AS3710-BQFP Datasheet AS3710-BQFP | P1-P3

AS3710

High Current Power Management Unit for Portable Devices

Product Brief

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1 General Description

The AS3710 is a compact System PMU with integrated

battery charger and back light driver.

The device offers advanced power management func-

tions. All necessary ICs and peripherals in a battery

powered mobile device are supplied by the AS3710. It

features 3 DCDC buck converters as well as 8 low noise

LDOs. The different regulated supply voltages are pro-

grammable via the serial control interface. 4MHz opera-

tion with 1uH coils are reducing cost and PCB space.

The three step-up converter generate voltages for

e.g.the backlight, classD amplifier, USB host support or

LCD display supply. Both constant voltage (for e.g.

OLED supply) as well as constant current (white LED

backlight) operations with three current sinks are possi-

ble. An internal voltage protection is limiting the output

voltage in the case of external component failures.

AS3710 contains a linear or switching mode Li-Ion bat-

tery charger with constant current and constant voltage.

The maximum charging current is 1.5A. An integrated

battery switch and an optional external switch are sepa-

rating the battery during charging or whenever an exter-

nal power supply is present. With this switch it is also

possible to operate with no or deeply discharged batter-

ies. A programmable current limit can be used to control

the maximum current used from a USB supply. Addi-

tional features are a 30V OV protection and battery tem-

perature supervision.

The single supply voltage may vary from 2.7V to 5.5V.

2 Key Features

Power Management

Voltage Generation

3 DCDC step down regulators

- DVM (0.6V-3.3V;1x 1.2-1.5A, 2x 0.7-1A)

- 50uA quiescent current

- selectable switching frequency (2, 3 or 4MHz)

- 2A with combined DCDC 2 & 3

2 analog low noise LDOs, 6 digital LDOs

- 2x 1.2-3-3V, 6x 0.9-3.3V; 150-300mA

- 30uA quiescent current (low power mode)

1 ultra low power always on LDO 2.5V, 10mA

power supply supervision

4sec and 8sec emergency shut-down

stand-by function

HV Backlight Driver

3x step up with external transistor

voltage control mode and over-voltage protection

3 programmable current sinks (max. 40mA)

e.g. 500mA@5V; 40mA@50V

possible external PWM dimming input (DLS, CABC)

Battery Charger

prog. trickle charging (25-220mA)

prog. constant current charging (up to 1500mA)

prog. constant voltage charging (3.9V-4.25V)

charger time-out and temperature supervision

selectable current limitation for USB mode

integrated battery switch & ideal diode (linear mode)

external battery switch control (switching mode)

external 30V OV protection

General

Supervisor

automatic battery monitoring with interrupt genera-

tion and selectable warning level

automatic temperature monitoring with interrupt

generation and selectable warning and shutdown

levels

Real Time Clock

ultra low power 32kHz oscillator

sec and minute counter, auto wake-up

selectable alarm (seconds or minutes)

32kHz clock output to peripheral

<1uA total power consumption

4 General Purpose IOs

10bit general purpose ADC input

wake-up/sleep and DVM input

PWM (DLS, CABAC) dimming input

status output for: charger, low battery, power good

and step-up overcurrent

Q32k clock output

interrupt output

PWM output

step-up feedback input

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AS3710

Product Brief

OTP programmable BOOT Sequence

programmable regulator default voltages

programmable start-up sequence

General Purpose ADC

10bit resolution

several internal / external sources

- VUSB, VSUP, CHGIN, VBAT

- GPIOx, CURRx

- XOUT32K, SENSEN_SU1

- chip temperature

Figure 1. AS3710 Block Diagram

Control Interface

I2C control lines, including watchdog

Power-Up input

bidirectional reset, with selectable delay

ultra low power standby mode

Power-On Reset Circuit

Packaging

QFN56 7x7mm 0.4mm pitch

Application

Portable Media Players, Portable Navigation Devices,

E-Books, Mobile Internet Devices, Tablet PCs

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AS3710

Product Brief - Key Features

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the information set forth herein or regarding the freedom of the described devices from patent infringement. austria-

microsystems AG reserves the right to change specifications and prices at any time and without notice. Therefore,

prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current informa-

tion. This product is intended for use in normal commercial applications. Applications requiring extended temperature

range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-

sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for

each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard

production flow, such as test flow or test location.

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Contact Information

Headquarters

austriamicrosystems AG

A-8141 Schloss Premstaetten, Austria

Tel: +43 (0) 3136 500 0

Fax: +43 (0) 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:

http://www.austriamicrosystems.com/contact

P1-P3

AS3710-BQFP

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ams

Description:

Power Management Specialized - PMIC

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AS3710-BQFP