Tool/software:
Dear TI Support Team,
I would like to ask a few technical questions regarding the TL594 PWM controller IC, particularly related to the characteristics of its internal error amplifier. These details are not listed in the datasheet, and we would appreciate any guidance or internal insights you can share.
【Question 1】Response characteristics of the error amplifier (Ref: TL594 datasheet page 10/36, Figure a)
(1-1)
Does TI have any data on the response time of the error amplifier output when a signal is applied to the *IN+ and *IN– inputs?
Specifically, we would like to understand the rise time of the output voltage.
(1-2)
At the moment when control transitions from soft-start to error amplifier mode, how much delay typically occurs in the output of the error amplifier?
(1-3)
Is there any input hysteresis behavior in the error amplifier when *IN+ and *IN– are used?
Additionally, how long does it typically take for the error amplifier output to respond after the reference threshold is exceeded?
【Question 2】Alternative ICs
(2-1)
Is there any TI device that offers similar functionality to the TL594, but with faster response characteristics in the error amplifier section?
【Reference Figure (Figure a)】
TL594 datasheet (page 10/36)
TL594 Datasheet PDF
【Background】
The reason for this inquiry is that in our application, the error amplifier output appears to rise too slowly when switching from soft-start to error amplifier mode, which causes overshoot beyond the reference threshold. We would like to confirm the amplifier’s timing behavior in more detail.
【Request】
If possible, we would appreciate a response by Thursday, July 17 (JST).
If additional time is needed, please kindly let us know.
Thank you in advance for your support.
