Bekijk alles

Raadpleeg de Engelse versie als onze officiële versie.Opbrengst

Europa
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Netherlands(Nederland) Spain(español) Turkey(Türk dili) Israel(עִבְרִית) Denmark(Dansk) Switzerland(Deutsch) United Kingdom(English)
Aziatisch-Pacifisch
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Philippines(Pilipino)
Afrika, India en het Midden -Oosten
India(हिंदी)
Noord Amerika
United States(English) Canada(English) Mexico(español)
HuisproductenGeïntegreerde schakelingen (IC's)PMIC - LED-stuurprogramma's

PMIC - LED-stuurprogramma's

3,002 -producten gevonden

Product lijst

1234567...61
Vergelijken Beeld Deel # Fabrikant Beschrijving Inventaris ECAD -model RoHS Voltage - Output Current - Output / Channel Aantal uitgangen topologie Spanning - Toevoer (Max) Spanning - Toevoer (Min) dimmen Base Productnummer Pakket Serie Frequentie Temperatuur montage Type Type toepassingen Verpakking / doos Leverancier Device Pakket Interne Switch (s) Aantal stuks
LM3404HVMA LM3404HVMA Texas Instruments IC LED DRIVER RGLTR PWM 1A 8SOIC Op voorraad7920 pcs 73V 1A 1 Step-Down (Buck) 75V 6V PWM LM3404 Tube - 1MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Regulator Automotive, Lighting 8-SOIC (0.154', 3.90mm Width) 8-SOIC Yes
IS31FL3193-DLS2-TR IS31FL3193-DLS2-TR Lumissil Microsystems IC LED DRIVER LINEAR 42MA 10DFN Op voorraad98900 pcs - 42mA 3 - 5.5V 2.7V - IS31FL3193 Tape & Reel (TR) - - -40°C ~ 85°C (TA) Surface Mount Linear - 10-WFDFN Exposed Pad 10-DFN (3x3) Yes
HV9912NG-G-M901 HV9912NG-G-M901 Microchip Technology IC LED DRIVER CTRLR PWM 16SOIC Op voorraad31628 pcs - - 1 SEPIC, Step-Down (Buck), Step-Up (Boost) 100V 9V Analog, PWM HV9912 Tape & Reel (TR) - 106kHz, 580kHz -40°C ~ 125°C (TA) Surface Mount DC DC Controller Backlight, Lighting 16-SOIC (0.154', 3.90mm Width) 16-SOIC No
FT886A-RT FT886A-RT Fremont Micro Devices Ltd IC LED DRIVER OFFL 180MA 8SOP Op voorraad218920 pcs - 180mA 1 Step-Down (Buck) 20V 9V - FT886A Tape & Reel (TR) - 5kHz -40°C ~ 125°C (TA) Surface Mount AC DC Offline Switcher Backlight 8-SOIC (0.154', 3.90mm Width) 8-SOP Yes
LT3474IFE#PBF LT3474IFE#PBF Analog Devices Inc. IC LED DRVR RGLTR PWM 1A 16TSSOP Op voorraad5471 pcs - 1A 1 Step-Down (Buck) 36V 3.5V PWM LT3474 Tube - 200kHz ~ 2MHz -40°C ~ 125°C (TA) Surface Mount DC DC Regulator Automotive, Backlight 16-TSSOP (0.173", 4.40mm Width) Exposed Pad 16-TSSOP-EP Yes
LT3465ES6#TRPBF LT3465ES6#TRPBF Analog Devices Inc. IC LED DRVR RGLTR PWM TSOT23-6 Op voorraad18008 pcs 30V 225mA (Switch) 1 Step-Up (Boost) 16V 2.7V PWM LT3465 Tape & Reel (TR) - 1.2MHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight SOT-23-6 Thin, TSOT-23-6 TSOT-23-6 Yes
MXHV9910BE MXHV9910BE IXYS Integrated Circuits Division IC LED DRIVER OFFL PWM 8SOIC Op voorraad38949 pcs - - 1 Step-Down (Buck) 450V 8V PWM MXHV9910 Tube - 64kHz -40°C ~ 85°C (TA) Surface Mount AC DC Offline Switcher Signage 8-SOIC (0.154', 3.90mm Width) Exposed Pad 8-SOIC-EP No
LT3486EFE#TRPBF LT3486EFE#TRPBF Analog Devices Inc. IC LED DRV RGLTR PWM 16TSSOP Op voorraad9854 pcs - 1.3A (Switch) 2 Step-Up (Boost) 24V 2.5V PWM LT3486 Tape & Reel (TR) - 2.2MHz -40°C ~ 85°C (TJ) Surface Mount DC DC Regulator Backlight, Camera Flash 16-TSSOP (0.173", 4.40mm Width) Exposed Pad 16-TSSOP-EP Yes
LM3502SQ-25 LM3502SQ-25 Texas Instruments LED DRIVER, 10-SEGMENT Op voorraad46770 pcs 25V 600mA (Switch) 2 Step-Up (Boost) 5.5V 2.5V PWM - Bulk - 1MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Regulator Backlight 16-WFQFN Exposed Pad 16-WQFN (4x4) Yes
LED1642GWPTR LED1642GWPTR STMicroelectronics IC LED DRVR LIN PWM 40MA 24QSOP Op voorraad25276 pcs 19V 40mA 16 Shift Register 5.5V 3V PWM LED1642 Tape & Reel (TR) - 30MHz -40°C ~ 85°C (TA) Surface Mount Linear Signage 24-SSOP (0.154", 3.90mm Width) 24-QSOP Yes
TLC59282RGER TLC59282RGER Texas Instruments IC LED DRIVER LINEAR 45MA 24VQFN Op voorraad57900 pcs 17V 45mA 16 Shift Register 5.5V 3V - TLC59282 Tape & Reel (TR) - 35MHz -40°C ~ 85°C (TA) Surface Mount Linear - 24-VFQFN Exposed Pad 24-VQFN (4x4) Yes
STP16DPPS05TTR STP16DPPS05TTR STMicroelectronics IC LED DRVR LINEAR 40MA 24TSSOP Op voorraad39149 pcs 20V 40mA 16 Shift Register 5.5V 3V - STP16DPPS05 Tape & Reel (TR) - 30MHz -40°C ~ 125°C (TA) Surface Mount Linear - 24-TSSOP (0.173", 4.40mm Width) 24-TSSOP Yes
PAM2812ABR PAM2812ABR Diodes Incorporated IC LED DRV LIN PWM 20MA TSOT23-6 Op voorraad7650 pcs - 20mA 4 - 5.5V 2.7V PWM PAM2812 Tape & Reel (TR) - - -40°C ~ 85°C (TA) Surface Mount Linear Backlight SOT-23-6 Thin, TSOT-23-6 TSOT-23-6 Yes
SP7686AER-L/TR SP7686AER-L/TR MaxLinear, Inc. IC LED DRIVER RGLTR 500MA 8DFN Op voorraad7900 pcs - 500mA 1 Switched Capacitor (Charge Pump) 5.5V 2.7V - SP7686 Tape & Reel (TR) - 2.4MHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Camera Flash 8-VFDFN Exposed Pad 8-DFN (2x3) -
LT3760EFE#PBF LT3760EFE#PBF Analog Devices Inc. IC LED DRVR CTRLR PWM 28TSSOP Op voorraad6522 pcs 6.95V 100mA 8 Step-Up (Boost) 40V 6V Analog, PWM LT3760 Tube - 100kHz ~ 1MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Controller Backlight 28-TSSOP (0.173', 4.40mm Width) Exposed Pad 28-TSSOP-EP No
TPS61161DRVT TPS61161DRVT Texas Instruments IC LED DRV RGLTR PWM 700MA 6WSON Op voorraad29204 pcs 38V 700mA (Switch) 1 Step-Up (Boost) 18V 2.7V PWM TPS61161 Tape & Reel (TR) - 600kHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight 6-WDFN Exposed Pad 6-WSON (2x2) Yes
BD8388FV-ME2 BD8388FV-ME2 Rohm Semiconductor IC LED DRVR LIN PWM 50MA 16SSOP Op voorraad79280 pcs 40V 50mA 8 Shift Register 5.5V 3V PWM BD8388 Tape & Reel (TR) Automotive, AEC-Q100 - -40°C ~ 125°C (TA) Surface Mount Linear Automotive 16-LSSOP (0.173", 4.40mm Width) 16-SSOP-B Yes
LT3518EFE#TRPBF LT3518EFE#TRPBF Analog Devices Inc. IC LED DRV RGLTR PWM 16TSSOP Op voorraad5302 pcs - 2.3A (Switch) 1 Step-Down (Buck), Step-Up (Boost) 30V 3V Analog, PWM LT3518 Tape & Reel (TR) - 250kHz ~ 2.5MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Regulator Backlight 16-TSSOP (0.173", 4.40mm Width) Exposed Pad 16-TSSOP-EP Yes
FAN5616MPX FAN5616MPX Fairchild Semiconductor IC LED DRVR RGLTR PWM 40MA 16MLP Op voorraad61810 pcs - 40mA 3 Switched Capacitor (Charge Pump) 5.5V 2.5V PWM FAN5616 Bulk - 1MHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight 16-WFQFN Exposed Pad 16-MLP (3x3) Yes
ISL78171ARZ-T7A ISL78171ARZ-T7A Renesas Electronics America Inc IC LED DRVR RGLTR PWM 50MA 20QFN Op voorraad13510 pcs 40V 50mA 6 Step-Up (Boost) 26.5V 4.5V Analog, I²C, PWM ISL78171 Tape & Reel (TR) Automotive, AEC-Q100 600kHz, 1.2MHz -40°C ~ 105°C (TA) Surface Mount DC DC Regulator Automotive, Backlight 20-VFQFN Exposed Pad 20-QFN (3x4) Yes
CL1N8-G CL1N8-G Microchip Technology IC LED DRVR LINEAR 20MA TO243AA Op voorraad45286 pcs - 20mA 1 - 90V 5V - CL1N8 Tape & Reel (TR) - - -40°C ~ 125°C (TJ) Surface Mount Linear Signage TO-243AA TO-243AA (SOT-89) Yes
LDS8869-002-T2 LDS8869-002-T2 IXYS Integrated Circuits Division IC LED DRIVER RGLTR 32MA 16TQFN Op voorraad16370 pcs 6V 32mA 6 Switched Capacitor (Charge Pump) 5.5V 2.7V - LDS8869 Tape & Reel (TR) PowerLite™ 1.1MHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight 16-WFQFN Exposed Pad 16-TQFN (3x3) Yes
LM3402HVMM LM3402HVMM Texas Instruments IC LED DRV RGLTR PWM 8VSSOP Op voorraad12700 pcs 73V 500mA 1 Step-Down (Buck) 75V 6V PWM LM3402 Tape & Reel (TR) - 1MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Regulator Lighting 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-VSSOP Yes
LT3799EMSE#PBF LT3799EMSE#PBF Analog Devices Inc. IC LED DRIVER OFFL TRIAC 16MSOP Op voorraad10930 pcs - - 1 Flyback - - Triac LT3799 Tube - 25kHz ~ 300kHz -40°C ~ 125°C (TJ) Surface Mount AC DC Offline Switcher - 16-TFSOP (0.118", 3.00mm Width) Exposed Pad 16-MSOP-EP No
TLD11141EPXUMA1 TLD11141EPXUMA1 Infineon Technologies IC LED DRV LIN PWM 180MA 14TSDSO Op voorraad47230 pcs 70V 180mA 1 - 40V 5.5V PWM TLD11141 Tape & Reel (TR) Automotive, AEC-Q100, LITIX™ - -40°C ~ 150°C (TJ) Surface Mount Linear Automotive 14-TSSOP (0.154", 3.90mm Width) Exposed Pad PG-TSDSO-14 Yes
AT9917TS-G AT9917TS-G Microchip Technology IC LED DRIVER CTRLR PWM 24TSSOP Op voorraad13340 pcs - - 1 SEPIC, Step-Down (Buck), Step-Up (Boost) 40V 5.3V Analog, PWM AT9917 Tape & Reel (TR) Automotive, AEC-Q100 100kHz ~ 800kHz -40°C ~ 150°C (TJ) Surface Mount DC DC Controller Automotive 24-TSSOP (0.173', 4.40mm Width) 24-TSSOP No
LT3952EFE#PBF LT3952EFE#PBF Analog Devices Inc. IC LED DRVR RGLTR PWM 4A 28TSSOP Op voorraad5460 pcs 60V 4A (Switch) 1 Step-Up (Boost) 42V 3V Analog, PWM LT3952 Tube True Color PWM™ 215kHz ~ 3MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Regulator Automotive, Backlight 28-TSSOP (0.173', 4.40mm Width) Exposed Pad 28-TSSOP-EP Yes
AL3065AS16-13 AL3065AS16-13 Diodes Incorporated IC LED DRVR CTRLR PWM 250MA 16SO Op voorraad41200 pcs 60V 250mA 4 Step-Up (Boost) 33V 4.5V Analog, PWM AL3065 Tape & Reel (TR) - 100kHz ~ 1MHz -40°C ~ 85°C (TA) Surface Mount DC DC Controller Backlight 16-SOIC (0.154", 3.90mm Width) 16-SO No
TLC5947DAP TLC5947DAP Texas Instruments IC LED DRVR LINEAR 30MA 32HTSSOP Op voorraad16622 pcs 30V 30mA 24 Shift Register 5.5V 3V - TLC5947 Tube - 4MHz -40°C ~ 85°C (TA) Surface Mount Linear Backlight 32-PowerTSSOP (0.240", 6.10mm Width) 32-HTSSOP Yes
MP3398AGS MP3398AGS Monolithic Power Systems Inc. IC LED DRV CTRL PWM 350MA 16SOIC Op voorraad10820 pcs - 350mA 4 Step-Up (Boost) 28V 5V Analog, PWM MP3398 Tube - 540kHz -40°C ~ 125°C (TJ) Surface Mount DC DC Controller Backlight 16-SOIC (0.154', 3.90mm Width) 16-SOIC No
MIC2289-15YML-TR MIC2289-15YML-TR Microchip Technology IC LED DRVR RGLTR PWM 750MA 8MLF Op voorraad27227 pcs 15V 750mA (Switch) 1 Step-Up (Boost) 10V 2.5V Analog, PWM MIC2289 Tape & Reel (TR) - 1.2MHz -40°C ~ 125°C (TJ) Surface Mount DC DC Regulator Backlight 8-VFDFN Exposed Pad, 8-MLF® 8-MLF® (2x2) Yes
NCL30002DR2G NCL30002DR2G onsemi IC LED DRIVER OFFL 8SOIC Op voorraad47530 pcs - - 1 Step-Down (Buck) 20V 10.2V - NCL30002 Tape & Reel (TR) - - -40°C ~ 125°C (TJ) Surface Mount AC DC Offline Switcher Lighting 8-SOIC (0.154", 3.90mm Width) 8-SOIC No
MAX8790ETP+ MAX8790ETP+ Analog Devices Inc./Maxim Integrated IC LED DRVR CTRL PWM 25MA 20TQFN Op voorraad4138 pcs - 25mA 6 Step-Up (Boost) 26V 4.5V Analog, PWM MAX8790 Tube - 1MHz -40°C ~ 85°C (TA) Surface Mount DC DC Controller Backlight 20-WFQFN Exposed Pad 20-TQFN (4x4) No
BD81A74MUV-ME2 BD81A74MUV-ME2 Rohm Semiconductor IC LED DRV CTRL PWM VQFN28SV5050 Op voorraad14441 pcs 40V 120mA 4 Step-Down (Buck), Step-Up (Boost) 35V 4.5V PWM BD81A74 Tape & Reel (TR) Automotive, AEC-Q100 200kHz ~ 2.2MHz -40°C ~ 125°C Surface Mount DC DC Controller Automotive 28-VFQFN Exposed Pad VQFN28SV5050 No
IRS25411SPBF IRS25411SPBF Infineon Technologies IC LED DRIVER CTRLR PWM 8SOIC Op voorraad11640 pcs - - 1 Step-Down (Buck) 16.6V 8V PWM IRS25411 Tube - 500kHz -25°C ~ 150°C (TJ) Surface Mount DC DC Controller - 8-SOIC (0.154", 3.90mm Width) 8-SOIC No
MSL3164BT-R MSL3164BT-R Microchip Technology IC LED DRVR LIN PWM 100MA 40TQFN Op voorraad4115 pcs - 100mA 16 - 5.5V 4.75V PWM MSL3164 Tape & Reel (TR) Adaptive SourcePower™ 20MHz -40°C ~ 85°C (TA) Surface Mount Linear Backlight 40-WFQFN Exposed Pad 40-TQFN (6x6) Yes
AL9910-5S-13 AL9910-5S-13 Diodes Incorporated IC LED DRIVER OFFL PWM 8SO Op voorraad45134 pcs - - 1 Step-Down (Buck), Step-Up (Boost) 500V 15V Analog, PWM AL9910 Tape & Reel (TR) - 25kHz ~ 300kHz -40°C ~ 85°C (TA) Surface Mount AC DC Offline Switcher Backlight, Lighting, Signage 8-SOIC (0.154', 3.90mm Width) 8-SO No
LNK458KG LNK458KG Power Integrations IC LED DRVR OFFL TRIAC 1A 12ESOP Op voorraad6070 pcs - 1A 1 - 50V - Triac LNK458 Tube LinkSwitch®-PL 122kHz -40°C ~ 150°C (TJ) Surface Mount AC DC Offline Switcher - 12-BESOP (0.350', 8.89mm Width), 11 Leads, Exposed Pad 12-ESOP Yes
CAT4016VSR CAT4016VSR Catalyst Semiconductor Inc. IC LED DRVR LIN PWM 80MA 24TSSOP Op voorraad121150 pcs 5.5V 80mA 16 Shift Register 5.5V 3V PWM CAT4016 Bulk CAT4016 25MHz -40°C ~ 85°C (TA) Surface Mount Linear Signage 24-TSSOP (0.173", 4.40mm Width) 24-TSSOP Yes
TPS92610QPWPRQ1 TPS92610QPWPRQ1 Texas Instruments IC LED DRV LIN PWM 14HTSSOP Op voorraad41790 pcs 0V ~ 40V 450mA 1 - 40V 4.5V PWM TPS92610 Tape & Reel (TR) Automotive, AEC-Q100 - -40°C ~ 125°C (TA) Surface Mount Linear Automotive, Lighting 14-PowerTSSOP (0.173", 4.40mm Width) 14-HTSSOP No
AL8862SP-13 AL8862SP-13 Diodes Incorporated IC LED DRIVER RGLTR PWM 1A 8SO Op voorraad101120 pcs - 1A 1 Step-Down (Buck) 60V 5V Analog, PWM AL8862 Tape & Reel (TR) - 1MHz -40°C ~ 105°C (TA) Surface Mount DC DC Regulator Commercial & Industrial Lighting 8-SOIC (0.154", 3.90mm Width) Exposed Pad 8-SO-EP Yes
BD83733HFP-MTR BD83733HFP-MTR Rohm Semiconductor IC LED DRVR LIN PWM 500MA HRP7 Op voorraad22248 pcs - 500mA 1 - 42V 4.5V PWM BD83733 Tape & Reel (TR) Automotive, AEC-Q100 100Hz ~ 5kHz -40°C ~ 125°C (TA) Surface Mount Linear Automotive HRP-7 (7 Leads + Tab) HRP7 Yes
MP24183DQ-LF-Z MP24183DQ-LF-Z Monolithic Power Systems Inc. IC LED DRIVER RGLTR PWM 1A 10QFN Op voorraad10040 pcs - 1A 1 Step-Down (Buck) 55V 4.5V Analog, PWM MP24183 Tape & Reel (TR) - - -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Automotive, Backlight 10-VFDFN Exposed Pad 10-QFN (3x3) Yes
CAT3224HV3-GT2 CAT3224HV3-GT2 onsemi IC LED DRIVER RGLTR 2A 16TQFN Op voorraad14762 pcs - 2A (Flash) 2 Switched Capacitor (Charge Pump) 5.5V 2V - CAT3224 Tape & Reel (TR) - 800kHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Camera Flash 16-WFQFN Exposed Pad 16-TQFN (3x3) Yes
TPS61166DSKR TPS61166DSKR Texas Instruments IC LED DRVR RGLTR PWM 1.1A 10SON Op voorraad34327 pcs 17V 1.1A (Switch) 1 Step-Up (Boost) 6V 2.5V PWM TPS61166 Tape & Reel (TR) - 1.2MHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight 10-WFDFN Exposed Pad 10-SON (2.5x2.5) Yes
MPQ3326GR-AEC1-Z MPQ3326GR-AEC1-Z Monolithic Power Systems Inc. IC LED DRVR LIN PWM 50MA 24QFN Op voorraad21332 pcs - 50mA 16 - 16V 4V Analog, I²C, PWM MPQ3326 Tape & Reel (TR) Automotive, AEC-Q100 - -40°C ~ 150°C (TJ) Surface Mount Linear Automotive 24-PowerVFQFN 24-QFN (4x4) Yes
LTC3214EDD#TRPBF LTC3214EDD#TRPBF Analog Devices Inc. IC LED DRIVER RGLTR 500MA 10DFN Op voorraad10702 pcs - 500mA 1 Switched Capacitor (Charge Pump) 4.5V 2.9V - LTC3214 Tape & Reel (TR) - 900kHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight, Lighting 10-WFDFN Exposed Pad 10-DFN (3x3) Yes
LT3761AEMSE#PBF LT3761AEMSE#PBF Analog Devices Inc. IC LED DRIVER CTRLR PWM 16MSOP Op voorraad4961 pcs - - 1 Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost) 60V 4.5V Analog, PWM LT3761 Tube True Color PWM™ 100kHz ~ 1MHz -40°C ~ 125°C (TA) Surface Mount DC DC Controller - 16-TFSOP (0.118", 3.00mm Width) Exposed Pad 16-MSOP-EP No
STP04CM596XTTR STP04CM596XTTR STMicroelectronics IC LED DRVR LINEAR 500MA 16TSSOP Op voorraad6440 pcs 16V 500mA 4 Shift Register 5.5V 3.3V - STP04CM596 Tape & Reel (TR) - 25MHz -40°C ~ 125°C (TA) Surface Mount Linear - 16-TSSOP (0.173", 4.40mm Width) Exposed Pad 16-TSSOP-EP Yes
MAX1912EUB+ MAX1912EUB+ Analog Devices Inc./Maxim Integrated IC LED DRIVER RGLTR 120MA 10UMAX Op voorraad12360 pcs - 120mA 1 Switched Capacitor (Charge Pump) 5.3V 2.7V - MAX1912 Tube - 750kHz -40°C ~ 85°C (TA) Surface Mount DC DC Regulator Backlight 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 10-uMAX/uSOP Yes
1234567...61
0 RFQ
Winkelmand (0 Items)
Het is leeg.
Vergelijk lijst (0 Items)
Het is leeg.
Feedback

Uw feedback is belangrijk!Bij Allelco waarderen we de gebruikerservaring en streven we ernaar deze constant te verbeteren.
Deel uw opmerkingen met ons via ons feedbackformulier en we zullen onmiddellijk reageren.
Bedankt voor het kiezen van Allelco.

Onderwerp
E-mail
Comments
Captcha
Sleep of klik om het bestand te uploaden
Upload bestand
Typen: .xls, .xlsx, .doc, .Docx, .jpg, .png en .pdf.
MAX -bestandsgrootte: 10 MB