- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄68994 > FAN6754BMLMY (FAIRCHILD SEMICONDUCTOR CORP) SWITCHING CONTROLLER, 69 kHz SWITCHING FREQ-MAX, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | FAN6754BMLMY |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 69 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, MS-012AA, SOP-8 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大小： | 869K |
| 代理商： | FAN6754BMLMY |
2011 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6754B Rev.1.0.0
12
FAN6754B
—
Highly
Integrated
Green-Mo
de
PWM
Controller
The HV pin can perform current limit to shrink the
tolerance of Over-Current Protection (OCP) under full
range of AC voltage, to linearly current limit curve, as
shown in 0. FAN6754B also shrinks the Vlimit level by
half to lower the I
2RSENSE loss to increase the heavy-
load efficiency.
Figure 25. Linearly Current Limit Curve
VDD Over-Voltage Protection (OVP)
VDD over-voltage protection prevents damage due to
abnormal conditions. If the VDD voltage is over the over-
voltage protection voltage (VDD-OVP) and lasts for tD-
VDDOVP, the PWM pulses are disabled until VDD drops
below the UVLO, then starts again. Over-voltage
conditions are usually caused by open feedback loops.
Thermal Protection
An NTC thermistor, RNTC, in series with resistor RA, can
be connected from the RT pin to ground. A constant
current, IRT, is output from the RT pin. The voltage on
the RT pin can be expressed as VRT=IRT (RNTC + RPTC),
where IRT is 100A. At high ambient temperature, RNTC
is smaller, such that VRT decreases. When VRT is less
than 1.035V (VRTTH1), the PWM turns off after 16ms
(tD-OTP1). If VRT is less than 0.7V (VRTTH2), the PWM turns
off after 185s (tD-OTP2). If the RT pin is not connected to
NTC
resistor
for
over-temperature
protection,
connecting a series one 100K剸 resistor to ground to
prevent from noise interference is recommended. This
pin is limited by an internal clamping circuit.
Limited Power Control
The FB voltage increases every time the output of the
power supply is shorted or overloaded. If the FB voltage
remains higher than a built-in threshold for longer than
tD-OLP, PWM output is turned off. As PWM output is
turned off, VDD begins decreasing.
When VDD goes below the turn-off threshold (10V) the
controller is totally shut down and VDD is continuously
discharged to VDD-OLP (6.5V) by IDD-OLP to lower the
average input power. This is called two-level UVLO. VDD
is cycled again. This protection feature continues as
long as the overloading condition persists. This prevents
the power supply from overheating due to overloading
conditions.
Noise Immunity
Noise on the current sense or control signal may cause
significant pulse-width jitter, particularly in continuous-
conduction mode. Slope compensation helps alleviate
this problem. Good placement and layout practices
should be followed. Avoiding long PCB traces and
component leads, locating compensation and filter
components near the FAN6754B, and increasing the
power MOS gate resistance improve performance.
0.38
0.39
0.4
0.41
0.42
0.43
0.44
0.45
0.46
0.47
100 120 140 160 180 200 220 240 260 280 300 320 340 360 380
DC Voltage on HV Pin (V)
V
lim
it
(V
)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN6793NY | DUAL SWITCHING CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDIP16 |
| FAN6793MY | DUAL SWITCHING CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDSO16 |
| FAN6862HTY | SWITCHING CONTROLLER, 104.5 kHz SWITCHING FREQ-MAX, PDSO6 |
| FAN6862NY | SWITCHING CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDIP8 |
| FAN6863LTY | SWITCHING CONTROLLER, PDSO6 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN6754BMRMY | 功能描述:電壓模式 PWM 控制器 Hi-Integrated Green Mode PWM Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(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 |
| FAN6754KLMY | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN6754MLMY | 功能描述:IC CTLR PWM GREEN MODE 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器，離線開關(guān) 系列:- 標準包裝:1 系列:FPS™ 輸出隔離:隔離 頻率范圍:61kHz ~ 73kHz 輸入電壓:8 V ~ 26 V 輸出電壓:650V 功率（瓦特）:12W 工作溫度:-40°C ~ 115°C 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-MDIP 包裝:Digi-Reel® 其它名稱:FSL206MRBNFSDKR |
| FAN6754MLMY_F116 | 制造商:Fairchild Semiconductor Corporation 功能描述:IC |
| FAN6754MRMY | 功能描述:IC CTLR PWM GREEN MODE 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器，離線開關(guān) 系列:- 標準包裝:1 系列:FPS™ 輸出隔離:隔離 頻率范圍:61kHz ~ 73kHz 輸入電壓:8 V ~ 26 V 輸出電壓:650V 功率（瓦特）:12W 工作溫度:-40°C ~ 115°C 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-MDIP 包裝:Digi-Reel® 其它名稱:FSL206MRBNFSDKR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。