1 Configuring One TPSM8D6C24EVM-2V0 as a Two-Phase Single Output Evaluation Module

In a two-phase configuration with Channel A set as the primary, the TPSM8D6C24 needs the following connections, along with their TPSM8D6C24EVM-2V0 reference designators:

1. GOSNS/FLWR_B pulled up to BP1V5_B (R11)
2. VSHARE_B connected to VSHARE_A (R26)
3. BCX_CLK_B connected to BCX_CLK_A (R19, already installed)
4. BCX_DAT_B connected to BCX_DAT_A (R20, already installed)
5. SYNC is already connected internally between the two converters.

To convert the TPSM8D6C24EVM-2V0 evaluation module from a dual output configuration to a dual phase configuration mimicking the TPSM8D6C24EVM-2PH make the following changes listed below. See Figure 1-1 and Figure 1-2 for visual reference.

1. Remove R39 (Bottom) to disconnect GOSNS/FLWR_B from the output ground
2. Install a 10-kΩ resistor in the R11 (Top) position (GOSNS/FLWR_B to BP1V5) to pull GOSNS/FLWR up to 1.5 V and configure Converter B as a Follower.
3. Remove R21 (Bottom - MSEL2_A to GND) to float the MSEL2 pin and configure Converter A as the primary converter of a 2-phase stack.
4. Install a 0-Ω resistor (you can reuse R21 if you did not damage it) in the R26 (Top) location (VSHAREA to VSHAREB) location to connect the output of the Channel A voltage error amplifier to Channel B.
5. Short VOUT_A and VOUT_B on the top and bottom of the PCB together by soldering the exposed copper area on the top and bottom of the PCB.
6. BCX_CLK_A is already connected to BCX_CLK_B through R19 and BCX_DAT_A is already connected to BCX_DAT_B through R20 since these pins are not used in a dual output configuration, and a common SYNC signal is used for both channel A and B.

On power up, Converter A will program Converter B's switching frequency, compensation, and output voltage, and serve as Converter B's connection to PMBus so R29, R33, R34, R35 are not required and can be removed. PMB_CLK_B, PMB_DAT_B, and PGOOD_B also do not need to be connected.