ICs for Compact Disc/CD-ROM Player AN8746SA PWM driver IC for portable CD player ■ Overview Unit: mm +0.10 0.65 (0.625) 0.3 –0.05 Seating plane 0.65±0.10 0.65±0.10 • RON = 1.8 Ω (typ.) • Supply voltage range (Control block: 2.0 V to 3.6 V, power block: 1.2 V to 3.6 V) • Current at standby (Control block: 1 µA or less, power block: 1 µA or less) • With an output pin of monitoring 1/2 of the power supply voltage (0.5) 0.2+0.10 –0.05 16 ■ Features 1.5±0.2 1 6.1±0.3 17 0.1±0.1 32 8.1±0.3 11.0±0.3 The AN8746SA is a 4-channel actuator/motor drive IC by DMOS direct PWM method for a portable CD player. SSOP032-P-0300 ■ Applications • Portable CD player Logic circuit Predriver Predriver H bridge H bridge H bridge VM3 17 VGO 18 Fi3 VGI 19 20 VG limiter Predriver Predriver 16 VM2 15 N.C. GND 14 13 Fi2 12 Ri2 Ro2 11 10 PGND2 9 Fo2 Fo1 8 7 6 Logic circuit Ro1 5 Ri1 Fi1 4 3 MON 2 VC VM1 1 VM1 monitor Logic circuit H bridge PGND1 VBG Ri3 Logic circuit Reset TSD 21 Ro3 PGND3 22 23 Fo3 24 PGND4 Fo4 25 26 Ro4 27 Ri4 28 PC Fi4 29 30 AC 31 32 VM4 ■ Block Diagram 1 AN8746SA ICs for Compact Disc/CD-ROM Player ■ Pin Descriptions Pin No. Symbol 1 VM1 2 VC 3 MON 4 Description Pin No. Symbol Ch. 1 power supply 17 VM3 Ch.3 power supply Control circuit power supply 18 VGO Gate voltage clamp output VM1 monitor 19 VGI Gate voltage input pin Fil Ch. 1 forward direction input pin 20 Fi3 Ch. 3 forward direction input pin 5 Ril Ch. 1 reverse direction input pin 21 Ri3 Ch. 3 reverse direction input pin 6 Rol Ch. 1 reverse direction output pin 22 Ro3 Ch. 3 reverse direction output pin 7 PGND1 Ch. 1 power ground 23 PGND3 8 Fo1 Ch. 1 forward direction output pin 24 Fo3 Ch. 3 forward direction output pin 9 Fo2 Ch. 2 forward direction output pin 25 Fo4 Ch. 4 forward direction output pin 10 PGND2 Ch. 2 power ground 26 PGND4 11 Ro2 Ch. 2 reverse direction output pin 27 Ro4 Ch. 4 reverse direction output pin 12 Ri2 Ch. 2 reverse direction intput pin 28 Ri4 Ch. 4 reverse direction input pin 13 Fi2 Ch. 2 forward direction input pin 29 Fi4 Ch. 4 forward direction input pin 14 GND Control circuit ground 30 PC Power cut pin 15 N.C. 31 AC All cut-off pin 16 VM2 32 VM4 Ch. 4 power supply Ch. 2 power supply Description Ch. 3 power ground Ch. 4 power ground ■ Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Symbol Rating Unit VC 5 V VM 7 VGI 8.2 IDD 500 mA PD 400 mW Topr −30 to +75 °C Tstg −55 to +150 °C Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: Use within the range of PD = 390 mW or less at Ta = 75°C, following the allowable power dissipation characteristic curve of "■ Application Notes". ■ Recommended Operating Range Parameter Supply voltage Signal input voltage 2 Symbol Range Unit VC 2.0 to 2.4 to 3.6 V VM 1.2 to 2.4 to 3.6 VGI VM +3.5 to 7.0 to 8.0 VIN 0 to VC V ICs for Compact Disc/CD-ROM Player AN8746SA ■ Electrical Characteristics at VC = 2.4 V, VM12 = VM34 = 2.4 V, VGI = 7.0 V, AC = PC = 2.4 V, RL = 8 Ω, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Power supply current at mute (at PC = L or VC = L) *1 IMO PC = 0 V, AC = VC = 2.4 V or VC = PC = AC = 0 V 1 µA Control supply current at all cut (at AC = L or PC = L) ICO AC = L, PC = L 1 µA Control supply current at operating *2 IC AC = PC = VC = 2.4 V 0.5 1 mA Pre-driver supply current at all cut (at AC = L) *2 IGO AC = 0 V 1 µA Pre-driver supply current at operation (at VGI = 7 V) *2 IG AC = PC = VC = 2.4 V 0.5 1 mA PWM input voltage high-level VINH AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = H VC − 0.6 V PWM input voltage low-level VINL AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = L 0.6 V PWM input current high-level IINH AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = H 1 µA PWM input current low-level IINL AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = L −1 µA Driver on resistance (upper and lower) RON AC = PC = VC = 2.4 V 1.8 2.5 Ω Output propagation delay time at rising *2 tDr AC = PC = VC = 2.4 V 0.2 1 µs Output propagation delay time at falling *2 tDf AC = PC = VC = 2.4 V 0.2 1 µs Output propagation delay time difference tDr-tDf ∆tD AC = PC = VC = 2.4 V − 0.3 0.3 µs Minimum input pulse width *3 tmin AC = PC = VC = 2.4 V 0.3 µs VM monitor output voltage width VMON AC = PC = VC = 2.4 V 1.1 1.2 1.3 V VM monitor output gain GMON AC = PC = VC = 2.4 V 0.45 0.5 0.55 AC = PC = VC = 0 V −50 50 µA 1.7 1.9 2.1 V Power output pin flow-out/in current at low VC *1 VM monitor output voltage at VC limit IHZ LMON VM12 = VM34 = 5.0 V AC = PC = VC = 1.9 V Note) *1: AC pin and PC pin are connected to VC pin via a protective diode. AC pin and PC pin must be set to 0 V at VC = 0 V to avoid excessive flow-in current. 2: Measure at f = 44.1 kHz and in duty ratio = 50%. * 3: Measure at f = 44.1 kHz. Output pulse width must be ≥ tmin /2. * 3 AN8746SA ICs for Compact Disc/CD-ROM Player ■ Electrical Characteristics at VC = 2.4 V, VM12 = VM34 = 2.4 V, VGI = 7.0 V, AC = PC = 2.4 V, RL = 8 Ω, Ta = 25°C (continued) • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Min Typ Max Unit Thermal protection Thermal protection operating temperature TTHD 145 °C Thermal protection hysteresis width ∆TTHD 20 °C ■ Usage Notes 1. Care should be taken so as not to cause any of the following conditions on use of this IC. If the following conditions come up, the IC is likely to break down or to be smoking. Short-circuit between output pins Short-circuit between output pin and GND Short-circuit between output pin and power supply (Output pin refers to any of those Fo1 (pin 8), Ro1 (pin 6), Fo2 (pin 9), Ro2 (pin 11), Fo3 (pin 24), Ro3 (pin 22), Fo4 (pin 25), Ro4 (pin 27). GND refers to any of those GND (pin 14), PGND1 (pin 7), PGND2 (pin 10), PGND3 (pin 23), PGND4 (pin 26). Power supply refers to any of those VC (pin 2), VGI (pin 19), VM1 (pin 1), VM2 (pin16), VM3 (pin 17), VM4 (pin 32). 2. VM1 monitor pin (pin 3) outputs approximately one half of VM1 voltage and its upper limit is VC supply voltage. This is meant to prevent the DSP connected to this Pin from damage when the voltage exceeding an operating supply voltage range is inputted to the VM1 pin. On use of this pin, therefore, note that no value exceeding VC is outputted. ■ Application Notes 1. PD Ta curves of SSOP032-P-0300 PD T a 1.400 1.288 Power dissipation PD (W) 1.200 Mounted on standard board (glass epoxy: 50 mm × 50 mm × t0.8 mm) Rth(j-a) = 97.0°C/W 1.000 0.800 0.667 0.600 0.400 Independent IC without a heat sink Rth(j-a) = 187.2°C/W 0.200 0.000 0 25 50 75 100 Ambient temperature Ta (°C) 4 125 150 ICs for Compact Disc/CD-ROM Player AN8746SA ■ Application Notes 2. Logic table of driver VC PC Fil to Fi4 Ril to Ri4 Fol to Fo3 Rol to Ro3 Fo4 Ro4 H H L L L L L L H H L H L H L H H H H L H L L L H H H H L L H L H L X X L L L L L X X X Hi-Z Hi-Z Hi-Z Hi-Z Note) AC = H on the above logic table. H stands for VC power supply potential, L for GND potential (0 V) and X for H or L. Hi-Z indicates that the driver output pin becomes a high impedance state. Logic input pin must not be left open. And do not apply any other voltages than H or L. ■ Application Circuit Example VGI = 7 V DSP ⇔ Logic circuit H bridge H bridge 17 VM3 18 VGO 19 VGI 20 Fi3 VG limiter Predriver Predriver H bridge VM2 16 15 N.C. GND 14 Fi2 13 Ri2 12 Ro2 11 Logic circuit Fo2 9 Ro1 6 Ri1 5 Fi1 4 MON 3 VC 2 VM1 1 VM1 monitor Logic circuit H bridge Fo1 8 Predriver VBG PGND1 7 Predriver TSD Logic circuit PGND2 10 Reset 21 Ri3 22 Ro3 23 PGND3 24 Fo3 M 25 Fo4 27 Ro4 28 Ri4 29 Fi4 30 PC 31 AC 32 VM4 26 PGND4 M Microcomputer ⇔ DSP ⇔ VC = 2.4 V/0 V VM = 2.4 V 5