SLUUCG4 November 2022 TPS548C26
A description of each test point follows:
| REFERENCE DESIGNATOR | NAME | FUNCTION |
|---|---|---|
| J1 | VOUT | Output voltage scope monitor |
| J2 | IEXT | Load current interface for the input power telemetry |
| J3 | PVIN | VIN screw terminal to connect input voltage (see Table 1-1 for VIN range) |
| J4 | VOUT | VOUT screw terminal to connect load to output |
| J5 | EXTBIAS | Monitors internal LDO voltage or override internal LDO with external bias for improving efficiency |
| J6 | BIASSEL | Pin header to select PVIN or an external VCC. |
| J7, J12 | RED/+ | Connector blocks to interface with Mini Slammer |
| J8 | EN_ON | 2-pin header for enable. Add shunt to connect EN to PVIN and enable device. Remove shunt to disable device. |
| J9 | PGND | Power ground test point |
| J10 | ILIM | Pin header block to select current limit. |
| J11 | MODE | Pin header block to select switching mode and switching frequency. |
| J14 | IIN_EXT | Screw terminal to apply an external voltage source for input power telemetry. |
| J15 | ADDR/SS | Pin header block to select soft-start time |
| J16 | PG_PULLUP | PGOOD pullup pin. 2-pin header to pull up PGOOD to VCC. |
| COLOR REFERNCE | NAME | FUNCTION |
|---|---|---|
| Red | PVIN_SNS | Positive side of input voltage sensing point |
| Red | EN | Monitors enable pin |
| Red | VCCIO | External 1-V pullup for SVID |
| Red | BOOT | Monitors the bootstrap capacitor voltage |
| Red | VINSENP/AVIN | Positive voltage of the power sense resistor on the input power telemetry |
| Red | VO_EFF | Excellent output voltage sense point to measure efficiency |
| Red | VO_REG | Monitors the output voltage |
| Red | SW | Monitors output switching terminal of the power converter |
| Red | VINSENM/VCC | Voltage reference point of the power sense resistor on the input power telemetry |
| Red | EXTBIAS | Monitors the voltage on EXBIAS |
| Red | VCC/VDRV | Monitors the voltage on VCC/VDRV |
| Red | PG | Monitors the power good signal |
| White | BODE-CH1 | Inject frequency from the frequency response analyzer |
| White | BODE-CH2 | Measurement point of the receiving end from the frequency response analyzer |
| Black | PGND_SNS | Reference side of input voltage sensing point |
| Black | GOSNS | Remote sense reference for PGND |
| Black | GND | Power ground test point |
| Black | AGND | Analog ground test point |
| Black | PGND_EFF | Excellent output voltage reference sense point to measure efficiency |
| Black | GND_REG | Output voltage PGND sense point |
| TP1 | VOUT | Monitors output voltage |
| TP2 | SW | Monitors output switching terminal of the power converter |
| TP19 | EN | Monitors enable pin |
| TP25 | IIN_EXT S+ | Remote sense for the bias voltage used to supply the input power telemetry |
| TP26 | IIN_EXT S- | Negative remote sense for the input power telemetry |
| TP27 | VOSNS | Output voltage sense point for internal compensation circuitry |