Hello! Pls, tell me when is tpic6a596 used? In which cases?
Is it better than tpic6a595?
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Hi Michael! Thank you for your answer.
In datasheet of TPIC6A596 I found the following feature: Enhanced Cascading for Multiple Stages.
Could you pls describe it?
Which are advantages of TPIC6A596 Cascading over TPIC6A595 Cascading?
Hi Michael! Thank you for your answer.
Several questions about tpic6a596:
1. Can tpic6a596 manage solenoids, each 48V, 240mA? Will it work stable?
2. Has tpic6a596 flyback current protection for inductive load? Don't I need use additional diode near solenoid for protection?
3. Which value of voltage drop is in tpic6a596 for full load (8 solenoids 48V, 240mA) and temperature 25°C ?
Denis,
1. If you refer to Figure 8 in the datasheet, it shows that if all 8 outputs are conducting simultaneously then they can each have a current up to 350mA when VCC = 5V and Ta = 25C. Please note that the device will heat up under these conditions, limiting the maximum current, so proper heatsinking is recommended as this is a lot of continuous current.
2. The datasheet states: "The device contains a built-in voltage clamp on the outputs for inductive transient protection"
This protection is achieved internally through the use of a zener diode to ground. Refer to the graphic labelled "Typical of all drain outputs" in the schematic section of the datasheet.
3. Please refer to Figure 10: "Static Drain-Source On-State Resistance vs Drain Current" in the datasheet.
This figure provides the Rds(on) value of the FET and therefore you can calculate the voltage drop based on the current.
Best,
Michael
Michael,
after solenoid will be disconnected from 48V, high voltage (may be more 50V ?) will be flyback. So, perhaps additional diode is needed near so powerfull solenoid, how do you think? Or TPIC6A596 has perfect protection for it?