TPIC74100EVM User Guide Datasheet by Texas Instruments

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TPIC74100EVM User's Guide
User's Guide
Literature Number: SLIU002
September 2008
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Contents
1 Introduction ......................................................................................................................... 5
2 Setup .................................................................................................................................. 5
2.1 Input/Output Connector Description .................................................................................... 5
2.2 Setup........................................................................................................................ 6
2.3 Operation ................................................................................................................... 7
3 Board Layout ....................................................................................................................... 7
4 Schematic ......................................................................................................................... 10
Important Notices ............................................................................................................... 12
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List of Figures
1 Slew Rate Jumper Settings ................................................................................................. 5
2 Low Power Mode Jumper Settings ........................................................................................ 6
3 Enable Jumper Settings..................................................................................................... 6
4 5Vg Regulated Output Jumper Settings .................................................................................. 6
5 Low Pass Filter Inductor Bypass Jumper Settings ...................................................................... 6
6 Top Assembly Layer ......................................................................................................... 7
7 Bottom Assembly Layer ..................................................................................................... 8
8 Top Layer Routing ........................................................................................................... 8
9 Bottom Layer Routing ....................................................................................................... 9
10 TPIC74100EVM Schematic ............................................................................................... 10
List of Tables
1 Device and Package Configurations ...................................................................................... 5
2 TPIC74100EVM Bill of Materials ......................................................................................... 11
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[SI I@ IQ IE]
1 Introduction
2 Setup
2.1 Input/Output Connector Description
SCR1
slow
SCR0
1
0
SCR1
medium -slow
SCR0
1
0
SCR1
medium -fast
SCR0
1
0
SCR1
fast
SCR0
1
0
User's GuideSLIU002 – September 2008
TPIC74100EVM User's Guide
The Texas Instruments TPIC74100EVM evaluation module (EVM) helps designers evaluate the operationand performance of the TPIC74100 Switch Mode Power Supply – Buck Regulator. The EVM contains oneDC/DC converter (See Table 1).
Table 1. Device and Package Configurations
CONVERTER IC PACKAGE
U1 TPIC74100QPWPRQ1 PWP-20
This section describes the jumpers and connectors on the EVM as well and how to properly connect, setup, and use the TPIC74100EVM.
J1 – VBAT is the power input terminal for the converter. The terminal provides power (Vbat).
J2 – GND is the ground terminal for the EVM.
J3 – 5Vg is the power output terminal for the 5Vg regulator output.
J4 – VOUT is the regulated output voltage for the converter.
J5 – GND is a ground terminal for the EVM.
JP1, JP2 – SCR1, SCR0 are jumpers used to set the slew rate of the switching transistor for the L1terminal switch pin. Jumpers allow the slew rate to be set to four set points.
Figure 1. Slew Rate Jumper Settings
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g g @
LPM
disabled
LPM
enabled
1
0
1
0
EN
disabled
EN
enabled
1
0
1
0
5Vg
disabled
5Vg
enabled
1
0
1
0
BYPASS
active
BYPASS
shorted
2.2 Setup
Setup
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JP3 – LPM is the jumper used to enable Low Power Mode. The jumper allows LPM to be enabled ordisabled. The device will operate in Normal mode when LPM is disabled.
Figure 2. Low Power Mode Jumper Settings
JP4 – Enable is the jumper used to enable the converter. The converter is enabled when the Enable ishigh and disabled when low. The jumper placement allows the converter to be enabled or disabled.
Figure 3. Enable Jumper Settings
JP5 – 5VgEN is the jumper used to enable switched 5V regulated output. The output is enabled when theEnable is high and disabled when low. The jumper placement allows the converter to be enabled ordisabled.
Figure 4. 5Vg Regulated Output Jumper Settings
JP6 – Bypass is the jumper used to bypass the low pass filter inductor on the power supply input to thedevice. This allows the user to remove the filter from the circuit. The jumper placement allows the inductorto be active or shorted.
Figure 5. Low Pass Filter Inductor Bypass Jumper Settings
The input voltage range for the converter is 1.5 volts to 40 volts. The input voltage must be at least 5 Vduring start up.
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2.3 Operation
3 Board Layout
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Board Layout
For proper operation of the TPIC74100, JP1, JP2, JP3, JP4, JP5, and JP6 should be properly configured.The recommended setting, using shorting blocks:
JP1 and JP2 to Fast
JP3 to Enabled
JP4 to Enabled
JP5 to Enabled, if 5Vg is used
JP6 to Shorted
In this configuration, the device powers up when power is applied. JP1, JP2 SCR0, SCR1 select howswitch pin slew rate is set: slow, medium-slow, medium-fast, or fast. JP3 LPM selects how Low PowerMode is set: Enabled or Disabled. JP4 EN turns the device on or off. JP5 5Vg turns the regulated 5-Voutput on or off. JP6 Bypass disables the low-pass filter located on the input supply to the device.
Figure 6, Figure 7, Figure 8, and Figure 9 show the board layout for the TPIC74100EVM PWB. The EVMoffers resistors, capacitors, and jumpers to program the switch pin slew rate and regulator turn-on Delay.Jumpers are also provided to enable the device and to enable the low-power mode option.
The TPIC74100 offers 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 1-oz copper planes on the top and bottom todissipate heat.
Figure 6. Top Assembly Layer
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Board Layout
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Figure 7. Bottom Assembly Layer
Figure 8. Top Layer Routing
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INSTRUMENTS
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Board Layout
Figure 9. Bottom Layer Routing
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4 Schematic
GND
C2
C7
GND
D2
Aout 13
L1
5
Cboot2
25Vg_ENABLE 19
Rmod 15
GND 16
L2
7
PGND
6
Vdriver
4
Cboot1
3
SCR1
1
ENABLE 18
Vlogic 17
SCR0 20
5Vg
9
Ain
10
Vout
8
RESET 12
PAD
1
2
REST 14
TPIC74100PWP
CLP 11
2
1
L1
C1
GND
GND
GND
C3
GND
R1
GND
C4
GND
R3
R4
GND
C10
VOUT
1
JP1
D1
2 1
L2
R2
R5
GND
VDRIVER
AIN
VBAT
VDRIVER
AIN
VLOGIC
SCR1
SCR1
GND
1
JP2
VLOGIC
SCR0
SCR0
VLOGIC
C5
GND
VOUT
VOUT
GND
ENABLE
VDRIVER
ENABLE
5VG_ENABLE
GND
1
JP5
5VG_ENABLE
VDRIVER
C9
GND
JP6
5Vg
2 1
+C6
2 1
+C8
GND
REST
AOUT
RESET
GND
GND
GND
GND
GND
1
JP3
VLOGIC
LPM
LPM
1
JP4
Schematic
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Figure 10. TPIC74100EVM Schematic
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Schematic
Table 2. TPIC74100EVM Bill of Materials
REFCOUNT DESCRIPTION SIZE MFR PART NO.DES
Capacitor, ceramic, 4.7nF,2 C1, C2 0603 muRata GRM188R71H472KA01B50V, 10%
Capacitor, ceramic, 470nF,1 C3 0603 muRata GRM188R71C474KA88B16V, 10%
Capacitor, ceramic, 100nF,2 C4, C7 0603 muRata GRM188R71C104KA01J16V, 10%
Capacitor, ceramic, 100nF,1 C5 1206 muRata GCM319R71H104KA37B50V, 10%
Capacitor, electrolytic,1 C6 10mm Rubycon 35ZL470M10X20470uF, 50V, 10%
Capacitor, tantalum, 47uF,1 C8 6032 Sprague 594D476X0016C2T16V, 20%
Capacitor, ceramic, 1uF,1 C9 0603 muRata GRM188R71C105KA12B16V, 10%
Capacitor, ceramic, 10nF,1 C10 0603 muRata GRM188R71C103KA01B16V, 10%
2 D1, D2 Diode, Schottky, 3A, 100V SMC IR 30BQ100
5 J1, J2, J3, J4, J5 Test point, 42-mil 0.042 Std Std
JP1, JP2, JP3, JP4, Header, 3-pin, 100-mil5 0.100 x 3 Sullins PTC36CAANJP5 spacing, (36-pin strip)
Header, 2-pin, 100-mil1 JP6 0.100 x 2 Sullins PTC36CAANspacing, (36-pin strip)
Inductor, SMT, 33-uH, 4.34, 12.3mm x2 L1, L2 Coilcraft MSS1260T-33354.9-m 12.3mm
Resistor, chip, 12.1-k ,1 R1 0603 Std Std1/16W, 1%
Resistor, chip, 68.1-k ,1 R2 0603 Std Std1/16W, 1%
Resistor, chip, 20-k ,2 R3, R4 0603 Std Std1/16W, 1%
Resistor, chip, 33.2-k ,1 R5 0603 Std Std1/16W, 1%
1 U1 IC, TPIC74100QPWPRQ1 TI TPIC74100QPWP
PCB, 2.3-inch x 2.3-inch x
Any TPIC74100, REV C0.062
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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 .
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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.
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of –0.3 V to 48 V and the output voltage range of 0.9 V to 18 V.
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 60 °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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