SNVU571A December 2017 – February 2022 TPSM846C24
Wire-loop test points and scope probe test points are provided as convenient connection points for digital voltmeters (DVM) or oscilloscope probes to aid in the evaluation of the device. Table 3-1 provides a description of each test point:
| Test Point | Description |
|---|---|
| VIN | Input voltage monitor. Connect DVM across this point and PGND for measuring efficiency. |
| VS+ | Supply path output voltage monitor. Connect DVM positive lead to this point for line and load regulation. |
| VS– | Return path output voltage monitor. Connect DVM negative lead to this point for measuring line and load regulation. |
| VOUT | Output voltage monitor. Connect DVM to this point and PGND for measuring efficiency. |
| PGND | Input and output voltage monitor grounds. Reference the VIN and VOUT DVMs to these ground points. |
| VIN MON (J1) | Input voltage scope monitor. Connect an oscilloscope to this set of points to measure input ripple voltage. |
| VOUT MON (J2) | Output voltage scope monitor. Connect an oscilloscope to this set of points to measure output ripple voltage and transient response. |
| AGND | Analog ground point. Use any of the AGND test points as the ground reference for the control signals. |
| ALERT | PMBus ALERT line, used to monitor the ALERT signal. |
| CLK | PMBus CLK line, used to monitor the CLK signal. |
| DATA | PMBus DATA line, used to monitor the DATA signal. |
| PGOOD | Monitors the power-good signal of the device. This is an open-drain signal that has an on-board 10-kΩ pullup resistor to 3.3 V. |
| CNTL | Control pin, pull to GND to stop power conversion. Float or pull to 3.3 V to enable power conversion. An internal 10-kΩ pullup resistor to 3.3 V is present on the EVM. |
| Signal | Signal injection point for the Bode plot analyzer. Inject from Signal to CHB. |
| CHA | Input signal monitoring point for the Bode plot analyzer |
| CHB | Output signal monitoring point for the Bode plot analyzer |
| DIFFO | Output of remote sense differential amplifier |
| SYNC | Connects to the SYNC pin of the device. An external clock signal can be applied to this point to synchronize the device to an appropriate frequency. |
| PH | Switch node of the TPSM846C24 device. Use an un-hooded scope probe to monitor this point. |
Refer to the TPSM846C24 4.5-V to 15-V Input, 0.5-V to 2.0-V Output, 35-A Power Module Data Sheet for absolute maximum ratings associated with features in Table 3-1.