SLVSHR7 August 2024 TPSM8287A12M , TPSM8287A15M
PRODUCTION DATA
The TPSM8287A1xM module family consists of device variants with different switching frequencies. For available options see Table 4-1. The different switching frequencies allows the selection of the device which provides the best efficiency by optimizing the power losses for a given use case.
A lower switching frequency version does not necessarily offer a higher efficiency across the entire load, Vin or Vout range. The lower switching frequency does reduce the switching losses in the power stage, but at the same time leads to a higher ripple current in the inductor which leads to higher inductor losses, higher output voltage ripple, and a lower maximum output current (see Section 7.3.13). Because of this, TI recommends to compare the efficiency when picking a certain device variant.
Figure 7-13 and Figure 7-14 provide an efficiency comparison between the 1.5MHz TPSM8287A12BAM and 2.25MHz TPSM8287A12BBM. For output voltages ≥ 1.2V, the efficiency between the 2.25MHz and 1.5MHz device is almost the same for high load currents, whereas the 2.25MHz version gives higher efficiency at load currents below 3A. The 1.5MHz device generally gives higher efficiency for the other operating points, especially for lower output voltages. For output voltages >= 1.2V, TI recommends the 2.25MHz device for most applications due to the comparable efficiency, lower output voltage ripple, and higher maximum output current.
VIN = 3.3V | TA = 25°C | FPWM |
VIN = 5.0V | TA = 25°C | FPWM |