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>UC3867N UC3867N NATIONAL SEMICONDUCTOR - Voltage Mode PWM Controller 500mA 550kHz 16-Pin PDIP Tube 6.72
>UCC25701N UCC25701N NATIONAL SEMICONDUCTOR - Voltage Mode PWM Controller 1A 700kHz 14-Pin PDIP Tube 12.203
>LM5025MTC/NOPB LM5025MTC/NOPB NATIONAL SEMICONDUCTOR - No Voltage Mode PWM Controller 3A/1A 220kHz/580kHz 16-Pin TSSOP Tube 4.599
>TL2842BDR-8 TL2842BDR-8 NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 0V to 30V 200mA 500kHz 8-Pin SOIC T/R 0.5396
>TL3843P TL3843P NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 0V to 30V 200mA 500kHz 8-Pin PDIP Tube 2.3551
>TC648VUA TC648VUA MICROCHIP TECHNOLOGY - MSOP PWM Fan Controller 0.9761
>UC3845D-8 UC3845D-8 NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 200mA 500kHz 8-Pin SOIC Tube 1.4776
>UC3856DW UC3856DW NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 1.5A 220kHz 16-Pin SOIC Tube 8.298
>UCC2802D UCC2802D NATIONAL SEMICONDUCTOR - 8 Current Mode PWM Controller 5V 1000kHz Automotive 8-Pin SOIC Tube 2.4975
>UC2841DW UC2841DW NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 1A 500kHz 18-Pin SOIC Tube 21.139
>UCC35701D UCC35701D NATIONAL SEMICONDUCTOR - Voltage Mode PWM Controller 1A 700kHz 14-Pin SOIC Tube 9.378
>UCC2808DTR-1 UCC2808DTR-1 NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 1A 1000kHz 8-Pin SOIC T/R 2.7597
>TC642CPA TC642CPA MICROCHIP TECHNOLOGY - PDIP PWM Fan Controller 0.7835
>UCC2813D-5 UCC2813D-5 NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 1A 1000kHz 8-Pin SOIC Tube 3.3636
>TC652AGVUA TC652AGVUA MICROCHIP TECHNOLOGY - MSOP Brushless DC Fan Controller 2.598
>MIC2186YQS MIC2186YQS MICROCHIP TECHNOLOGY - Yes Current Mode PWM Controller 400kHz 16-Pin QSOP Tube 1.8358
>UC2843BD1 UC2843BD1 STMICROELECTRONICS - No Current Mode PWM Controller 1A 500kHz 8-Pin SO N Tube 1.0244
>TC647BEUA TC647BEUA MICROCHIP TECHNOLOGY - MSOP PWM Fan Speed Controllers With Minimum Fan Speed 3.439
>UCC2895Q UCC2895Q NATIONAL SEMICONDUCTOR - Resonant Controllers 100mA 1000kHz 20-Pin PLCC Tube 5.5246
>UC2843N UC2843N NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 200mA 500kHz 8-Pin PDIP Tube 2.5374
>UC2845BN UC2845BN STMICROELECTRONICS - No Current Mode PWM Controller 1A 500kHz 8-Pin PDIP Tube 0.638
>LT3752EFE-1-PBF LT3752EFE-1-PBF ANALOG DEVICES - Automotive Current Mode PWM Controller 100kHz to 500kHz Automotive 31-Pin TSSOP EP Tube 11.7969
>LTC3866IFE-PBF LTC3866IFE-PBF ANALOG DEVICES - 24 Current Mode PWM Controller 0.6V to 3.5V 30A 250kHz to 770kHz Automotive 24-Pin TSSOP EP Tube 10.3433
>UC2823DW UC2823DW NATIONAL SEMICONDUCTOR - Current Mode PWM Controller 1.5A 1000kHz 16-Pin SOIC Tube 7.882
>LM3524DMX/NOPB LM3524DMX/NOPB NATIONAL SEMICONDUCTOR - Yes Voltage Mode PWM Controller 60V 200mA 350kHz 16-Pin SOIC T/R market price
Someone has searched this part IC Chips and others have searched some relevant parts as the following:
NATIONAL SEMICONDUCTOR
-
NO
Voltage Mode PWM Controller 500mA 550kHz 16-Pin PDIP Tube
NATIONAL SEMICONDUCTOR
-
NO
Voltage Mode PWM Controller 1A 700kHz 14-Pin PDIP Tube
NATIONAL SEMICONDUCTOR
No
NO
Voltage Mode PWM Controller 3A/1A 220kHz/580kHz 16-Pin TSSOP Tube
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 0V to 30V 200mA 500kHz 8-Pin SOIC T/R
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 0V to 30V 200mA 500kHz 8-Pin PDIP Tube
MICROCHIP TECHNOLOGY
MSOP
NO
PWM Fan Controller
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 200mA 500kHz 8-Pin SOIC Tube
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 1.5A 220kHz 16-Pin SOIC Tube
NATIONAL SEMICONDUCTOR
8
NO
Current Mode PWM Controller 5V 1000kHz Automotive 8-Pin SOIC Tube
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 1A 500kHz 18-Pin SOIC Tube
NATIONAL SEMICONDUCTOR
-
NO
Voltage Mode PWM Controller 1A 700kHz 14-Pin SOIC Tube
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 1A 1000kHz 8-Pin SOIC T/R
MICROCHIP TECHNOLOGY
PDIP
NO
PWM Fan Controller
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 1A 1000kHz 8-Pin SOIC Tube
MICROCHIP TECHNOLOGY
MSOP
NO
Brushless DC Fan Controller
MICROCHIP TECHNOLOGY
Yes
NO
Current Mode PWM Controller 400kHz 16-Pin QSOP Tube
STMICROELECTRONICS
No
NO
Current Mode PWM Controller 1A 500kHz 8-Pin SO N Tube
MICROCHIP TECHNOLOGY
MSOP
NO
PWM Fan Speed Controllers With Minimum Fan Speed
NATIONAL SEMICONDUCTOR
-
NO
Resonant Controllers 100mA 1000kHz 20-Pin PLCC Tube
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 200mA 500kHz 8-Pin PDIP Tube
STMICROELECTRONICS
No
NO
Current Mode PWM Controller 1A 500kHz 8-Pin PDIP Tube
ANALOG DEVICES
Automotive
NO
Current Mode PWM Controller 100kHz to 500kHz Automotive 31-Pin TSSOP EP Tube
ANALOG DEVICES
24
NO
Current Mode PWM Controller 0.6V to 3.5V 30A 250kHz to 770kHz Automotive 24-Pin TSSOP EP Tube
NATIONAL SEMICONDUCTOR
-
NO
Current Mode PWM Controller 1.5A 1000kHz 16-Pin SOIC Tube
NATIONAL SEMICONDUCTOR
Yes
NO
Voltage Mode PWM Controller 60V 200mA 350kHz 16-Pin SOIC T/R

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