JAJSNT3B April 2022 – August 2023 TPSI3052
PRODUCTION DATA
The TPSI3052 is capable of providing power from VDDM to support external auxiliary circuitry as shown in Figure 9-10. In this case, the required transfer power must include the additional power consumed by the auxiliary circuitry on the VDDM rail. The RPXFR value must be set to meet the overall power requirements.
As an example, assume that the auxiliary circuitry requires an average current of 4 mA. Table 9-4 summarizes the results from the TPSI3052 calculator tool. The Calculator tool can be found at Design Calculator.
RPXFR, kΩ | Power Converter Duty Cycle, % | IVDDP, mA | PIN, mW | POUT, mW | IOUT, mA | tSTART, µs | tRECOVER, µs | fEN_MAX, kHz | IAUX_MAX, mA |
---|---|---|---|---|---|---|---|---|---|
7.32 | 13.3 | 5.3 | 25.0 | 5.9 | 0.35 | N/A | N/A | N/A | N/A |
9.09 | 21.1 | 8.3 | 39.6 | 10.0 | 0.62 | N/A | N/A | N/A | N/A |
11 | 40.0 | 15.8 | 75.1 | 26.8 | 1.74 | N/A | N/A | N/A | N/A |
12.7 | 53.3 | 21.1 | 100.1 | 36.1 | 2.35 | 3557 | 96.0 | 10.4 | 4.1 |
14.7 | 66.7 | 26.4 | 125.2 | 45.5 | 2.98 | 2285 | 60.1 | 16.6 | 6.0 |
16.5 | 80.0 | 31.6 | 150.2 | 58.8 | 3.86 | 1549 | 39.3 | 25.5 | 8.6 |
20 | 93.3 | 36.9 | 175.2 | 68.8 | 4.52 | 1262 | 31.2 | 32.1 | 10.0 |
Based on the results in Table 9-4, several observations can be made: