TPS65230

更新时间： 2024-11-16 07:04:51

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
26页	916K
描述
POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES

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TPS65230 数据手册

TPS65230, TPS65231

www.ti.com .................................................................................................................................... SLVSA10A–SEPTEMBER 2009–REVISED SEPTEMBER 2009

POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES

FEATURES

•

Supply Voltage Supervisor Circuit with Two

Monitor Inputs and Open Drain Output

Parallel I/O or I²C Control with User Selectable

Address

•

Wide Input Supply Voltage Range

(10.8 V - 22 V)

•

One Adjustable PWM Buck Controller

Advanced Fault Detection and Output Voltage

Adjustment Options in I²C Mode

–

10.8-V - 22-V Input Voltage Range

3.3-V - 6.1-V Output Voltage Range

500kHz switching frequency

Type III Compensation

Pull-Up Current Sources on Buck Enable Pins

for Accurate Start-Up Timing Control with

Preset Default

Programmable Current Limit

•

Over Current Protection on All Rails

•

Two Adjustable Step-Down Converter with

Integrated Switching FETs:

Thermal Shutdown to Protect Device During

Excessive Power Dissipation

–

4.75-V - 5.5-V Input

•

Thermally Enhanced Package for Efficient

Heat Management (48-pin HTSSOP)

0.9-V-3.3-V Output Voltage Range

3-A Output Current

APPLICATIONS

1-MHz Switching Frequency

Voltage Scaling Option

Type III Compensation

•

Digital Set Top Boxes

xDSL & Cable Modems

DVD Players

Home Gateway and Access Point Networks

Wireless Routers

•

Two 100-mΩ, 0.5-A (TPS65230) 1-A (TPS65231)

USB Switches with Over Current Protection

and Open-Drain Fault Pin

•

Early Supply Failure Flag (Open Drain Output)

is Set when Input Voltage Drops Below 9.3 V

Early Temperature Warning Flag (Open Drain

Output) is Set if Temperature Approaches

Shut-Down Threshold

DESCRIPTION/ORDERING INFORMATION

The TPS652x provides one PWM buck controller, two adjustable, synchronous buck regulators, two independent

USB power switches and a supply voltage supervisor (SVS) to provide main power functions for satellite set top

boxes, xDSL and cable modem applications operating off a single 12- to 22-V supply.

The SMPS have integrated switching FETs for optimized power efficiency and reduced external component

count. Each USB switch provides up to 0.5-A (TPS65230) or 1-A (TPS65231) of current as required by

downstream USB devices. All power blocks have thermal and over current/short circuit protection.

The SVS provides two inputs for monitoring positive supply rails. The active-low open-drain output remains low

for at least 180 ms after all supply rails rise above their rising edge threshold. Threshold value for VMON1 input

is set for monitoring a 3.3-V rail without the need for additional external components. Threshold for VMON2 input

is set to 0.8 V and requires resistor dividers on the input to monitor any positive voltage in the system. The

nBOR/nHOT open-drain output is pulled low if the input supply drops below 9.3 V or the chip temperature

approaches the thermal shutdown limit. This allows the system processor to save critical data and shut down

gracefully before the supply fails.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...26

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与TPS65230相关器件

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TPS65230A2DCA	TI	获取价格	POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
TPS65230A2DCAR	TI	获取价格	POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
TPS65230DCA	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48, HTSSOP-48
TPS65230DCAR	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO48, HTSSOP-48
TPS65231	TI	获取价格	POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
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TPS65231A2DCAR	TI	获取价格	POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
TPS65231DCAR	TI	获取价格	POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
TPS65231DCAT	TI	获取价格	POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
TPS65232	TI	获取价格	TRIPLE BUCK POWER MANAGEMENT IC

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