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參數資料
| 型號： | TPS61031RSA |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 4A SWITCH |
| 中文描述： | 96％高效同步升壓轉換器和4A條開關 |
| 文件頁數： | 12/20頁 |
| 文件大小： | 375K |
| 代理商： | TPS61031RSA |
www.ti.com
Power Save Mode and Synchronization
The SYNC pin can be used to select different operation modes. To enable power save, SYNC must be set low.
Power save mode is used to improve efficiency at light load. In power save mode the converter only operates
when the output voltage trips below a set threshold voltage. It ramps up the output voltage with one or several
pulses and goes again into power save mode once the output voltage exceeds the set threshold voltage. This
power save mode can be disabled by setting the SYNC to VBAT.
Low Battery Detector Circuit—LBI/LBO
The low-battery detector circuit is typically used to supervise the battery voltage and to generate an error flag
when the battery voltage drops below a user-set threshold voltage. The function is active only when the device is
enabled. When the device is disabled, the LBO pin is high-impedance. The switching threshold is 500 mV at LBI.
During normal operation, LBO stays at high impedance when the voltage, applied at LBI, is above the threshold.
It is active low when the voltage at LBI goes below 500 mV.
Low-EMI Switch
The device integrates a circuit that removes the ringing that typically appears on the SW node when the
converter enters discontinuous current mode. In this case, the current through the inductor ramps to zero and the
rectifying PMOS switch is turned off to prevent a reverse current flowing from the output capacitors back to the
battery. Due to the remaining energy that is stored in parasitic components of the semiconductor and the
inductor, a ringing on the SW pin is induced. The integrated antiringing switch clamps this voltage to VBAT and
therefore dampens ringing.
TPS61030
TPS61031, TPS61032
SLUS534D–SEPTEMBER 2002–REVISED APRIL 2004
Detailed Description (continued)
Applying an external clock with a duty cycle between 30% and 70% at the SYNC pin forces the converter to
operate at the applied clock frequency. The external frequency has to be in the range of about
±
20% of the
nominal internal frequency. Detailed values are shown in the electrical characteristic section of the data sheet.
The battery voltage, at which the detection circuit switches, can be programmed with a resistive divider
connected to the LBI pin. The resistive divider scales down the battery voltage to a voltage level of 500 mV,
which is then compared to the LBI threshold voltage. The LBI pin has a built-in hysteresis of 10 mV. See the
application section for more details about the programming of the LBI threshold. If the low-battery detection
circuit is not used, the LBI pin should be connected to GND (or to VBAT) and the LBO pin can be left
unconnected. Do not let the LBI pin float.
12
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS61031RSAR | 功能描述:直流/直流開關調節(jié)器 3.3-V Output 1-A Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61031RSARG4 | 功能描述:直流/直流開關調節(jié)器 3.3-V Output 1-A Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61032 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 4A SWITCH |
| TPS61032EVM-208 | 功能描述:電源管理IC開發(fā)工具 TPS61032-208 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 |
| TPS61032PWP | 功能描述:直流/直流開關調節(jié)器 5-V Output 1-A Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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