www.fairchildsemi.com FAN8025G3 5-Channel Motor Driver Features Description • • • • • • The FAN8025G3 is a monolithic IC, suitable for 2-ch BTL DC motor drivers, 2-ch motor drivers with current feedback which drive the focus and the tracking actuator and 1-ch logic input loading driver. 2-Channel BTL drivers with current feedback 2-Channel BTL DC motor drivers 1-Channel Logic input loading driver Built-in thermal shutdown circuit Built-in mute circuit Operating supply voltage: 4.5~13.2V Typical Applications • • • • Compact disk ROM (CD-ROM) Digital video disk player (DVDP) Video compact disk player(VCDP) Other compact disk media 28-SSOPH-375SG2 Ordering Information Device Package Operating Temp. FAN8025G3 28-SSOPH375SG2 -35 °C ~ 85 °C FAN8025G3X 28-SSOPH375SG2 -35 °C ~ 85 °C X:Tape & Reel type Rev. 1.0.0 ©2003 Fairchild Semiconductor Corporation 2 1 2 3 4 5 6 7 IN5 CAP5.1 CAP5.2 FB5 FB4 CAP4.1 CAP4.2 DO5− DO5+ DO4− DO4+ VCC2 MUTE REF 28 27 26 25 24 23 22 IN3 VCC1 DO3+ DO3− DO2+ DO2− 20 19 18 17 16 15 8 9 10 11 12 13 14 CTL FWD REV DO1+ DO1− FIN (GND) 21 IN4 FAN8025G3 IN2 (GND) FIN SGND FAN8025G3 Pin Assignments FAN8025G3 Pin Definitions Pin Number Pin Name I/O Pin Function Description 1 IN5 A CH5 input 2 CAP5.1 A Connection with capacitor 3 CAP5.2 A for CH5 4 FB5 A Feedback for CH5 5 FB4 A Feedback for CH4 6 CAP4.1 A Connection with capacitor 7 CAP4.2 A for CH4 8 SGND P Signal ground 9 IN4 A CH4 input 10 CTL A CH1 speed control input 11 FWD I CH1 forward input 12 REV I CH1 reverse input 13 DO1+ O Drive1 Output (+) 14 DO1− O Drive1 Output (−) 15 DO2− O Drive2 Output (−) 16 DO2+ O Drive2 Output (+) 17 DO3− O Drive3 Output (−) 18 DO3+ O Drive3 Output (+) 19 VCC1 P Power for channel 1,2 and 3 20 IN3 A CH3 input 21 IN2 A CH2 input 22 REF A Bias voltage input 23 MUTE I CH2,3,4 and 5 mute signal input 24 VCC2 P Power for channel 4and 5 25 DO4+ O Drive4 Output (+) 26 DO4− O Drive4 Output (−) 27 DO5+ O Drive5 Output (+) 28 DO5− O Drive5 Output (−) 3 FAN8025G3 Internal Block Diagram VCC1 20k 10k IN4 VCC1 VCC1 9 Level shift 7.5k 7.5k 24 VCC2 25 DO4+ 26 DO4- 5 FB4 27 DO5+ 28 DO5- 4 FB5 CAP4.1 6 CAP4.2 7 X2 VCC1 VCC1 VCC1 20k 10k IN5 1 Level shift 7.5k 7.5k CAP5.1 2 CAP5.2 3 X2 8 IN3 20 FIN FIN SGND TSD VCC1 20k Level shift 10k 19 VCC1 18 DO3+ 17 DO3- 16 DO2+ 15 DO2- 13 DO1+ 14 DO2- VCC1 21 11 REV 12 MUTE 23 REF 4 22 Level shift FWD Speed control 10 Logic CTL 20k 10k Level shift IN2 FAN8025G3 Equivalent Circuits CH2/3/4/5 Inputs Current Feedback Amp Outputs VCC1 VCC1 VCC1 VCC1 1 1K 1K 50 Ref 10K 7 9 3 20 10K 50 10K 21 Current Feedback Amp Compensation Inputs VCC1 VCC1 7.5K 2 6 7.5K Current Feedback Inputs VCC1 10K VCC1 10K 4 20K 5 Drive output - 20K 5 FAN8025G3 Equivalent Circuits(continued) CH1 Inputs(FWD/REV) CH1 Control Input(CTL) VCC1 VCC1 VCC1 30K 11 40K 10K 12 10 30K 35K Mute Input VCC1 Ref Input VCC1 100K 1K 40K 23 1K 1K 1K 22 40K CH1/2/3 Drive Outputs CH4/5 Drive Outputs VCC1 VCC2 VCC1 13 30K 14 30K 26 15 27 16 28 17 18 20K 6 25 20K 1K FAN8025G3 Absolute Maximum Ratings (Ta = 25°C) Parameter Symbol Value Unit Maximum supply voltage VCC1,2max 15 V Power dissipation note PD 2.5 W Operating temperature range TOPR -35 ~ +85 °C Storage temperature range TSTG -55 ~ +150 °C NOTE: 1. When mounted on a 50mm × 50mm × 1mm PCB (Phenolic resin material). 2. This is experimental data. 3. Power dissipation decrease rate : -20mW/°C(Ta≥25°C). 4. Should not exceed P D and SOA (Safe Operating Area). Power Dissipation Curve Pd [mW] 3,000 2,000 SOA 1,000 0 0 25 50 75 85 100 125 150 175 Ambient Temperature, Ta [°C] Recommended Operating Conditions (Ta = 25°C) Parameter Supply Voltage Symbol Min. Typ. Max. Unit VCC1,2 4.5 - 13.2 V 7 FAN8025G3 Electrical Characteristics (Unless otherwise specified, Ta = 25 °C, VCC1 = 12V, VCC2 = 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 - 9 - mA Mute On Voltage VMON - - - 0.5 V Mute Off Voltage VMOFF - 2.0 - - V REF input voltage range VREFIN - 1.0 - 3.3 V REF input current range* IREFIN -10 - 10 uA VREF=1.65V ACTUATOR DRIVER(CH4,CH5) Output Offset Current45 IOO45 - -6 0 +6 mA Maximum Output Voltage45 VOM45 - 3.6 4.0 - V Transconductance GM45 1.2 1.4 1.6 A/V Control voltage input range45* VIN45 - 0 - 5 V VIN = 100mVp-p, f=1kHz SLED/SPINDLE DRIVER(CH2,CH3) Output Offset Voltage23 VOF23 - -100 0 +100 mV Maximum Output Voltage23 VOM23 - 9.5 10.0 - V Closed loop Voltage Gain23 GVLO23 16 18.0 20 dB Control voltage input range23* VIN = 100mVp-p, f=1kHz VIN23 - 0 - 5 V Input high level Voltage VIH - 2 - - V Input low level Voltage VIL - - - 0.5 V Output Offset Voltage1 VOF1 - -50 0 50 mV GV - 1.0 1.2 1.4 V/V LOADING DRIVER(CH1) Transfer Gain * : Guaranteed design values 8 FAN8025G3 Application Information 1. Reference Input • Reference input (PIN 22) The applied voltage at the reference input pin must be ranged between 1.0V and 3.3V, when V CC1=12V. When the reference input voltage goes below 0.7V, all channels are disabled. 2. Stand-by Function • MUTE input (PIN 23) We recommend CH1 as the loading(or tray) motor driver. Detailed logic table is as below. INPUT LOGIC Stand-by input CH1 CH2 CH3 CH4 CH5 High O O O O O Low or open O X X X X 3. Protection Function Thermal shutdown (TSD) When 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 4. Separation Of Power Supply • VCC2 (PIN 24) VCC2 is the power supply for CH4 and CH5, which are current feedback drivers. • VCC1 (PIN 19) VCC1 is the power supply for CH1, CH2, CH3 and predriver. VCC1 input voltage must be higher than or same to VCC2. (VCC1 ≥VCC2) 9 FAN8025G3 4. Current feedback channels(channel 4 & 5) actuator 10k Level shift Command power amp current amp 20k 7.5k ref Sensing resistor 7.5k X2 Rext Cext • The reference voltage(ref) is given externally through pin 22. • 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 then makes the controlled output to eliminate delay effect of the load. Please refer to the application note for more 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, that is 1 [A/V]. Users can change the gain by adding external resistor at the command input. 5. Channel 2 & 3 schematic power amp 20k 10k Level shift Command M ref • The reference voltage(ref) is given externally through pin 22. • The input OP-amp output signal is amplified by (12K/10K) times and then fed to the power amplifier. The gain of power amplifier is 4 so the total max gain of channel 2 and 3 is 8. 10 FAN8025G3 6. Channel 1 schematic CTL 10 FWD 11 REV 12 DO1+ Vpref Level shift Speed control Logic 13 DO1- M 14 Vpref • The inputs of channel 1 are FWD, REV which are logic inputs and CTL which is linear input. The CTL input is used to control the output gain, meanwhile FWD and REV are logic inputs to select output driver’s direction. • Below table is FWD and REV logic input table. Input Output FWD REV DO1+ DO1- condition H H Vpref Vpref Brake H L H L Forward L H L H Reverse L L Vpref Vpref Brake 11 FAN8025G3 Typical Application Circuits SPINDLE SPIN COMMAND DO5− 28 IN1 1 SERVO FOCUS IC 2 CAP5.1 DO5+ 27 3 CAP5.2 DO4− 26 FOCUS ACTUATOR RCS TRACKING ACTUATOR RCS SLED SLED COMMAND 4 FB5 DO4+ 25 5 FB4 VCC2 24 TRACKING 5V 6 CAP4.1 MUTE 23 MUTE LOADING 7 CAP4.2 PGND REF FAN8025G3 22 REF PGND SPIN COMMAND 8 SGND IN2 21 9 IN4 IN3 20 10 CTL VCC1 19 11 FWD DO3+ 18 SLED COMMAND 12V SLED MOTOR 12 REV DO3− 17 13 DO1+ DO2+ 16 LOADING MOTOR SPINDLE MOTOR 14 12 DO1− DO2− 15 FAN8025G3 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 10/1/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation