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參數(shù)資料
| 型號： | FSBH0270NYF116 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | GREEN, MS-001BA, DIP-8 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大小： | 771K |
| 代理商： | FSBH0270NYF116 |
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSBH0170_F116, FSBH0270_F116, FSBH0370_F116 Rev. 1.0.0
11
FSB
H
0170_F116,
FSB
H
0
270_F116,
FSB
H
0370_F116
—
Green
M
ode
Fairchild
Power
Swit
ch
(
F
PS)
Functional Description
Startup Operation
The HV pin is connected to bulk voltage through an
external resistor, RHV, as shown in Figure 24. When AC
voltage is applied to the power system, an internal HV
startup circuit provides a high current (around 3.5mA) to
charge an external VDD capacitor until VDD voltage
exceeds the turn-on threshold voltage (VDD-ON). For
lower power consumption, the HV startup circuit shuts
down during normal operation. The external VDD
capacitor and auxiliary winding maintain the VDD voltage
and provide operating current to controller.
Figure 24.
Startup Circuit
Slope Compensation
The FSBH-series is designed for flyback power
converters. The peak-current-mode control is used to
optimize system performance. Slope compensation is
added to reduce current loop gain and improve power
system stability. The FSBH-series has a built-in,
synchronized, positive slope for each switching cycle.
Soft-Start
The FSBH-series has an internal soft-start circuit that
reduces the SenseFET switching current during power
system startup. The characteristic curve of soft-start
time versus VLMT level is shown in Figure 25. The VLMT
level rises in six steps. By doing so, the power system
can smoothly build up the rated output voltage and
effectively reduce voltage stress on the PWM switch
and output diode.
Figure 25.
Soft-Start Function
Brown-In/Out Function
FSBH0x70 has a built-in internal brown-in/out protection
comparator monitoring voltage of VIN pin. Figure 26
shows a resistive divider with low-pass filtering for line-
voltage detection on the VIN pin.
Figure 26.
Brown-In/Out Function on VIN Pin
Once the VIN pin voltage is lower than 0.6V and lasts
for 500ms, the PWM gate is disabled to protect the
system from over current. FSBH0x70 starts up as VIN
increases above 1.1V. Because the divider resistors of
the VIN pin are connected behind the bridge, the ratio
calculations for brownout in PFC and non-PFC system
are different, as shown in Figure 27. The formulas are
provided in the following equations:
Brownout with PFC:
_
2
20.6
C
AC OUT
AB
C
R
V
RR
R
π
=
++
(1)
Brownout with non-PFC:
_
20.6
C
AC OUT
AB
C
R
V
RR
R
=
++
(2)
Brown-in level is determined by:
_
1.1
2
A
BC
AC
IN
C
RR
R
V
R
++
=
(3)
Figure 27.
VIN Level According to PFC Operation
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FSBH0270W | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPSa?￠) |
| FSBH0270WNY | 功能描述:電源開關(guān) IC - 配電 2A/700V 100kHz SW RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| FSBH0370 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch |
| FSBH0370NY | 功能描述:IC OFF-LINE SWITCH PWM 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器，離線開關(guān) 系列:FPS™ 標(biāo)準(zhǔn)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 |
| FSBH0370NY_F116 | 功能描述:電源開關(guān) IC - USB 3A/700V 100kHz SW RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
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