1 Introduction
User's GuideSLVU319 – July 2009
TPS55332EVM
Contents1 Introduction ................................................................................................................... 12 Setup .......................................................................................................................... 22.1 Input/Output Connector Description .............................................................................. 22.2 Setup ................................................................................................................. 22.3 Operation ............................................................................................................ 22.4 EMC Filter ........................................................................................................... 23 Board Layout ................................................................................................................. 24 Schematic and Bill of Materials ............................................................................................ 54.1 Schematic ............................................................................................................ 54.2 Bill of Materials ...................................................................................................... 6
List of Figures
1 Enable Jumper Settings..................................................................................................... 22 Top Assembly Layer ......................................................................................................... 33 Top Layer Routing ........................................................................................................... 34 Bottom Layer Routing ....................................................................................................... 45 TPS55332EVM Schematic ................................................................................................. 5
List of Tables
1 Device and Package Configurations ...................................................................................... 12 TPS55332EVM Bill of Materials ........................................................................................... 6
The Texas Instruments TPS55332EVM evaluation module (EVM) helps designers evaluate the operationand performance of the TPS55332 Switch Mode Power Supply – Boost Regulator. The device offersconfigurability and can be setup to operate at a switching frequency from 80kHz to 2.2MHz.
The EVM contains one DC / DC converter (See Table 1 ).
Table 1. Device and Package Configurations
CONVERTER IC PACKAGE
U1 TPS55332QPWPQ1 PWP-20
PowerPAD is a trademark of Texas Instruments.
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2 Setup
2.1 Input/Output Connector Description
ENA
disabled
ENA
enabled
2.2 Setup
2.3 Operation
2.4 EMC Filter
3 Board Layout
Setup
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This section describes the jumpers and connectors on the EVM as well and how to properly connect, setup and use the TPS55332EVM.
J1 – Input is the power input terminal for the converter. The terminal block provides a power (Vbat) andground (GND) connection to allow the user to attach the EVM to a cable harness.
J2 – Output is the regulated output voltage for the converter. The terminal block provides a power (V
OUT
)and ground (GND) connection to allow the user to attach the EVM to a cable harness.
J3 – Sync is the input terminal for an optional external input clock to the converter. The external clock canbe used to synchronize the switching frequency for multiple devices. The external clock frequency mustmeet the Fsw < Fext < 2 ×Fsw guideline, if used.
JP1 – Enable is the jumper used to enable the converter. The converter will be enabled when the Enableis high and disabled when low. The jumper placement allows the converter to be enabled or disabled.
Figure 1. Enable Jumper Settings
The input voltage range for the converter is 3.6 volts to 24 volts. A load should be applied to the Outputterminal for proper operation.
For proper operation of the TPS55332, JP1 should be properly configured. The recommended setting,using shorting blocks.
JP1 to Enabled
In this configuration, the device will power up when power is applied.
The EVM has a pi filter input stage to provide improved EMC performance. A reverse battery protectiondiode, D2, is also installed. The diode and pi filter are not required for normal operation of the boostregulator.
Figure 2 ,Figure 3 and Figure 4 show the board layout for the TPS55332EVM PWB. A jumper is providedto Enable the device.
The TPS55332 are high efficiency, but does dissipate power. The PowerPAD™ package offers anexposed thermal pad to enhance thermal performance. This must be soldered to the copper landing onthe PCB for optimal performance. The PCB provides 2 oz copper planes on the top and bottom todissipate heat.
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4 Schematic and Bill of Materials
4.1 Schematic
GND
GND
GND
GND
GND
Enable
1
JP1
2k
R6
0.47uF
C11 0
R10
TP1
GND
100k
R7
22uH
2 1
L2
8.66k
R11
267k
R8
V_REG
V_REG
VIN
GND
GND
GND
V_REG
VIN
GND
GND
GND
49.9
R2
TP2
11.3k
R9
D2
GND
GND
0.1uF
C7
GND
0.1uF
C10
0.1uF
C6
2.2nF
C9
1
2
J1
1
2
J2
4.99k
R5
GND
GND
GND
GND
SW
10uH
2
1
L1
VIN
0.1uF
C4 GND
GND
GND
GND
GND
GND
VBAT
VOUT
D3
D1
GND
SYNC
GND
200k
R4
10k
R1
DNP
R310uF
2 1
+C8
RSLEW
7
GND
4
NC
1
SS 11
VSENSE 14
PGND 17
BOOT 20
RST
8
CDLY
9
GND
10
EN
5
NC
2
SYNC
3
RST_TH 13
GND 12
VREG 16
VIN 19
PH18
RT
6COMP 15
PAD
21
U1 TPS55332
0-24V
25V
500mA
0.1uF
C1
2 1
+
100uF
C2
2 1
+
10uF
C3
2 1
+
10uF
C5
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Schematic and Bill of Materials
Figure 5. TPS55332EVM Schematic
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4.2 Bill of MaterialsSchematic and Bill of Materials
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Table 2. TPS55332EVM Bill of Materials
COUNT REF DES DESCRIPTION SIZE MFR PART NUMBER
3 C1, C4, C7 Capacitor, ceramic, 0.1uF, 50V, 10% 1206 KEMET C1206C104K5RACTU1 C2 Capacitor, electrolytic, 100uF, 50V, 8.3mm x 8.3mm Panasonic EEV-FK1H101P20%2 C3, C5 Capacitor, electrolytic, 10uF, 50V, 5.0mm x 5.8mm Panasonic EEV-FK1H100UR20%2 C6, C10 Capacitor, ceramic, 0.1uF, 50V, 10% 0603 muRata GCM188R71H104KA57B1 C8 Capacitor, ceramic, 10uF, 50V, 10% 2220 TDK C5750X7R1H106M1 C9 Capacitor, ceramic, 2.2nF, 50V, 10% 0603 muRata GCM1885C1H222JA16B1 C11 Capacitor, ceramic, 0.47uF, 16V, 0603 muRata GCM188R71C474KA55B10%3 D1, D2, D3 Diode, Schottky, 3A, 100V SMC IR 30BQ1002 J1, J2 Terminal block, 2-pin, 6A, 3.5mm 0.25 ×0.27 OST ED15145 SW, SYNC, Test point, 52-mil 0.052 Kobiconn 151-103-RCVBAT, VIN,VOUT1 EN Header, 3-pin, 100-mil spacing, 0.100 ×3 Sullins PEC03SAAN(36-pin strip)1 EN Connector jumper, shorting, 100-mil 0.100 Sullins SPC02SYANspacing1 L1 Inductor, SMT, 10-uH 12.3mm ×Coilcraft MSS1278T-10312.3mm1 L2 Inductor, SMT, 22-uH 12.3mm ×Coilcraft MSS1278T-22312.3mm1 R1 Resistor, chip, 10-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF1004V1 R2 Resistor, chip, 49.9- Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF49R9V1 R3 Do not populate1 R4 Resistor, chip, 200-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF2003V1 R5 Resistor, chip, 4.99-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF4991V1 R6 Resistor, chip, 2-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF2001V1 R7 Resistor, chip, 100-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF1003V1 R8 Resistor, chip, 267-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF2673V1 R9 Resistor, chip, 11.3- k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF1132V1 R10 Resistor, chip, 0- Ω, 1/16W, 1% 0603 Panasonic ERJ-3GEY0R00V1 R11 Resistor, chip, 8.66-k Ω, 1/16W, 1% 0603 Panasonic ERJ-3EKF8661V1 U1 IC, TPS55332-Q1PWPR TI TPS55332QPWP1 - PCB, 2.2-inch x 2.0-inch x 0.062 Any TPS55332, REV C
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EVALUATION BOARD/KIT IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSESONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must haveelectronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be completein terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmentalmeasures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit doesnot fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days fromthe date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYERAND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OFMERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claimsarising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and allappropriate precautions with regard to electrostatic discharge.EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANYINDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents orservices described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. Thisnotice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/orsafety programs, please contact the TI application engineer or visit www.ti.com/esh .No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, orcombination in which such TI products or services might be or are used.FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSESONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radiofrequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which aredesigned to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments maycause interference with radio communications, in which case the user at his own expense will be required to take whatever measures maybe required to correct this interference.
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EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 0V to 40V and the output voltage range of 2.5V to 50V.Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questionsconcerning the input range, please contact a TI field representative prior to connecting the input power.Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,please contact a TI field representative.During normal operation, some circuit components may have case temperatures greater than 85 °C. The EVM is designed to operateproperly with certain components above 85 °C as long as the input and output ranges are maintained. These components include but arenot limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identifiedusing the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,please be aware that these devices may be very warm to the touch.
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