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| 型號： | TPS40090QPWRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 21/23頁 |
| 文件大小： | 309K |
| 代理商： | TPS40090QPWRQ1 |
SLUS845C
– JUNE 2008 – REVISED MAY 2011
APPLICATION INFORMATION
Functional Description
The TPS40090 is a multiphase, synchronous, peak current mode, buck controller. The controller uses external
gate drivers to operate N-channel power MOSFETs. The controller can be configured to operate in a two-, three-,
or four-phase power supply.
The controller accepts current feedback signals from either current sense resistors placed in series with the filter
inductors or current proportional signals derived from the inductors' DCR.
Other features include an LDO regulator with UVLO to provide single voltage operation, a differential input
amplifier for precise output regulation, user programmable operation frequency for design flexibility, external
synchronization capability, programmable pulse-by-pulse overcurrent protection, output overvoltage protection,
and output undervoltage shutdown.
Differential Amplifier
The unity gain differential amplifier with high bandwidth allows improved regulation at a user-defined point and
eases layout constraints. The output voltage is sensed between the VOUT and GNDS pins. The output voltage
programming divider is connected to the output of the amplifier (DIFFO). The differential amplifier can be used
only for output voltages lower then 3.3 V.
If there is no need for a differential amplifier, or if the output voltage required is higher than 3.3 V, the differential
amplifier can be disabled by connecting the GNDS pin to the BP5 pin. The voltage programming divider in this
case should be connected directly to the output of the converter.
Current Sensing and Balancing
The controller employs a peak current-mode control scheme, which naturally provides a certain degree of current
balancing. With current mode, the level of current feedback should comply with certain guidelines depending on
duty factor, known as slope compensation to avoid subharmonic instability. This requirement can prohibit
achieving a higher degree of phase current balance. To avoid the controversy, a separate current loop that
forces phase currents to match is added to the proprietary control scheme. This effectively provides high degree
of current sharing independently of properties of controller's small signal response.
High-bandwidth current amplifiers can accept as an input voltage either voltage drop across dedicated precise
current-sense resistors, or inductor's DCR voltage derived by an R-C network, or thermally compensated voltage
derived from the inductor's DCR. The wide range of current-sense settings eases the cost and complexity
constraints and provides performance superior to those found in controllers using low-side MOSFET current
sensing.
Copyright
2008–2011, Texas Instruments Incorporated
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40090RHDR | 功能描述:DC/DC 開關(guān)控制器 4 Ch Multiph Buck DC/DC Controller 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 |
| TPS40090RHDRG4 | 功能描述:DC/DC 開關(guān)控制器 4Ch Multiphase 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 |
| TPS40090RHDT | 功能描述:DC/DC 開關(guān)控制器 4Ch Multiphase 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 |
| TPS40090RHDTG4 | 功能描述:DC/DC 開關(guān)控制器 4Ch Multiphase 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 |
| TPS40091 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH FREQUENCY MULTIPHASE CONTROLLER |
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