Hi there
I'm stuck on a fairly simple task. I want to make a DC/DC converter using a driver IC that is able to perform push-pull operation (applying Vcc or GND alternatingly to the inductor). I experimented with the TL494 but the problem with that one is, that the max. duty cycle ist about 45%, limiting the available output power.
If i operate it in parallel output mode, the duty cycle can go up to over 90%, but I loos the push-pull ability (which I need for the converter to be bi-directional). I was looking at some datasheets from standert TI dc-dc controllers which would fulfill all specs BUT: they provide a fixed reference voltage to the positive input of the error amplifier, meaning the output voltage of the converter is fixed, but i want to control the output voltage with a control voltage (which is easyly possible with the TL494).
So what I need is a simple DC-DC controller IC, that proviedes up to 200mA output current with push-pull operation and having both (positive and negative) error amplifier inputs available on a pin.
Thanks in advance
I'm stuck on a fairly simple task. I want to make a DC/DC converter using a driver IC that is able to perform push-pull operation (applying Vcc or GND alternatingly to the inductor). I experimented with the TL494 but the problem with that one is, that the max. duty cycle ist about 45%, limiting the available output power.
If i operate it in parallel output mode, the duty cycle can go up to over 90%, but I loos the push-pull ability (which I need for the converter to be bi-directional). I was looking at some datasheets from standert TI dc-dc controllers which would fulfill all specs BUT: they provide a fixed reference voltage to the positive input of the error amplifier, meaning the output voltage of the converter is fixed, but i want to control the output voltage with a control voltage (which is easyly possible with the TL494).
So what I need is a simple DC-DC controller IC, that proviedes up to 200mA output current with push-pull operation and having both (positive and negative) error amplifier inputs available on a pin.
Thanks in advance