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| 型號： | TPS61026DRCRG4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER |
| 中文描述： | 96％高效同步升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 14/27頁 |
| 文件大?。?/td> | 498K |
| 代理商： | TPS61026DRCRG4 |
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Low Battery Detector Circuit—LBI/LBO
Low-EMI Switch
TPS61020
,
TPS61024
,
TPS61025
TPS61026, TPS61027, TPS61028
TPS61029
SLVS451D–SEPTEMBER 2003–REVISED FEBRUARY 2006
DETAILED DESCRIPTION (continued)
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.
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.
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61026DRCT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.0-V Otp 1.8-A Swit Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61026DRCTG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.0-V Otp 1.8-A Swit Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61027 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH |
| TPS61027DRC | 制造商:TI 制造商全稱:Texas Instruments 功能描述:96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH |
| TPS61027DRCR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5-V Otp 1.5-A Swit Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)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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