Other Parts Discussed in Thread: LM3410
Hi Team,
We want to design a valve driver (Shape memory) for one of our projects.
The valve is a shape memory valve with a resistance of 2.2 Ohms and a maximum rated power of 0.3W.
The vale requires a constant current driver.
We have eight (8) such valves of which only four (4) will be operational at any given time.
The 8 valves are electrically connected in series.
The nonoperational valve is bypassed using a MOSFET connected parallel to all the valves (like in the case of battery balancing).
My input is from a 3.7V nominal voltage battery (2.8V - 4.2V).
The current through the valves will be 250mA maximum.
1). I believe, TPS61169DCKR is the best choice for our case. Please suggest another chip if this cant be used.
2). The same chip is not available in mouser or Digikey. Is there any potential alternative for the same?.
3). I believe, when the PWM pin is held low, the IC is disabled and the IC is enabled when the PWM pin is held at 3.3V.
4). Is the TPS61169DCKR IC is able to drive 350mA of load current?.
5). The chip does not support load disconnect, Is there any IC available with load disconnect?.
6). Generally almost all DC-DC converters (buck and boost) mention their Switching current only. How is the switching current related to the output current?.