Tps54528 - VESTEL MB120 DS Service Manual

VDD_Audio goes directly to the audio side, through power socket other incoming voltages from power card
are converted several voltages, shown in figure 4.2.
List of the components are:

• TPS54528

• TPS54628
• TPS54821
• TPS56320
• FDS4685
• NTGS3446
• APL5910
• AP2111H
A. TPS54528
General Description
The TPS54528 is an adaptive on-time D-CAP2 mode synchronous buck converter.The TPS54528 enables
system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low
component count, low standby current solution. The main control loop for the TPS54528 uses the D-CAP2
mode control that provides a fast transient response with no external compensation components. The adaptive
on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode
operation at light loads. Eco-mode allows the TSP54528 to maintain high efficiency during lighter load
conditions. The TPS54528 also has a proprietary circuit that enables the device to adopt to both low equivalent
series resistance (ESR)output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.
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Figure 6: General illustration of voltage stages on main board.