www.fairchildsemi.com FAN8024BD 4-Channel Motor Driver Features Description • • • • • The FAN8024BD is a monolithic IC, suitable for a 2-ch BTL DC motor driver and a 2-ch motor driver with current feedback which drives the focus and tracking actuator of a CD- media system. 2-Channel BTL driver with current feedback 2-Channel BTL DC motor driver Built-in thermal shutdown circuit Built-in mute circuit Operating supply voltage: 4.5~13.2V 28-SSOPH-375 Typical Applications • • • • • • Compact disk ROM (CD-ROM) Compact disk RW (CD-RW) Digital video disk ROM (DVD-ROM) Digital video disk RAM (DVD-RAM) Digital video disk player (DVDP) Other compact disk media Ordering Information Device Package Operating Temp. FAN8024BD 28-SSOPH-375 -25 °C ~ 85 °C FAN8024BDTF 28-SSOPH-375 -25 °C ~ 85 °C Rev. 1.0.0 ©2001 Fairchild Semiconductor Corporation 2 1 2 3 4 5 6 7 IN1 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1 STBY REF IN4 CAP4.1 CAP4.2 IN3 VCCGND 28 27 26 25 24 23 22 FB4 PGND2 DO3− DO3+ DO4− DO4+ 20 19 18 17 16 15 8 9 10 11 12 13 14 PGND1 DO2− DO2+ DO1− DO1+ FIN (GND) 21 PVCC1 FAN8024BD PVCC2 (GND) FIN VCC FAN8024BD Pin Assignments FAN8024BD Pin Definitions Pin Number Pin Name I/O Pin Function Description 1 IN1 I CH1 input 2 CAP1.1 - Connection with capacitor 3 CAP1.2 - for CH1 4 IN2.1 I OP-AMP CH2 input(+) 5 IN2.2 I OP-AMP CH2 input(-) 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 11 DO2− O Drive2 Output (-) 12 DO2+ O Drive2 Output (+) 13 DO1− O Drive1 Output (-) 14 DO1+ O Drive2 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 - Connection with capacitor 25 CAP4.1 - for CH4 26 IN4 I CH4 input 27 REF I Bias voltage input 28 STBY I Stand-by input 3 FAN8024BD 21 20 19 18 17 16 15 7.5K PVCC2 20K - + DO4+ 22 DO4− VCCGND 23 DO3+ IN3 24 DO3− CAP4.2 25 PGND2 CAP4.1 26 FB4 IN4 27 GND PVCC2 REF 28 10K STBY Internal Block Diagram 7.5K Actuator Driver Loading Driver + - - + 15K 10K X2 TSD PVCC1 PVCC2 VCC - + + 7.5K 20K 25K Actuator Driver 10K 7.5K 10K + - - + Sled Driver - X2 4 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1 GND 8 9 10 11 12 13 14 DO1+ 7 DO1− 6 DO2+ 5 DO2− 4 PGND1 3 PVCC1 2 VCC 1 IN1 VCC PVCC1 FAN8024BD Equivalent Circuits ERROR AMP INPUT 3KΩ STAND-BY INPUT 3KΩ 4 5 1KΩ 2KΩ 1KΩ 28 50Ω 2KΩ ERROR AMP OUTPUT SIGNAL REFERENCE INPUT 50Ω 6 27 50ΚΩ POWER AMP OUTPUT 11 12 13 14 16 17 18 5 FAN8024BD Absolute Maximum Ratings (Ta = 25°°C) Parameter Symbol Value Unit Maximum supply voltage VCCmax 15 V PD 1.7note W Operating temperature range TOPR -25 ~ +85 °C Storage temperature range TSTG -55 ~ +150 °C Power dissipation NOTE: 1. When mounted on a 50mm × 50mm × 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 13.6mW/°C for using above Ta = 25°C 3. Do not exceed PD 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) Parameter Supply Voltage 6 Symbol Min. Typ. Max. Unit VCC 4.5 - 13.2 V FAN8024BD Electrical Characteristics (Unless otherwise specified, Ta = 25 °C, VCC = 12V, PVCC1,2 = 5V & the other conditions & nomenclatures follow the test circuit) Parameter Symbol Conditions Min. Typ. Max. Unit Quiescent Current1 ICC1 Stand-by off - 18 27 mA Quiescent Current1 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 ACTUATOR DRIVE CIRCUIT VIN = 100mVp-p, f=1kHz −AMP (SLED DRIVER)) PRE OP− VOOM - 0 - 11.0 V IB - -300 -30 - nA VOL - - 0.1 0.3 V ISOURCE - 1 4 - mA ISINK - 5 10 - mA Output Offset VOF2 - -100 0 +100 mV Maximum Output Voltage2 VOM2 - 10.0 10.9 - V Closed loop Voltage Gain1 GVLO2 18.0 20.0 22.0 dB Common mode Input Range Input Bias Current Low Level Output Voltage Output Source Current Output Sink Current SLED DRIVE CIRCUIT VIN = 100mVp-p, f=1kHz Loading DRIVE CIRCUIT Output Offset Voltage1 VOF3 - -50 0 50 mV Maximum Output Voltage 3 VOM3 - 3.6 4.0 - V Closed loop Voltage Gain 2 GVLO3 13.5 15.5 17.5 dB VIN = 100mVp-p, f=1KHz 7 FAN8024BD Application Information 1. Reference Input & 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 normal stand-by function. Stand-by input voltage Below 0.5V or OPEN Stand-by function is activated so the bias block and the power block are disabled Stand-by input voltage Above 2.0V 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 is in the mute state, that 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 for loading driver. The range is between 5V ~ 12V. • PVCC2 (PIN 21) PVCC2 is the power supply for actuator driver that include focus and tracking actuator. The range is between 5V ~ 12V • VCC (PIN 8) VCC pin supplies power for sled driver and signal logic part. The voltage applied to VCC must be higher than PVcc1 and PVCC2 at least 1V 8 FAN8024BD 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 FAN8024BD 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+ TRACKING ACTUATOR DO4+ 15 9 FAN8024BD DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 7/13/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation