English dropdown-ico

Texas Instruments SLVP089 manual

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of Texas Instruments SLVP089, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Texas Instruments SLVP089 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of Texas Instruments SLVP089. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of Texas Instruments SLVP089 should contain:
- informations concerning technical data of Texas Instruments SLVP089
- name of the manufacturer and a year of construction of the Texas Instruments SLVP089 item
- rules of operation, control and maintenance of the Texas Instruments SLVP089 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Texas Instruments SLVP089 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Texas Instruments SLVP089, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Texas Instruments service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Texas Instruments SLVP089.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the Texas Instruments SLVP089 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

    1998 Mixed-Signal Linear Products User ’ s Guide[...]

  • Page 2

    Printed in U.S.A. 07/98 SL VU001A[...]

  • Page 3

    SL VP089 Synchronous Buck Converter Evaluation Module User ’ s Guide Printed on Recycled Paper Literature Number: SL VU001A July 1998[...]

  • Page 4

    IMPORT ANT NOTICE T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify , before placing orders, that information being relied on is current and complete. All product[...]

  • Page 5

    Related Documentation From T exas Instruments iii Read This First Preface Read This First About This Manual This user ’ s guide is a reference manual for the SL VP089 Synchronous Buck Converter Evaluation Module used to evaluate the performance of the TL5001 PWM Controller . This document provides information to assist managers and hardware engin[...]

  • Page 6

    If Y ou Need Assistance iv If Y ou Need Assistance . . . If you want to . .. Contact T exas Instruments at . . . Visit TI online World Wide W eb: http://www .ti.com Request more information World Wide W eb: http://www .ti.com/sc/docs/pic/home.htm about T exas Instruments Mixed Signal Products (MSP) Call the Product Information Center (PIC) hotline:[...]

  • Page 7

    Running Title — Attribute Reference v Chapter Title — Attribute Reference Contents 1 Hardware 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Introduction 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 8

    Running Title — Attribute Reference vi Figures 1 – 1 T ypical Synchronous Buck Converter 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 2 Schematic Diagram 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 3 Input/Out[...]

  • Page 9

    1-1 Chapter Title — Attribute Reference Hardware The SL VP089 Synchronous Buck Converter Evaluation Module (SL VP089) provides a method for evaluating the performance of the TL5001 pulse-width- modulation (PWM) controller . The device contains all of the circuitry necessary to control a switch-mode power supply in a voltage-mode configuration. Th[...]

  • Page 10

    Introduction 1-2 1.1 Introduction Synchronous buck converters provide the smaller size and higher efficiency required by electronic equipment, particularly portable battery-operated equipment. The synchronous buck converter reduces power losses associated with a standard buck converter by substituting a power MOSFET for the commutating diode. This [...]

  • Page 11

    Schematic 1-3 Hardware 1.2 Schematic Figure 1 – 2. Schematic Diagram DTC COMP R9 RT OUT SCP GND V CC 6 3 4 7 R9 1 5 FB + C1 µ 1F R2 C3 0.0022 µ F C2 0.033 µ F R8 C9 0.22 µ F C15 µ 1.0 F R6 2 8 U1 TL5001 1IN 2OUT GND V CC 2 4 5 7 2IN 3 1OUT V DD REG 8 6 1 R10 R13 IRF7201 NMOS Q2 U2 TPS2812 C14 0.1 µ F CR3 BAS16ZX C1 1 0.47 µ F C5 100 µ F C[...]

  • Page 12

    Input/Output Connections 1-4 1.3 Input/Output Connections Figure 1 – 3 shows the input/output connections to the SL VP089. Figure 1 – 3. Input/Output Connections C5 Q1 Q2 TL5001 +3.3V , 3 AMP SYNC. RECT BUCK U2 R5 R7 R13 C6 C1 1 C10 L1 J1 J2 R12 CR3 CR2 R1 1 C14 R6 R10 JMP1 C12 C8 C13 TEXAS INSTRUMENTS C15 R4 R3 C4 C3 R1 R9 R8 C9 C1 SL VP089 EV[...]

  • Page 13

    Board Layout 1-5 Hardware 1.4 Board Layout Figure 1 – 4 shows the SL VP089 board layout. Figure 1 – 4. Board Layout C5 Q1 Q2 TL5001 +3.3V , 3 AMP SYNC. RECT BUCK U2 R5 R7 R13 C6 C1 1 C10 L1 J1 J2 R12 CR3 CR2 R1 1 C14 R6 R10 JMP1 C12 C8 C13 TEXAS INSTRUMENTS C15 R4 R3 C4 C3 R1 R9 R8 C9 C1 SL VP089 EV AL BOARD REV2 R2 C2 U1 CR1 1 1[...]

  • Page 14

    Bill of Materials 1-6 1.5 Bill of Materials T able 1 – 1 lists materials required for the SL VP089. T able 1 – 1. Bill of Materials Qty Reference Part Number Mfr Description 1 C1 ECS-T1CY105R Panasonic Capacitor , T ant, 1 F , 20%, A Case 1 C1 1 Standard Capacitor , Cer , 0.47 F , 10%, X7R, 1210 1 C13 C3225Y5V1C106Z TDK Capacitor , Cer , 10 F ,[...]

  • Page 15

    T est Results 1-7 Hardware 1.6 T est Results T ables 1 – 2 and 1 – 3, along with Figures 1 – 5 through 1 – 8, show the test results for the SL VP089. T able 1 – 2. Line/Load Regulation, 3.3-V (T otal V ariation) Line/Load 0.3 A 0.9 A 1.5 A 3.0 A 5.0 A Load Reg. 5.5 V V o(V) 3.330 3.329 3.328 3.324 3.320 0.18% 6.0 V V o(V) 3.330 3.329 3.32[...]

  • Page 16

    T est Results 1-8 Figure 1 – 6. Power Switch T urn-On and Delay from Q2 Off V CC = 12 V I O = 1.5 A Q1 DRAIN 5 V/DIV Q2 GA TE 5 V/DIV 20 ns/Div 1 2 Figure 1 – 7. Power Switch T urn-Off and Delay to Q2 On V CC = 12 V I O = 1.5 A Q1 Drain 5 V/Div Q2 Gate 5 V/Div 1 2 20 ns/Div[...]

  • Page 17

    T est Results 1-9 Hardware Figure 1 – 8. Inductor and Output Ripple V CC = 12 V I O = 1.5 A Inductor Ripple 1 A/Div Output Ripple 20 mV/Div 2 µ s/Div 1 – DC 2 – AC[...]

  • Page 18

    1-10[...]

  • Page 19

    2-1 Chapter Title — Attribute Reference Design Procedure There are many possible ways to proceed when designing power supplies. This chapter shows the procedure used in the design of the SL VP089. The chapter includes the following topics: T opic Page 2.1 Introduction 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 20

    Introduction 2-2 2.1 Introduction The SL VP089 is a dc-dc synchronous buck converter module that provides a 3.3-V output at up to 3 A with an input voltage range of 5.5 V to 12 V . The PWM controller is a TL5001 operating at a nominal frequency of 100 kHz. The TL5001 is configured for a maximum duty cycle of 100 percent and has short- circuit prote[...]

  • Page 21

    Operating Specifications 2-3 Design Procedure 2.2 Operating Specifications T able 2 – 1 lists the operating specifications for the SL VP089. T able 2 – 1. Operating Specifications Specification Min Ty p Max Units Input V oltage Range 5.5 12 V Output V oltage Range 3.10 3.30 3.50 V Output Current Range 0 3 A Operating Frequency 100 kHz Output Ri[...]

  • Page 22

    Design Procedures 2-4 2.3 Design Procedures Detailed steps in the design of a buck-mode converter may be found in Designing With the TL5001C PWM Controller (literature number SL V A034) from TI. This section shows the basic steps involved in this design. 2.3.1 Duty Cycle Estimate The duty cycle for a continuous-mode step-down converter is approxima[...]

  • Page 23

    Design Procedures 2-5 Design Procedure The power dissipation (conduction + switching losses) can be approximated as: P D I 2 O r DS ( ON ) D 0.5 V I I O t r f f Assuming total switching time, t r+f , = 100 ns, a 55 ° C maximum ambient tem- perature, and r DS(ON) adjustment factor = 1.6, then: P D 3 2 (0.04 1.6) 0.64 0.5 5.5 3 0.1 10 – 6 100 10 3[...]

  • Page 24

    Design Procedures 2-6 2.3.6 Controller Functions The controller functions, oscillator frequency , soft-start, dead-time-control, short-circuit protection, and sense-divider-network are discussed in this sec- tion. The oscillator frequency is set by selecting the resistance value from the graph in figure 6 of the TL5001 data sheet. For 100 kHz, a va[...]

  • Page 25

    Design Procedures 2-7 Design Procedure Calculating the pulse-width-modulator gain as the change in output voltage divided by the change in PWM input voltage gives: A PWM V O V COMP 9 – 0 1.3 – 0.65 13.85 22.8 db The LC filter has a double pole at: 1 2 LC 1 2 21.6 H 168 F 2.64 kHz (worst case values) and rolls off at 40-dB per decade after that [...]

  • Page 26

    Design Procedures 2-8 Figure 2 – 2. Compensation Network _ + C4 R3 R4 C3 C2 R2 V ref V O V I The transfer function for this circuit is: V O V I [1 sR 2 (C 2 C 3 )] [ 1 sC 4 (R 3 R 4)] sC 2 R 4 [ 1 sC 3 R 2 ][ 1 sC 4 R 3] f Z1 f Z2 f P1 f P2 f P 3 The desired output regulation is ± 6 percent total deviation. The PWM control- ler tolerance is ± 5[...]

  • Page 27

    Design Procedures 2-9 Design Procedure Figure 2 – 3 shows the bode plot for the compensation network. Figure 2 – 3. Bode Plot 25 20 10 0 Gain – dB (Solid) 30 40 Frequency – Hz 45 35 15 90 70 50 30 10 – 10 – 30 – 50 – 90 Phase – Degrees (Dashed) 10 10 2 10 3 10 4 10 5 5 – 70 Note from the output response shown in Figure 2 – 4 t[...]

  • Page 28

    2-10[...]