Product Info

Automotive Module Series
AG35 Hardware Design
AG35_Hardware_Design 43 / 129
3.6.3. Reference Design for Power Supply
Power design for the module is very important, as the performance of the module largely depends on the
power source. The power supply of AG35 should be able to provide sufficient current up to 2A at least. If
the voltage drop between the input and output is not too high, it is recommended to use an LDO to supply
power for the module. If there is a big voltage difference between the input source and the desired output
(VBAT), a buck converter is preferred to be used as the power supply.
The following figure shows a reference design for +12V/+24V input power source. The designed output
for the power supply is about 3.8V and the maximum rated current is 5A.
DC_IN
TPS54560-Q1
IN
SW
EN
FB
2
4
VBAT
100nF
47pF
243K
47nF
470uF
7.2uH
51K
1%
1%
4.7K
47K
VBAT_EN
BOOT
RT/CLK
COMP
GND
1
3
FB
FB
75K
20K
1%
PWRPD
9
5
6
7
8
16.9K
47uF
47uF 47uF
0.1uF
B560C
100uH
Figure 10: Reference Circuit of Power Supply
3.6.4. Monitor the Power Supply
AT+CBC command can be used to monitor the VBAT_BB voltage value. For more details, please refer to
document [2].
3.7. Turn on and off Scenarios
3.7.1. Turn on Module Using the PWRKEY
The following table shows the pin definition of PWRKEY.