To whom it might concern,
We are currently uing the UCC15702 and UC1907 chips for DC/DC converter applications that require good electrical performance stability over -55C to 125C. We have the following questions that we could not find answers from their datasheets:
(1) UCC15702:
(a) What is the tempco of the 0.7V Level Shifter indicated in the block diagram on page 4 of the datasheet?
(b) Does the above tempco of the 0.7V Level Shifter change with the bias voltage at the FB pin?
(2) UC1907:
(a) What is the 'output dynamic range' in which the Voltage Error Amplifier (VEA) maintains its high gain peformance (>60dB)? I am not asking the maximum voltage swing at the output terminal but the voltage swing that the VEA still responses to its input signal with high gain. A plot showing the Gain Variation vs. Output Swing will be helpful.
Your timely response will be greatly appreciated!
Best Regards,
Lorentz