參數(shù)資料
型號： TPS5103DB
廠商： Texas Instruments, Inc.
英文描述： MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
中文描述： 多模同步DC / DC控制器
文件頁數(shù)： 27/37頁
文件大?。?/td> 1052K
代理商： TPS5103DB
TPS5103
MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
SLVS240 – SEPTEMBER 1999
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
synchronization
Some applications require switching clock synchronization. Two methods are used for synchronization:
Triangle wave synchronization
TPS5103
Ct
Rt
740 mV
740 mV
Square wave synchronization
It can be seen that R
T
and C
T
are removed from the circuit. Therefore, two components are saved. This method
is good for the synchronization between two controllers. If the controller needs to be synchronized with digital
circuit such as DSP, usually the square-type clock signal is used. The configuration exhibited below is for this
type of application:
TPS5103
Ct
Rt
An external resistor is added into the circuit, but R
T
is still removed. C
T
is kept to be a part of RC circuit generating
triangle waveform for the controller. Assuming the peak value of the square is known, the resistor and the
capacitor can be adjusted to achieve the correct peak–to–peak value and the offset value.
layout guidelines
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, place the low-level components. Below are several specific points to
consider before layout of a TPS5103 design begins.
All sensitive analog components should be referenced to ANAGND. These include components connected
to Vref5, Vref, INV, LH, and COMP .
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 V
O
, and drive ground will connect to the main ground
plane close to the source of the low-side FET.
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TPS5103IDBR 功能描述:DC/DC 開關(guān)控制器 Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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