The AS3608 is an ultra compact System PMU with integrated battery
charger and HV 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 AS3608. It features 3 DCDC converters as well
as 5 low noise LDOs. The different regulated supply voltages are
programmable via the serial control interface.
The step-up converter for the backlight can operate up to 30V. Both
constant voltage (OLED supply) as well as constant current (white
LED backlight) operations with 2 current sinks are possible. An
internal voltage protection is limiting the output voltage in the case of
external component failures.
AS3608 also contains a Li-Ion battery charger with constant current
and constant voltage. The maximum charging current is 1A. 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.
The single supply voltage may vary from 2.7V to 5.5V.
HV Backlight Driver
Step up for 30V backlight with internal transistor
Voltage control mode and over-voltage protection
2 programmable current sink (max. 38mA)
Max. 20mA@50V (with ext. transistor) or 500mA@5V
Possible external PWM dimming input
Battery Charger
Prog. trickle charging (25-265mA)
Prog. constant current charging (94-1060mA)
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
External battery switch control output
General
Battery and Temperature Supervisor
4 General Purpose IOs
10bit general purpose ADC input
PWM dimming input or wake-up input
Status output for: charger, low battery, power good and power-
up key
2 Key Features
Power Management
Voltage Generation
3 DCDC step down regulators
-
-
-
-
DVM (0.61V-3.3V, 1A@1.2V, 900mA@1.8V 800mA@2.5V)
50µA quiescent current
Selectable switching frequency (2 or 1MHz)
2A@1.2V with combined DCDC 2 & 3
OTP Programmable BOOT Sequence
Programmable regulator default voltages
Programmable start-up sequence
Applicable for LDO 1-4 and DCDC 1-3
Control Interface
I2C control lines, including watchdog
Power-Up input
Interrupt output
Bidirectional reset, with selectable delay
Low power standby mode, 180µA with LDO5 on
1 LDO low noise 2.7V (2.3-3.5V), 100mA
3 or 4 LDOs low noise
- 1.2-3.5V; 160/270mA
- 30µA quiescent current (low power mode)
Power supply supervision (LDO5)
4sec and 8sec emergency shut-down
Hibernation function
Power-On Reset Circuit
Packaging
QFN36 6x6mm, 0.5mm pitch
3 Application
The devices are ideal for Portable Media Players and Portable
Navigation Devices, e-Books, Tablet PCs, etc
www.austriamicrosystems.com
Revision 1.03
1 - 67
AS3608 2v2
Data Sheet - A p p l i c a t i o n
Figure 1. AS3608 Block Diagram
www.austriamicrosystems.com
Revision 1.03
2 - 67
AS3608 2v2
Data Sheet - C o n t e n t s
Contents
1 General Description ..................................................................................................................................................................
5 Absolute Maximum Ratings ......................................................................................................................................................
8 Detailed Description - Power Management Functions............................................................................................................
8.1 Low Drop Out Regulators ...................................................................................................................................................................
Voltage Feedback and OV Protection .......................................................................................................................................
Voltage Feedback......................................................................................................................................................................
Current Sinks .............................................................................................................................................................................
End of Charge Detection ........................................................................................................................................................... 22
VSUPSW and Temperature Supervision................................................................................................................................... 22
Battery Temperature Supervision .............................................................................................................................................. 22
No Battery Detection.................................................................................................................................................................. 22
Junction Temperature Supervision ............................................................................................................................................ 26
Power Rail Monitoring ................................................................................................................................................................ 26
本帖最后由 paulhyde 于 2014-9-15 08:56 编辑 1.2.2 Wireless
The WiFi settings are configured in the file /etc/config/wireless (currently supported on Broadcom, Atheros and mac8021 ......
AI分布式渲染架构提升手机渲染能力，游戏性能测试实时可查帧生成指标 中国上海，2025年8月20日——专业的图像和显示处理方案提供商 逐点半导体今日宣布，新发布的真我P4 5G、真我P4 Pro 5G智能手机搭载逐点半导体X7 Gen 2视觉处理器 。该处理器通过集成的分布式渲染解决方案，可降低GPU算力负担，大幅提升手机渲染能力。这也是海外中端市场同级产品中，首个集成专业视觉处理器的智能手...[详细]
编译自semiengineering 业界越来越关注人工智能的功耗问题，但这个问题并没有简单的解决方案。这需要深入了解应用、半导体和系统层面的软件和硬件架构，以及所有这些的设计和实现方式。每个环节都会影响总功耗和提供的效用。这是最终必须做出的权衡。 但首先，必须解决效用问题。电力是否被浪费了？“我们将电力用于有价值的用途，”Ansys（现为新思科技旗下公司）产品营销总监 Marc Swi...[详细]
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
