FAN8461G Fairchild Semiconductor, FAN8461G Datasheet
FAN8461G
Related parts for FAN8461G
FAN8461G Summary of contents
Page 1
... CPU Cooling Fans • Instrumentation Fans • Desktop PC Fans ©2003 Fairchild Semiconductor Corporation www.fairchildsemi.com Description The FAN8461G is a single phase BLDC motor driver and it’s typical application is DC cooling fans with wide range of supply voltage(3.3/5/12/24V). Ordering Information Device Package ...
Page 2
... FAN8461G Block Diagram VCC OUT1 4 OUT2 6 GND 5 2 Commutation & Control & TSD Lock Detection & V LDCP Auto Restart V LDCL ...
Page 3
... I/O Pin Function Description A Hall input - Hall input + A Sawtooth wave generator for lock detector A and automatic restart A Motor output 1 P Ground A Motor output 2 P Motor power supply P Logic power supply O Alram output O Speed output FAN8461G Remark - - - - - - Open collector Open collector 3 ...
Page 4
... FAN8461G Absolute Maximum Ratings ( ° C) Parameter Maximum power supply voltage Thermal resistance Maximum power dissipation Maximum output voltage Maximum output current Maximum output peak current Maximum FG/Alarm output current FG/Alarm output sustain voltage Hall output withstanding voltage Operating temperature Storage temperature ...
Page 5
... Equivalent Circuits Description Pin No. Hall input Output FG/ Internal Circuit VCC 1 VCC FAN8461G 2 5 ...
Page 6
... FAN8461G FAN8461G Electrical Characteristics (Ta = 25° 12V unless otherwise specified) CC Parameter Total Supply current Lock Detector & Auto Restart LD charging current LD discharging current LD clamp voltage LD comparator voltage Output Stage High side output saturation voltage Low side output saturation voltage Speed output(FG) & Lock Detection Output(AL) ...
Page 7
... LDCL CLD ramps up again and one of two outputs is turned on depending on locked rotor position during T charging repeat until locked conditon is removed, or FAN8461G is powerd down. The overall time chart is shown in figure.1. The auto- retry time(T ), the motor protection time(T ON external capacitor, C and each value can be calculated as follows ...
Page 8
... FAN8461G Rotor LDCL V LDCP LD Tzero OUT2 OUT1 Tlock rotation OFF ON Motor Lock Locked Released Figure 1. Overall Timing Chart ...
Page 9
... TSD off:The circuit can be reactivated and begin to operate in a normal condition. (Typ. 150° IN FAN8461G Ri Hall 1 Sensor IN- Figure 2. Hall Sensor Interface Figure 3. Hall Amplifier Input Range OUT FAN8461G can be used to H1 TACO Remark L ROTATING LOCK 9 ...
Page 10
... FAN8461G Typical Application Circuits 1 VCC OUT1 4 OUT2 6 GND 5 10 Commutation & Control & TSD Lock Detection & V LDCP Auto Restart V LDCL ...
Page 11
... Package Dimensions (Unit: mm) FAN8461G 11 ...
Page 12
... FAN8461G Typical Performance characreristics VCC current consumption VCC[V] 12 2.5 2.0 1.5 1.0 0.5 0.0 0.0 0 Low side TR saturation voltage High side TR saturation voltage VS=VM=12V 0.2 0.3 0.4 0.5 0.6 0.7 Motor current[A] ...
Page 13
... FAN8461G 13 ...
Page 14
... FAN8461G DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...