EES3 Hardware Interface Description
3.3 Power Up / Power Down Scenarios
71
EES3_HD_v01.100b
Page 39 of 118
2009-08-12
Confidential / Released
3.3.4.4
Overvoltage Shutdown
The overvoltage shutdown threshold is 100mV above the maximum supply voltage V
BATT+
specified in
.
When the supply voltage approaches the overvoltage shutdown threshold the module will send
the following URC:
^SBC: Overvoltage warning
This alert is sent once.
When the overvoltage shutdown threshold is exceeded the module will send the following URC
^SBC: Overvoltage shutdown
before it shuts down cleanly:
This type of URC does not need to be activated by the user. It will be output automatically when
fault conditions occur.
Keep in mind that several EES3 components are directly linked to BATT+ and, therefore, the
supply voltage remains applied at major parts of EES3, even if the module is switched off. Es-
pecially the power amplifier is very sensitive to high voltage and might even be destroyed.