FAN8024ED 4-Channel Motor Driver Features Description • 2-Channel BTL driver with current feedback The FAN8024ED is a monolithic IC, suitable for 2-ch BTL DC motor drivers and 2-ch motor drivers with current feedback which drive the focus and tracking actuators of a CD media system. • 2-Channel BTL DC motor driver • Built-in thermal shutdown circuit • Built-in mute circuit 28-SSOPH-375 • Operating supply voltage: 4.5~13.2V Typical Applications • Compact disk ROM (CD-ROM) • Compact disk RW (CD-RW) • Digital video disk ROM (DVD-ROM) Ordering Information • Digital video disk RAM (DVD-RAM) • Digital video disk player (DVDP) Device Package • Other compact disk media Operating Temp. FAN8024ED 28-SSOPH-375 -25 °C ~ 85 °C FAN8024EDTF 28-SSOPH-375 -25 °C ~ 85 °C TF: Tape & Reel type ©2005 Fairchild Semiconductor Corporation FAN8024ED Rev. 1.0.0 1 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver September 2005 DO4+ 21 20 19 18 17 16 15 7.5K PVCC2 20K - + DO4− VCCGND 22 DO3+ IN3 23 DO3− CAP4.2 24 PGND2 CAP4.1 25 FB4 IN4 26 PVCC2 REF 27 10K STBY 28 GND 7.5K Loading Driver + - - + 15K 10K X2 Actuator Driver TSD PVCC1 PVCC2 VCC - 7.5K + + 20K 25K Actuator Driver 10K 7.5K 10K + - - + Sled Driver - X2 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1 GND 2 FAN8024ED Rev. 1.0.0 8 9 10 11 12 13 14 DO1+ 7 DO1− 6 DO2+ 5 DO2− 4 PGND1 3 PVCC1 2 VCC 1 IN1 VCC PVCC1 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Block Diagrams FAN8024ED 4-Channel Motor Driver Pin Assignments IN1 1 CAP1.1 28 STBY 27 REF 2 CAP1.2 3 26 IN4 IN2.1 4 25 CAP4.1 IN2.2 5 24 CAP4.2 OUT2 6 23 IN3 22 VCCGND FB1 7 FIN(GND) FAN8024ED 21 PVCC2 VCC 8 PVCC1 9 20 FB4 PGND1 10 19 PGND2 DO2− 11 18 DO3− DO2+ 12 17 DO3+ DO1− 13 16 DO4− DO1+ 14 15 DO4+ 3 FAN8024ED Rev. 1.0.0 FIN(GND) www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Pin Definitions Pine Number Pin Name I/O 1 IN1 I CH1 input Pin Function Description 2 CAP1.1 - 3 CAP1.2 - Connection with capacitor for CH1 4 IN2.1 I OP-AMP CH2 input(+) OP-AMP CH2 input(-) 5 IN2.2 I 6 OUT2 O OP-AMP CH2 output 7 FB1 I Feedback for CH1 8 VCC - Signal Vcc 9 PVCC1 - Power Supply 1 10 PGND1 - Power Ground 1 Drive2 Output (-) 11 DO2− O 12 DO2+ O Drive2 Output (+) 13 DO1− O Drive1 Output (-) 14 DO1+ O Drive1 Output (+) 15 DO4+ O Drive4 Output (+) 16 DO4− O Drive4 Output (-) 17 DO3+ O Drive3 Output (+) 18 DO3− O Drive3 Output (-) 19 PGND2 - Power Ground 2 20 FB4 - Feedback for CH4 21 PVCC2 - Power Supply 2 22 VCCGND - Vcc ground 23 IN3 I CH3 input 24 CAP4.2 - 25 CAP4.1 - Connection with capacitor for CH4 26 IN4 I CH4 input 27 REF I Bias voltage input 28 STBY I Stand-by input 4 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com ERROR AMP INPUT STAND-BY INPUT 70ΚΩ 2KΩ 2KΩ 30ΚΩ 4 5 2KΩ 28 1KΩ 1KΩ 40ΚΩ 2KΩ 30ΚΩ Figure 4. Stand-By Input Figure 1. Error Amp Input SIGNAL REFERENCE INPUT ERROR AMP OUTPUT 2ΚΩ 27 6 50ΚΩ Figure 2. Error Amp Output Figure 5. Signal Reference Input POWER AMP OUTPUT 11 12 13 14 15 16 17 18 Figure 3. Power Amp Output 5 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Equivalent Circuits Parameter Maximum supply voltage Power dissipation Operating temperature range Storage temperature range Symbol Value Unit VCCmax 15 V PD TOPR TSTG 1.7note W -25 ~ +85 °C -55 ~ +150 °C Note: 1. When mounted on a 50mm × 50mm × 1mm PCB (Phenolic Resin Material). 2. Power dissipation derating rate: -13.6mW/°C (Ta≥25°C). 3. Must not exceed Pd (Power dissipation) and SOA (Safe operating area). Power Dissipation Curve Pd [mW] 3,000 2,000 1,000 SOA 0 0 25 50 75 85 100 125 150 175 Ambient Temperature, Ta [°C] Recommended Operating Conditions (Ta = 25°C) Symbol Min. Typ. Max. Unit Supply Voltage Parameter VCC 4.5 - 13.2 V Supply Voltage PVCC1,PVCC2 - VCC - V 6 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Absolute Maximum Ratings (Ta = 25°C) (Unless otherwise specified, Ta = 25 °C, VCC = 12V, PVCC1,2 = 5V) Parameter Symbol Conditions Min. Typ. Max. Unit Quiescent Current1 ICC1 Stand-by off - 18 27 mA Quiescent Current2 ICC2 Stand-by on - - 0.5 mA Stand-by On Voltage VSTon - - - 0.5 V Stand-by Off Voltage VSToff - 2.0 - - V Output Offset Current IOO1,4 - -6 0 +6 mA Maximum Output Voltage1 VOM1,4 - 3.6 4.0 - V Transconductance GM1,4 1.5 1.7 1.9 A/V 11.0 V ACTUATOR DRIVE CIRCUIT VIN = 100mVp-p, f=1kHz PRE OP AMP (SLED DRIVER) Common mode Input Range* VOOM - 0 - IB - -300 -30 - nA Low Level Output Voltage VOL - - 0.1 0.3 V High Level Output Voltage VOH - 10 10.9 - V ISOURCE - 1 4 - mA ISINK - 5 10 - mA Output Offset voltage2 VOF2 - -100 0 +100 mV Maximum Output Voltage2 VOM2 - 10.0 10.9 - V Closed loop Voltage Gain2 GVLO2 18.0 20.0 22.0 dB Input Bias Current Output Source Current Output Sink Current SLED DRIVE CIRCUIT VIN = 100mVp-p, f=1kHz Loading DRIVE CIRCUIT Output Offset Voltage3 VOF3 - -50 0 50 mV Maximum Output Voltage 3 VOM3 - 3.6 4.0 - V Closed loop Voltage Gain 3 GVLO3 13.5 15.5 17.5 dB VIN = 100mVp-p, f=1kHz *: Guaranteed design value 7 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Electrical Characteristics FAN8024ED 4-Channel Motor Driver Application Information 1. Reference Input & and Stand-by Function • Reference input (PIN 27) The applied voltage at the reference input pin must be between 0.8V and 6.5V, when VCC=8.5V. • Stand-by input (PIN 28) The following input conditions must be satisfied for the stand-by function. Stand-by input voltage OPERATION Below 0.5V or open The stand-by function is activated so the bias block and power block are disabled Above 2.0V Recover the normal operation 2. Protection Function Thermal shutdown (TSD) If the chip temperature rises above 175°C, the thermal shutdown (TSD) circuit is activated and the output circuit enters the mute state, which is off state. The TSD circuit has a temperature hysteresis of 25°C. 3. Separation of Power Supply • PVCC1 (PIN 9) PVCC1 is the power supply for the loading driver. The range is between 5V~12V. • PVCC2 (PIN 21) PVCC2 is the power supply for the actuator drivers that include focus and tracking actuators. The range is between 5V~12V • VCC (PIN 8) VCC pin supplies power for the sled driver and the signal logic part. VCC≥PVCC1(PVCC2). 4. Current feedback channels (channel 1 & and 4) 20k poweramp current feedb ack amp actuator 10k Level shift Command 7.5k ref Sensing resistor 7.5k X2 Rext Cext • The reference voltage(ref) is supplied externally through pin 27. • The input OP-amp output signal is amplified by (20K/10K) times and then fed to the current feedback amplifier. • The current feedback amplifier compares the output current sensed input and command input and then makes the controlled output to eliminate delay effect of the load. Please refer to the Application Note 4109 for additional information about current feedback theory (http://www.fairchildsemi.com/an/AN/AN-4109.pdf). • The DC gain of current feedback amplifier and power amplifier is unity, which is 1 [A/V]. Users can change the gain by adding external resistor at the command input. 8 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver 5. Channel 2 Schematic poweramp 25k Level shift 10k M ref • The reference voltage(ref) is given externally through pin 27. • The input OP-amp can be used for several purposes, for example low pass filter, differential input coordinator, gain scaler and so on. 6. Channel 3 Schematic poweramp 15k Level shift 10k Command M ref • The reference voltage(ref) is given externally through pin 27. • The input OP-amp output signal is amplified by (15K/10K) times and then fed to the power amplifier. The gain of power amplifier is 4; therefore, the total max gain of channel 3 is 6. • Users must check input command range to use max output voltage because the total gain is relatively smaller than other channels. 9 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Typical Application Circuits SERVO FOCUS AMP TRACKING SLED REF 1 IN1 STBY 28 2 CAP1.1 REF 27 3 CAP1.2 IN4 26 4 IN2.1 CAP4.1 25 5 IN2.2 CAP4.2 24 6 OUT2 IN3 23 7 FB1 Stand by REF TRAY CONTROL IN VCCGND 22 FAN8024ED 8 VCC PVCC2 21 5V or 12V 12V 9 PVCC1 FB4 20 5V or 12V 10 PGND PGND 19 11 DO2− DO3− 18 TRAY MOTOR SLED MOTOR FOCUS ACTUATOR RD 12 DO2+ DO3+ 17 13 DO1− DO4− 16 RD 14 DO1+ 10 FAN8024ED Rev. 1.0.0 TRACKING ACTUATOR DO4+ 15 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver Package Dimensions 11 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com FAN8024ED 4-Channel Motor Driver 12 FAN8024ED Rev. 1.0.0 www.fairchildsemi.com