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UM_2111_PL12_2111_035514
User manual for TDM3885 evaluation board
4 A synchronous buck voltage regulator with integrated inductor
About this document
Scope and purpose
The TDM3885 4 A point-of-load (POL) module is an easy-to-use, fully integrated and highly efficient DC-DC
module. The module's pulse width modulation (PWM) controller, MOSFETs and inductor make TDM3885 a
space-efficient solution, providing accurate power delivery. The TDM3885 employs an enhanced stability
engine that makes it stable with ceramic capacitors without compensation.
This user manual contains the schematic and bill of materials (BOM) for the EVAL_TDM3885_3.3Vout
engineering evaluation board. The guide describes operation and use of the evaluation board itself. Detailed
application information for TDM3885 is available in the TDM3885 datasheet.
Intended audience
This document is intended as a guide for design engineers evaluating the performance of TDM3885 with the
engineering EVAL_TDM3885_3.3Vout demo board.
Table of contents
About this document ....................................................................................................................... 1
Scope and purpose ......................................................................................................................... 1
Intended audience .......................................................................................................................... 1
Table of contents ............................................................................................................................ 1
1
Board information .................................................................................................................. 2
1.1
Board picture and overview .................................................................................................................... 2
1.2
Board features ......................................................................................................................................... 2
1.3
Connections and operating instructions ................................................................................................ 3
1.4
Power-on procedure ............................................................................................................................... 4
1.5
PCB layout ............................................................................................................................................... 5
1.6
Schematic ................................................................................................................................................ 8
1.7
Bill of materials ........................................................................................................................................ 9
2
Typical operating waveforms ................................................................................................. 10
2.1
P
= 5 V .................................................................................................................................................. 10
2.2
P
= 12 V ................................................................................................................................................ 11
Revision history............................................................................................................................. 17
User Manual
www.infineon.com/optimos-ipol
Please read the Important Notice and Warnings at the end of this document
page 1 of 18
V 1.0
2022-04-28
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Summary of Contents for Infineon TDM3885
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Page 1: Table Of Contents
The guide describes operation and use of the evaluation board itself. Detailed application information for TDM3885 is available in the TDM3885 datasheet. Intended audience This document is intended as a guide for design engineers evaluating the performance of TDM3885 with the engineering EVAL_TDM3885_3.3Vout demo board. Table of contents About this document ........................ -
Page 2: Board Information
UPUT APACITORS IN [+] OUT [+] MEASUREMENT Figure 1 TDM3885 evaluation board, dimensions (width x length x thickness) = 40 mm x 40 mm x 1.5 mm Board features • = 12 V, V = 3.3 V, I = 0 A to 4 A •... -
Page 3: Connections And Operating Instructions
Connections and operating instructions The TDM3885 demo board allows dual configuration +12 V or +5 V for the input power and can deliver up to 4 A load current. The operation modes and overcurrent protection (OCP) limits can be selected through jumpers. -
Page 4: Power-On Procedure
User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Board information Power-on procedure Table 2 Power-on steps Jumper Description Configure jumper to set OCP threshold Configure jumper to select P Configure jumper to select between FCCM and DEM... -
Page 5: Pcb Layout
1.5 oz. plating. Inner layers use 2 oz. copper. The PCB thickness is 0.062 in. Layer stack-up is top – GND1 – GND2 – signal – GND3 – bottom. The TDM3885 and other major power components are mounted on the top side of the board. Figure 2 Layer stack-up –... - Page 6 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Board information Figure 3 Layer stack-up – signal (top) and GND 1 (bottom) User Manual 6 of 18 V 1.0 2022-04-28...
- Page 7 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Board information Figure 4 GND 2 (top) and GND 3 (bottom) User Manual 7 of 18 V 1.0 2022-04-28...
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Page 8: Schematic
User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Board information Schematic Figure 5 Schematic of the TDM3885 evaluation board User Manual 8 of 18 V 1.0 2022-04-28... -
Page 9: Bill Of Materials
User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Board information Bill of materials Table 3 Bill of materials Part Qty. reference Value Manufacturer Part number Description Ceramic capacitor, 10 µF, 0603, 25 V, 10 µF... -
Page 10: Typical Operating Waveforms
User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms Typical operating waveforms = 5 V Figure 6 Start-up, P = 5 V, V = 3.3 V, I = 0 A, FCCM. Ch1 = V... -
Page 11: Vin
User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms = 12 V Figure 8 Start-up, P = 12 V, V = 3.3 V, I = 0 A, FCCM. Ch1 = V... - Page 12 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms Figure 10 Start-up pre-bias (1 V), P = 12 V, V = 3.3 V, I = 0 A, FCCM. Ch1 = V...
- Page 13 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms Figure 12 Recover from a shorted V = 12 V, V = 3.3 V, I = 4 A, FCCM. Ch1 = V...
- Page 14 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms Figure 14 Transient response, P = 12 V, V = 3.3 V, I = 0 A to 3 A, FCCM. Ch1 = V , Ch2 = I Slew rate = 5 A/µS...
- Page 15 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms Figure 15 Load regulation, P = 12 V, V = 3.3 V Figure 16 Efficiency, P = 12 V, V = 3.3 V...
- Page 16 User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Typical operating waveforms Room temperature, no airflow. Board data: TDM3885 EVB DB310 REV 5B Dimensions (width x length x thickness) = 40 mm x 40 mm x 1.5 mm...
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Page 17: Revision History
User manual for TDM3885 evaluation board 4 A synchronous buck voltage regulator with integrated inductor Revision history Revision history Document version Date of release Description of changes V 1.0 2022-04-28 Initial release User Manual 17 of 18 V 1.0 2022-04-28... - Page 18 Do you have a question about this Except as otherwise explicitly approved by Infineon information given in this application note. Technologies in a written document signed by...