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CC3220MODA: Schematic review

Muthu S
Intellectual 720 points
Part Number: CC3220MODA
Other Parts Discussed in Thread: CC3220MOD, LMR14030

Hi ,

Our customer have done new product using CC3220MODSF12MOBR module, Attached is the hardware schematics of Konnect-Wi_2V0 product.

 

Kindly review the same and give your valuable feedback to improve the design.

Regards,

Muthu S

7103.Konnect-Wi-CRE0023_2V0_Schematic_rev1.0.pdf

  • 0
    TI__Mastermind 46271 points

    Hey Muthu,

    I can definitely assist you with this. I'll provide feedback within 3 or 4 days.

    Thanks,
    Seong

  • 0
    TI__Mastermind 46271 points

    Muthu,

    Moving forward, please direct your customers to our Hardware Design Checklist. Once this is completed, the schematic can be shared with us together. For example, if a customer requires a schematic review for the CC3220MOD, they can refer to the checklist's "CC3220MODx & CC3220MODAx" tab and run through the list to ensure their device is configured correctly. If they had any concerns/questions, they could utilize columns G and H and share this with their schematic. Please see my feedback below and note that I will be unable to comment on non-TI parts.

    1. It looks like a series diode D10 is used for reverse current/battery protection. Using a MOSFET is more ideal. See our reverse battery protection appnote here.
    2. Ensure that the external components selected for the LMR14030 are the right values by referring to the datasheet.
    3. Is R7, R11, and R17 DNP? Make sure the Opamp is not bypassed when the ADC is used (1.8-V absolute, 1.46-V full scale).
    4. C18 or R35 must be DNP to route the RF signal to either the Ufl or antenna
    5. There is an RC circuit internal to the module and connected to the reset pins - specifically a 100k resistor tied from pin 35 to pin 36 and a 10nF capacitor connected to this 100k resistor and tied to GND. With that said, R32 can be saved by tying pin 36 directly to VBAT. The customer should refer to our LaunchPad reference design here. 
    6. We recommend that the customer adds 100k pull ups to all UART lines.

    BR,

    Seong

  • 0 in reply to Seong Kim
    Intellectual 720 points

    Hi Seong,

    Thanks for sharing the feedback review on the schematic..
    Please refer the comments below...

    1. It looks like a series diode D10 is used for reverse current/battery protection. Using a MOSFET is more ideal.
    See our reverse battery protection app note here. http://www.ti.com/lit/an/slva139/slva139.pdf
    Comments : Suggested FET has VDS 20 max, But in our application, there is chance of connecting supply higher than 20V also,
    request you to share the PMOS with VDS-40V and current can be 3A.

    2. Ensure that the external components selected for the LMR14030 are the right values by referring to the datasheet http://www.ti.com/lit/ds/symlink/lmr14030.pdf
    Comments : Yes I have verified.

    3. Is R7, R11, and R17 DNP? Make sure the Op amp is not bypassed when the ADC is used (1.8-V absolute, 1.46-V full scale).
    Comments : Yes Understood.

    4. C18 or R35 must be DNP to route the RF signal to either the Ufl or antenna.
    Comments : Yes Understood.

    5. There is an RC circuit internal to the module and connected to the reset pins - specifically a 100k resistor tied from pin 35 to pin 36 and a 10nF capacitor connected to this 100k resistor and tied to GND. With that said, R32 can be saved by tying pin 36 directly to VBAT.
    Comments : Will update this in the design.

    6. We recommend that add 100k pull ups to all UART lines.
    Comments : Will update this in the design.

    We have attached Hardware Design checklist. If requires a schematic review for the CC3220MOD, you can refer to the checklist's "CC3220MODx & CC3220MODAx" tab and run through the list to ensure their device is configured correctly. If you have any concerns/questions, you can utilize columns G and H and share this with schematic.
    Comments : Yes I have taken all the configuration data's and verified.

    Regards,
    Muthu S

    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
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                          TI__Mastermind
                        46271 points
                      
    
                          
                   		
		
    
					
    Muthu,
    

    You can use our search engines to look for a MOSFET that fits into your design here.
    

    BR,
    

    Seong
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                 	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
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                          Guru
                        39650 points
                      
    
                          
                   		
		
    
					
    Hi Muthu,
     
     Yon can use trick with Zener diode to solve issue with low VGS - www.youtube.com/watch
     
     Jan
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
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