AT73C246 [ATMEL]

Power Supply Support Circuit, Fixed, 6 Channel, 7.50 X 7.50 MM, 0.90 MM HEIGHT, GREEN, MO-220, QFN-64;


型号：	AT73C246
厂家：	ATMEL
描述：	Power Supply Support Circuit, Fixed, 6 Channel, 7.50 X 7.50 MM, 0.90 MM HEIGHT, GREEN, MO-220, QFN-64
文件：	总2页 (文件大小：5243K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Power Management and Analog Companions (PMAAC)

ꢀ AT73C246

Power Management Unit and Stereo Audio Codec

Multimedia systems such as portable media players are typically built around a microcontroller, memories,

wireless communications ICs and audio input/output devices. The keys to their success are their audio

quality and their power efficiency.

Atmel’s AT73C246 is the ideal power management unit and stereo audio interface for such systems. It

integrates, in a single device, a high-quality audio codec and multiple power supplies that are precisely

adapted to the requirements of an MCU-based multimedia system. In particular, the AT73C246 is designed

to interface directly to Atmel’s AT91SAM9 and AT91CAP9 families of ARM9™- based microcontrollers and

their DDR2 memories.

The AT73C246 reduces the system chip count by replacing a number of discrete voltage regulators.

Operating from a single 2.9V to 5.5V power supply, it provides precisely calibrated voltages to all the other

components of the system, and enables these components to be powered down selectively when not

required. This keeps system power consumption to a minimum under all conditions of use.

The AT73C246 also provides high quality audio. It multiplexes the stereo inputs from two microphones, a

line in and an auxiliary input, and provides stereo output for headphones or an external speaker amplifier.

The audio inputs can be channeled directly to the output or digitized and transferred to the MCU for

recording or processing. In playback mode, digital signals originating from the MCU are converted to

high-fidelity analog for output.

By its high level of integration, precisely calibrated power supplies, configurable power management and

high-quality audio, the AT73C246 reduces the cost, board space and power consumption of a wide range

of multimedia applications while enhancing the sound quality.

ATMEL PRODUCT

Rechargeable

2.9V - 5.5V

Backup Battery

VBackup LDO 2.5V

DDR2 Memory

Aux In

DC/DC 1.8V/600mA

FM Receiver

AT73C246

POWER

Control: TWI

Digital Audio: I²S

Line In

MICROCONTROLLER

e.g. SAM7, SAM9

Reset

MANAGEMENT

UNIT

DC/DC 1.2V/600mA

LDO 1V/300mA

LDO 3.3V/200mA

2 x Mic In

Line Out

Core

CAP9, AVR32

Core

STEREO

Input/Output

AUDIO CODEC

Headset

BlueTooth

WiFi

Wakeup

AT73C246 Application Example

ꢀ AT73C246

Power Management Unit and Stereo Audio Codec

Headquarters

DDR2

Memory

VDD0

MCU Core

MCU I/O & RF IC

Backup

Battery

VBACKUP

VDD1

VDD2

VDD3

VDD4

Atmel Corporation

2325 Orchard Parkway

San Jose, CA 95131, USA

Tel.: (+1) (408) 441 0311

Fax: (+1) (408) 487 2600

DCDC0

0.8V-3.6V

600mA

DCDC1

0.8V-3.6V

600mA

LDO2

0.8V-1.9V

300mA

LDO3

2.7V-3.6V

200mA

LDO4

2.7V-3.6V

200mA

LDO5

BACKUP

2.5V

Power

International

Wakeup

Reset

Interrupt

Auxiliary

Analog

Input

Auxiliary

ADC

Atmel Asia

Unit 1-5 & 16,

Supply

Monitor

Power Fail

Detector

References

Real Time

19/F BEA Tower

Millennium City 5

418 Kwun Tong Road

Kwun Tong, Kowloon

Hong Kong

Clock

Power Management Unit

Clock

Two

Wire

Interface

Over

Temperature

Detector

State

Machine

Reset

Generator

Control

Crystal OSC

32kHz

Crystal

Tel.: (852) 2245 6100

Fax: (852) 2722 1369

Bypass

Mux

Sidetone

Line

Atmel Europe

Speaker/

Le Krebs

8, rue Jean-Pierre Timbaud

B.P. 309

78054 Saint-Quentin-en-Yvelines

Cedex, France

Tel.: (33) 1 30 60 70 00

Fax: (33) 1 30 60 71 11

ADC

DAC

Headset L

Mic1

Mic2

Speaker/

Headset R

DAC

Sidetone

Bypass

Mux

Aux

Atmel Japan

9F, Tonetsu Shinkawa Bldg.

1-24-8 Shinkawa

Chuo-ku, Tokyo 104-0033

Japan

I²S

Stereo Audio Codec

Tel.: (81) 3 3523 3551

Fax: (81) 3 3523 7581

Digital Audio

In/Out

Product Contacts

The audio input of the AT73C246 is built around a stereo ADC with a 96dB dynamic range. It multiplexes/mixes

the inputs required by the majority of multimedia systems: two stereo microphones, an auxiliary input from, for

example, a FM receiver, and a line in from, for example, a digital media player. The audio input can be passed

directly to the stereo output if required, in bypass or sidetone mode that significantly reduces power consumption.

Otherwise the audio stream is digitized and transferred to the MCU via the industry-standard I²S bus.

Digital sound output is transferred from the MCU via the I²S bus before passing through a 100dB dynamic

range stereo DAC and output amplifiers that can directly drive a 60mW 16/32Ohm headset, or feed the input

of a stereo speaker amplifier. These highly integrated audio features offer unsurpassed sound quality.

Technical Support

www.atmel.com/products/

powermanage

Sales Contacts

www.atmel.com/contacts

Web Site

www.atmel.com

The PMU of the AT73C246 is built around a dedicated set of voltage regulators, each configurable in 50mV

steps to provide precisely the voltage, current and noise immunity required by the MCU core and its I/Os, and

also the memory and RF/analog sections in the multimedia system. Each supply channel features fast and

accurate transient load responses, automatic ramping (digital voltage scaling), output voltage monitoring, and

over-current protection. Through its TWI bus control, the AT73C246 offers

numerous possibilities for power optimization. In addition to individual

function shutdown, it saves power with a fully programmable

standby and wake-up scenario where the application

can be partially or fully powered down.

and combinations thereof, and others

are registered trademarks or trademarks

of Atmel Corporation or its subsidiaries.

ARM^®and others are registered

trademarks or trademarks of ARM Ltd.

Other terms and product names may

be trademarks of others.

To further reduce the bill-of-materials and space

requirements of the multimedia system, the AT73C246

also integrates a real-time-clock generator and a set of

auxiliary analog inputs that drive a 10-bit ADC for sensing and

measurement functions. Finally, the AT73C246 is delivered

in a compact 7.5x7.5mm QFN package that saves more than

Rev.: 11058A-PMAAC-04/10/2M

30% of board space over alternative solutions.

AT73C246 Board

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products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.

AT73C246 [ATMEL]

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