AS3701 datasheet(53/110 Pages) AMSOSRAM

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[v1-11] 2016-Dec-14

AS3701 − Detailed Description – System Functions

800/1100mA Charger Input

With this function the charger input current limiter can be set

to 800mA or 1100mA.

The gpioX_mode [GPIOxcontrol] should be set to input.

The gpioX_iosf [GPIOxcontrol] should be set to 800/1100mA USB

current limit.

Charging Enable Input

When pulling the GPIO to high the charger is being enabled and

vice versa. This is to enable the charger without I²C

communication.

The gpioX_mode [GPIOxcontrol] should be set to input.

The gpioX_iosf [GPIOxcontrol] should be set to Charger enable

input.

Supervisor

The Step Down DCDC Converter has an integrated overcurrent

protection. An overtemperature protection of the chip is also

integrated which can be switched ON with the serial interface

signal temp_pmc_on [OvertemperatureControl] (enabled by

default; it is not recommended to disable the overtemperature

protection).

Temperature Supervision

The chip has two signals for the serial interface: ov_temp_110

and ov_temp_140 [OvertemperatureControl].

The flag ov_temp_110 is automatically reset if the

overtemperature condition is removed, whereas ov_temp_140

has to be reset by the serial interface with the signal rst_ov_

temp_140 [OvertemperatureControl]. If the flag ov_temp_140 is

set, an automatic reset of the complete chip is initiated. The

chip will only start-up when the temperature falls below the

T110 level (including hysteresis). The flag ov_temp_140 is not

affected by this reset cycle allowing the software to detect the

reason for this unexpected shutdown.

Figure 58:

Overtemperature Protection

Symbol

Parameter

Note

Min

Typ

Max

Unit

T110

ov_temp_110 rising

threshold

110

125

°C

T140

ov_temp_140 rising

threshold

125

140

155

°C

THYST

ov_temp_110 and

ov_temp_140 hysteresis

5°C

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