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| www.fairchildsemi.com FAN8024BD 4-Channel Motor Driver 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. 28-SSOPH-375 Features * * * * * 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 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 FAN8024BD Package 28-SSOPH-375 Operating Temp. -25 C ~ 85 C -25 C ~ 85 C FAN8024BDTF 28-SSOPH-375 Rev. 1.0.0 (c)2001 Fairchild Semiconductor Corporation 2 28 1 2 3 4 5 6 7 8 9 10 PGND1 DO2- DO2+ DO1- DO1+ 11 12 13 14 PVCC1 27 26 25 24 23 22 IN1 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1 STBY REF IN4 CAP4.1 CAP4.2 IN3 VCCGND FAN8024BD Pin Assignments (GND) FIN FAN8024BD FIN (GND) VCC 21 20 19 18 17 16 15 PVCC2 FB4 PGND2 DO3- DO3+ DO4- DO4+ FAN8024BD Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name IN1 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1 VCC PVCC1 PGND1 DO2- DO2+ DO1- DO1+ DO4+ DO4- DO3+ DO3- PGND2 FB4 PVCC2 VCCGND IN3 CAP4.2 CAP4.1 IN4 REF STBY I/O I I I O I O O O O O O O O I I I I CH1 input Connection with capacitor for CH1 OP-AMP CH2 input(+) OP-AMP CH2 input(-) OP-AMP CH2 output Feedback for CH1 Signal Vcc Power Supply 1 Power Ground 1 Drive2 Output (-) Drive2 Output (+) Drive1 Output (-) Drive2 Output (+) Drive4 Output (+) Drive4 Output (-) Drive3 Output (+) Drive3 Output (-) Power Ground 2 Feedback for CH4 Power Supply 2 Vcc ground CH3 input Connection with capacitor for CH4 CH4 input Bias voltage input Stand-by input Pin Function Description 3 FAN8024BD Internal Block Diagram VCCGND CAP4.1 CAP4.2 PGND2 PVCC2 DO3- DO4- DO3+ 28 27 26 25 24 23 22 21 20 FB4 IN4 IN3 GND 19 18 17 16 15 10K 20K + TSD + 20K 10K 7.5K 1 IN1 2 CAP1.1 3 CAP1.2 4 IN2.1 DO1- DO2- GND 4 PVCC1 PGND1 OUT2 DO2+ IN2.2 DO1+ FB1 VCC - - + 10K + 5 - - + - - + 7.5K PVCC2 7.5K X2 10K 15K Loading Driver PVCC1 PVCC2 VCC Actuator Driver 7.5K X2 25K Sled Driver Actuator Driver VCC PVCC1 6 7 8 9 10 11 12 13 14 DO4+ STBY REF - + FAN8024BD Equivalent Circuits ERROR AMP INPUT STAND-BY INPUT 3K 4 1K 2K 3K 5 1K 2K 28 50 ERROR AMP OUTPUT SIGNAL REFERENCE INPUT 50 6 27 50 POWER AMP OUTPUT 11 12 13 14 16 17 18 5 FAN8024BD Absolute Maximum Ratings (Ta = 25C) Parameter Maximum supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VCCmax PD TOPR TSTG Value 15 1.7note -25 ~ +85 -55 ~ +150 Unit V W C C NOTE: 1. When mounted on a 50mm x 50mm x 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 13.6mW/C for using above Ta = 25C 3. Do not exceed PD and SOA(Safe operating area). Power Dissipation Curve Pd [mW] 3,000 2,000 1,000 0 0 SOA 25 50 75 85 100 125 150 175 Ambient Temperature, Ta [C] Recommended Operating Conditions (Ta = 25C) Parameter Supply Voltage Symbol VCC Min. 4.5 Typ. Max. 13.2 Unit V 6 FAN8024BD Electrical Characteristics (Unless otherwise specified, Ta = 25 C, VCC = 12V, PVCC1,2 = 5V & the other conditions & nomenclatures follow the test circuit) Parameter Quiescent Current1 Quiescent Current1 Stand-by On Voltage Stand-by Off Voltage ACTUATOR DRIVE CIRCUIT Output Offset Current Maximum Output Voltage1 Transconductance PRE OP-AMP (SLED DRIVER) - ) Common mode Input Range Input Bias Current Low Level Output Voltage Output Source Current Output Sink Current SLED DRIVE CIRCUIT Output Offset Maximum Output Voltage2 Closed loop Voltage Gain1 Loading DRIVE CIRCUIT Output Offset Voltage1 Maximum Output Voltage 3 Closed loop Voltage Gain 2 VOF3 VOM3 GVLO3 VIN = 100mVp-p, f=1KHz -50 3.6 13.5 0 4.0 15.5 50 17.5 mV V dB VOF2 VOM2 GVLO2 VIN = 100mVp-p, f=1kHz -100 10.0 18.0 0 10.9 20.0 +100 22.0 mV V dB VOOM IB VOL ISOURCE ISINK 0 -300 1 5 -30 0.1 4 10 11.0 0.3 V nA V mA mA IOO1,4 VOM1,4 GM1,4 VIN = 100mVp-p, f=1kHz -6 3.6 1.5 0 4.0 1.7 +6 1.9 mA V A/V Symbol ICC1 ICC2 VSTon VSToff Conditions Stand-by off Stand-by on Min. 2.0 Typ. 18 Max. 27 0.5 0.5 Unit mA mA V V 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 Stand-by input voltage Below 0.5V or OPEN Above 2.0V Stand-by function is activated so the bias block and the power block are disabled Normal operation 2. Protection Function Thermal shutdown (TSD) If the chip temperature rises above 175C, 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 25C 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 1 SERVO FOCUS AMP TRACKING SLED 2 IN1 CAP1.1 CAP1.2 STBY 28 REF 27 IN4 26 CAP4.1 25 CAP4.2 24 IN3 23 Stand by REF 3 REF 4 IN2.1 5 IN2.2 OUT2 6 TRAY CONTROL IN 7 FB1 VCCGND 22 FAN8024BD 8 12V 9 5V or 12V 10 PGND 11 DO2- SLED MOTOR 12 DO2+ DO3+ 17 PGND 19 DO3- 18 TRAY MOTOR PVCC1 FB4 20 VCC PVCC2 21 5V or 12V FOCUS ACTUATOR RD 13 DO1- 14 DO1+ DO4- 16 RD DO4+ 15 TRACKING ACTUATOR 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. www.fairchildsemi.com 7/13/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 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. |
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