New Reduce external components and improve reliability For 3.5inch HDD Motor Comb IC／AN8428GAK ■ Overview Unit : mm AN8428GAK is motor comb IC for 3.5inch HDD. By new retract circuit ,reduce external components and shorten the brake time of the disk to improve reliability of HDD . Spindle motor sensor less linear drive. VCM linear drive , PWM-DAC control . Built-in Retract , 12 V/5 V/3.3 V power monitor, 3.3 V-Regulator. 80-pin TQFP package with exposed heat think . ■ Features ●By new retract circuit ,reduce external components and shorten the brake time 1/2 of the disk to improve reliability of HDD . ●Built-in shock sensor amplifier for mechanical shock protection and 3.3 V regulator for logic semiconductor . ●10 dB acoustic noise reduction by trapezoidal current on spindle motor drive . ●80- pin TQFP package with the smallest thermal resistance in the industry . Meet to increase speed of HDD higher 30 % than previous. HQFP080-P-1414 ■ Principle functions (1)Spindle motor sensor less linear drive :2.7 A peak current drivers , Ron=1.1 Ω (2)VCM linear drive : 1.8 A peak current , Ron=1.5 Ω (3)Retract function exists (4)Built in 12 V/5 V/3.3 V power monitor (5)Built in shock sensor amplifier (6)Built in 3.3 V regulator ■ Applications 3.5 inch HDD The products and specification are subject to change without any notice. Please ask for the latest Product Standards to guarantee the satisfaction of your product requirements. 1.Kotari Yakemachi, Nagaokakyo, Kyoto, 617-8520 Japan M00389AE Tel. (075)951-8151 http://www.mec.panasonic.co.jp New publication, effective from May.8.2000 Vcc5 59 XN 4502 100 0.1 µF,18V VCC5 VCCA12 VCC1S12,2S12 VCC3.3 BSTCP2 BSTCP1 0.047 µF 2SB1073 VCCV12 ■ Standard application 10 µF 10 µF BSTFLT 58 57 7,18,44,45 78 10 GNDSUBA XN4502 BOOSTER 54 POWER ON RESET 9 POR5VADJ 8 POR12VADJ 11 POR3.3VADJ + 3.3V out － 50 0.68 1800pF 70 0.047 µF 1.32K + TIMER 3VREGCNTL 3VREGBG － 71 4.125K 0.01 µF + 2 SHOCK SENSOR － SHKIN 1800pF 3 FILTER SHKFLT VREF RETRACT 79 VREF 12 CPOR SHKOUT PORN VREFOUT 13 CPOR SHOCK AMP RETRACT & VCM 75 VREF 0.01 µF VCC4 － 23,24 VPCNTL VISENL 65 VISENH 66 VISENS1 5 VFLTOUT 1K Ω 50 THERMAL WARNING 15 6 VCM MODE VPCNTL VFLTINP 0.33 Ω VCMP 62 X4 TEMP 0.022 µF + VCMREF 10k 0.01 µF VOICE COIL MOTOR VCMINP 4 390pF 1800pF 77 VIPWMH VIPWMH PWM DAC VIPWML VIPWML 10k FAILSAFE FAIL SAFE RETRACT RETRACT RETRACT 17 SMODE1 52 SPINDLE MODE SMODE1 SCNTL1 69 33, SCNTL1 SCNTL2 68 COMMUTATION SCNTL2 SCNTL3 56 SPINDLE CURRENT CONTROL OUTPUT STAGE 67 220K VCMN GND-V 16 1 µF LOGIC DEVICE 21,22 25,26 + VREF 14 19 ,20 － 76 RX RETRACT ADJ RETPOWER RY SDRVN SDRVU MA10702 34 41, 42 SDRVV SCNTL3 SIPWM 51 SENU 74 SENWIS 72 SIPWM SPINDLE MOTOR FILTER SENU SENWIS SDRVW BEMFCOMPARATOR SDRVU 29,30 SDRVV SENV 73 46 47 28 VCC5 SPWMTC 31 53 PWM 32 220pF 35 36 37 680pF 0.047 µF 49 0.047 µF 43 SHPWR 48 SCOMP 55 SPWMFLT 1 SLOPEC 34k SISENL SDRVW SENV ANALOG GND 4.7µF 0.47 µ F SISENH SISINK1 SISINK2 SISINK3 SISINK4 SISINK5 SISINK6 0.18 Ω ■ Maximum Ratings PARAMETER SYMBOL Supply voltage +3.3 V Supply voltage +5V Supply voltage +12V Output voltage (Spindle) Output voltage (VCM) Ratings unit Vcc3.3 - 0.3 ～6.0 V Vcc5 - 0.3 ～6.0 V Vcc12 - 0.3 ～13.5 VSDRV - 0.3 ～15 V VVCMN,VCMP - 0.3 ～15 V V Spindle Motor Peak Output Current I Ospeak 3.0 A Voice coil Motor Peak Output Current I Ovpeak 2.0 A ■ Supply voltage range VCC3.3 3.0 V ～ 5.5 V V VCC5 4.5 V ～ 5.5 V V +12V Supply voltage range VCCS12 10.8 V ～ 13.2 V V +12V Supply voltage range VCCV12 10.8 V ～ 13.2 V V +12V Supply voltage range VCCA12 10.8 V ～ 13.2 V V +3.3 V Supply voltage range +5V Supply voltage range ■ Electrical Characteristics（Ta=25 ℃±2 ℃ unless otherwise specified ） PARAMETER +3.3 V Supply Current +5V Supply Current +12 V Supply Current SYMBOL I CC3.3 I CC3.3 S I CC5 I CC5S I CC12 I CC12S Conditions Linear mode Sleep mode Linear mode Sleep mode Linear mode Sleep mode min typ max － － － － － － 1.1 1.1 16.0 14.0 35.0 10.0 3.0 3.0 20.0 － 55.0 － unit mA mA mA ［Power Monitor Comparators］ 12V Threshold voltage 5V Threshold voltage Vt12 8.7 9.0 9.3 V Vt5 4.2 4.3 4.4 V ■ Electrical Characteristics（ （Ta=25 ℃±2 ℃± ℃ unless otherwise specified ） PARAMETER SYMBOL Conditions unit min typ max － 0.65 1.1 Ω ［SPM block］ ］ Total Output on Resistance Rds( on) Iout =2.7 A Voltage Ratio SPWMFLT/SISENH KSP 4.8 5.1 5.4 V/V Voltage at pin SISENH for 100% duty cycle V100 0.33 0.348 0.376 V Voltage at pin SISENH for 50% duty cycle V50 0.160 0.18 0.200 V Voltage at pin SISENH for 5% duty cycle V5 － 0.018 0.026 V Voltage at pin SISENH for 0% duty cycle V0 － 0.0 2.0 mV 0.55 0.87 1.15 V 15 80 130 mA 31.5 32 32.7 ［VCM block］ ］ VRET2 Vretract Regulation Irtrct2 Irtrct2 Current Ratio between MSB／LSB Ratio Time of Crossover Distortion TCRO Supply OFF VBEMF=2V VCM=10.5 Ω Ramp Input VCMINP 20 μs μs － 2 0.93 1 1.07 mA/mA 0.97 1.0 1.03 mA/mA － 1.0 1.5 Ω -28 0 28 mA -1 － 1 nA Gmshk - 5.9 - mS Output voltage Regulation VCC3V3 3.168 3.33 3.49 V Load Regulation ΔVLDR - 33 - mV Symmetry VCM Drivers VCMP , VCMN Ratio I2 I1 Ratio Linearity VCM Drivers VCMP , VCMN Total Resistance (Source＋Sink＋Isolation) VCM Output Drivers Offset Current = I 2- I 0 I 1- I 0 I 2=I RVCM at Duty Cycle =10% I 1=I RVCM at Duty Cycle=90% RS=0.33,R 1=10k,R2=6.6k, RL =10 Ω I 2=I RVCM at Duty Cycle =30% I 1=I RVCM at Duty Cycle=70% I 0=I RVCM at Duty Cycle=50% RS=0.33,R 1=10k,R2=6.6k, RL =10 Ω RDSON25 Ios VIPWMH& VIPWNL at 50% Duty Cycle RS=0.33, R1=10K, R2 =6.6 K, R L=10 Ω 5 [Shock sensor] Input Current of Shock Sensor Amplifier Gm of Shock Sensor Amplifier I SHKIN [3.3 V－ －Regulator] ILOAD=0～4mA