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부품번호 | FSBH0F70A 기능 |
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기능 | Green Mode Fairchild Power Switch | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 16 페이지수
April 2010
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370
Green Mode Fairchild Power Switch (FPS™)
Features
Brownout Protection with Hysteresis
Built-In 5ms Soft-Start Function
Internal Avalanche-Rugged 700V SenseFET
No Acoustic Noise During Light-Load Operation
High-Voltage Startup
Linearly Decreasing PWM Frequency to 18KHz
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 switch-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 700V SenseFET. It is
specifically designed for high-performance offline
Switch 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 18kHz. 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 1.6V, which allows
an operating current of only 2.5mA.
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 90VAC to 264VAC.
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 28V,
the internal OVP circuit is triggered.
Compared with a discrete MOSFET and controller or
RCC switching converter solution, the FSBH-series
reduces total 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.
© 2009 Fairchild Semiconductor Corporation
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3
www.fairchildsemi.com
Pin Configuration
8
ZXYTT
BH0F70A
TPM
1
8
ZXYTT
BH0270A
TPM
1
8
ZXYTT
BH0170A
TPM
1
8
ZXYTT
BH0170
TPM
1
F – Fairchild Logo
Z – Plant Code
X – 1-Digit Year Code
Y – 1-Digit Week Code
TT – 2-Digit Die Run Code
T – Package Type (N:DIP)
P – Y: Green Package
M – Manufacture Flow Code
8
ZXYTT
BH0270
TPM
1
8
ZXYTT
BH0370
TPM
1
Figure 4. Pin Configuration and Top Mark Information
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
GND
VDD
FB
VIN
NC
HV
Drain
Drain
Drain
Description
Ground. SenseFET source terminal on primary side and internal controller ground.
Power Supply. The internal protection circuit disables PWM output as long as VDD exceeds the
OVP trigger point.
Feedback. The signal from the external compensation circuit is fed into this pin. The PWM duty
cycle is determined in response to the signal on this pin and the internal current-sense signal.
Line-Voltage Detection. The line-voltage detection is used for brownout protection with
hysteresis and constant output power limit over universal AC input range. This pin has additional
protections that are pull-HIGH latch and pull-LOW auto recovery, depending on the application.
No Connection for FSBH0F70A, FSBH0170A and FSBH0270A.
Startup. For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors.
SenseFET Drain. High-voltage power SenseFET drain connection.
SenseFET Drain. High-voltage power SenseFET drain connection.
SenseFET Drain. High-voltage power SenseFET drain connection.
© 2009 Fairchild Semiconductor Corporation
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3
4
www.fairchildsemi.com
4페이지 Electrical Characteristics (Continued)
VDD=15V and TA=25°C unless otherwise specified.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
Control Section
VDD Section
VDD-ON Start Threshold Voltage
11 12 13
V
VDD-OFF Minimum Operating Voltage
7 8 9V
IDD-ST
Startup Current
FSBH0170
FSBH0270
FSBH0370
FSBH0F70A
FSBH0170A
FSBH0270A
VDD-ON – 0.16V
VDD-ON – 0.16V
30
240 320 400
µA
IDD-OP
Operating Supply Current
VDD = 15V, VFB = 3V 3.0 3.5 4.0 mA
IDD-ZDC
Operating Current for VFB<VFB-ZDC
VDD = 12V, VFB = 1.6V 1.5
2.5
3.5
mA
IDD-OLP
VTH-OLP
Internal Sink Current
IDD-OLP Off Voltage
VTH-OLP+0.1V
30 70 90 µA
5 6 7V
VDD-OVP VDD Over-Voltage Protection
27 28 29
V
tD-VDD-OVP
VDD Over-Voltage Protection
Debounce Time
75 130 200 µs
HV Section
IHV
Maximum Current Drawn from HV Pin
HV 120VDC,
VDD = 0V with 10µF
1.5 3.5 5.0 mA
IHV-LC
Leakage Current after Startup
HV = 700V,
VDD = VDD-OFF+1V
1 20 µA
Oscillator Section
fOSC
fOSC-G
DMAX
fDV
fDT
Frequency in Nominal Mode
Green-Mode Frequency
Maximum Duty Cycle
Frequency Variation vs. VDD Deviation
Frequency Variation vs. Temperature
Deviation(10)
Center Frequency
VDD = 11V to 22V
TA = -25 to 85°C
94 100 106 kHz
14 18 22 kHz
85 %
5%
5%
VIN Section (FSBH0170, FSBH0270, FSBH0370)
VIN-ON
PWM Turn-On Threshold Voltage
VIN-OFF PWM Turn-Off Threshold Voltage
tIN-OFF
VIN-H
tIN-H
VIN-L
PWM Turn-Off Debounce Time
Pull-HIGH Latch Trigger Level
Pull-HIGH Latch Debounce Time
Pull-LOW Auto-Recovery Trigger
Level
Feedback Input Section
AV
FB Voltage to Current-Sense
Attenuation
ZFB Input Impedance
1.08
VIN-ON –
0.48
4.4
0.2
1.13
VIN-ON –
0.54
500
4.7
100
0.3
1.18
VIN-ON –
0.60
5.0
0.4
V
V
ms
V
µs
V
1/4.5
4
1/4.0
1/3.5
7
V/V
kΩ
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3
7
www.fairchildsemi.com
7페이지 | |||
구 성 | 총 16 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
FSBH0F70A | Green Mode Fairchild Power Switch | Fairchild Semiconductor |
FSBH0F70A | Green Mode Fairchild Power Switch | Fairchild Semiconductor |
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