HA13557AFH Datasheet | Hitachi Semiconductor

Description This BO Driver for HDD application consists of Sensorless Spindle Driver and BTL type VCM Driver. Bipolar Process is applied and a “Soft Switching Circuit” for less mutation noise and a “Booster Circuit” for smaller Saturation Voltage of Output Transistor are also implemented. Features - - - - Soft Switching Driver Small Surface Mount Package: FP-48T (QFP48 Pin) Low thermal resistance: 30°C/W with 4 layer multi glass-epoxy board Low output saturation voltage  Spindle 1.44 V Typ (@1.8 A)  VCM 1.0 V Typ (@1.0 A) Functions - - - - - - - - - - 2.2 A Max/3-phase motor driver 1.5 A Max BTL VCM Driver Auto retract Soft Switching Matrix Start up circuit Booster Speed Discriminator Internal Protector (OTSD, LVI) POR Power monitor Pin Arrangement RS RETON RETPOW Vpsv LVI2 GND GND OPIN(- ) VCTL OPIN(+) RESINH VREF1 42 41 40 39 38 37 36 POUT 35 NC- 34 NC- 33 GAIN 32 VCMENAB 31 GND 48 47 46 45 44 43 VBST VCMP VCMN BC2 BC1 GND 1 2 3 4 5 6 GND W RNF PP CT V 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 30 GND 29 POR 28 SPNENAB 27 READY 26 CLOCK 25 CNTSEL U C-PUMP CLREF R1 Vpss GND - NC : No internal connection Please note that there is no isolation check between pin 34 and pin 35 at the testing of this IC. (Top View) GND VSS LVI1 DELAY M POLSEL Pin Description Pin Number Pin Name 1 2 3 4 5 6, TAB, 7 8 9 10 11 12 13 14 15 16 17 18, TAB, 19 20 21 22 23 24 25 26 27 28 29 30, TAB, 31 32 33 VBST VCMP VCMN BC2 BC1 GND W RNF PP CT V U C-PUMP CLREF R1 Vpss GND VSS LVI1 DELAY M POLSEL CNTSEL CLOCK READY SPNENAB POR GND VCMENAB GAIN Function Boosted voltage output to realize the low output saturation voltage Output terminal on VCM driver Output terminal on VCM driver To be attached the external capacitor for booster circuitry ditto Ground pins W phase output terminal on spindle motor driver Sensing input for output current on spindle motor driver To be attached the external capacitor for phase pensation of spindle...