- 您現在的位置：買賣IC網 > PDF目錄98282 > TPS53851RHHT (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, PQCC36 PDF資料下載
參數資料
| 型號： | TPS53851RHHT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, PQCC36 |
| 封裝： | PLASTIC, VQFN-36 |
| 文件頁數： | 15/66頁 |
| 文件大小： | 1264K |
| 代理商： | TPS53851RHHT |
第1頁第2頁第3頁第4頁第5頁第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頁當前第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頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁
R+1.33
39.2
10
3
*1.041
PH
*7 ;
0
50
100
150
200
250
300
350
400
450
100
200
300
400
500
600
700
800
900 1000
Phase Switching Frequency kHz
Rt
T
iming
Resistor
k
W
PHASE FREQUENCY
vs
TIMING RESISTOR
SLUS985 – DECEMBER 2009
www.ti.com
5.20 SETTING THE SWITCHING FREQUENCY
The clock frequency is programmed by the value of the timing resistor connected from the RT pin to
ground. See Equation 5. This equation gives the frequency for an 8-phase system. For a 6-phase system
the frequency is 1 1/3 times higher.
(5)
Figure 5-6. Phase Switching Frequency vs RT
5.21 SYNCHRONIZING A SINGLE CONTROLLER TO AN EXTERNAL CLOCK
The TPS53851 has the ability to synchronize a single controller to an external clock. The clock must be a
pulse stream at 6 or 8 times the master PWM frequency. See Figure 5-7.
Synchronizing the single controller to an external clock is similar to synchronizing a clock slave to a clock
master. The single controller is put in clock slave mode by connecting the RT pin to BP5, disabling the
internal clock generator. If the external CLKIO signal is a clock stream without any missing pulses, the
master synchromizes to an arbitrary pulse so there is no determinant phase synchronization. Without a
missing pulse, the PWM frequency is 1/8 of the external clock. If the external CLKIO signal has a missing
pulse every 6 cycles or 8 cycles, the controller synchronizes based on the missing pulse which would be
in the 6th or 8th position. With the missing pulse, the phase synchronization of the master, to the missing
pulse, can be controlled by the voltage on the PHSEL pin. See the section on DIGITAL CLOCK
SYNCHRONIZATION. Phase shifting would also be desirable if more than one controller were to be
synchronized to the same external clock.
22
APPLICATION INFORMATION
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS53851
相關PDF資料 |
PDF描述 |
|---|---|
| TPS54010PWPG4 | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54040DGQ | 0.5 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54073PWPRG4 | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54073PWPR | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54073PWP | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS53915EVM-587 | 功能描述:TPS53915 SWIFT?, D-CAP3?, Eco-Mode? DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board 制造商:texas instruments 系列:SWIFT?，D-CAP3?，Eco-Mode? 零件狀態:有效 主要用途:DC/DC，步降 輸出和類型:1，非隔離 功率 - 輸出:- 電壓 - 輸出:1.2V 電流 - 輸出:12A 電壓 - 輸入:12V 穩壓器拓撲:降壓 頻率 - 開關:- 板類型:完全填充 所含物品:板 使用的 IC/零件:TPS53915 標準包裝:1 |
| TPS53915RVET | 制造商:Texas Instruments 功能描述:1.5V TO 18V INPUT (4.5V TO 25V BIAS), 12-A SYNCHRONOUS STEP- - Tape and Reel 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 12A 28VQFN |
| TPS5401 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:0.5-A, 42-V Input, Step-Down SWIFT? Converter |
| TPS54010 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SWIFT Converter Product Portfolio |
| TPS54010EVM-067 | 功能描述:電源管理IC開發工具 4.0 Vin DC/DC Conv RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
發布緊急采購，3分鐘左右您將得到回復。