WAFER WIN W49 3-Phase Motor Driver for CD-ROMs The W49 series are ICs developed for CD-ROM spindle motor drives. These ICs possess a short brake and reverserotation brake for two types of brake functions, and also contain FG output and rotation direction detection (FR) circuits, making them high-functionality and high-performance ICs. Applications CD-ROM, CD-R, CD-RW, DVD-ROM, and DVD-RAM Features 1) Three-phase, full-wave, pseudo-linear drive system. 2) Built-in power save and thermal shutdown functions. 3) Built-in current limiter and Hall bias circuits. 4) Built-in FG output. 5) Built-in rotation direction detector. 6) Built-in reverse rotation prevention circuit. 7) Built-in short brake pin. Absolute maximum ratings (Ta = 25C) Parameter Symbol Limits Unit Vcc 7 V VM1 13.5 V VM2 13.5 V Pd 1700*2 mW Operating temperature Topr -20~+75 ℃ Storage temperature Tstg -55~+150*5 ℃ Output current Iout 1100 mA Applied Voltage (with 5V power supply) Applied Voltage (motor power supply1) Applied Voltage (motor power supply2) Power W49 dissipation ＊ 1 Reduced by 17.6mW for each increase in Ta of 1℃ over 25℃. ＊ 2 When mounted on a 70mmX70mmX1.6mm glass epoxy board. Reduced by 13.6mW for each increase in Ta of 1℃ over 25℃. ＊ 3 Reduced by 11.6mW for each increase in Ta of 1℃ over 25℃. ＊ 4 Reduced by 8.0mW for each increase in Ta of 1℃ over 25℃. ＊ 5 Tj should not exceed 150℃. ＊ 6 Should not exceed Pd or ASO values. * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 1 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol Limits Unit Vcc 4.25~5.5 V VM1 13.5 V VM2 13.5 V Block diagram W49 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 2 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs Pin descriptions W49 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 3 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs Input / output circuits (1) Power save (3) Torque output (A1, A2, and A3) (4) Hall input (H1, H1–, H2, H2–, H3, H3–) (2) Torque command input * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 4 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs (5) Hall bias (7) FR Output (6) FG output (8) Short brake Note: Resistance values are typical values. * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 5 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 5V, VM1 = 12V, VM2 = 12V) * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 6 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs Circuit operation (1) Hall input to coil output The phase relationship between the Hall input signals and the output current and voltage is shown in Fig.9. The motor position data input via the Hall pins is amplified by the Hall amplifier, and formed into waveforms by the matrix block.These signals are input to the output driver that supplies the drive current to the motor coils. * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 7 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs (2) Torque command The RNF pin voltage with respect to the torque command (EC) is as follows: The I / O gain (GEC) from the EC pin to the RNF pin (output current) is determined by the RNF detector resistor. GEC = 0.255 / RNF [A / V] The torque limit current ITL is given by: ITL = 0.35 / RNF [A] (3) Reverse rotation detection function The reverse detection circuit construction is shown in Fig.11. (1) Forward (EC < ECR) The phase relationship between the Hall input signals H2 and H3 becomes as shown in Fig.9, and the reverse rotation detection circuit does not operate. (2) Reverse (EC > ECR) The phase relationship between the signals H2 and H3 is opposite that for forward operation, and the reverse rotation detection circuit operates. The output goes OFF, and becomes open circuit. * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 8 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs (4) Short brake When 3.5V or more is applied to the short brake pin, the upper-side output transistors of all go off, and the lowerside output transistors go on. Short braking operates regardless of the torque command signal. (5) Other circuits When 3.5V or more is applied to the power save pin, all circuits are on. When 1.5V or less is applied, the IC enters power save mode. Also, the Hall bias pins turn on and off with the power save pin. Application example * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 9 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs Operation notes (1) Power save The power save input is an I / O circuit like the own shown in Fig.1. The thermal derating characteristics of the power save pin is –8mV / C, and the resistance will fluctuate between ±30% so be careful of the input voltage range. (2) Hall input The input circuit shown in Fig.4 is used for the Hall inputs. The Hall elements can be connected either in series or in parallel. (3) Thermal shutdown (TSD) When the junction temperature reaches 175C, the A1, A2, and A3 coil outputs go open circuit. The thermal shutdown has approximately 15C of hysteresis. Electrical characteristics curves * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 10 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052 WAFER WIN W49 3-Phase Motor Driver for CD-ROMs External dimensions (Units: mm) HSOP-28 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: [email protected] Tel:886-3-3214525 Http: www.ceramate.com.tw Page 11 of 11 Rev 1.1 May.9, 2002 Fax:886-3-3521052