- 您現在的位置：買賣IC網 > PDF目錄98280 > TPS2540RTET (TEXAS INSTRUMENTS INC) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 PDF資料下載
參數資料
| 型號： | TPS2540RTET |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | GREEN, PLASTIC, WQFN-16 |
| 文件頁數： | 19/37頁 |
| 文件大小： | 999K |
| 代理商： | TPS2540RTET |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁
SHORT
ILIMx
48000
I
R
=
SLVSAG2A
– OCTOBER 2010 – REVISED APRIL 2011
Current-Limit Thresholds
The TPS2540/40A/41 has two independent current-limit thresholds that are each programmed externally with a
resistor. The following equation programs the typical current-limit threshold:
(3)
where ISHORT is in mA and RILIMx is in kΩ. RILIMx corresponds to RILIM0 when ILIM_SEL is logic LO and to
RILIM1 when ILIM_SEL is logic HI. The ILIM_SEL pin allows the system to digitally select between two
current-limit thresholds, which is useful in end equipment that may require a lower setting when powered from
batteries vs. wall adapters.
FAULT Response
The FAULT open-drain output is asserted (active low) during an over-temperature or current limit condition. The
output remains asserted until the fault condition is removed. The TPS2540/40A/41 is designed to eliminate false
FAULT reporting by using an internal deglitch circuit for current limit conditions without the need for external
circuitry. This ensures that FAULT is not accidentally asserted due to normal operation such as starting into a
heavy capacitive load. Over-temperature conditions are not deglitched and assert the FAULT signal immediately.
Undervoltage Lockout (UVLO)
The undervoltage lockout (UVLO) circuit disables the power switch until the input voltage reaches the UVLO
turn-on threshold. Built-in hysteresis prevents unwanted oscillations on the output due to input voltage drop from
large current surges.
Thermal Sense
The TPS2540/40A/41 protects itself with two independent thermal sensing circuits that monitor the operating
temperature of the power distribution switch and disables operation if the temperature exceeds recommended
operating conditions. The device operates in constant-current mode during an over-current condition, which
increases the voltage drop across power switch. The power dissipation in the package is proportional to the
voltage drop across the power switch, so the junction temperature rises during an over-current condition. The
first thermal sensor turns off the power switch when the die temperature exceeds 135
°C and the part is in current
limit. The second thermal sensor turns off the power switch when the die temperature exceeds 155
°C regardless
of whether the power switch is in current limit. Hysteresis is built into both thermal sensors, and the switch turns
on after the device has cooled by approximately 10
°C. The switch continues to cycle off and on until the fault is
removed. The open-drain false reporting output FAULT is asserted (active low) during an over-temperature
shutdown condition.
26
Copyright
2010–2011, Texas Instruments Incorporated
相關PDF資料 |
PDF描述 |
|---|---|
| TPS2541RTET | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| TPS2550DBV | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| TPS2551DRVR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| TPS2551DRVTG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| TPS2551DRVRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2540RTET | 制造商:Texas Instruments 功能描述:IC USB SWITCH 2.6GHZ 16-WQFN |
| TPS2541ARTER | 功能描述:電源開關 IC - USB USB Charging Port Pwr Sw & Controller RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2541ARTET | 功能描述:電源開關 IC - USB USB Charging Port Pwr Sw & Controller RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2541RTER | 功能描述:電源開關 IC - USB USB Charging Port Pwr Swtch &Contrller RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2541RTET | 功能描述:電源開關 IC - USB USB Charging Port Pwr Swtch &Contrller RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
發布緊急采購，3分鐘左右您將得到回復。