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參數資料
| 型號： | TPS62103DG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, SOIC-8 |
| 文件頁數： | 24/27頁 |
| 文件大?。?/td> | 537K |
| 代理商： | TPS62103DG4 |
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TPS62100, TPS62101, TPS62102, TPS62103
MULTIMODE LOW POWER BUCK CONVERTER
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
general information
The TPS6210x family of devices are low-power, synchronous buck controllers with integrated FETS. The thrust
of these devices is to facilitate the construction of low-cost, small, high-frequency and fast-response dc-to-dc
converters that operate from either one or two li-ion cells. Synchronous rectification allows for higher operating
efficiency than relying on a Schottky diode alone. Shifting from a fixed-frequency PWM mode of operation to
a fixed-current variable frequency mode during light loads preserves efficiency and increases battery life in this
situation.
modes of operation
The TPS6210x family has four distinct modes of operation: automatic-constant frequency (or high-power
mode), automatic-variable frequency (or low-power mode), forced-constant frequency, and forced-variable
frequency. The mode that the chip is in is controlled by the MODE pin. Allowing this pin to float lets the chip
automatically transition between the high-power mode and the low-power mode. The chip selects which mode
to operate in depending upon load current and voltage. If the mode pin is forced high, the chip operates in the
forced-constant frequency PWM mode. If the pin is driven low, the chip operates in the forced variable frequency
mode. Detailed descriptions of the modes follow.
forced constant frequency (MODE = high)
In this mode, the chip behaves like a standard buck regulator with a synchronous rectifier added. The
synchronous rectifier turns on shortly after the buck switch turns off, and the buck switch turns on shortly after
the synchronous rectifier turns off. During the small time interval when neither the buck switch nor the
synchronous rectifier is turned on, an optional small external schottky diode carries the inductor freewheel
current.
In this mode, the error amplifier is used in a normal feedback arrangement, forcing the divided output voltage
to be equal to the 0.8-V reference. Also, note that the overall converter should be designed so that it always
operates in the continuous conduction region, (i.e. the inductor current should never be allowed to decay to
zero). If the inductor current decays to zero, the control loop characteristics change dramatically. Consequently,
the loop must be designed for the worst case load condition and is not optimal in the general sense for a
continuous mode converter.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS62103DR | 功能描述:開關變換器、穩(wěn)壓器與控制器 Multimode 2MHz Sync Sync Buck Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS62103DRG4 | 功能描述:開關變換器、穩(wěn)壓器與控制器 Multimode 2MHz Synch Buck Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS62110EVM-101 | 功能描述:電源管理IC開發(fā)工具 TPS62110 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS62110EVM-346 | 功能描述:電源管理IC開發(fā)工具 TPS62110EVM-346 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS62110GRSAR | 制造商:Texas Instruments 功能描述: |
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