61041
SLVS413C–OCTOBER 2002–REVISED AUGUST 2007
UNIT
Supply voltages on pin V
IN(2)
Voltages on pins EN, FB
(2)
Switch voltage on pin SW
(2)
Continuous power dissipation
Operating junction temperature
Storage temperature
Lead temperature (soldering 10 seconds)
–0.3 V to 7 V
–0.3 V to V
IN
+ 0.3 V
30 V
See Dissipation Rating Table
–40
°
C to 150
°
C
–65
°
C to 150
°
C
260
°
C
T
J
T
stg
(1)
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltage values are with respect to network ground terminal.
(2)
DERATING
FACTOR
ABOVE
T
A
= 25
°
C
3.5 mW/
°
C
13 mW/
°
C
T
≤
25
°
C
POWER RATING
T
= 70
°
C
POWER RATING
T
= 85
°
C
POWER RATING
PACKAGE
R
θ
JA
DBV
DRV
250
°
C/W
76
°
C/W
357 mW
1300 mW
192 mW
688 mW
140 mW
500 mW
4
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Copyright 2002–2007, Texas Instruments Incorporated
Product Folder Link(s):
TPS61040 TPS61041
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| TPS61040DRVR | 功能描述:LED照明驅(qū)動器 28-V 400mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61040DRVRG4 | 功能描述:LED照明驅(qū)動器 28V 400-mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61040DRVT | 功能描述:LED照明驅(qū)動器 28V 400mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61040DRVTG4 | 功能描述:LED照明驅(qū)動器 28V 400-mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61040EVM-001 | 功能描述:電源管理IC開發(fā)工具 TPS61040 Boost Conv Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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