SLVUCG3A September   2022  – March 2023 TPSM33625

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Setup Procedure
  5. 3Test Setup
  6. 4Schematic
  7. 5TPSM33625EVM and TPSM33625FEVM Evaluation
  8. 6Layout
  9. 7Bill of Materials
  10. 8Related Documentation
  11. 9Revision History

3 Test Setup

Table 3-1 Description of Jumpers, Test Points, and Terminal Blocks
Reference Designator Description
J1 Input to series, PI filter for EMC compliance testing. Note polarity, which is annotated in the silkscreen. Connect to a terminal block with a short, thick gauge (18AWG) wire.
TP1, TP2 VIN test points that bypass the EMC filter and connect directly to input capacitors. Enables more accurate efficiency measurements as well as potential parasitic minimization and signal integrity of AC measurements. Connect to test points with a short, thick gauge (18AWG) wire.
TP4 PGOOD test point for verifying PGOOD (output) flag feature.
TP3, TP6 VOUT test points connected directly to output capacitors. Enables more accurate efficiency measurements, as well, potential parasitic minimization and signal integrity of AC measurements. Connect to test points with a short, thick gauge (18AWG) wire.
J2 Output (VOUT) terminal block. Connect to terminal block with a short, thick gauge (18AWG) wire.
TP11, TP12 EN test point for accurately measuring EN voltage. If EN voltage is to be applied (externally), resistor R2 and R4 potentially can need to be removed.
J5 Disable the regulator by shorting the pins of the jumper.
J4

TPSM33625EVM:

Jumper for configuring the switching frequency of the converter. Using the "key" annotated in the schematic and also in the silkscreen.

Placing the jumper on the adjacent pins sets the annotated switching frequency.

TPSM33625FEVM:

Jumper for configuring the mode or for external signal source synchronization. The EVM is configured for fixed 1-MHz operation. The mode is set by using the "key" annotated in the schematic and also in the silkscreen, and by placing the jumper on the pins next to the annotated mode.

Auto mode: Diode emulation (discontinuous inductor current) and frequency foldback in light-load condition.

FPWM mode: Forced continuous conduction (continuous inductor current), constant frequency operation in light-load condition.

In addition to determining the mode of the device, this pin can be used for synchronization to the frequency and phase of an external signal source. Reference the data sheet for corresponding signal source requirements.
TP7, TP8 Test points for applying an external signal source to synchronize the regulator to. The synchronization function is only to be used with the TPSM33625FEVM (TPSM33625FRDNR).
J3 Jumper for configuring the output voltage. Set the voltage by using the "key" annotated in the schematic and also in the silkscreen, and by placing the jumper on the pins next to the annotated output voltage.
TP9, TP10 Test points for applying an AC signal source (across an injection resistor) often used in evaluating the loop response in a current mode regulator, such as the TPSM33625 or TPSM33625F.
GUID-20220510-SS0I-XMKQ-TXMP-2H0VV88FQTQ8-low.svgFigure 3-1 Test Setup Diagram