TPS40195

現行

具電源良好輸出和同步功能的 4.5-V 至 20-V,20-A 同步降壓控制器

產品詳細資料

Vin (min) (V) 4.5 Vin (max) (V) 20 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.591 Vout (max) (V) 17 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification Iq (typ) (µA) 4000 Duty cycle (max) (%) 85 Number of phases 1
Vin (min) (V) 4.5 Vin (max) (V) 20 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.591 Vout (max) (V) 17 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification Iq (typ) (µA) 4000 Duty cycle (max) (%) 85 Number of phases 1
TSSOP (PW) 16 32 mm² 5 x 6.4 VQFN (RGY) 16 14 mm² 4 x 3.5
  • Input Operating Voltage Range: 4.5 V to 20 V
  • Output Voltage as Low as 0.591 V ±0.5%
  • 180° Bi-Directional Out-of-Phase Synchronization
  • Internal 5-V Regulator
  • High and Low MOSFET Sense Overcurrent
  • 100-kHz to 600-kHz Switching Frequency
  • Enable and Power Good
  • Programmable UVLO and Hysteresis
  • Thermal Shutdown at 150°C
  • Selectable Soft Start
  • Prebias Output Safe
  • Input Operating Voltage Range: 4.5 V to 20 V
  • Output Voltage as Low as 0.591 V ±0.5%
  • 180° Bi-Directional Out-of-Phase Synchronization
  • Internal 5-V Regulator
  • High and Low MOSFET Sense Overcurrent
  • 100-kHz to 600-kHz Switching Frequency
  • Enable and Power Good
  • Programmable UVLO and Hysteresis
  • Thermal Shutdown at 150°C
  • Selectable Soft Start
  • Prebias Output Safe

The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.

The threshold is set with a single external resistor connected from ILIM to GND. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault. Synchronization on this device is bi-directional. Devices can be synchronized 180° out of phase to a chosen master TPS40195 running at a fixed 250 kHz or 500 kHz, or can be synchronized to an outside clock source anywhere in the 100 kHz to 600 kHz range.

The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.

The threshold is set with a single external resistor connected from ILIM to GND. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault. Synchronization on this device is bi-directional. Devices can be synchronized 180° out of phase to a chosen master TPS40195 running at a fixed 250 kHz or 500 kHz, or can be synchronized to an outside clock source anywhere in the 100 kHz to 600 kHz range.

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類型 標題 日期
* Data sheet TPS40195 4.5-V to 20-V Synchronous Buck Controller With Synchronization and Power Good datasheet (Rev. F) PDF | HTML 2019年 6月 7日
User guide TPS40195 Buck Controller Evaluation Module User's Guide (Rev. B) PDF | HTML 2022年 1月 10日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Enabling Multiple TPS4019x Devices 2012年 3月 29日
More literature TPS40195RGY Test Report 2008年 2月 15日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS40195EVM-001 — TPS40195 20V 輸入、3.3V 輸出、20A 評估模組

The TPS40195EVM evaluation module (EVM) is a synchronous buck converter providing a fixed 3.3V output at up to 20A from a 12V input bus. The EVM is designed to start up from a single supply, so no additional bias voltage is required for start up. The module uses the TPS40195 Mid-Voltage (...)
使用指南: PDF | HTML
TI.com 無法提供
模擬型號

TPS40195 TINA-TI Average Reference Design

SLVM017.ZIP (314 KB) - TINA-TI Reference Design
模擬型號

TPS40195 TINA-TI Average Spice Model

SLVM019.ZIP (3 KB) - TINA-TI Spice Model
模擬型號

TPS40195 TINA-TI Transient Reference Design (Rev. B)

SLVC182B.ZIP (331 KB) - TINA-TI Reference Design
模擬型號

TPS40195 TINA-TI Transient Spice Model

SLVM018.ZIP (22 KB) - TINA-TI Spice Model
計算工具

SLUC263 Type III Compensation Calculation Tool

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支援產品和硬體

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (PW) 16 Ultra Librarian
VQFN (RGY) 16 Ultra Librarian

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