Hi team, could you tell what is the absolute maximum rating on OUT pin, which is not given in datasheet.
Hi Alfie,
ALM2403-Q1 consists two power amplifiers per package, and there are two OUT pins. Each OUT pin is able to source 500mA or sink 400mA at 25C as shown in the table below. At lower temperature, the OUT pin can source or sink at higher current, while the pin will limit the max. current rating at the elevated temperature, see the Figure 6-27 below.
BTW, the OUT pin short-circuit to GND current condition is limited one amplifier per package.
The maximum current rating is a function of heat dissipation that ALM2403-Q1 package is able to withstand at a given operating temperature and the voltage/current amplitudes that drives a load (e.g. resolver). You would like to keep the package's Tj as low as possible under worst case operating conditions, not exceeding the Tj temperature.
Below is the link fof the ALM2403-Q1 EVM.
If you are able to provide me with the input and output of resolver requirements, I will be able to provide the customer with a complete simulation, and estimate the heat dissipation of the ALM2403-Q1 under the worst case operating conditions via Tina Simulation. If you need further assistant, please let me know.
Best,
Raymond
Hi Raymond, sorry for unclear description, I want to ask the maximum voltage on OUT pin, which is presented in ALM2402, but not in ALM2403.
Hi Alfie,
The max. Voltage on Out pins should be limited to 26V for a single supply rail, but the nominal operating voltage recommendation is only 24V.
If the dual supply rails are used, the delta voltage from (V+ - V-) <= 26V (you may add 26V + 0.7V of ESD diode voltage drop on OUT pins for single supply rail). For any fault conditions above the 26Vdc on OUT1 and OUT2 pins, you need to find a way to clamp it, see the attached application note. For any fault conditions, you will have to clamp the output voltage, also limit the current at OUT1 and OUT2 pins.
If you have additional questions, please let me know.
Best,
Raymond
