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參數(shù)資料
| 型號(hào)： | TPS61001 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Low Input Voltage Boost Converter with Fixed 1.5V Output |
| 中文描述： | 具有固定 1.5V 輸出的低輸入電壓升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 5/22頁 |
| 文件大小： | 389K |
| 代理商： | TPS61001 |
TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006
SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
SLVS279A – MARCH 2000 – REVISED MAY 2000
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
low Battery detector circuit (LBI and 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 LBO pin goes active low when
the voltage on the LBI pin decreases below the set threshold voltage of 500 mV
±
15 mV, which is equal to the
internal reference voltage. 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 build-in hysteresis of
10 mV. Please 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 V
BAT
) and the LBO
pin can be left unconnected. Do not let the LBI pin float.
low-EMI switch
The device integrates a circuit which removes the ringing that typically appears on the SW-node when the con-
verter enters the discontinuous current mode. In this case, the current through the inductor ramps to zero and
the Schottky diode stops conducting. Due to remaining energy that is stored in parasitic components of diode,
inductor and switch, a ringing on the SW pin is induced. The integrated anti-ringing switch clamps this voltage
internally to V
BAT
and therefore dampens this ringing.
The anti-ringing switch is turned on by a comparator that monitors the voltage between SW and V
OUT
. This
voltage indicates when the diode is reverse biased. The ringing on the SW-node is damped to a large degree,
reducing the electromagnetic interference generated by the switching regulator to a very great extends.
adjustable output voltage
The accuracy of the internal voltage reference, the controller topology, and the accuracy of the external resistor
divider determine the accuracy of the adjustable output voltage version of the TPS61000. The reference voltage
has an accuracy of
±
4% over line, load, and temperature. The controller switches between fixed frequency and
pulse-skip mode, depending on load current. This adds an offset to the output voltage that is equivalent to 1%
of V
O
. Using 1% accurate resistors for the feedback divider, a total accuracy of
±
6% can be achieved over the
complete output current range.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61001DGS | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.5V 100mA Boost 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS61001DGSG4 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Lo-In Voltage Boost 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS61001DGSR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Lo-In Voltage Boost 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS61001DGSRG4 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Lo-In Voltage Boost 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS61002 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD |
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