- 您現在的位置：買賣IC網 > PDF目錄98283 > TPS5602IDBTRG4 (TEXAS INSTRUMENTS INC) 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 PDF資料下載
參數資料
| 型號： | TPS5602IDBTRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 |
| 封裝： | GREEN, PLASTIC, TSSOP-30 |
| 文件頁數： | 6/27頁 |
| 文件大小： | 949K |
| 代理商： | TPS5602IDBTRG4 |
第1頁第2頁第3頁第4頁第5頁當前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁
TPS5602
DUAL, FAST, HIGH EFFICIENCY CONTROLLER FOR DSP POWER
SLVS217 – JUNE 1999
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
application for DSP power (continued)
sequencing and under voltage protection
The EVM design uses the standby pins to implement power sequencing. There are two ways to achieve the
protection: one uses a voltage supervisory circuit such as the TI TPS3305-18, the other uses a low cost
comparator, such as the TI TLV1391. The standby pin for the second channel is pulled low by either the
supervisory circuit or the external protection comparator until the first channel output voltage is above the
start-up threshold voltage. With the protection hysteresis, during the power down, if the core voltage is lower
than, for example, 1.3 V, the 3.3 output will be pulled down together. During the normal operation, if the core
voltage is lost, the I/O voltage will be pulled down at the same time. This protection circuit prevents the DSPs
from any damage caused by the malfunctioning power supply. The equation displayed below uses the
comparator for the protection setpoint:
Assuming R16 is much larger than R17, and R19 is 10 k
, and the R13 value is adjusted for the turnon setpoint:
R13
+
(Von
* 1.2)
R16
R19
1.2
Where Von is the required turn on setpoint. For the turn-off setpoint, R16 is adjusted,
R16
+
R13
R19
(1.2
* Vin)
R19
(Voff
* 1.2) * 1.2
R13
By solving these equations together, or using a spreadsheet to iterate, the setpoints can be easily derived. The
two equations are used for the verification:
Von
+
1.2
(R13
) R16 R19
R16
R19
and
Voff
+ R13
1.2
* Vin
R16
) 1.2
R19
) 1.2
R13
Where Von and Voff are the turnon and turnoff setpoints respectively
Example can be found by using the numbers in the bill of materials.
layout considerations
Good power supply results will only occur when care is given to proper design and layout. Layout will affect noise
pickup and generation and can cause a good design to perform with less than expected results. With a range
of currents from milliamps to tens or even hundreds of amps, good power supply layout is much more difficult
than most general PCB designs. The general design should proceed from the switching node to the output, then
back to the driver section and, finally, placing the low-level components. Below are several specific points to
consider before layout of a TPS5602 design begins.
D All sensitive analog components should be referenced to ANAGND. These include components connected
to Vref5, Vref, INV, LH, and COMP.
D Analog ground and drive ground should be isolated as much as possible. Ideally, analog ground will connect
to the ground side of the bulk storage capacitors on VO, and drive ground will connect to the main ground
plane close to the source of the low-side FET.
D Connections from the drivers to the gate of the power FETs should be as short and wide as possible to
reduce stray inductance. This becomes more critical if external gate resistors are not being used.
D The bypass capacitor for VCC should be placed close to the TPS5602.
相關PDF資料 |
PDF描述 |
|---|---|
| TPS5602IDBTR | 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS561000PWP | 1.4 A SWITCHING CONTROLLER, PDSO28 |
| TPS56100PWPR | 1.4 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS56100PWPRG4 | 1.4 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS56121DQPT | SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO22 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS56100EVM-128 | 功能描述:HIGH-PERFORMANCE SYNCHRONOUS BUC RoHS:是 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| TPS56100EVM-133 | 功能描述:HIGH-PERFORMANCE SYNCHRONOUS BUC RoHS:是 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| TPS56100PWP | 功能描述:DC/DC 開關控制器 5 Bit Programmable Sync Buck Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS56100PWPG4 | 功能描述:DC/DC 開關控制器 5 Bit Programmable Sync Buck Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS56100PWPR | 功能描述:DC/DC 開關控制器 5B Programmable Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
發布緊急采購，3分鐘左右您將得到回復。