I need drive a TEC device (inside of a LASER module) with almost 2 Amps.
I need to know if my analysis about the OUTPUT STAGES of the ADN8834 device are correct.
I don't see any possibility (by external circuit such as Mosfet Driver) of to boost the output current (> 1.5 Amps) to the TEC device, except with a very complicated solution.
According the Block Diagram of ADN8834 (Thermoelectric Controller chip), ; there are two sections inside of the chip, "TEC DRIVER LINEAR STAGE" and "PWM POWER STAGE", and there is a voltage monitoring via SFB and LDR pins. According Data Sheet, there are many constrains involved on the Output Voltage VDLR, VSFB and the selection of the Inductor then, in a general approach, I can't see how the system stability can be sustained.
Thanks in advance.