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Part: BA6817FS
Category:
Power Management
-> Motor Controller/Drivers
Description:
Company: ROHM Electronics
Datasheet: Download BA6817FS datasheet File size : 150 kB
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Datasheet text preview:
Motor driver ICs
Fan motor driver IC
BA6817F / BA6818FS
The BA6817F and BA6818FS are 24V motor drivers for 2-phase, half-wave fan motors. The ICs have lock detection and automatic restart functions. In compact SOP8 (BA6817F) and SSOP-A16 (BA6818FS) packages, the ICs reduce the number of external components required. FApplications 2-phase motors such as fan motors FFeatures 1) Built-in power transistors. 2) Lock detection and automatic restart functions. 3) Thermal shutdown circuit. FAbsolute maximum ratings (Ta = 25_C)
4) Alarm output pin. (BA6817F / BA6818FS) 5) Hall signal output pin. (BA6818FS)
FRecommended operating conditions (Ta = 25_C)
717
Motor driver ICs
FBlock diagram
BA6817F / BA6818FS
FPin descriptions
718
Motor driver ICs
FHall input / output truth table
BA6817F / BA6818FS
FInput / output circuits
FElectrical characteristics (unless otherwise noted, Ta = 25_C)
719
Motor driver ICs
FCircuit operation The BA6817F and BA6818FS have motor lock detection and automatic restart circuits. The timing of lock detection and automatic restart is determined by the external capacitor connected to the LD pin. The charge time of the external capacitor is given by : ton (Charge time)= toff (Discharge time)= C S (VLDCL*VLDCP) ILDC C S (VLDCL*VLDCP) ILDD
BA6817F / BA6818FS
(Typical value) where VLDCL is the LD-pin clamp voltage (2.45V), (1.05V), VLDCP is the LD-pin comparator voltage (2.64µA), ILDC is the LD-pin charge current (0.48µA), ILDD is the LD-pin discharge current C is the capacitance of the LD-pin external capacitor. For C=0.47µF, for example, the charge (output ON) and discharge (output OFF) times are 0.24s and 1.37s, respectively.
The timing chart for a motor lock occasion is shown in Fig. 1.
720
Motor driver ICs
FApplication example
BA6817F / BA6818FS
721
Others parts begin by ba
BA-1 BA-2 BA-3 BA-4 BA-5 BA-6 BA-7 BA-8 BA-9 BA-10 BA-11 BA-12 BA-13 BA-14 BA-15 BA-16 BA-17 BA-18
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