User's Manual

Smart Machine Smart Decision
SIM5360A_User_Manual_V1.03 2014-07-03
51
AGPS mode needs more support from the mobile telecommunication network. Refer to AGPS
application document for details.
3.13 Multi-functional interface
SIM5360A merges functions for various applications. It can enrich users’ design and lower the cost of
users’ hardware.
3.13.1 Sink Current Source
The dedicated pin (ISINK) is intended for driving passive devices，such as LCD backlight, this
implementation is VBAT tolerant and suitable for driving white LEDs. The high-current driver can
maintain a constant current which is set by the AT command “AT+ CLEDITST”, capable of up to 40 mA.
Table 28: Electronic characteristic
Symbol Description Min Typ Max Unit
ISINK Input voltage 0.5 VDD VBAT V
I
O
Input current 5 - 40 mA
Since the driver is ground-referenced current sink, the operating device it drives must form a current path
between the VDD pin and the ISINK pin. The following figure is for users reference.
MODULE
ISINK
Pin 45 is VBAT tolerant-
suitable for driving white
LEDs
Current Controls
Passive
device
+
-
VBAT
High
current
Figure 37: Current drive
Note: The sinking current can be adjusted to meet design requirement through the AT command “AT+
CLEDITST =<0>, <value>”.The “value” ranges from 0 to 15,on behalf of the current changes from
0mA to 150mA in steps of 10mA.