欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: FAN5231QSC
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩壓器
英文描述: Analog IC
中文描述: 0.34 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28
封裝: PLASTIC, QSOP-28
文件頁數: 6/17頁
文件大小: 360K
代理商: FAN5231QSC
FAN5231
6
REV. 1.1.1 8/15/01
Functional Pin Description
VID0, VID1, VID2, VID3, VID4 (Pins 11, 10, 9, 8
and 7 respectively)
VID0-VID4 are the input pins to the 5-bit DAC. The states of
these five pins program the internal voltage reference
(DACOUT). The level of DACOUT sets the core converter
output voltage (V
OUT1
). It also sets the core PGOOD, UVP
and OVP thresholds.
BOOT1, BOOT2 (Pins 25 and 3)
These pins provide power to the upper MOSFET drivers of
the core and I/O converters. Connect these pins to their
respective junctions of the bootstrap capacitors and the cath-
odes of the bootstrap diodes. The anodes of the bootstrap
diodes are connected to pin 28, VCC.
PHASE1, PHASE2 (Pins 23 and 5)
The PHASE nodes are the junction points of the upper MOS-
FET sources, output filter inductors, and lower MOSFET
drains. Connect the PHASE pins to the respective PWM con-
verter’s upper MOSFET source.
ISEN1, ISEN2 (Pins 22 and 6)
These pins are used to monitor the voltage drop across the
lower MOSFETs for current feedback, output voltage droop
and over-current protection. For precise current detection
these inputs could be connected to optional current sense
resistors placed in series with sources of the lower MOS-
FETs. To set the gain of the current sense amplifier, a resistor
should be placed in series with each of these inputs.
UGATE1, UGATE2 (Pins 24 and 4)
These pins provide the gate drive for the upper MOSFETs.
LGATE1, LGATE 2 (Pin 27 and 1)
These pins provide the gate drive for the lower MOSFETs.
PGND1, PGND2 (Pin 26 and 2)
These are the power ground connection for the core and I/O
converters, respectively. Tie each lower MOSFET source to
the corresponding pin.
VSEN2 (Pin 12)
This pin is connected to the I/O output and provides voltage
feedback to the I/O error amplifier. The PGOOD, UVP and
OVP comparators use this signal.
V3IN (Pin 13)
This pin provides input power for the 2.5V linear regulator.
The typical input voltage for that pin is 3.3V. Alternatively,
5.0V system rail can be used while efficiency will be propor-
tionally lower.
VOUT3 (Pin 14)
Output of the 2.5V linear regulator. Supplies current up to
150mA. The output current on this pin is internally limited to
250mA.
VSEN1, VRTN1 (Pins 17 and 16)
These pins are connected to the core converter’s output volt-
age to provide remote sensing. The PGOOD, UVP and OVP
comparators use this pins for protection.
SOFT (Pin 18)
Connect a capacitor from this pin to the ground. This capaci-
tor (typically 0.1mF), along with an internal 25μA current
source, sets the soft-start interval of the converter. When
voltage on this pin exceeds 0.9V, the soft start is completed.
After the soft-start is completed, the pin function is changed.
The internal circuit regulates voltage on this pin to the value
commanded by VID code. The pin now has 500μA source/
sink capability that allows to set desired slew rate for upward
and downward VID code changes.
VIN (Pin 19)
VIN provides battery voltage to the oscillator for feed-for-
ward rejection of input voltage variations.
EN (Pin 20)
This pin enables IC operation when left open or pulled-up to
VCC. Also, it unlatches the chip after fault when being
cycled.
PGOOD (Pin 21)
PGOOD is an open drain output used to indicate the status of
the PWM converters’ output voltages. This pin is pulled low
when the core output is not within ±10% of the DACOUT
reference voltage, or when any of the other outputs are not
within their respective under-voltage and over-voltage
thresholds.
The PGOOD output is pulled low for “01111” and ‘11111’
VID code. See Table 1.
GND (Pin 15)
Signal ground for the IC. All voltage levels are measured
with respect to this pin.
VCC (Pin 28)
Supplies all the power necessary to operate the chip. The IC
starts to operate when the voltage on this pin exceeds 4.5V
and shuts down when the voltage on this pin drops below
4.0V.
相關PDF資料
PDF描述
FAN5232 Adjustable PWM Buck Controller for LCD PCs
FAN5232MTC SMPS Controller
FAN5233 System Electronics Regulator for Mobile PCs
FAN5233MTC Analog IC
FAN5233MTCX Analog IC
相關代理商/技術參數
參數描述
FAN5231QSCX 功能描述:開關變換器、穩壓器與控制器 QSOP-28 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
FAN5232 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Adjustable PWM Buck Controller for LCD PCs
FAN5232_CBC3116B WAF 制造商:Fairchild Semiconductor Corporation 功能描述:
FAN5232MTC 功能描述:DC/DC 開關控制器 DC/DC 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
FAN5232MTC_NL 功能描述:開關變換器、穩壓器與控制器 ANG FG 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
主站蜘蛛池模板: 蓝山县| 义乌市| 利川市| 敦化市| 武隆县| 营山县| 长沙县| 临沂市| 三河市| 贵德县| 利辛县| 玉门市| 仪征市| 云安县| 大埔区| 浙江省| 徐汇区| 都匀市| 大城县| 育儿| 勃利县| 炎陵县| 江津市| 合山市| 独山县| 汤阴县| 西华县| 莆田市| 玉环县| 衡水市| 阿合奇县| 晋城| 西和县| 惠来县| 漠河县| 青海省| 阿尔山市| 宝山区| 广宁县| 高邑县| 老河口市|