SLVUAV5B March   2017  – February 2022 TPSM846C23

 

  1.   Trademarks
  2. 1Description
  3. 2Getting Started
  4. 3Test Point Descriptions
  5. 4Operation Notes
  6. 5Performance Data
  7. 6Schematic
  8. 7Bill of Material
  9. 8PCB Layout
  10. 9Revision History

3 Test Point Descriptions

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. A description of each test point follows:

Table 3-1 Test Points
VINInput 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.
VOUTOutput voltage monitor. Connect DVM to this point and PGND for measuring efficiency.
PGNDInput 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.
AGNDAnalog ground point. Use any of the AGND test points as the ground reference for the control signals.
ALERTPMBus ALERT line. Used to monitor the ALERT signal.
CLKPMBus CLK line. Used to monitor the CLK signal.
DATAPMBus DATA line. Used to monitor the DATA signal.
PGOODMonitors the power good signal of the device. This is an open-drain signal that has an on-board 10-kΩ pullup resistor to 3. 3V.
CNTLControl 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 3.3V is present on the EVM.
SignalSignal injection point for the Bode plot analyzer. Inject from Signal to CHB.
CHAInput signal monitoring point for the Bode plot analyzer.
CHBOutput signal monitoring point for the Bode plot analyzer
DIFFOOutput of remote sense differential amplifier
SYNCConnects 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.
PHSwitch node of the TPSM846C23 device. Use an un-hooded scope probe to monitor this point.
Note:

Refer to the TPSM846C23 4.5-V to 15-V In, 0.35-V to 2-V Out, 35-A PMBus Power Module Data Sheet for absolute maximum ratings associated with features in Table 3-1.