- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383963 > TPS61058DRC (Texas Instruments, Inc.) SYNCHRONOUS BOOST CONVERTER WITH DOWN MODE HIGH POWER WHITE LED DRIVER PDF資料下載
參數(shù)資料
| 型號： | TPS61058DRC |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | SYNCHRONOUS BOOST CONVERTER WITH DOWN MODE HIGH POWER WHITE LED DRIVER |
| 中文描述： | 同步升壓轉(zhuǎn)換器斷電模式高功率白光LED驅(qū)動 |
| 文件頁數(shù)： | 12/30頁 |
| 文件大?。?/td> | 1684K |
| 代理商： | TPS61058DRC |
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頁當(dāng)前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第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
www.ti.com
Softstart
Overvoltage Protection (OVP)
Efficiency and Sense Voltage
Thermal Shutdown
TPS61058
TPS61059
SLVS572B–APRIL 2005–REVISED DECEMBER 2005
DETAILED DESCRIPTION (continued)
To avoid high inrush current during start-up, special care is taken to control the inrush current. When the device
is first enabled, the output capacitor is charged with a constant pre-charge current of 115mA (typ) until either the
output voltage is typically 0.1V below the input voltage or the feedback voltage is 500mV (typ). The rectifying
switch is current limited during the pre-charge phase. This also limits the output current under short circuit
conditions at the output.
The fixed pre-charge current during start-up allows the device to start up without problems when driving single
die white LEDs as long as the LED start-up current is set to a value lower than the pre-charge current (84 mA
min.). Refer to the application section for more details.
When the device has finished start-up and is ready for high current operation, the device forces IOK output to
ground, starts switching and regulates the LED current to the desired value (e.g. torch or flashlight current level).
As with any current source, the output voltage rises when the load becomes high impedance or gets
disconnected. To prevent the output voltage exceeding the maximum switch voltage rating (7 V) of the main
switch, an overvoltage protection circuit is integrated. As soon as the output voltage exceeds the OVP threshold,
the converter stops switching and the output voltage decreases. When the output voltage falls below the OVP
threshold, the converter continues operation until the output voltage exceeds the OVP threshold again.
The voltage across the sense resistor (R
) has a direct effect of the converter efficiency. Because the sense
voltage does not contribute to the output power (P
LED
), the lower this voltage the higher the efficiency. It is
therefore recommended to operate with a sense voltage of approximately 0.75V at maximum LED current.
An internal thermal shutdown is implemented and turns off the internal MOSFETs when the typical junction
temperature of 140
°
C is exceeded. The thermal shutdown has a hysteresis of typically 20
°
C. Refer to the
Thermal Information
section.
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS61059DRC | SYNCHRONOUS BOOST CONVERTER WITH DOWN MODE HIGH POWER WHITE LED DRIVER |
| TPS61072DDC | 90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH |
| TPS61073DDC | 90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH |
| TPS6107X | 90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH |
| TPS61106EVM-216 | For Dual Output, Single-Cell Boost Converter(用于雙輸出，單電池升壓轉(zhuǎn)換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61058DRCR | 功能描述:LED照明驅(qū)動器 Hi-Power Single Cell White LED Driver 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 |
| TPS61058DRCR | 制造商:Texas Instruments 功能描述:IC LED DRIVER PHOTO FLASH 10-SON |
| TPS61058DRCRG4 | 功能描述:LED照明驅(qū)動器 Hi-Power Single Cell White LED Driver 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 |
| TPS61059 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SYNCHRONOUS BOOST CONVERTER WITH DOWN MODE HIGH POWER WHITE LED DRIVER |
| TPS61059DRC | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SYNCHRONOUS BOOST CONVERTER WITH DOWN MODE HIGH POWER WHITE LED DRIVER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。