Deleted Adc Mode Section; Fault Detection Status; Low Vbat; Dc Current Limit - Analog Devices ADP1650 User Manual

Evaluation Board User Guide

FAULT DETECTION STATUS

Section 7 of the user registers window is used to read back the
fault detection status from the ADP1650. Click Read 0x05 to
view information about the fault. EN in Section 8 of the window
must be high (green) to be in read mode. An overvoltage fault
occurs when the output voltage is greater than 5.3 V (typical).
A timeout fault occurs when the STROBE button on the
evaluation board is pressed longer than the programmed
timeout duration in strobe level-sensitive mode. A thermal fault
occurs when the device junction temperature is greater than
150°C. A short-circuit fault occurs when the LED_OUT pin
remains grounded during startup. If the DC Current Limit
feature is enabled in Section 4 of the user registers window, and
the dc current programmed is exceeded, the input dc current
limit bit [IL_DC] is set and the DC-Current indicator in
Section 7 of the user registers window lights up.
The TxMask2/ILED bit is set depending on the mode of GPIO2
set in Section 3 of the window. If GPIO2 is set to Indicator
(ILED mode) and there is a fault with the ILED, the TxMask2/
ILED bit is set. If GPIO2 is set to TxMASK2 and a TxMaSK2
event occurs during a flash, the TxMask2/ILED bit is set high.
Faults that are indicated by lighted LEDs in Section 7 of the
user registers window are cleared after you click the Read 0x05
button.

LOW VBAT

Set the low VBAT threshold and the desired current setting in
Section 4 of the user registers window. The battery voltage can
be reduced during a flash event, which causes the flash current
to be reduced to the programmed level and the low battery
status bit to be set to indicate that the part has entered low
battery mode and the current is reduced.

DC CURRENT LIMIT

The dc current limit feature prevents the battery current from
exceeding the programmed level set in Section 4 of the user
registers window. Set DC-Current Limit to Enabled in Section 4,
and set the maximum current level using DC Current Limit.
During a flash event, if the DC current limit is reached, the DC
current limit status bit is set in the fault register. Click the Read
0x05 button at the bottom right of the user registers window to
check the status after a flash event. The flash current shown in
Section 2 of the window is updated with the actual current into
the LED during the flash event. For example, the user may
program 1.5 A for the flash current but the Flash Current bar
shows 1.3 A at the end of the Flash event. 1.3 A is the actual
current delivered to the LED. Bits I_FL in Register 0x03 are
automatically read back during a flash event to update the user
registers window.
Rev. A | Page 7 of 16
UG-139