參數(shù)資料
型號(hào)： TPS65166RHAR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC40
封裝： 6 X 6 MM, GREEN, PLASTIC, M0-220VJJD-2, QFN-40
文件頁(yè)數(shù)： 16/45頁(yè)
文件大?。?/td> 3690K
代理商： TPS65166RHAR
Buck Converter
SW3
VIN1
Control
Logic
FB2
Current
Comparator
Error
Amplifier
N-MOS
SW4
VIN2
D
S
CurrentSampling
&
SlopeCompenation
1.24 V
+ 15%
Overvoltage
Comparator
750 kHz
Oscillator
Logic
Clock / 2
Clock / 4
Clock
Clockselectionforshortcircuit
andSoftstart
0.8 V
0.4 V
CurrentLimit
&
Softstart
Soft-Start (Buck Converter)
Buck Converter Design Procedure
www.ti.com.......................................................................................................................................................................................... SLVS976 – SEPTEMBER 2009
The non-synchronous current mode buck converter operates at fixed frequency PWM operation. The converter
drives an internal N-channel MOSFET switch with an internal bootstrap capacitor. The output voltage can be set
between 2.5V and 3.3V by an external feedback divider. If the feedback voltage FB2 is 15% above the reference
voltage of 1.24V the converter stops switching and starts switching again if the FB2 voltage falls below the
threshold. For 3.3V output voltage the overvoltage lockout is approximately 3.8 V.
Figure 26. Buck Converter Block Diagram
To avoid high inrush current during start-up, an internal soft-start is implemented. When the buck converter is
enabled, its current limit is reduced and it slowly rises (1ms to 2ms) to the switch current limit. For further inrush
current limitation, the switching frequency is reduced to 1/4 of the switching frequency fs until the feedback
voltage FB2 reaches 0.4V, then the switching frequency is set to 1/2 of fs until FB2 reaches 0.8V when the full
switching frequency fs (750kHz) is applied. See the internal Block diagram (Figure 26) for further explanation.
The soft-start is typically completed in 1ms to 2ms.
The first step in the design procedure is to verify whether the maximum possible output current of the buck
converter supports the specific application requirements. To simplify the calculation, the fastest approach is to
estimate the converter efficiency by taking the efficiency numbers from the provided efficiency curves or to use a
worst case assumption for the expected efficiency, e.g., 80%. The calculation must be for the maximum assumed
input voltage where the peak switch current is the highest. The inductor and external Schottky diode have to be
able to handle this current.
Copyright 2009, Texas Instruments Incorporated
23
Product Folder Link(s): TPS65166
相關(guān)PDF資料
PDF描述
TPS65270RGET DUAL SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PQCC24
TPS65562RGTTG4 3 A BATTERY CHARGE CONTROLLER, PQCC16
TPS65735RSNR SPECIALTY ANALOG CIRCUIT, PQCC32
TPS70702PWP DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS
TPS70745PWP DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65167ARHAR 功能描述:其他電源管理 Compact LCD Bias Sply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
TPS65167ARHARG4 功能描述:其他電源管理 Compact LCD Bias Sply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
TPS65167EVM-277 功能描述:電源管理IC開(kāi)發(fā)工具 TPS65167 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS65167RHAR 功能描述:其他電源管理 Compact LCD Bias Supply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
TPS65167RHARG4 功能描述:LCD 驅(qū)動(dòng)器 12V/3.5A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*