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FSDM1265RB Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part No. FSDM1265RB
Description  Green Mode Fairchild Power Switch (FPS)
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FSDM1265RB Datasheet(HTML) 1 Page - Fairchild Semiconductor

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©2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev.1.0.0
FPSTM is a trademark of Fairchild Semiconductor Corporation.
Features
• Internal Avalanche Rugged Sense FET
• Advanced Burst-Mode operation that consumes less than
1 W at 240VAC and 0.5W load
• Precision Fixed Operating Frequency (66kHz)
• Internal Start-up Circuit
• Improved Pulse by Pulse Current Limiting
• Over-Voltage Protection (OVP)
• Over-Load Protection (OLP)
• Internal Thermal Shutdown Function (TSD)
• Auto-Restart Mode
• Under Voltage Lock Out (UVLO) with Hysteresis
• Low Operating Current (2.5mA)
• Built-in Soft Start
Application
• SMPS (Switch Mode Power Supplies) for LCD monitor
and STB
• Adapter
Description
The FSDM1265RB is an integrated Pulse-Width Modulator
(PWM) and a SenseFET which is specifically designed for
high performance offline SMPS with minimal external
components. This device is an integrated high-voltage power
switching regulator which combines a rugged avalanche
Sense FET with a current mode PWM control block. The
PWM controller includes integrated fixed frequency oscillator,
under-voltage lockout, leading edge blanking (LEB), optimized
gate driver, internal soft-start, and precise current sources that
are temperature compensated for loop compensation and self
protection circuitry. Compared with discrete MOSFET and
PWM controller solution, it can reduce total cost, component
count, size, and weight, while simultaneously increasing
efficiency, productivity, and system reliability. This device is a
basic platform which is well suited for cost effective designs
of flyback converters.
Table 1. Maximum Output Power
Notes:
1. Typical continuous power in a non-ventilated enclosed
adapter measured at 50
°C ambient.
2. Maximum practical continuous power in an open- frame
design at 50
°C ambient.
3. 230 VAC or 100/115 VAC with doubler.
4. The junction Temperature can limit the Maximum output power.
Typical Circuit
Figure 1. Typical Flyback Application
OUTPUT POWER TABLE(4)
PRODUCT
230VAC
±15%(3)
85-265VAC
Adapt-
er(1)
Open
Frame(2)
Adapt-
er(1)
Open
Frame(2)
FSDM0565RB
60W
70W
50W
60W
FSDM0565RBI
60W
70W
50W
60W
FSDM07652RB
70W
80W
60W
70W
FSDM1265RB
90W
110W
80W
90W
Drain
Source
Vstr
Vfb
Vcc
PWM
AC
IN
DC
OUT
FSDM1265RB
Green Mode Fairchild Power Switch (FPSTM)


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