AS3710-BQFP

AS3710-BQFP Datasheet

AS3710

Part	Datasheet
AS3710-BQFP	AS3710-BQFP (pdf)

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AS3710 High Current Power Management Unit for Portable Devices 1 General Description The AS3710 is a compact System PMU with integrated battery charger and back light driver. The device offers advanced power management functions. 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 programmable via the serial control interface. 4MHz operation 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 possible. 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 battery charger with constant current and constant voltage. The maximum charging current is 1.5A. An integrated battery switch and an optional external switch are separating the battery during charging or whenever an external power supply is present. With this switch it is also possible to operate with no or deeply discharged batteries. A programmable current limit can be used to control the maximum current used from a USB supply. Additional features are a 30V OV protection and battery temperature supervision. The single supply voltage may vary from 2.7V to 5.5V. 2 Key Features Power Management Voltage Generation 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 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 ultra low power always on LDO 2.5V, 10mA supply supervision and 8sec emergency shut-down function HV Backlight Driver step up with external transistor control mode and over-voltage protection programmable current sinks max. 40mA external PWM dimming input DLS, CABC Battery Charger trickle charging 25-220mA constant current charging up to 1500mA constant voltage charging 3.9V-4.25V time-out and temperature supervision current limitation for USB mode battery switch & ideal diode linear mode battery switch control switching mode 30V OV protection General Supervisor battery monitoring with interrupt genera- tion and selectable warning level temperature monitoring with interrupt generation and selectable warning and shutdown levels Real Time Clock low power 32kHz oscillator and minute counter, auto wake-up alarm seconds or minutes clock output to peripheral total power consumption 4 General Purpose IOs general purpose ADC input and DVM input DLS, CABAC dimming input output for charger, low battery, power good and step-up overcurrent clock output feedback input AS3710 OTP programmable BOOT Sequence regulator default voltages start-up sequence General Purpose ADC resolution internal / external sources - VUSB, VSUP, CHGIN, VBAT - GPIOx, CURRx - XOUT32K, SENSEN_SU1 - chip temperature Figure AS3710 Block Diagram Control Interface control lines, including watchdog input reset, with selectable delay 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 AS3710 Product Brief - Key Features Copyright Copyright austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer

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AS3710

High Current Power Management Unit for Portable Devices
1 General Description

The AS3710 is a compact System PMU with integrated battery charger and back light driver.

The device offers advanced power management functions. 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 programmable via the serial control interface. 4MHz operation 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 possible. 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 battery charger with constant current and constant voltage. The maximum charging current is 1.5A. An integrated battery switch and an optional external switch are separating the battery during charging or whenever an external power supply is present. With this switch it is also possible to operate with no or deeply discharged batteries. A programmable current limit can be used to control the maximum current used from a USB supply. Additional features are a 30V OV protection and battery temperature supervision.

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

Power Management

Voltage Generation 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
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
ultra low power always on LDO 2.5V, 10mA
supply supervision
and 8sec emergency shut-down
function

HV Backlight Driver step up with external transistor control mode and over-voltage protection programmable current sinks max. 40mA external PWM dimming input DLS, CABC

Battery Charger trickle charging 25-220mA constant current charging up to 1500mA constant voltage charging 3.9V-4.25V time-out and temperature supervision current limitation for USB mode battery switch & ideal diode linear mode battery switch control switching mode 30V OV protection

General

Supervisor battery monitoring with interrupt genera-
tion and selectable warning level temperature monitoring with interrupt
generation and selectable warning and shutdown levels

Real Time Clock low power 32kHz oscillator and minute counter, auto wake-up alarm seconds or minutes clock output to peripheral total power consumption
4 General Purpose IOs general purpose ADC input and DVM input DLS, CABAC dimming input output for charger, low battery, power good
and step-up overcurrent clock output feedback input

AS3710

OTP programmable BOOT Sequence regulator default voltages start-up sequence General Purpose ADC resolution internal / external sources
- VUSB, VSUP, CHGIN, VBAT - GPIOx, CURRx - XOUT32K, SENSEN_SU1 - chip temperature

Figure AS3710 Block Diagram

Control Interface control lines, including watchdog input reset, with selectable delay 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

AS3710

Product Brief - Key Features

Copyright

Copyright austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

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Datasheet ID: AS3710-BQFP 519712