Digital thermoelectric cooler controller - LT8722

Question

Hello i have several questions about LT8722 : 
 - Is this component can be daisy-chain? 
 - Can we increase the efficiency at low load current (<1.5A)? 
 - Is there a minimum load current? 
 We have to regulate some TEC with these specifications : 
 - 3.3V max and 1.2A max 
 - 1.45V max and 0.8A max 
 - 3.8V max and 1.4A max 
 - 1.3V max and 1A max 
 Do you recommend to use LT8722, ADN8834 or LTM4663? We need to have a digital regulation with the best stability.

ntenorio · Accepted Answer

Hi RGouget13 , 
 In addition, there is ADN8833 which is basically the ADN8834 without the chopper amp 1. This part is intended for digital control application of the ADN8834. But, kindly double check the output TEC current if also the same with the ADN8834 or a little lower. 
 
 Thanks, 
 Noel

ntenorio · Answer

Hi RGouget13 , Thanks for reaching out. In your given TEC specifications, I find the ADN8834 suitable, considering also the solution cost. The LT8722 has SPI comms to set the TEC voltage and current limits which can also be done in the ADN8834 with resistor values or voltage levels on the pin. All the applications conditions are within the specs of the ADN8834. Actually all of the parts mentioned can cater the required application. But then again, for optimized design including the solution cost, you can use the ADN8834. As for the questions regarding the efficiency, it is inherent with the part since both side should be able to sink and source - the linear and switching. Thanks, Noel

Electronic Design Services - PartnerZone

Products In This Thread

Digital thermoelectric cooler controller - LT8722

Top Replies