FAN8728

www.fairchildsemi.com FAN8728 Spindle + 4-CH Input PWM Motor Drive IC Features








                       !            !  " !  #$   "%  ""      &'(  $)*+ $,  $#  " "  ,-,.  Description  /012*1 "       "3 %  #      "  4 + %" + "  +    , "  "   %  & 5/!&5/!0/.6/60 "7" 48-QFPH-1414 Typical Applications



& "4 7   .  "4 7   & "4 7   0 7"  Ordering Information Device FAN8728 Package 48-QFPH-1414 Operating Temp −
5°C ~ 8°C Rev. 1.0.0 ©2002 Fairchild Semiconductor Corporation FAN8728 Pin Assignments           48  1 47 46 45 44 43 42 41 40 39   38 37 36 



 
    2  35 34 33 32 31  3 4   5 6 
 
  7 30

 8 29 9 28

     10 27  
 11 26 12 13  14  15  16  
17  18  19   20  21  22   23  24  25 2 FAN8728 Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Pin Name H1+ H1H2+ H2H3+ H3FG DIR SVCC1 VM1 CS1 PGND1 A3 A2 A1 SGND IN3+ IN3OUT3 IN2+ IN2OUT2 VM2 IN2+ IN2OUT2 DO1+ DO1DO2+ DO2PGND2 DO3+ DO3I/O I I I I I I O O I O O O I I O I I O I I O O O O O O O Hall1(+) Input Hall1(-) Input Hall2(+) Input Hall2(-) Input Hall3(+) Input Hall3(-) Input FG Output Direction SIGNAL VCC1 Motor Power Supply Current Sensor Power Ground 3-Phase Output 3 3-Phase Output 2 3-Phase Output 1 Signal Ground Op-amp CH3 Input(+) Op-amp CH3 Input(-) Op-amp CH3 Output Op-amp CH2 Input(+) Op-amp CH2 Input(-) Op-amp CH2 Output BTL CH1,2 Supply Voltage Op-amp CH2 Input(+) Op-amp CH2 Input(-) Op-amp CH2 Output BTL Drive 1 Output(+) BTL Drive 1 Output(-) BTL Drive 2 Output(+) BTL Drive 2 Output(-) BTL Power Gnd BTL Drive 3 Output(+) BTL Drive 3 Output(-) Pin Function Descrition 3 FAN8728 Pin Definitions (Continued) Pin Number 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name DO4+ DO4IN4 VREF4 VM4 VM3 SVCC2 VREF123 MUTE123 MUTE4 SS OUTS INSINS+ PC1 I/O O O I I I I I I O I I I Pin Function Descrition BTL Drive 4 Output(+) BTL Drive 4 Output(-) BTL CH4 Input BTL CH4 Reference BTL CH4 Motor Supply BTL CH3 Motor Supply BTL Signal VCC BTL CH1,2,3 Rference BTL CH1,2,3 Mute BTL CH4 Mute Spindle Start/Stop Opamp Spindle Output Opamp Spindle Input(-) Opamp Spindle Input(+) Phase Compesation Cap. 4 FAN8728 Internal Block Diagram MUTE4 (LOADING) FIN(GND) MUTE123 VREF123 SVCC2 INS+ INS- 48 47 46 45 44 43 42 41 40 39 38 37 H1+ H1- 1 VREF4 OUTS PC1 SS VM3 VM4 36 IN4 DO4DO4+ DO3DO3+ 2 35 Hall Amp H2+ H2H3+ H3- 3

  34 4 Absolute Values VM1 CS1 Current Sense Amp VM4 33 5  32 6 Output Current Limit VM3 31 PGND2 FG1X Generator Detection FIN(GND) Logic Reverse Rotation VM2 FIN(GND) FG DIR SVCC1 VM1 7  30 DO2DO2+ DO1DO1+ 8 29 9  28 Distributor 10 VM2 27 CS1 PGND1 11 26 OUT1 IN1- 12 25 Driver 13 14 15 16 17 18 19 20 21 22 23 24 SGND A3 A2 A1 FIN(GND) OUT2 IN3+ IN2+ IN3- OUT3 VM2 IN2- IN1+ 5 FAN8728 Equivalent Circuits FG Signal Output Phase Compensation Capacitor





 Current Detector Start/Stop 
 




BTL Drive Mute BTL Bias Voltage  




 


6 FAN8728 Equivalent Circuits (Continued) 3-Phase Rotational Direction Output BTL Drive Output

 


       

3-Phase Output BTL Drive Input 
   


7 FAN8728 Absolute Maximum Ratings ( Ta=25°C) Parameter Supply Voltage (BTL Signal) Supply Voltage (Spindle Signal) Supply Voltage (Motor) Supply Voltage (BTL Motor) Power Dissipation Operating Temperature Range Storge Temperature Range Maximum Output Current (Spindle Part) Maximum Output Current (BTL Part) Symbol SVCC2max SVCC1max VMmax VM2,3,4max Pd Topr Tstg IOMAXS IOMAXB Value 15 7 15 15 2.7note -35 ~ +85 -55 ~ +150 1.3 1 Unit V V V V W °C °C A A Note : 1. When mounted on 70mm × 1.6mm PCB (Phenolic resin material) 2. Power dissipation is reduced 21.6mW/°C for using above Ta = 25°C 3. Do not exceed Pd and SOA. Pd [mW] 3,000 2,000 1,000 0 Ambient Temperature, Ta [°C] 0 25 50 75 100 125 150 175 Recommended Operating Conditions ( Ta=25°C) Parameter Operating Supply Voltage (BTL Signal) Operating Supply Voltage (Spindle Signal) Operating Supply Voltage ( Spindle Motor) Operating Supply Voltage (BTL Motor) Symbol SVCC2 SVCC1 VM1 VM2,3,4 Min. 4.5 4.5 4.5 4.5 Typ. Max. 13.2 5.5 13.2 13.2 Unit V V V V 8 FAN8728 Electrical Characteristics (Ta=25°C, SVCC1=5V, VM1=8V) Parameter Circuit Current 2 START/STOP SS On Voltage Range SS Off Voltage Range HALL AMP Hall Bias Current In-phase in Voltage Range Minimum in Level TORQUE CONTROL Offset Voltage (-) Offset Voltage (+) In/output Gain FG FG Output Voltage (L) Input Voltage Range OUTPUT BLOCK Saturation Voltage (upper TR) Saturation Voltage (lower TR) Torque Limit Current DIRECTION DETECTOR Dir Output Voltage (L) VDIRL IFG=10uA 0.5 V VOH VOL ITL IO= -300mA IO=300mA RCS=0.5Ω 560 0.9 0.2 700 1.6 0.6 840 V V mA VFHL VFGR IFG=10uA Hn+, Hn- input D-range 1.5 0.5 4.0 V V ECOFFECOFF+ GEC ECR=1.65V ECR=1.65V ECR=1.65V, RCS=0.5Ω -100 20 0.56 -50 50 0.71 -20 100 0.84 mV mV A/V IHA VHAR VINH 1.5 60 1 5 4.0 uA V mVpp VSSON VSSOFF L-H Circuit On H-L Circuit Off 2.5 1.0 V V Symbol ICC2 Condition Start/Stop =5V Min. Typ. 6 Max. Unit mA 9 FAN8728 Electrical Characteristics (continued) BTL Drive Part (Ta=25°C, SVCC2=8V, VM2,3,4=8V, RL=24Ω) Parameter BTL DRIVE PART Quiescent Circuit Current CH Mute123 Off Voltage CH Mute123 On Voltage CH Mute4 Off Voltage CH Mute4 On Voltage Output Offset Voltage Maximum Output Voltage1,2,3 Close Loop Voltage Gain Ripple Rejection Ratio Slew Rate 1,2,3 Output Offset Voltage4 Maximum Output Voltage4 Close Loop Voltage Galin Ripple Rejection Ratio4 Slew Rate 4 OP- AMP Input Offset Voltage Input Bias Current High Level Output Voltage Low Level Output Voltage Output Sink Current Output Source Current Open Loop Voltage Gain Ripple Rejection Ratio Slew Rate Common Mode Rejection Ratio VOF IB1 VOHOP VOLOP ISINK ISOURCE GVOOP RROP SROP CMRROP f=1kHz, VIN=-75dB f=120Hz, VIN=-20dB f=120Hz, 2Vp-p f=1kHz, VIN=-20dB -20 11 5.5 4.5 75 65 1 80 +20 300 0.1 mV nA V V mA mA dB dB V/us dB ICC3 VMOFF123 VMON123 VMOFF4 VMON4 VOF1,2,3 VOM1,2,3 GVC1,2,3 RR1,2,3 SR1,2,3 VOF4 VOM4 GVC4 RR4 SR4 pin42= Variation plin42 = Variation pin43 = Variation pin43 = Variation f=1kHz, VIN=-0.1Vrms f=120Hz, VIN=-20dB f=120Hz, 2Vp-p f=1kHz, VIN=-0.1Vrms f=120Hz, VIN=-20dB f=120Hz, 2Vp-p 2.5 2.5 -50 3.6 10.5 -50 6.0 10.5 20 4.0 12.0 60 1.0 6.5 12.0 60 1.0 1.0 1.0 +50 13.5 +50 13.5 mA V V V V mV V dB dB V/us mV V dB dB V/us Symbol Condition Min. Typ. Max. Unit CH1,2,3(SVCC2=8V VM2=5V,RL=8Ω) CH4(SVCC2=8V VM4=8V,RL=12Ω) 10 FAN8728 Calculation of Gain & Torque Limit Current VM1 IO VM1 RCS Current / Voltage Convertor − Vin EC ECR + Gm Absolute Values + + + + Vmax − VM Max. output current limiting H1 H2 Driver R1 − − VS Output Current sense + CS1 (Pin 11) Negative Feedback loop U V W IO Power Transistors Commutation Distributor H3 8-,99  "  % &  " !) " %:    60.355
Gain 













R CS .: " 3 34  " "    ,98.Vmax 350 [ mV ]

Itl [ mA ] 





































R CS R CS Application Information 1. Mute Function ) &  .  ;  "   %+        " " %"MUTE123,4 ON Voltage MUTE123,4 OFF
Voltage *      &   " "  "  %       ;    "   (0    %   "  3  )    " "   3 )?9°+         3 " -    %  D     " " " 3 VRNF [V] Reverse Forward Rotation Ec < ECR Forward rotation Stop after detecting reverse rotation Ecoff− Ecoff+ Ec > ECR 3 mV -50 0 +50 ECR-EC[mV]     ( %  D  " /& " 8-9. F ,-,. 5. Thermal Shutdown (TSD) Function ;   >    " "   3 )?9°+        " " +    >     %" %%  3 )#8°+       3 7   - 6 "     7"  "" % 3 *9°- 6. Rotational Direction Detecting Function H2+ H2− + − D R 8 Q DIR Rotation EC < ECR Forward Reverse DIR Low High CK H3+ H3− + − D-F/F EC > ECR   %    " " %  &      37  + " "   3 3 -      %  &  3    37     %" %   " " 5   -      " "" 3 $)+ $*  $,  "  7- 6%   " ""      + $) → $* → $,+ %    " +     %" %   " ""  3 " " 3 H1 H2 H3 ( a) 14 FAN8728 6 " 7+ %   " ""      + $,→ $*→ $)+ %  % +     %" %   "  ""  3 " "  :  - H1 H2 H3 ( b) 6  " " 3 +   % $*   %  " % $, "   % GH+  $  % G3H-        4 "  % "   - 15 FAN8728 7. REVERSE ROTATION PREVENTING FUNCTION EC ECR + Current Sense Amp H2+ H2− + − D CK D-F/F Gain Controller Driver M Q H3+ H3− + −   %    "  %       + " "   3 3 + 37   " 3 - " D 7    " +  5   A 3  "   " %%      " " / +  "   "  %     % ;   & "   %  + (H( " "  "      5 "  &- /"    % (H(  "  + & "" + " "+     "     "  -      & %      "  +    "   "" % "  D - 6"     "  """  3 Reverse Rotation Preventer ECECR Brake and Stop Stop Rotation Forward Reverse H2 H L H3 H→L H→L D-F/F H L DIR L H 16 FAN8728 8. HALL INPUT OUTPUT TIMMING CHART  , "  " "  %      % "  "    : " +    " " %   %   3 - /%   " "             +    " "        +     "     -  " " %     "+    +       " 3 - H1 + H2 + H3 + A1 output current A1 output voltage A2 output current A2 output voltage A3 output current A3 output voltage 17 FAN8728 9. FG OUTPUT FUNCTION    +    "  3  % " %  &+ "     37 3 I ""      %" %   " ""-      " " " 3 - FG OUTPUT (FG) , Pin7 + H1 − 18 FAN8728 Typical Performance Characteristics Vcc vs Icc2 10 8 Icc2(mA) 6 4 2 0 4.5 4.75 5 Vcc(V) 5.25 5.5         

  
  Vinvs Vout 6 4 0 -2 -4 -6 0 0.5 1 1.5 2 2.5 Vin (V) 3 3.5 4 4.5 5 Gcv(dB) 14 13.5 13 12.5 12 11.5 11 10.5 10 4.5 Vcc vs G cv Vout(V) 2 6.5 8.5 Vcc(V) 10.5 12.5 Ins+vs Itl 0.8 Icc2(mA) 0.6 Itl(A) 0.4 0.2 0 0 0.825 1.65 Ins+(V ) 2.475 3.3 10 9 8 7 6 5 4 3 2 -40 Tem vs Icc2 p -20 0 20 40 60 80 100 Tem
p( ) 19 FAN8728 Typical Performance Characteristics Temp vs Icc3 30 25 Icc3(mA) 20 15 10 5 0 -40 Tem vs ITL p 850 800 ITL(mA) 750 700 650 600 550 -40 -20 0 20 40 60 80 100 -20 0 20 40 60 80 100 Temp( ) Trm
p( ) Tem vs V p om (V vcc=8V L=12 O ) cc=P ,R hm 7 Vom(V) 6.75 6.5 6.25 6 -40 -20 0 20 40 60 80 100 Tem
p( ) 20 FAN8728 Test Circuits        


48 PC1 47 INS+ 46 INS- 45 OUTS 44 SS 43 MUTE4 42 MUTE123 41 VREF123 40 SVCC2 39 VM3 38 VREF4 V\M4 37 36 IN4
      1 2 3 4 5 6 H1+ H1H2+ H2H3+ H3- DO4- 35 DO4+ 34 DO3- 33 DO3+ 32 PGND2 31  
 
   
 7  8 FGX3 DIR SVCC1 VM1
 DO2- 30 DO2+ 29
 
 
    9 10 DO1- 28 DO1+ 27 OUT1 26 OUT3 SGND OUT2 IN2+ IN3+ IN1+ IN3IN2VM2 A2 A3 IN1- 25    
11 CS1   12 A1 13  PGND1 14 15 16 17 18 19 20 21 22 23 24        

         
  
 
          
21 FAN8728 Application Circuits . &    !"# $%"& !"# " "   48 1 HALL1 2   47 46 45   44 43   42   41  40  39  38 37 



 
 36 '()!* !"#      35 M   3 HALL2 4    33  34 M 5 HALL3 6 31 32  
  7 
 


 30     8 29
 9

    
          24 28   10   
 13   27 11 26  12 25 14 15 16 17 18 19 20 21 22 23   22  
 
 FAN8728 Application Circuits %%   &    !"# $%"& !"# " "   48 1 HALL1 2   47 46 45   44 43   42   41  40  39  38 37 



 
 36 '()!* !"#      35 M   3 HALL2 4    33  34 M 5 HALL3 6 32  
 31
  7 
 

 30     8
 29 9

      
       24  28   10   
 13  27 11 26   12 25 14 15 16 17 18 19 20 21 22 23    
 
 23 FAN8728 Package Dimensions (Unit: mm) 48-QFPH-1414 17.20 ±0.30 14.00 ±0.20 17.20 ±0.30 14.00 ±0.20 #48 #1 +0.10 0.30 -0.05 0.10MAX (0.825) 0.65 3.00MAX 2.60 ±0.10 +0.10 0.20 -0.05 (4.85) 0~8 ° 0.10MAX 0.00~0.25 0.80 ±0.20 24 FAN8728 25 FAN8728 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. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 1/17/02 0.0m 001 Stock#DSxxxxxxxx  2002 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.