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參數(shù)資料
| 型號(hào)： | SP61346 |
| 英文描述： | Dual Supply Synchronous Buck Controller |
| 中文描述： | 雙電源同步降壓控制器 |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 188K |
| 代理商： | SP61346 |
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Date: 2/16/06
SP6134 Dual Supply, Synchronous Buck Controller Copyright 2006 Sipex Corporation
THEORY OF OPERATION: Continued
zero response is required, then compensation
can be a simple as an RC to ground. If a more
complex compensation is required, then the
amplifier has enough bandwidth (45
°
at 4 MHz)
and enough gain (60dB) to run Type III compen-
sation schemes with adequate gain and phase
margins at cross over frequencies greater than
50kHz.
The common mode output of the error amplifier
is 0.9V to 2.2V. Therefore, the PWM voltage
ramp has been set between 1.1V and 2.2V to
ensure proper 0% to 100% duty cycle capability.
The voltage loop also includes two other very
important features. One is an asynchronous start
up mode. Basically, the GL driver can not turn
on unless the GH driver has attempted to turn on
or the SS pin has exceeded 1.7V. This feature
prevents the controller from “dragging down”
the output voltage during startup or in fault
modes. The second feature is a 100% duty cycle
timeout that ensures synchronized refreshing of
the BST capacitor at very high duty ratios. In the
event that the GH driver is on for 20 continuous
clock cycles, a reset is given to the PWM flip
flop half way through the 21st cycle. This forces
GL to rise for the remainder of the cycle, in turn
refreshing the BST capacitor.
Gate Drivers
The SP6134 contains a pair of powerful 2
SOURCE and 1.5
SINK drivers. These state
of the art drivers are designed to drive external
NFETs capable of handling up to 30A. Rise,
fall, and non-overlap times have all been minized
to achieve maximum efficiency. All drive pins
GH, GL & SWN are monitored continuously to
ensure that only one external NFET is ever on at
any given time.
90%
10%
RISE TIME
2V
NON-OVERLAP
FALL TIME
2V
90%
10%
GH(GL)
GL(GH)
GATE DRIVER TEST CONDITIONS
V(BST)
GH
Voltage
V(VCC)
V(SWN)
GL
Voltage
V(VIN)
0V
-0V
-V(Diode) V
V(VIN)+V(VCC)
BST
Voltage
V(VCC)
TIME
SWN
Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6134HEU | High Voltage, 600 KHz Synchronous PWM Controller |
| SP6134H | High Voltage, 600 KHz Synchronous PWM Controller |
| SP6134HCU | High Voltage, 600 KHz Synchronous PWM Controller |
| SP6136 | Evaluation Board Manual |
| SP6136_06 | Evaluation Board Manual |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6134CU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Dual Supply Synchronous Buck Controller |
| SP6134CU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Dual Supply Synchronous Buck Controller |
| SP6134CU-L | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual-Supply Synchronous, Cntrllr RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6134CU-L/TR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual-Supply Synchronous, Cntrllr RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SP6134EB | 功能描述:電壓模式 PWM 控制器 Dual Supply Sync Buck Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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