FSQ311L datasheet, PDF - EEWORLD Datasheet

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FSQ311L: Description1.5 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, LSOP-8; CategoryPower/power management The power supply circuit; File Size2MB，25 Pages; ManufacturerRochester Electronics; Websitehttps://www.rocelec.com/

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FSQ311L Overview

1.5 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, LSOP-8

FSQ311L Parametric

Parameter Name	Attribute value
Maker	Rochester Electronics
Parts packaging code	SOIC
package instruction	SOP,
Contacts	8
Reach Compliance Code	unknow
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Minimum input voltage	9 V
Nominal input voltage	15 V
JESD-30 code	R-PDSO-G8
length	9.2 mm
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-25 °C
Maximum output current	1.5 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Maximum seat height	3.7 mm
surface mount	YES
Switch configuration	SINGLE
Maximum switching frequency	67 kHz
Temperature level	OTHER
Terminal form	GULL WING
Terminal pitch	2.54 mm
Terminal location	DUAL
width	6.4 mm

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FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 — Green Mode Fairchild Power Switch (FPS™)

Pin Configuration

GND

Vcc

Vfb

Sync

FSQ0365RN Rev.01

8-DIP

8-LSOP

Vstr

Figure 3. Pin Configuration (Top View)

Pin Definitions

Pin #

Name

GND

Vcc

Description

SenseFET source terminal on primary side and internal control ground.

Positive supply voltage input. Although connected to an auxiliary transformer winding, current

is supplied from pin 5 (Vstr) via an internal switch during startup (see Internal Block Diagram

Section). It is not until V

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

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

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-

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.

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.

Vfb

Sync

Vstr

6,7,8

Drain

FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 Rev. 1.0.5

www.fairchildsemi.com

FSQ311L Related Products

	FSQ311L	FSQ0265RL	FSQ0265RN	FSQ0365RL	FSQ0365RN
Description	1.5 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, LSOP-8	1.34 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDSO8, MLSOP-8	1.34 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDIP8, MS-001BA, DIP-8	1.68 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDSO8, MLSOP-8	1.68 A SWITCHING REGULATOR, 67 kHz SWITCHING FREQ-MAX, PDIP8, MS-001BA, DIP-8
Maker	Rochester Electronics	Rochester Electronics	Rochester Electronics	Rochester Electronics	Rochester Electronics
Parts packaging code	SOIC	SOIC	DIP	SOIC	DIP
package instruction	SOP,	SOP,	DIP,	SOP,	DIP,
Contacts	8	8	8	8	8
Reach Compliance Code	unknow	unknow	unknow	unknown	unknow
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
control mode	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Minimum input voltage	9 V	9 V	9 V	9 V	9 V
Nominal input voltage	15 V	15 V	15 V	15 V	15 V
JESD-30 code	R-PDSO-G8	R-PDSO-G8	R-PDIP-T8	R-PDSO-G8	R-PDIP-T8
length	9.2 mm	9.2 mm	9.805 mm	9.2 mm	9.805 mm
Number of functions	1	1	1	1	1
Number of terminals	8	8	8	8	8
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-25 °C	-40 °C	-40 °C	-40 °C	-40 °C
Maximum output current	1.5 A	1.34 A	1.34 A	1.68 A	1.68 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	SOP	DIP	SOP	DIP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	SMALL OUTLINE	IN-LINE	SMALL OUTLINE	IN-LINE
Maximum seat height	3.7 mm	3.7 mm	5.33 mm	3.7 mm	5.33 mm
surface mount	YES	YES	NO	YES	NO
Switch configuration	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE
Maximum switching frequency	67 kHz	67 kHz	67 kHz	67 kHz	67 kHz
Temperature level	OTHER	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	GULL WING	GULL WING	THROUGH-HOLE	GULL WING	THROUGH-HOLE
Terminal pitch	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL
width	6.4 mm	6.4 mm	7.62 mm	6.4 mm	7.62 mm
Is it lead-free?	-	Lead free	Lead free	Lead free	Lead free
Is it Rohs certified?	-	conform to	conform to	conform to	conform to
JESD-609 code	-	e3	e3	e3	e3
Humidity sensitivity level	-	1	NOT APPLICABLE	1	NOT APPLICABLE
Peak Reflow Temperature (Celsius)	-	250	NOT SPECIFIED	250	NOT SPECIFIED
Terminal surface	-	MATTE TIN	MATTE TIN	MATTE TIN	MATTE TIN
Maximum time at peak reflow temperature	-	30	NOT SPECIFIED	30	NOT SPECIFIED

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