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參數(shù)資料
| 型號： | FSBH0170NYF116 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.9 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | GREEN, MS-001BA, DIP-8 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大小： | 771K |
| 代理商： | FSBH0170NYF116 |
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSBH0170_F116, FSBH0270_F116, FSBH0370_F116 Rev. 1.0.0
12
FSB
H
0170_F116,
FSB
H
0
270_F116,
FSB
H
0370_F116
—
Green
M
ode
Fairchild
Power
Swit
ch
(
F
PS)
Green-Mode Operation
The FSBH-series uses feedback voltage (VFB) as an
indicator of the output load and modulates the PWM
frequency, as shown in Figure 28, such that the
switching frequency decreases as load decreases. In
heavy-load conditions, the switching frequency is
100kHz. Once VFB decreases below VFB-N (2.5V), the
PWM frequency starts to linearly decrease from 100kHz
to 18kHz to reduce switching losses. As VFB decreases
below VFB-G (2.0V), the switching frequency is fixed at
18kHz and the FSBH-series enters “deep” green mode to
reduce the standby power consumption.
Figure 28.
PWM Frequency
As VFB decreases below VFB-ZDC (1.6V), the FSBH-
series enters burst-mode operation. When VFB drops
below VFB-ZDC, FSBH-series stops switching and the
output voltage starts to drop, which causes the
feedback voltage to rise. Once VFB rises above VFB-ZDC,
switching resumes. Burst mode alternately enables and
disables switching, thereby reducing switching loss to
improve power saving, as shown in Figure 29.
Figure 29. Burst-Mode Operation
H/L Line Over-Power Compensation
To limit the output power of the converter constantly,
high/low line over-power compensation is included.
Sensing the converter input voltage through the VIN pin,
the high/low line compensation function generates a
relative peak-current-limit threshold voltage for constant
power control, as shown in Figure 30.
Figure 30.
Constant Power Control
Protections
The FSBH-series provides full protection functions to
prevent the power supply and the load from being
damaged. The protection features include:
Latch/Auto-Recovery Function
Besides the brownout protection and high/low line over-
power
compensation,
the
FSBH0X70_F116
has
additional protections via the VIN pin, such as pull-
HIGH latch and pull-LOW auto-recovery that depends
on the application. As shown in Figure 31, when VIN
level is higher than 4.7V, FSBH-series is latched until
the VDD is discharged. FSBH-series is auto-recovery
when the VIN level is lower than 0.3V.
Figure 31.
VIN Pin Function
Open-Loop / Overload Protection (OLP)
When the upper branch of the voltage divider for the
shunt regulator (KA431 shown) is broken, as shown in
Figure 32, or over current or output short occurs, there
is no current flowing through the opto-coupler transistor,
which pulls the feedback voltage up to 6V.
When feedback voltage is above 4.6V for longer than
56ms, OLP is triggered. This protection is also triggered
when the SMPS output drops below the nominal value
longer than 56ms due to the overload condition.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FSBH0270NYF116 | 1.1 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, PDIP8 |
| FSBH0370NYF116 | 1.3 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, PDIP8 |
| FSBH0370NY_F116 | 1.3 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, DIP8 |
| FSBH0270NY_F116 | 1.1 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, DIP8 |
| FSBH0170NY_F116 | 0.9 A SWITCHING CONTROLLER, 106 kHz SWITCHING FREQ-MAX, DIP8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FSBH0170W | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPSa?￠) |
| FSBH0170WNY | 功能描述:電源開關(guān) IC - 配電 1A/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 |
| FSBH0270 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch |
| FSBH0270/A | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPS?) |
| FSBH0270A | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Green Mode Fairchild Power Switch (FPS?) |
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