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Part: FAN8408DTF
Category:
Description: FAN8408D - FAN8408D
Company: Fairchild Semiconductor
Datasheet: Download FAN8408DTF datasheet File size : 400 kB
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FAN8408D
2 Phase Half Wave BLDC Motor Driver
Features
· · · · · · · A wide range of operation voltage: 4V to 15V Built-in motor lock detector. Automatic restart function Hall output for a motor speed detection Built-in thermal shut down circuits Built-in reverse current protection diode Compact package: 8-SOP-225
Description
The FAN8408D is a monolithic integrated circuit, and suitable for DC cooling fan motors.
8-SOP-225
1
Typical Applications
· DC cooling fan motor
Ordering Information
Device FAN8408D FAN8408DTF Package 8-SOP-225 8-SOP-225 Operating Temp. -25°C ~ 85°C -25°C ~ 85°C
Rev.1.0.4
©2002 Fairchild Semiconductor Corporation
FAN8408D
Block Diagram
OUTB
1
3
LD
2 Commutation & Control & TSD
HO
OUTA
7
VCC GND
4 8 5 6 IN+ IN-
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 Pin Name OUTB HO LD VCC IN+ IN- OUTA GND I/O O O I I O Pin Function Description Motor output B Hall output Triangle pulse generator for lock detector and automatic restart Supply voltage Hall input + Hall input - Motor output A Ground Remark Open Collector -
2
FAN8408D
Equivalent Circuits
Descript i on OUTB OUTA Pin No. 1 7
1 7 Commutation
Internal Circuit
HO
2
2 Commutation
LD
3
3 Lock detector & Automatic restart
Commutation
VLDCP
VLDCL
IN+ IN-
5 6
5 6 Commutation
3
FAN8408D
Absolute Maximum Ratings (Ta = 25°C)
Parameter Maximum power supply voltage Maximum power dissipationnote1 Thermal resistancenote1 Maximum output voltage Maximum output current Hall output current Hall output withstanding voltage Maximum hall input ac level Operating temperature Storage temperature S ymbo l VCCMAX PDMAX JA VOMAX IOMAX IHO VHO VHACMAX TOPR TSTG Value 18 429note2 620note3 291.61note2 201.52note3 30 1.2note4 10 36 6 -25 ~ 85 -55 ~ 150 Unit V mW ° C/W V A mA V V °C °C
Note1: PCB Condition: Thickness(1.6mm), Dimension(76.2mm * 114.3mm) Refer: EIA/J SED 51-3 & EIA/J SED 51-7 Note2: Air condition (0m/s) Note3: Air condition (3m/s) Note4: Should not exceed PD or ASO value
Power Dissipation Curve (Air condition = 0m/s)
0.5 0. 45 0.4 0. 35 0.3 0. 25 0.2 0. 15 0.1 0. 05 0 0 20 40 60 80 Tc or Ta[°C] 100 120 140 160
4
Pd[W]
FAN8408D
Air Speed & JA
350 300 JA[°C/W] 250 200 150 100 50 0 0 1 2 3 Air Speed[m/s] 4 5 6
Recommended Operating Conditions (Ta = 25°C)
Parameter Function compensation operating voltage Symbol VCC M in. 4.0 Typ. - M ax. 15.0 Unit V
Electrical Characteristics
(Ta=25°C, VCC=12V unless otherwise specified) Parameter Supply current Lock detector charging current Lock detector discharging current Lock detector charging/discharging ratio Lock detector capacitor clamp voltage Lock detector capacitor comparator voltage Output low level voltage Output leakage current Output zener voltage Hall output pin low level voltage Hall output pin leakage current Hall input dc range Hall input offset Symbol ICC ILDC ILDD R CD VLDCL VLDCP VOL IOL VOZ VHLL IHLL VHDC VHOF IO=10mA VREF=6V IO=200mA Clamp current=10mA Conditions When output is off. VLD=1.8V VLD=1.8V RCD=ILDC/ILDD Min. 2 .38 0 .48 3.0 2.4 0.7 28 1 -10 Typ. 3 .40 0 .68 5 .0 2.85 0.99 0.9 0 30 0.2 0 M ax. 3.0 4 .42 0 .88 7.0 3.3 1.2 1.2 10 32 0.5 10 VCC2V 10 Un it mA µA µA - V V V µA V V µA V mV
5
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