Other Parts Discussed in Thread: UCC29002
Tool/software:
Hi,
we are using the UCC29002 for active load sharing. According to the UCC29002 evaluation datasheet, it is required to first determine the power module bandwidth (PDF700S560) before connecting the module with the active load sharing circuit.
The datasheet states:
"Power modules usually have a very low bandwidth to ensure proper operation with a variety of loads. The transfer function is determined using a network analyzer and injecting a small signal across a 20-Ω to 50-Ω resistor placed between the positive sense terminal and the positive voltage output terminal as shown in Figure 2. The resultant Bode plot will show the DC gain and the unity gain crossover frequency of the module. Expect the module’s crossover frequency to be within the range from 10 Hz to 30 kHz. The desired crossover frequency for the load-share loop is set well before the crossover frequency of the modules. This is accomplished by adding a zero to the compensation of the transconductance error amplifier as described in the error amplifier section. The unity gain crossover frequency is unique to the specific module and must be measured for each module type."
Please see the attached figure for reference. As we do not currently have the required vector network analyzer, we would greatly appreciate your support in providing the unity gain crossover frequency (Fco) of the module(PDF700S560). This information is critical for completing our design calculations.
regards
Ahsan
