NCP1230D133R2G
onsemi
IC OFFLINE SWITCH FLYBACK 8SOIC
Dalam stok77090 pcs
133kHz
7.7V ~ 18V
Isolated
Flyback
12.6 V
80%
Current Limiting, Over Temperature, Over Voltage, Short Circuit
-
No
NCP1230
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
-
-
RFQ
NCP12700BDNR2G
onsemi
IC OFFLINE SWITCH FLYBACK 10MSOP
Dalam stok56050 pcs
100kHz ~ 1MHz
9V ~ 20V
Isolated
Flyback
-
80%
Current Limiting, Open Loop, Over Load, Over Power, Over Temperature, Over Voltage, Short Circuit
EN, Frequency Control, Soft Start, Sync
No
NCP12700
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
10-MSOP
-
-
RFQ
VIPER50SP
STMicroelectronics
IC OFFLIN CONV FLBACK 5PENTAWATT
Dalam stok9260 pcs
Up to 200kHz
8V ~ 15V
Isolated
Flyback
11 V
-
Current Limiting, Over Temperature
Frequency Control, Soft Start, Sync
Yes
VIPER50
Tube
VIPER™
-
Surface Mount
PowerSO-10 Exposed Bottom Pad
5-PENTAWATT
620V
50 W
RFQ
LNK574DG-TL
Power Integrations
IC OFFLINE SWITCH FLYBACK 8SO
Dalam stok81400 pcs
100kHz
-
Isolated
Flyback
-
63%
Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
-
Yes
LNK574
Tape & Reel (TR)
LinkZero™-LP
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width), 7 Leads
SO-8C
700V
3 W
RFQ
LNK6769K
Power Integrations
IC OFFLINE SWITCH FLYBACK 12ESOP
Dalam stok16090 pcs
120kHz ~ 136kHz
-
Isolated
Flyback
-
64%
Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
-
Yes
LNK6769
Tube
LinkSwitch™-HP
-40°C ~ 150°C (TJ)
Surface Mount
12-BESOP (0.350', 8.89mm Width), 11 Leads, Exposed Pad
12-ESOP
650V
77 W
RFQ
LNK4023S-TL
Power Integrations
IC OFFLINE SW FLYBACK SOT23-6
Dalam stok158830 pcs
65kHz
5V ~ 16.5V
Isolated
Flyback
-
-
Over Temperature, Over Voltage, Short Circuit
-
No
LNK4023
Tape & Reel (TR)
LinkSwitch™-4
-25°C ~ 125°C (TJ)
Surface Mount
SOT-23-6
SOT-23-6
-
8 W
RFQ
VIPER013XSTR
STMicroelectronics
IC OFFLINE SWITCH MULT TOP 10SSO
Dalam stok60280 pcs
30kHz
4.5V ~ 30V
Either
Buck, Buck-Boost, Flyback
8 V
80%
Current Limiting, Over Temperature, Over Voltage, Short Circuit
-
Yes
VIPER013
Tape & Reel (TR)
-
-40°C ~ 150°C (TJ)
Surface Mount
10-SOP (0.154", 3.90mm Width)
10-SSOP
800V
7 W
RFQ
LNK6663K
Power Integrations
IC OFFLINE SWITCH FLYBACK 12ESOP
Dalam stok8160 pcs
120kHz ~ 136kHz
-
Isolated
Flyback
-
64%
Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
-
Yes
LNK6663
Tube
LinkSwitch™-HP
-40°C ~ 150°C (TJ)
Surface Mount
12-BESOP (0.350', 8.89mm Width), 11 Leads, Exposed Pad
12-ESOP
650V
35 W
RFQ
LNK562PN
Power Integrations
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok76860 pcs
66kHz
-
Isolated
Flyback
-
70%
Current Limiting, Open Loop, Over Temperature, Short Circuit
-
Yes
LNK562
Tube
LinkSwitch®-LP
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300", 7.62mm), 7 Leads
8-PDIP-B
700V
1.9 W
RFQ
ICE2BS01
Infineon Technologies
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok8910 pcs
67kHz
8.5V ~ 21V
Isolated
Flyback
13.5 V
72%
Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage
Soft Start
No
ICE2BS01
Tube
-
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300", 7.62mm)
PG-DIP-8
-
-
RFQ
INN3268C-H210-TL
Power Integrations
IC OFFLINE SW MULT TOP 24INSOP
Dalam stok32437 pcs
100kHz
-
Isolated
Flyback, Secondary Side SR
-
-
Current Limiting, Over Temperature, Over Voltage
-
Yes
INN3268
Tape & Reel (TR)
PowiGaN™, InnoSwitch™3-CP
-40°C ~ 150°C (TJ)
Surface Mount
24-PowerSMD Module (0.425", 10.80mm Width), 17 Leads
InSOP-24D
650V
50 W
RFQ
UC3843B
UMW
SOP-8 AC-DC CONTROLLERS & REGULA
Dalam stok189800 pcs
50kHz, 52kHz
7.6V ~ 30V
Non-Isolated
Boost, Flyback
8.4 V
97%
Current Limiting, UVLO
Frequency Control, Soft Start
Yes
UC3843
Tape & Reel (TR)
-
0°C ~ 70°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOP
-
-
RFQ
VIPER28LD
STMicroelectronics
IC OFFLINE SWITCH FLYBACK 16SO
Dalam stok60890 pcs
60kHz
8.5V ~ 23.5V
Isolated
Flyback
14 V
80%
Current Limiting, Over Temperature, Over Voltage, Short Circuit
-
Yes
VIPER28
Tube
VIPer™ plus
-40°C ~ 150°C (TJ)
Surface Mount
16-SOIC (0.154', 3.90mm Width)
16-SO
800V
16 W
RFQ
TOP249FN
Power Integrations
IC OFFLINE SW FLYBACK TO262-7C
Dalam stok6470 pcs
66kHz ~ 132kHz
-
Isolated
Flyback
-
66.8%
Current Limiting, Over Temperature, Over Voltage
Frequency Control
Yes
TOP249
Tube
TOPSwitch®-GX
-40°C ~ 150°C (TJ)
Through Hole
TO-262-7 (Formed Leads), 6 Leads
TO-262-7C
700V
250 W
RFQ
FSQ0765RSLDTU
Fairchild Semiconductor
IC OFFLINE SW FLBACK TO220F-6L
Dalam stok23327 pcs
48kHz ~ 67kHz
8V ~ 20V
Isolated
Flyback
12 V
-
Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
Sync
Yes
FSQ0765
Tube
FPS™
-25°C ~ 85°C (TA)
Through Hole
TO-220-6 Full Pack, Formed Leads
TO-220F-6L (L-Forming)
650V
90 W
RFQ
NCP1247DD100R2G
onsemi
IC OFFLINE SWITCH FLYBACK 7SOIC
Dalam stok6250 pcs
100kHz
8.9V ~ 28V
Isolated
Flyback
12 V
80%
Current Limiting, Over Load, Over Power, Over Temperature, Over Voltage
-
No
NCP1247
Tape & Reel (TR)
-
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width), 7 Leads
7-SOIC
-
-
RFQ
AP3983CMTR-G1
Diodes Incorporated
IC OFFLINE SWITCH FLYBACK 7SO
Dalam stok16340 pcs
65kHz
6.82V ~ 25V
Isolated
Flyback
15.5 V
-
Over Temperature, Over Voltage, Short Circuit
-
Yes
AP3983
Tape & Reel (TR)
-
-40°C ~ 105°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width), 7 Leads
7-SO
650V
6 W
RFQ
UCC2809PW-1
Texas Instruments
IC OFFLINE SW MULT TOP 8TSSOP
Dalam stok11302 pcs
1MHz
8V ~ 19V
Isolated
Boost, Flyback, Forward
10 V
70%
-
Frequency Control, Soft Start
No
UCC2809
Tube
-
-55°C ~ 150°C (TJ)
Surface Mount
8-TSSOP (0.173', 4.40mm Width)
8-TSSOP
-
-
RFQ
LNK625DG
Power Integrations
IC OFFLINE SWITCH FLYBACK 8SO
Dalam stok6850 pcs
100kHz
-
Isolated
Flyback
-
54%
Current Limiting, Open Loop, Over Temperature, Short Circuit
-
Yes
LNK625
Tube
LinkSwitch®-CV
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width), 7 Leads
SO-8C
725V
13.5 W
RFQ
LNK304DG
Power Integrations
IC OFFLINE SWITCH MULT TOP 8SO
Dalam stok6810 pcs
66kHz
-
Non-Isolated
Buck, Buck-Boost, Flyback
-
69%
Current Limiting, Open Loop, Over Temperature, Short Circuit
-
Yes
LNK304
Tube
LinkSwitch®-TN
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154", 3.90mm Width), 7 Leads
SO-8C
700V
-
RFQ
LNK304G
Power Integrations
IC OFFLINE SWITCH MULT TOP 8SMD
Dalam stok13970 pcs
66kHz
-
Non-Isolated
Buck, Buck-Boost, Flyback
-
69%
Current Limiting, Open Loop, Over Temperature, Short Circuit
-
Yes
LNK304
Bulk
LinkSwitch®-TN
-40°C ~ 150°C (TJ)
Surface Mount
8-SMD (7 Leads), Gull Wing
SMD-8B
700V
-
RFQ
FSGM0565RWDTU
onsemi
IC OFFLINE SW FLBACK TO220F-6L
Dalam stok6110 pcs
66kHz
7.5V ~ 26V
Isolated
Flyback
12 V
70%
Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
-
Yes
FSGM0565
Tube
FPS™
-40°C ~ 125°C (TJ)
Through Hole
TO-220-6 Full Pack, Formed Leads
TO-220F-6L (Forming)
650V
80 W
RFQ
TNY375DG
Power Integrations
IC OFFLINE SWITCH FLYBACK 8SO
Dalam stok12120 pcs
132kHz ~ 264kHz
-
Isolated
Flyback
-
65%
Current Limiting, Over Load, Over Temperature, Over Voltage
EN
Yes
TNY375
Tube
TinySwitch®-PK
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width), 7 Leads
SO-8C
700V
15 W
RFQ
LNK363DN
Power Integrations
IC OFFLINE SWITCH FLYBACK 8SO
Dalam stok8300 pcs
132kHz
-
Isolated
Flyback
-
60%
Current Limiting, Open Loop, Over Temperature, Short Circuit
-
Yes
LNK363
Tube
LinkSwitch®-XT
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154", 3.90mm Width), 7 Leads
SO-8C
700V
7.5 W
RFQ
VIPER38LE
STMicroelectronics
IC OFFLINE SWITCH FLYBACK 10DIP
Dalam stok40200 pcs
60kHz
8.5V ~ 23.5V
Isolated
Flyback
14 V
80%
Current Limiting, Over Temperature, Over Voltage, Short Circuit
-
Yes
VIPER38
Tube
VIPer™ plus
-40°C ~ 150°C (TJ)
Through Hole
10-SDIP (0.300', 7.62mm)
10-SDIP
800V
20 W
RFQ
TOP255GN
Power Integrations
IC OFFLINE SWITCH FLYBACK 8SMD
Dalam stok15520 pcs
66kHz
-
Isolated
Flyback
-
78%
Current Limiting, Over Temperature, Over Voltage
-
Yes
TOP255
Tube
TOPSwitch®-HX
-40°C ~ 150°C (TJ)
Surface Mount
8-SMD (7 Leads), Gull Wing
SMD-8C
700V
30 W
RFQ
MAX17598ATE+T
Analog Devices Inc./Maxim Integrated
IC OFFLINE SWITCH FWD 16TQFN
Dalam stok15661 pcs
100kHz ~ 1MHz
8V ~ 29V
Either
Forward
20 V
72.5%
Current Limiting, Over Voltage
Frequency Control, Soft Start, Sync
No
MAX17598
Tape & Reel (TR)
-
-40°C ~ 150°C (TJ)
Surface Mount
16-WFQFN Exposed Pad
16-TQFN (3x3)
-
-
RFQ
ICE2QR0665
Infineon Technologies
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok12560 pcs
52kHz
10.5V ~ 27V
Isolated
Flyback
18 V
50%
Current Limiting, Over Load, Over Temperature, Over Voltage
-
Yes
ICE2QR0665
Tube
CoolMOS™, CoolSET™-Q1
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm)
PG-DIP-8
650V
88 W
RFQ
ICE3A1065
Infineon Technologies
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok4180 pcs
100kHz
8.5V ~ 21V
Isolated
Flyback
15 V
72%
Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage
Soft Start
Yes
ICE3A1065
Tube
CoolMOS™, CoolSET™F3
-25°C ~ 130°C (TJ)
Through Hole
8-DIP (0.300", 7.62mm)
PG-DIP-8
650V
32 W
RFQ
LNK584GG
Power Integrations
IC OFFLINE SWITCH FLYBACK 8SMD
Dalam stok14800 pcs
100kHz
-
Either
Flyback
-
63%
Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
-
Yes
LNK584
Tube
LinkZero™-AX
-40°C ~ 150°C (TJ)
Surface Mount
8-SMD (7 Leads), Gull Wing
SMD-8C
700V
3 W
RFQ
VIPER16LN
STMicroelectronics
IC OFFLINE SWITCH MULT TOP 7DIP
Dalam stok64060 pcs
60kHz
11.5V ~ 23.5V
Either
Buck, Buck-Boost, Flyback
13 V
70%
Current Limiting, Over Temperature
-
Yes
VIPER16
Tube
VIPer™ plus
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300", 7.62mm), 7 Leads
7-DIP
800V
10 W
RFQ
NCP1203P60
onsemi
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok5470 pcs
60kHz
7.8V ~ 16V
Isolated
Flyback
12.8 V
80%
Over Load, Over Temperature, Short Circuit
-
No
NCP1203
Tube
SMARTMOS™
-40°C ~ 125°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm)
8-PDIP
-
-
RFQ
ISL8844AABZ
Renesas Electronics America Inc
IC OFFLINE SWITCH MULT TOP 8SOIC
Dalam stok15543 pcs
Up to 2MHz
8.8V ~ 30V
Non-Isolated
Boost, Flyback
14.4 V
48%
Current Limiting
Frequency Control
No
ISL8844
Tube
-
-40°C ~ 105°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
-
RFQ
NCP1236AD65R2G
onsemi
IC OFFLINE SWITCH FLYBACK 7SOIC
Dalam stok106080 pcs
65kHz
9.5V ~ 28V
Isolated
Flyback
12 V
80%
Over Load, Over Power, Over Temperature, Over Voltage
-
No
NCP1236
Tape & Reel (TR)
-
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width), 7 Leads
7-SOIC
-
-
RFQ
NCP1217D100R2G
onsemi
IC OFFLINE SWITCH FLYBACK 8SOIC
Dalam stok6080 pcs
100kHz
7.6V ~ 16V
Isolated
Flyback
12.8 V
74%
Over Load, Over Temperature, Short Circuit
-
No
NCP1217
Tape & Reel (TR)
-
0°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
-
RFQ
BM1P101FJ-E2
Rohm Semiconductor
IC OFFLINE SWITCH FLYBACK 8SOPJ
Dalam stok39220 pcs
100kHz
8.9V ~ 26V
Either
Flyback
13.5 V
75%
Current Limiting, Over Voltage
-
No
BM1P101
Tape & Reel (TR)
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOP-J
-
-
RFQ
TEA1721AT/N1,118
NXP USA Inc.
IC OFFLINE SWITCH FLYBACK 7SOIC
Dalam stok46330 pcs
22.5kHz ~ 50.5kHz
8.5V ~ 35V
-
Flyback
17 V
75%
Over Temperature, Over Voltage, Short Circuit
-
Yes
TEA1721
Tape & Reel (TR)
-
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154", 3.90mm Width), 7 Leads
7-SOIC
700V
5 W
RFQ
VIPER16HN
STMicroelectronics
IC OFFLINE SWITCH MULT TOP 7DIP
Dalam stok73080 pcs
115kHz
11.5V ~ 23.5V
Either
Buck, Buck-Boost, Flyback
13 V
70%
Current Limiting, Over Temperature
-
Yes
VIPER16
Tube
VIPer™ plus
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm), 7 Leads
7-DIP
800V
10 W
RFQ
NCP1396ADR2G
onsemi
IC OFFLINE SW HALF-BRDG 16SOIC
Dalam stok47830 pcs
50kHz ~ 500kHz
9.5V ~ 20V
Isolated
Half-Bridge
13.4 V
50%
Over Temperature
Frequency Control, Soft Start
No
NCP1396
Tape & Reel (TR)
-
-40°C ~ 150°C (TJ)
Surface Mount
16-SOIC (0.154", 3.90mm Width), 15 Leads
16-SOIC
-
-
RFQ
TOP103YN
Power Integrations
IC OFFLINE SW MULT TOP TO220-3
Dalam stok3820 pcs
100kHz
-
Isolated
Boost, Buck, Flyback, Forward
-
67%
Current Limiting, Over Temperature
-
Yes
TOP103
Tube
TOPSwitch®
-40°C ~ 150°C (TJ)
Through Hole
TO-220-3
TO-220-3
350V
90 W
RFQ
FSL117MRIN
onsemi
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok66410 pcs
67kHz
7.5V ~ 26V
Isolated
Flyback
12 V
67%
Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
-
Yes
FSL117
Tube
FPS™
-40°C ~ 125°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm)
8-DIP
700V
15 W
RFQ
FAN302HLMY-F117
onsemi
IC OFFLINE SWITCH FLYBACK 8SOIC
Dalam stok7120 pcs
85kHz
5V ~ 25V
Isolated
Flyback
16 V
67%
Current Limiting, Over Temperature, Over Voltage
-
No
FAN302
Tape & Reel (TR)
mWSaver™
-40°C ~ 105°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
-
-
RFQ
TOP232P
Power Integrations
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok3740 pcs
66kHz ~ 132kHz
-
Isolated
Flyback
-
78%
Current Limiting, Over Temperature, Over Voltage
Frequency Control
Yes
TOP232
Tube
TOPSwitch®-FX
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm), 7 Leads
8-PDIP-B
700V
15 W
RFQ
MP174GJ-Z
Monolithic Power Systems Inc.
IC OFFLIN CONV MULT TOP TSOT23-5
Dalam stok36020 pcs
-
5.3V ~ 5.6V
Non-Isolated
Boost, Buck, Buck-Boost, Flyback
-
-
Open Loop, Over Load, Over Temperature, Short Circuit
Soft Start
No
MP174
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
SOT-23-5 Thin, TSOT-23-5
TSOT-23-5
700V
5 W
RFQ
FSFR1800
onsemi
IC OFFLINE SW HALF-BRIDGE 9SIP
Dalam stok10320 pcs
Up to 300kHz
11.3V ~ 25V
Isolated
Half-Bridge
14.5 V
50%
Current Limiting, Over Load, Over Temperature, Over Voltage
EN, Frequency Control
Yes
FSFR1800
Tube
FSFR
-40°C ~ 130°C (TJ)
Through Hole
10-SIP Module, 9 Leads, Formed Leads
9-SIP
500V
260 W
RFQ
ICE3B0565
Infineon Technologies
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok4840 pcs
67kHz
8.5V ~ 21V
Isolated
Flyback
15 V
72%
Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage
Soft Start
Yes
ICE3B0565
Tube
CoolMOS™, CoolSET™F3
-40°C ~ 150°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm)
PG-DIP-8
650V
25 W
RFQ
LNK302DG
Power Integrations
IC OFFLINE SWITCH MULT TOP 8SO
Dalam stok6700 pcs
66kHz
-
Non-Isolated
Buck, Buck-Boost, Flyback
-
69%
Current Limiting, Open Loop, Over Temperature, Short Circuit
-
Yes
LNK302
Tube
LinkSwitch®-TN
-40°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154", 3.90mm Width), 7 Leads
SO-8C
700V
-
RFQ
NCP1203P40G
onsemi
IC OFFLINE SWITCH FLYBACK 8DIP
Dalam stok9730 pcs
40kHz
7.8V ~ 16V
Isolated
Flyback
12.8 V
80%
Over Load, Over Temperature, Short Circuit
-
No
NCP1203
Tube
SMARTMOS™
-40°C ~ 125°C (TJ)
Through Hole
8-DIP (0.300', 7.62mm)
8-PDIP
-
-
RFQ
HR1000AGS-Z
Monolithic Power Systems Inc.
IC OFFLINE SW HALF-BRDG 16SOIC
Dalam stok30551 pcs
Up to 600kHz
13V ~ 15.5V
Isolated
Half-Bridge
-
50%
Over Temperature, Over Voltage
Soft Start
No
HR1000
Tape & Reel (TR)
-
-40°C ~ 125°C (TJ)
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
-
-
RFQ
NCP1216D65R2G
onsemi
IC OFFLINE SWITCH FLYBACK 8SOIC
Dalam stok55380 pcs
65kHz
10V ~ 16V
Isolated
Flyback
-
75%
Over Load, Over Temperature, Short Circuit
-
No
NCP1216
Tape & Reel (TR)
-
0°C ~ 150°C (TJ)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
-
-
RFQ