Q0165R Datasheet PDF - Fairchild Semiconductor

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Q0165R
Fairchild Semiconductor

Part Number Q0165R
Description FSQ0165R
Page 24 Pages


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September 2007
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311
Green Mode Fairchild Power Switch (FPS™) for
Valley Switching Converter - Low EMI and High Efficiency
Features
„ Optimized for Valley Switching (VSC)
„ Low EMI through Variable Frequency Control and
Inherent Frequency Modulation
„ High-Efficiency through Minimum Voltage Switching
„ Narrow Frequency Variation Range over Wide Load
and Input Voltage Variation
„ Advanced Burst-Mode Operation for Low Standby
Power Consumption
„ Pulse-by-Pulse Current Limit
„ Various Protection Functions: Overload Protection
(OLP), Over-Voltage Protection (OVP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD)
„ Under-Voltage Lockout (UVLO) with Hysteresis
„ Internal Start-up Circuit
„ Internal High-Voltage SenseFET (650V)
„ Built-in Soft-Start (15ms)
Applications
„ Power Supply for DVP Player and DVD Recorder,
Set-Top Box
„ Adapter
„ Auxiliary Power Supply for PC, LCD TV, and PDP TV
Description
A Valley Switching Converter generally shows lower EMI
and higher power conversion efficiency than a
conventional hard-switched converter with a fixed
switching frequency. The FSQ-series is an integrated
Pulse-Width Modulation (PWM) controller and
SenseFET specifically designed for valley switching
operation with minimal external components. The PWM
controller includes an integrated fixed-frequency
oscillator, Under-Voltage Lockout, Leading Edge
Blanking (LEB), optimized gate driver, internal soft-start,
temperature-compensated precise current sources for
loop compensation, and self-protection circuitry.
Compared with discrete MOSFET and PWM controller
solutions, the FSQ-series reduces total cost, component
count, size and weight; while simultaneously increasing
efficiency, productivity, and system reliability. This device
provides a basic platform that is well suited for cost-
effective designs of valley switching fly-back converters.
Related Application Notes
„ AN-4137, AN-4141, AN-4147, AN-4150 (Flyback)
„ AN-4134 (Forward)
FPSTM is a trademark of Fairchild Semiconductor Corporation.
© 2006 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 Rev. 1.0.5
www.fairchildsemi.com
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Ordering Information
Product
Number(5)
PKG.
Operating
Temp.
Cur-
rent
Limit
FSQ311
FSQ311L
8-DIP
-40 to +85C
8-LSOP
0.6A
FSQ321
FSQ321L
8-DIP
-40 to +85°C 0.6A
8-LSOP
FSQ0165RN 8-DIP
-40 to +85°C 0.9A
FSQ0165RL 8-LSOP
FSQ0265RN 8-DIP
-40 to +85°C 1.2A
FSQ0265RL 8-LSOP
FSQ0365RN 8-DIP
-40 to +85°C 1.5A
FSQ0365RL 8-LSOP
RDS(ON)
Max.
Maximum Output Power(1)
230VAC±15%(2)
85-265VAC
Adapter(3) Open-Frame(4) Adapter(3) Open-Frame(4)
19Ω 7W 10W 6W 8W
Replaces
Devices
FSDL321
FSDM311
19Ω 8W
12W
7W
10W
FSDL321
FSDM311
10Ω 10W
15W
9W
13W
FSDL0165RN
6Ω 14W
4.5Ω
17.5W
20W
25W
11W
13W
16W
19W
FSDM0265RN
FSDM0265RNB
FSDM0365RN
FSDM0365RNB
Notes:
1. The junction temperature can limit the maximum output power.
2. 230VAC or 100/115VAC with doubler. The maximum power with CCM operation.
3. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient temperature.
4. Maximum practical continuous power in an open-frame design at 50°C ambient.
5. Pb-free package per JEDEC J-STD-020B.
© 2006 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 Rev. 1.0.5
2
www.fairchildsemi.com
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Typical Circuit
AC
IN
Vstr
Drain
Sync
PWM
GND
Vfb Vcc
VO
FSQ0365RN Rev.00
Figure 1. Typical Flyback Application
Internal Block Diagram
Vfb
3
Sync
4
0.7V/0.2V
+
0.35/0.55
VCC
Vref
VBurst
-
Idelay
IFB
3R
R
Soft-
Start
+
-
PWM
Vstr
5
Vcc Drain
2 678
OSC
Vref
VCC good
+
-
8V/12V
LEB
200ns
SQ
RQ
Gate
driver
6V
VSD
Sync
6V
Vovp
TSD
2.5μs time
delay
VCC good
SQ
RQ
AOCP
Figure 2. Functional Block Diagram
VOCP
(1.1V)
1
GND
FSQ0365RN Rev.00
© 2006 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 Rev. 1.0.5
3
www.fairchildsemi.com
Free Datasheet http://www.Datasheet4U.com



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Pin Configuration
GND
Vcc
Vfb
Sync
8-DIP
8-VLSOP
D
D
D
Vstr
FSQ0365RN Rev.01
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin # Name
Description
1 GND SenseFET source terminal on primary side and internal control ground.
Positive supply voltage input. Although connected to an auxiliary transformer winding, current
2
Vcc
is supplied from pin 5 (Vstr) via an internal switch during startup (see Internal Block Diagram
Section). It is not until VCC reaches the UVLO upper threshold (12V) that the internal start-up
switch opens and device power is supplied via the auxiliary transformer winding.
The feedback voltage pin is the non-inverting input to the PWM comparator. It has a 0.9mA
current source connected internally while a capacitor and optocoupler are typically connected
3 Vfb externally. There is a time delay while charging external capacitor Cfb from 3V to 6V using an
internal 5μA current source. This time delay prevents false triggering under transient condi-
tions but still allows the protection mechanism to operate under true overload conditions.
This pin is internally connected to the sync-detect comparator for valley switching. Typically the
4
Sync
voltage of the auxiliary winding is used as Sync input voltage and external resistors and capac-
itor are needed to make time delay to match valley point. The threshold of the internal sync
comparator is 0.7V/0.2V.
This pin is connected to the rectified AC line voltage source. At start-up the internal switch sup-
5 Vstr plies internal bias and charges an external storage capacitor placed between the Vcc pin and
ground. Once the Vcc reaches 12V, the internal switch is opened.
6,7,8
Drain
The drain pins are designed to connect directly to the primary lead of the transformer and are
capable of switching a maximum of 700V. Minimizing the length of the trace connecting these
pins to the transformer will decrease leakage inductance.
© 2006 Fairchild Semiconductor Corporation
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 Rev. 1.0.5
4
www.fairchildsemi.com
Free Datasheet http://www.Datasheet4U.com



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