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參數(shù)資料
| 型號(hào)： | TPS61071DDCT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.7 A BATTERY CHARGE CONTROLLER, 1440 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | PLASTIC, TSOT-23, 6 PIN |
| 文件頁數(shù)： | 5/23頁 |
| 文件大?。?/td> | 653K |
| 代理商： | TPS61071DDCT |
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V
-OutputVoltage-V
O
PrechargeCurrent-
A
VBAT=1.2V
VBAT=1.8V
VBAT=2.4V
VBAT=3.6V
VBAT=5V
Power-Save Mode
www.ti.com .......................................................................................................................................................... SLVS510C – JULY 2006 – REVISED MARCH 2009
Figure 22. Precharge and Short-Circuit Current
After charging the output capacitor to the input voltage, the device starts switching. If the input voltage is below
1.8 V, the device works with a fixed duty cycle of 70% until the output voltage reaches 1.8 V. After that the duty
cycle is set depending on the input output voltage ratio. Until the output voltage reaches its nominal value, the
boost switch current limit is set to 50% of its nominal value to avoid high peak currents at the battery during
start-up. As soon as the output voltage is reached, the regulator takes control, and the switch current limit is set
back to 100%.
The TPS61070 and TPS61073 are capable of operating in two different modes. At light loads, when the inductor
current becomes zero, they automatically enter the power-save mode to improve efficiency. In the power-save
mode, the converters only operate when the output voltage trips below a set threshold voltage. It ramps up the
output voltage with one or several pulses and returns to the power-save mode once the output voltage exceeds
the set threshold voltage. If output power demand increases and the inductor current no longer goes below zero,
the device again enters the fixed PWM mode. In this mode, there is no difference between the PWM only
versions TPS61071 and TPS61072 and the power-save mode enabled versions TPS61070 and TPS61073.
Copyright 2006–2009, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
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| TPS61071-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH |
| TPS61071TDDCRQ1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 AC Adj,600mA Sw,90% Eff PWM Boost Cnvrtr RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| TPS61072 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH |
| TPS61072DDC | 制造商:TI 制造商全稱:Texas Instruments 功能描述:90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH |
| TPS61072DDCR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 PFM/PWM Boost Conveter 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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