參數(shù)資料
型號(hào)： TPS40041DRBRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 7.2 A SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 3 X 3 MM, PLASTIC, SON-8
文件頁數(shù)： 2/38頁
文件大小： 741K
代理商： TPS40041DRBRG4
www.ti.com
APPLICATION INFORMATION
Functional Description
Voltage Reference
Voltage Error Amplifier
Loop Compensation
Oscillator
UVLO
SLUS700D – MARCH 2006 – REVISED DECEMBER 2007
The TPS40040 (300 kHz) and TPS40041 (600 kHz) are fixed-frequency voltage-mode synchronous buck
controllers. In operation, the synchronous rectifier (SR) is allowed to conduct current in both directions, allowing a
converter to operate in continuous mode, even under no load conditions, simplifying feedback loop compensation
requirements. During startup, internal circuitry modulates the switching of the synchronous rectifier to prevent
discharging of the output if a pre-biased condition exists.
The 600-mV bandgap reference voltage cell is internally connected to the non-inverting input of the error
amplifier. The voltage reference is trimmed with the error amplifier in a unity gain configuration to remove
amplifier offset from the final regulation voltage.
The error amplifier has a bandwidth of greater than 5 MHz, and open loop gain of at least 55 dB. The output
voltage swing is limited to just above and below the oscillator ramp levels to improve transient response.
Voltage mode buck type converters are typically compensated using Type III networks. Please refer to the
Design Example for detailed methodology in designing feedback loops for voltage mode converters.
The oscillator frequency is internally fixed. The TPS40040/1 operating frequencies are 300 kHz/600 kHz,
respectively.
When the input voltage is below the UVLO threshold, the TPS40040/1 turns off the internal oscillator and holds
all gate drive outputs in the low (OFF) state. When the input rises above the UVLO threshold, and the EN pin is
below the turn ON threshold, the start-up sequence is allowed to begin.
10
Copyright 2006–2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40040 TPS40041
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS40041DRBT 功能描述:DC/DC 開關(guān)控制器 Lo Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40041DRBTG4 功能描述:DC/DC 開關(guān)控制器 Lo Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40041EVM-001 功能描述:電源管理IC開發(fā)工具 5V Input 1.8V Output 6A Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS40042 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW PIN COUNT, LOW VIN (3.0 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH EXTERNAL REFERENCE INPUT
TPS40042DRCR 功能描述:DC/DC 開關(guān)控制器 Low Pin Ct Low Vin Synch Buck DCDC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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