austriamicrosystems 990600223 Handbuch

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AS3606/7

Preliminary Application Note - Confidential

AS3606/7 – AN01 - Evalboard

System PMU with HV Back Light Driver

1 General Description

The AS3606/07 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 AS3606/07.

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 26V. 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.

AS3606/07 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.

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