FSQ321

Packaging : Tube
Mounting Style : Through Hole
Output Voltage : 650 V
Input Voltage : 9 V to 20 V
Switching Frequency : 67 KHz
Operating Temperature Range : - 25 C to + 85 C
Output Current : 0.53 A
Output Power : 10 W
Package / Case : DIP-8


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)




Application

·Power Supply for DVP Player and DVD Recorder, Set-Top Box
·Adapter
·Auxiliary Power Supply for PC, LCD TV, and PDP TV




Pinout






Specifications

Symbol	Characteristic		Min	Max.	Unit
VSTR	Vstr Pin Voltage		500		V
VDS	Drain Pin Voltage		650		V
VCC	Supply Voltage			20	V
VFB	Feedback Voltage Range		-0.3	9.0	V
Vsync	Sync Pin Voltage Range		-0.3	9.0	V
IDM	Drain Current Pulsed(6)	FSQ0365		12	A
		FSQ0265		8	A
		FSQ0165		4	A
		FSQ321/311		1.5	A
EAS	Single Pulsed Avalanche Energy(7)	FSQ0365		230	mJ
		FSQ0265		140	mJ
		FSQ0165		50	mJ
		FSQ321/311		10	mJ
PD	Total Power Dissipation			1.5	W
TJ	Recommended Operating Junction Temperature		-40	Internally limited	°C
TA	Operating Ambient Temperature		-40	85	°C
TSTG	Storage Temperature		-55	150	°C
ESD	Human Body Model(8)		CLASS1 C
	Machine Model(8)		CLASS B

Notes:
6. Repetitive rating: Pulse width limited by maximum junction temperature.
7. L=51mH, starting T_J=25°C.
8. Meets JEDEC standards JESD22-A114 and JESD22-A115.

Product	Product status	Eco Status	Pricing*	Package type	Leads	Packing method	Package Drawing	Package Marking Convention**
FSQ321	Full Production	RoHS Compliant	$0.70	DIP	8	RAIL		Line 1: Q321 Line 2: &E&E&Z&3
FSQ321L	Full Production	RoHS Compliant	$0.70	SOP	8	RAIL	TBD	Line 1: Q321 Line 2: &E&E&Z&3
FSQ321LX	Full Production	RoHS Compliant	$0.374	SOP	8	TAPE REEL	TBD	Line 1: &E&EQ321 Line 2: &E&E&Z&3

* Fairchild 1,000 piece Budgetary Pricing

** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Package marking information for product FSQ321 is available. Click here for more information .

Description

A Valley Switching Converter FSQ-series 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 FSQ-series 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. FSQ-series provides a basic platform that is well suited for costeffective designs of valley switching fly-back converters.

Parameters:

Technical/Catalog Information	FSQ321
Vendor	Fairchild Semiconductor
Category	Integrated Circuits (ICs)
Packaging	Tube
Package / Case	8-DIP
Power (Watts)	10W
Voltage - Input	7 ~ 20 V
Voltage - Output	650V
Frequency Range	84 ~ 95.2kHz
Operating Temperature	-40°C ~ 85°C
Output Isolation	Isolated
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	FSQ321 FSQ321