AN8221FB

AN8221FB PANASONIC | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 13

Technical content

HDD Sensor-less Motor Driver IC i Overview Unit: sam AN8221FB is a sensor-less motor drive IC which BS) Fs) requires no sensors like a Hall element of spindle motor Adiessnuee a tt employs the soft switch system of three-phase full a ata 3 wave drive. oa et : 5, 32 @ Features cs =o + Soft switch systom (snubber-less) “mn yau + External/intemal clock change-over allowed HHbbe Woooe, | + Small current in stand-by mode (typ. 10 A) si Eas : ee Sean curvent (cult curert) > Amex. a henna aeEE + Current control and Thermal protective circult provided max0 42-pin QAP Package (QHPOR-P-1010)

PSL. TRU Yet srt, & cro

@ Pin Descriptions Pate | Symbol [ Pinname Fata. | Symbol _| Pin name T | _U_ [Usha ouputtenninat | 23 | SCI | Owelletion cca erin 2 |v | Vepase uputteminat [24 | —0SC2 | Osan cei vermin 2 3 | _W | Wephase ouputtemis’ [25 | COM | Newnl point detection erin 4 || 26 |

6 Power ground | 28 | Signal ground

7 | 29 | 8 | 30 | 9 [8G |Sipmlgoend 31 | Wi _| Wi BEM pet emia 10 | Van | Montor eonins't [52 | V1 |V1 BEM pet enna | Yow | Monitorteminnt? | 33 | U1 | U1 BEF inet terminal 12 | w2 | Wowarefomstapingoxpettemind || 34 | FG | FG oupat terminal 13 | V2_[V2waveform sping owtput terminal [35 | SDO | Str/Deection sching op terminal 14 | U2 [Uremeim taping opuiemint [36 | __[NC 15 | Al _ | Winelomstopig pedreglaiontemind || 37 | CLK | Extemal clock input terminal we] Nc 38 | FR _| Nee mm vig id 17 | Pot [Phase compensation comin) | 39 | BR | Brake vrminl 18 | EAO | Ecoramp. ouput minal [40 | Voc | Supply voltage trial 19 [BAL [Error amp. reverse inpatterminal_ || 41 | CS __ | Current detection terminal 20 | Vrer_ [Voltage monitor terminal ||| 42_| IC __| Beermalimeral cock switching ein 21] Vr _| Votiage monitor terminal? 43 | SDE | Sec rein cuiog rind 22 [ss | Sund-by/sc-up terminal] 44 | SDI_| StaryDetection swiaching terminal Bi Absolute Maximum Rating (Ta=25°C) Supply voltage Poe Of BS Vv Supply current a ee Motor output current mA Mate peak ouput cnet ™= es Carrent detection inpat current | topeak [Om Curent detection peak impor current™= | Kexpeak [+1000 mA Motor omtpat voltage v =— pes [sevens Note) peak “05sec or less @ Recommended Operating Range eee apply volage Ce | 45¥ 0550 204

@ Electrical Characteristics (Voce=5V, Ta=25+2T) Parameter |_Symbol_[' Condition «| min] op | max | Unit Stand-by supply current LIne [Vis=42VSSdYS |S] 0 |g Set-up supply current | ter [vsmosv | — | 0] 15] ma Error Amp. Inpat bias current [| ts [CdS | [| io] ma BEMF Detection Input bias current |_ tu Tacetines eer forlacusandudvane| —08 | —02| 08] yA commoner [we | fosf—] vey osc Charging/Discharging current Ke ey $$ 3 “a Oscillation frequency error | toe Tosa || 30] 37) me FG Output high voltage |_Vws [iw=-0smA |] 42] — | Vv Output low voltage |_vuo [ho=osma | — | 02] os| v Drive Output System “Wagyeivatwer) | var [w= | — | | iz] v Off-time leak current [wo [Oo SSC*d 10 [it | 00] pa Drive System Drive gain ee es Current limiter voltage | Va | Ri=20K, R.=20K | ass | 0395 | ons] v Current limiter delta voltage | Va | R:=20K, R=OOK | -—-30| 0] 30] mv Trapezoid Wave Shaping Block Extemal CLK Gime ouput sourcecureat_ | Inc [| «| 400 | — 300] 200] wr Extemal CLK time outpet sink cureat | tue [|S | — | 550] WA Intcenal CLK time output source current [Yue [| id) | — | 7] Invemal CLK time oupursinkcurent | te | | S| — | 82] Internal CLK time output dettacurent | dhe | dtic=Inctic ————~«| 02 | — | 35| pA Off-time leak current [om fo os Tot os pa Test voltage output block [ve [oO aster] os iv Test Monitor Voltage Test voltage 1 es ee = Test voltage 2 Povme [2 [eas av Al Terminal Input low curreat | ka [input Votage=05V | —140 | -100| —60] pa SDO Terminal Output high voltage [Veo [R=sK sas] 6] — ]V Ourpat low voltage | vue [R=s0K dT — | om] on] Note) Voc= SV unless otherwise specified. 563

AN8221FB \\Cs for Motor ee eee Wl Electrical Characteristics (cont.) (Voc=5V, Ta=25+2T) FR Terminal put high voltage es ee 2 ee Input low voltage [ve | | S| ~ J ost ov Tnput high current [ten | Input vottage=20v | 55 | no | 220 | A Input low current [tem | Input vottage=oav —[ -120 | —70] 4s] wa BR Terminal Inpat low voltage [ove [CT of ~ | os} Topat high current [toe | Inpatvoliuge=20v_ | Ss | to | 220] uA Input low current [tun | Inporvoliage=osv [= 120 | ~-70 | -45| wa ENC Terminal Tnpat high volage ee 9 Input low vokage [wm | +t ef —'T| ost vy Input igh caren | tenc | tapuevotnge=zov | 35 [uno] 20 [pa Input low current [tux | imputvotuagesasy | -120 [0 | as | na SDE Terminal input high vokage [vw [OP a ee] Input high current [Tue | Input vottage=20v_ | ss] of 220] nA Input low current [soe | tnput vottage=osv | -120 | 70-45 nA SDI Terminal Tnpot high voltage [ve [oC tT Tv] Inpot low voliage [Mim {| | Co] ~ | et Input high current [Tus | Input voitage=2.0v [| ss | no | 220 | WA Input low current [tes | Inparvottage=oav | -120[ -70[ =4s| nA CLK Terminal put high voltage [vex [CT Tee] Input low voltage [Mo [| | to | ~ | ot Tnpat high current [Imax | Inpatvolimge=20v | ss | to | 220 | HA Tnpet low current tua | tapurvotge=o8v | —129 | —70 | —45 | ya S/S Terminal Inpet high vollmge es ee ee Tapat low voltage [Ms | CT of — | stv nput high current [lass | Inputvotuge=a2v | 15 | -4 | — | na Tnpat low current [kiss | Inputvonage=osv | —soo | -iso[ — |» Brake Block Brake time sarration volage (Vestower) | Vaw [lo=700ma J — oa] os] vv Logic Block Logic check A [ta __| Extermal CLK used | 350 | — | $50 | Logic check A [tn | External CiKused | —400 | — | =200] 4A Logic check A [tu | Exemacikued | -o8| o| os] wa Logic check B [tan | mera OSC2used | 8 | — | 152] wa ogic check B [tn | Imemal sca ued | = 13 | — | =7 | ogic check B [tes | ternal Oscruses | 08 | 0] as | 304

—_—]. @ Electrical Characteristics (cont.) (Vec=5V, Ta=25+2T) Parameter [_symbor [Condition [min [yp | max | uni BEMF Detection Detection sensitivity level [Vos TT 20 Tv @ Electrical Characteristics (design reference values) (Vec=5V, Ta=25+2C) Parameter | symbot_[ Condition [ruin Typ [max] unit Error Amp. Gain/Band width product Poe PT = 0 = Tite Thermal Protection Circuit Thermal proetionoperaiontemperaue [Ty [| — | 0] — | Themal poesionsettemperre | Ta [| | is fe Logic Block Start count number [Nc [tnernat osc uses | — | 8 — [Cons Trapezoidal Wave Shaping Block , C=223 (U2,V2,W2) Oo Pom [sae [Poel Pe Note) The above values are design reference values, but not guaranteed ones.

1 Package Power Dissipation

Pp—Ta 1400 a ee eee eee ee a a ss id 1000} ree ssc | lotor

2 Lf piatse irs2m) |_|

i —_ Se 2 cof _—_| SN] es Se 8 gf | NI i a ee ry a a PR fa a Ambient Temperature Ta (1C) Panasonic 565 a

1 Pin Descriptions

PinNo[Pinname Function description Is3 Motor drive terminal ea [Po Paver rnd 9 [so sign gona

10 MI | Monitor ein

[ve Monitor terminal 2 12~14] U2,V2,w2 It has function for shaping the waveform. 15 _[Al__________| Ithas function for switching the waveform shaping process speed. 16 — 17 [PCL _____| Terminal for phase compensation of the current feedback system. 18,19 Circuit for integrating the deviation of the motor signal speed from the reference speed signal 20 The intemal reference voltage connected to the reverse input of the buffer amp. and the non-reverse input of the error amp. 21 ‘The intemal reference voltage determining the reference set voltage ofthe triangular wave of the oscillation block » | ss Low in the logic level for set-up mode, high in it for stand-by mode. The consumption current in the stand-by mode is approx. 10 A, typ. 23 It outputs the rectangular wave synchronized with the triangular wave. 4 Itcan set the oscillation frequency of triangular wave with the capacitor. 25 [COM _| Terminal inputting the neutral point of U, V and W. 26~30 Signal ground 31~33 Terminal detecting the inductive voltage coming from motor 34 [FG _—————_—_—_| It stably takes out the output of FG synchronized with the U-phase coil waveform. 35 Tt takes out the output for switching between start and detection mode. For logic level, “High” for start mode and “Low” for detection mode. 36 — 37 Synchronous operation allowed with extemal clock. The logic level can be commutat- ed at the rise edge of external clock. 38 Tt has function for rotating the motor normally or reversely. Energization to logic level : for normal rotation U-+V-+W-+U-+-+*, and for reverse rotation U--W—V— Us 39 Fe | Itis used to stop the motor. The lower side transistor of U, V and W is shorted. 0 Terminal sping esp las. 41[cs ___| Terminal detecting the current flowing in the motor. #2 | BIC ‘Terminal switching the extemal/intemal clock. When external clock is used, the logic level is “High.” When the internal clock is used, it operates at the falling edge from “High” to “Low”, and counts up with the count number fixed inside the IC. The start and detection modes are switched from each other automatically.

8 When the external clock is used, it allows the start/detection mode to be switched from

outside. For logic level, “High” for operation and “Low” for stop. 44 When the external clock is used, it switches the start/detection mode from outside. It realizes synchronous operation with external clock in the start mode and operates the detection loop in the detection mode. For logic level, “High” for start mode and “Low” for detection mode. mB 6932852 0022860 330 mm Panasonic 566

PinNo.| Symbol_[ Internal circuit Pin No] Symbol_| Internal circuit Same as for Pin® «|e | Same as for Pin 1 U ee spe | moe [ef | ef = 10 | vm ; Co) 6 ha}

12 Ww2

M@™@ 6932852 001286) 277 Panasonic 567

i Internal Circuits (cont.) PiaNo[ Symbol [_Intemalcireuit_ [Pin No.] "Symbol _| Internal circuit, [ocs] 20 a (21) COM i SL Hl S [eA] } . ee. - Refereace pal | Same as for Pin@)) 23 | oscl 24 | osc2 i ! : t

32852 OOR28b2 103 MM

—$—$ eee I Internal Circuits (cont.) Pin No] Symbol [Internal circuit Pin No Symbot_| Internal circuit, “P=

42 EIC

37 | CLK ) eb

8 SDI

L] IICs for] » @ lotor q 41 cs 932852 0022863 ONT MM 569

1 Block Diagram

(ees a GOOOOSOOSIO- a ipo : i ee Sees LOS Sh } ie ., Hs Nalale | Bl ee eae “ 1 BR Pee (= HS FOS oo ani © MH 6932852 0012864 To

570 Panasonic

1 External Parts Table

‘AN8221 (Sensor-less driver IC) External parts No, Recommended value Function A Rs | 0.560 ~0820 For current detection 0.0033 «F~0.012 uF For noise reject filter 0.1 p.F~ 10 nF For protection from power supply noise R; | sd 20k ~50K A For SDO detection [rar Rs | 20k ~50k, 02 For regulation of waveform shaping speed AN8235S_ (Speed control IC) SS OSCIAC joint (External Part Description) 1. Constant of integration (R1, R2, C1 and C2) Refer to the data sheet for speed control IC. 2. For phase compensation (C3) Itis a capacitor for phase compensation (low-pass filter) of the current feedback system. 3. For waveform shaping (C4, C5 and C6) ‘They have a certain relationship with pole number of three-phase motor as a constant setting function. ics for Ex) When the motor with 12 poles is used, Motor C : Capacitance of C4, C5 and C6 v:DC Qecv=ie~ voltage (200mV to 400mV) it Constant current (10 2A) t 1 The cycle of FG (Three-phase pole) X 1/6 The FG frequency under 3600 rpm of the three-phase 12 poles motor ! 3600rpm__ 12poles Fo= x “RS _ ws 7 = 360H2 r= —1— =278 = Spa 72-78ms = + x1=463 UXT 463 ps Q=it=10 pA X 463 psec 4.63 10° [q] Setting V=210mV (approx.) cu he L 4BX1" Looe “Vv 210x108 $$. @ 5932852 00be8bS 922 Mm Panasonic 571 OOOO

When three-phase 12 poles motor is used, the capacitance of C4, C5 and C6 is set to 0.022 PF. When 4, 6 or 8 poles motor is used, the constant should be reviewed according to the above values. 4. For current detection (R3) Resistor R3 has double function : detection resistor for the current flowing in the motor, as current feedback system } and current limiter. The voltage of current limiter is set to approx. 0.4V.. 16 max=0.4V/R3 [A] From the above calculation, the maximum current flowing in the motor can be set. 5. BEMF detection/noise rejection filter (R4, R5, R6, C7, C8 and C9) Iris a filter which rejects noise such as of inductive voltage generated from the motor. It is not required for the small noise motor. ‘When the filter constant is set too large, the optimum energization timing is missed, and the current value during constant rotation of motor is increased. Therefore, it should be set, taking into consideration the relationship with the motor. For our motor, the following filter is used ! R= 10k, C=0.012 F (approx.) 6. For power supply noise protection (C10) ‘When noise from the power supply makes the operation unstabilized, it should be attached. 7. For SDO detection (R7) . It outputs the start/detection loop switching output with the open collector, 8. For triangular wave oscillation (C11) It is a capacitor for triangular wave oscillation. ‘The oscillation frequency of triangular wave can be set as follows ? fosea= 2». cake) ee 8 CH VTED ° C11 ! External capacitor VTE2 : Reference voltage inside IC (approx. 2.5V) ICH : Reference current inside IC (approx. 3.3 1A) K ! Dispersion factor 9. For waveform shaping speed regulation (R8) With resistor R8, the constant current of the waveform shaping block in extemal clock mode can be regulated. 10. OSC/AC joint Refer to the data sheet for speed control IC (AN8235S) . MB 6932852 0012466 659 Panasonic 572 ee