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PDF ( 数据手册 , 数据表 ) FSBH0170

零件编号 FSBH0170
描述 Green Mode Fairchild Power Switch
制造商 Fairchild Semiconductor
LOGO Fairchild Semiconductor LOGO 


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FSBH0170 数据手册, 描述, 功能
June 2013
FSBH0F70A _F116, FSBH0170_F116,
FSBH0270_F116, FSBH0370_F116
Green Mode Fairchild Power Switch (FPS™)
Features
Brownout Protection with Hysteresis
Built-In 5 ms Soft-Start Function
Internal Avalanche-Rugged 700 V SenseFET
Low Acoustic Noise During Light-Load Operation
High-Voltage Startup
Linearly Decreasing PWM Frequency to 18 KHz
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking (LEB)
Synchronized Slope Compensation
Internal Open-Loop Protection
VDD Under-Voltage Lockout (UVLO)
VDD Over-Voltage Protection (OVP)
Internal Auto-Restart Circuit (OVP, OTP)
Constant Power Limit (Full AC Input Range)
Internal OTP Sensor with Hysteresis
VIN Pin for Pull-HIGH Latch Function and
Pull-LOW Auto-Recovery Protection
Applications
General-purpose switched-mode power supplies and
flyback power converters, including:
Auxiliary Power Supply for PC and Server
SMPS for VCR, SVR, STB, DVD & DVCD Player,
Printer, Facsimile, and Scanner
Adapter for Camcorder
Description
The highly integrated FSBH-series consists of an
integrated current-mode Pulse Width Modulator (PWM)
and an avalanche-rugged 700 V SenseFET. It is
specifically designed for high-performance offline
Switched-Mode Power Supplies (SMPS) with minimal
external components.
The integrated PWM controller features include a
proprietary green-mode function that provides off-time
modulation to linearly decrease the switching frequency
at light-load conditions to minimize standby power
consumption. To avoid acoustic-noise problems, the
minimum PWM frequency is set above 18 kHz. This
green-mode function enables the power supply to meet
international power conservation requirements. The
PWM controller is manufactured using the BiCMOS
process to further reduce power consumption. The
FSBH-series turns off some internal circuits to improve
power saving when VFB is lower than 1.6 V, which
allows an operating current of only 2.5 mA.
The FSBH-series has built-in synchronized slope
compensation to achieve stable peak-current-mode
control. The proprietary external line compensation
ensures constant output power limit over a wide AC
input voltage range, from 90 VAC to 264 VAC.
The FSBH-series provides many protection functions. In
addition to cycle-by-cycle current limiting, the internal
open-loop protection circuit ensures safety when an
open-loop or output short occurs. PWM output is
disabled until VDD drops below the VTH-OLP, then the
controller starts up again. As long as VDD exceeds 28 V,
the internal OVP circuit is triggered.
Compared with a discrete MOSFET and controller or
RCC switching converter solution, the FSBH-series
reduces component count, design size, and weight;
while increasing efficiency, productivity, and system
reliability. These devices provide a basic platform that is
well suited for the design of cost-effective flyback
converters, such as in PC auxiliary power supplies.
© 2010 Fairchild Semiconductor Corporation
FSBH0F70A_F116, FSBH0170/0270/0370_F116 • Rev. 1.0.2
1
www.fairchildsemi.com







FSBH0170 pdf, 数据表
Electrical Characteristics (Continued)
VDD=15 V and TA=25C unless otherwise specified.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
VFB-N
VFB-G
VFB-ZDC
VFB-OLP
Green-Mode Entry FB Voltage
Green-Mode Ending FB Voltage
Zero Duty Cycle FB Voltage
FB Open-Loop
Trigger Level
FSBH0F70A_F116
FSBH0x70_F116
2.3 2.5 2.7
1.9 2.0 2.1
1.6
5.2 5.4 5.6
4.4 4.6 4.8
V
V
V
V
tD-OLP
FB Open-Loop Protection Delay
Current-Sense Section(15)
50 56 59 ms
FSBH0F70A_F116 VIN Open
ILIM
Peak Current
Limit
FSBH0170_F116
FSBH0270_F116
VIN=1.2 V
VIN=1.2 V
FSBH0370_F116
VIN=1.2 V
tSS Period During Soft-Start Time(11)
0.63 0.73 0.83
0.70 0.80 0.90
0.90 1.00 1.10
A
1.10 1.20 1.30
4.5 5.0 5.5 ms
Constant Power Limit (FSBH0170, FSBH0270, FSBH0370)
VLMT1
VLMT2
Threshold Voltage 1 for Current Limit
Threshold Voltage 2 for Current Limit
VIN=1.2 V
VIN=3.6 V
0.73 0.80 0.87
0.56 0.63 0.70
V
V
Constant Power Limit (FSBH0F70A)
VLMT
Threshold Voltage for Current Limit
0.97 1.00 1.03
V
Over-Temperature Protection Section (OTP)
TOTP
TRESTART
Protection Junction Temperature(11,13)
Restart Junction Temperature(11,14)
+135
+142
TOTP-25
+150
°C
°C
Notes:
11. These parameters, although guaranteed, are not 100% tested in production.
12. Pulse test: pulse width 300 µs, duty 2%.
13. When activated, the output is disabled and the latch is turned off.
14. The threshold temperature for enabling the output again and resetting the latch after over-temperature protection
has been activated.
15. These parameters, although guaranteed, are tested in wafer process.
Figure 5. VFB vs. PWM Frequency
© 2010 Fairchild Semiconductor Corporation
FSBH0F70A_F116, FSBH0170/0270/0370_F116 • Rev. 1.0.2
8
www.fairchildsemi.com







FSBH0170 equivalent, schematic
© 2010 Fairchild Semiconductor Corporation
FSBH0F70A_F116, FSBH0170/0270/0370_F116 • Rev. 1.0.2
16
www.fairchildsemi.com










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