DC Brushless Fan Motor Drivers
TECHNICAL NOTE
DC Brushless Motor Drivers for Cooling Fans
Speed Controllable Single-phase Full-wave DC Brushless Fan Mo...
Description
TECHNICAL NOTE
DC Brushless Motor Drivers for Cooling Fans
Speed Controllable Single-phase Full-wave DC Brushless Fan Motor Drivers
BD6709FS, BD6718FV, BD6721FS, BD6722FS
●Description This is the summary of models that suit for 12V speed controllable fan for desktop PC and general consumer equipment. They employ Bi-CDMOS process, and realize low ON resistance, low power consumption. They incorporate lock protection and automatic restart circuit, current limiting circuit.
●Features 1) Power Tr incorporated (BD6709FS、BD6721FS) 2) Pre-driver compatible for external Tr (BD6718FV) 3) Low side power Tr incorporated half pre-driver (BD6722FS) 4) Current limiting circuit 5) PWM soft switching driver (BD6721FS、BD6722FS) 6) Soft start circuit (BD6722FS) 7) Lock protection and automatic restart circuit 8) Rotating speed pulse signal (FG) output 9) Lock alarm signal (AL) output (BD6718FV、BD6721FS、BD6722FS)
● Application For 12V fan for desktop PC, server and general consumer equipment
●Lineup
12V speed controllable single-phase full-wave
Soft switching not available Soft switching available
Power Tr incorporated BD6709FS
Pre-driver
BD6718FV
Power Tr incorporated BD6721FS
Half pre-driver
BD6722FS
Jan. 2007
●Absolute Maximum Ratings
◎BD6709FS
Parameter
Symbol
Supply voltage
Vcc
Power dissipation
Pd
Operation temperature
Topr
Storage temperature
Tstg
Output current
Iomax
FG signal output current
IFG
FG signal output voltage
VFG
Junction temperature
Tjmax
* Red...
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