FAN8705 5 Channel DSC Motor Driver Features Description n Built in power save function The FAN8705 is a DSC lens motor driver and it’s consist of constant current and constant voltage drive blocks suitable for shutter, single iris,auto-focus and zoom motor drive. n Built in UVLO function. n Constant current drive for shutter. n Low Ron resistance (1.1 Ω @ 0.2A) 40MLP5X5 n Constant voltage drive for CH1~CH3. n Pseudo sinewave control for AF. n Three input 2-2 phase control for AF n Built in short circuit protection. n TSD protection. Applications n DSC, Mobile phone camera Ordering Information ©2005 Fairchild Semiconductor Corporation FAN8705 Rev. 1.0.1 1 Device Package Operating Temp. FAN8705 40-MLP −25°C ~ 80°C www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver March 2005 IN1 30 PGND2 29 OUT5 28 OUT6 27 OUT7 OUT8 26 25 SGND 24 VREF ADJ1 ADJ2 23 22 21 IN2 31 20 ADJ3 IN3 32 19 PS VM2 33 18 SEL IN4 34 17 VDD IN5 35 16 VM3 IN6 36 15 GAIN1 IN7 37 14 GAIN2 VM1 38 13 VM4 IN8 39 12 GAIN3 IN9 40 11 FC2 FAN8705MP 1 2 3 4 5 6 1N10 PGND1 OUT1 OUT2 OUT3 OUT4 2 FAN8705 Rev. 1.0.1 7 OUT9 8 OUT10 9 FC1 10 RS www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Pin Assignments Pin Number Pin Name I/O Pin Function Description 1 IN10 I Logic input 10 2 PGND1 P Power ground 1 for Out 1~4 3 OUT1 A Motor output 1 4 OUT2 A Motor output 2 5 OUT3 A Motor output 3 6 OUT4 A Motor output 4 7 OUT9 A Motor output 9 8 OUT10 A Motor output 10 9 FC1 A Compensation 1 10 RS A Motor current sensing for Out9~10 11 FC2 A Compensation 2 12 GAIN3 I Gain select for Out9~10 13 VM4 P Power supply for Out9~10 14 GAIN2 I Gain select for Out5~6 15 GAIN1 I Gain select for Out1~4 16 VM3 P Power supply for Out7~8 17 VDD P Logic power supply 18 SEL I CH1,2 logic input change 19 PS I Power save 20 ADJ3 A Out9~10 current adjust 21 ADJ2 A Out5~6 voltage adjust 22 ADJ1 A Out1~4 voltage adjust 23 VREF A Reference output 24 SGND P Signal ground 25 OUT8 A Motor output 8 26 OUT7 A Motor output 7 27 OUT6 A Motor output 6 28 OUT5 A Motor output 5 29 PGND2 P Power ground 2 for Out5~8 30 IN1 I Logic input 1 31 IN2 I Logic input 2 32 IN3 I Logic input 3 33 VM2 P Power supply for Out5~6 34 IN4 I Logic input 4 35 IN5 I Logic input 5 36 IN6 I Logic input 6 Logic input 7 37 IN7 I 38 VM1 P Power supply for Out1~4 39 IN8 I Logic input 8 40 IN9 I Logic input 9 3 FAN8705 Rev. 1.0.1 Remark www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Pin Definitions 3 OUT1 4 OUT2 5 OUT3 VM1 6 OUT4 16 VM3 13 VM4 Constant voltage H-bridge CH1 OUT6 26 OUT7 VM2 38 VM1 33 VM2 27 28 OUT5 Constant voltage H-bridge CH2 25 OUT8 7 VM4 VM3 Constant voltage H-bridge CH3 8 OUT10 OUT9 Constant current H-bridge CH5 Saturated H-bridge CH4 RS 29 PGND2 2 PGND1 PGND1 4.9X CH3 R 4.9X 21 Gain control 2R 2R 22 7R R R CH1,2 10 PGND2 Voltage Reference ADJ3 20 2R R R ADJ1 FC1 Feed back Compensation ADJ2 9 FC2 11 CH1 CH2 CH3 CH4 CH5 23 VREF VDD Output stage TSD Output stage UVLO GAIN control Logic GAIN1 GAIN2 GAIN3 15 14 4 FAN8705 Rev. 1.0.1 Logic Reference out 12 PS 19 SEL IN1~IN10 17 SGND 24 18 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Block Diagram FAN8705 5 Channel DSC Motor Driver Equivalent Circuits Logic Input 30 31 ADJ1, ADJ2 23 1K 32 34 10K 35 36 100K 37 39 21 22 40 01 30K 18 12 14 15 FC1, FC2 ADJ3 VM 23 70K 20 09 11 30K OUT7, OUT8 OUT1 ~ 6 VM VM 25 26 27 03 04 05 06 27 28 50K 5 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Equivalent Circuits OUT9, OUT10, RS PS 100K VM 19 100K 07 08 10 6 FAN8705 Rev. 1.0.1 www.fairchildsemi.com Parameter Symbol Maximum power supply voltage Value Unit VDDMAX,VMMAX 5.5 V Rja 100/52 oC/W Maximum power dissipation PDMAX 1.25/2.4 W Maximum output voltage VOMAX 6.5 V Maximum output current IOMAX 0.8 A Operating temperature TOPR −25 ~ 85 °C Storage temperature TSTG −55 ~ 150 °C Thermal resistance note 1. Should not exceed PD or ASO value. 2. Refer: EIA/JESD 51-2 & EIA/JESD 51-3 & EIA/JESD 51-5 & EIA/JESD 51-7 3. Case 1: Single layer PCB with 1 signal plane only, PCB size 76mm × 114mm × 1.6mm. 4. Case 2: Multi layer PCB with 1 signal, 1 power and 1 ground planes, PCB size 76mm × 114mm × 1.6mm, Cu plane sizes for power and ground 74mm × 74mm × 0.035mm. Case 1 Case 2 Remark Power plane(Cu) Pd is measured base on the JEDEC/ STD(JESD 51-2) GND plane(Cu) PCB(glass-epoxy) Pd=1.25W Pd=1.8W Recommended Operating Conditions (Ta = 25°C) Parameter Symbol Min. Typ. Max. Unit Supply voltage VDD 2.4 − 5.0 V Power Dissipation Curve 2.0 Case2 1.5 Case1 1.0 SOA 0.5 0 0 25 50 75 100 125 150 175 Ambient temperature, Ta [°C] PCB condition : When mounted on 76.2mm × 114mm × 1.57mm PCB (glass epoxy material). 7 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Absolute Maximum Ratings (Ta = 25°C) (Ta = 25°C, VDD =VM = 3V unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit Total Standby current ISTB PS = L - - 1 µA VDD Operating current IOPR PS = H - 1 3 mA Low voltage protection off VUVLOF - - 2.39 V Low voltage protection on VUVLO 1.8 - - V Input stage Logic input high voltage VIH 0.7XVDD - - V Logic input low voltage VIL - - 0.3XVDD V Logic input high current IIH Vinput = 3V - 40 60 µA Logic input low current IIL Vinput = 0V -1 - - µA Output Stage Ron resistance(CH1~CH4) RON1 IO=200mA (Upper+Lower) - 1.1 1.5 Ω Ron resistance(CH5) RON2 IO=200mA (Upper+Lower) - 0.9 1.3 Ω 1.85 1.95 2.05 V 279 300 321 mA 0.93 0.98 1.03 V Constant voltage output Vin=0.4V Constant current accuracy Reference Reference voltage VREF IREF=2mA 8 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver FAN8705 Electrical Characteristics (Ta = 25°C, VDD =VM = 3V unless otherwise specified) CH1,2,3 Constant voltage H-bridge switching time note1 Output turn on time Output turn off time TON Input rising time = 20ns Input 50% output 50% 1.5 3 µS TOFF Input rising time = 20ns Input 50% output 50% 0.03 0.1 µS Tr Input rising time = 20ns Output voltage 10% to 90% 1.5 3 µS Tf Input rising time = 20ns Output voltage 90% to 10% note1 0.03 0.1 µS Output rising time Output falling time CH4 Saturated H-bridge switching time Output turn on time Output turn off time Output rising time Output falling time TON4 Input rising time = 20ns Input 50% output 50% 0.2 0.5 µS TOFF4 Input rising time = 20ns Input 50% output 50% 0.15 0.3 µS Tr4 Input rising time = 20ns Output voltage 10% to 90% 0.1 0.3 µS Tf4 Input rising time = 20ns Output voltage 90% to 10% note1 0.03 0.1 µS CH5 Constant current switching time Output turn on time Output turn off time Output rising time Output falling time TON5 Input rising time = 20ns Input 50% output 50% 0.5 1 µS TOFF5 Input rising time = 20ns Input 50% output 50% 0.07 0.2 µS Tr5 Input rising time = 20ns Output voltage 10% to 90% 0.1 0.3 µS Tf5 Input rising time = 20ns Output voltage 90% to 10% 0.03 0.1 µS note 1. Guaranteed by design. not tested Brake mode Rotation mode 100% 100% VIN VIN 50% 50% TON 90% Hi- impedance T ON 0% 90% 90% 90% 50% 50% 50% IOUT 10% 10% 10% Tr Tf Tf 9 FAN8705 Rev. 1.0.1 50% T OFF TOFF 100% IOUT 50% 50% -100% 10% Tr www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Switching characteristics IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 IN9 IN10 SEL CH1 L L L L L L L L L L L L OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 OUT 9 OUT 10 Remark Z Z Z Z Z Z Z Z Z Z Standby Z Z Z L H L H Rotation H L H L Rotation H H Z Z Z CH2 CH1 ~ CH2 L OUT 1 L L L Z Z Z L H L H Rotation H L H L Rotation H H Z Z Z L L Z Z Z L H Z Z Z H L H L Rotation H H L H 2-2 phase L L H Rotation Z Z Z L H Z Z Z H L H L Rotation H H L H Rotation CH3 CH4 CH5 L L Z Z Z L H L H Rotation H L H L Rotation H H L L L L L H H L H H * Brake Z Z Z L H Rotation H L Rotation L L Brake L L Z Z Z L H L H Rotation H L H L Rotation H H Z Z Z Gain control Gain control GAIN1 GAIN2 GAIN3 Input H-bridge output control voltage L ADJ1 H 0.67XADJ1 L ADJ2 H 0.33XADJ2 L ADJ3 H 0.33XADJ3 CH1,CH2 CH 3 CH 5 10 FAN8705 Rev. 1.0.1 Remark www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Operation Truth Table Figure 1. VDD vs IOPR Figure 2. VDD vs ISTB 3.00 1200.0 2.50 1000.0 2.00 ISTB (nA) IDD (uA) 800.0 600.0 400.0 1.50 1.00 200.0 0.50 0.0 -200.0 0 1 2 3 4 5 0.00 6 0 1 2 3 4 5 6 -0.50 VDD (V) VDD (V) Figure 3. VDD vs IDD Figure 4.IREF vs VREF (VDD = 3V) 1.20 1.040 1.00 1.020 1.000 VREF (V) VREF (V) 0.80 0.60 0.40 0.980 0.960 0.940 0.20 0.920 0.00 0 1 2 3 4 5 0.900 6 0 -0.20 1 2 3 4 5 IREF (mA) VDD (V) Figure 3. RON vs IM (VDD = 3V) Figure 4.RON vs VM (VDD = 3V) 1.6 1.40 1.4 RON1 1.20 RON1 1.2 1.00 1.0 RON (OHM) RON (OHM) RON2 0.8 0.6 0.60 0.4 0.40 0.2 0.20 0.0 RON2 0.80 0.00 0.0 0.2 0.4 0.6 0.8 1 IM (A) 3 4 5 VM (V) 11 FAN8705 Rev. 1.0.1 2 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Typical Performance Characteristics 1. Channel 1 and Channel 2 CH1 and CH2 are constant voltage driver. The output voltage can be calculated by following equations. when, Gain1 = low,. V MOTOR = V ADJ1 × 4.9 – V DSON ≈ V ADJ1 × 4.9 = 3.6V when, Gain1 = high 2 2 V MOTOR = V ADJ1 × --- × 4.9 – V DSON ≈ V ADJ1 × --- × 4.9 = 2.4V 3 3 where, VMOTOR is motor driving voltage. VDSON is drain-source voltage of output lower MOSFET in on time, It’s less than 0.1V@300mA. VADJ1 is about 0.75V typically as following equation. It can be adjusted by installing external resister RADJ1.Calculated VMOTOR should be less than power supply voltege VM1 for operating constant voltage mode. 3 V ADJ1 = --- × V ref 4 VM1 IN1,2 IN3,4 Vref OUT1,3 R ADJ1 L VADJ1 RADJ1 4.9X R Constant Voltage H-bridge CH1,2 H OUT2,4 2R PGND1 GAIN1 12 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Application Information 1.1.1 Three Input 2-2 Phase Excitation SEL IN1/IN3 IN2 IN4 OUT1 OUT2 OUT3 OUT4 Function L X X Z Z Z Z Stand-by(Stop) H L L H L H L S1 H H L L H H L S2 H H H L H L H S3 H L H H L L H S4 H note 1. X : Don’t care. 2. Z : High impedence. IN1 & IN3 IN2 Don’t care IN4 CH1 Current High Impedence CH2 Current S1 S2 S3 S4 VM1 OUT1 IN1 Constant Voltage H-bridge CH1 IN2 DSP or Micom IN3 Constant Voltage H-bridge CH2 IN4 VDD SEL 13 FAN8705 Rev. 1.0.1 STEP M OUT2 OUT3 OUT4 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 1.1 Stepping-Motor Drive SEL H IN1 IN2 IN3 IN4 OUT1 OUT2 OUT3 OUT4 Function L L L L Z Z Z Z Stand-by(Stop) H L H L H L H L S1 L X H L Z Z H L S2 H H H L L H H L S3 H H L X L H Z Z S4 H H H H L H L H S5 L X H H Z Z L H S6 H L H H H L L H S7 H L L X H L Z Z S8 note 1. X : Don’t care. 2. Z : High impedence. IN1 IN2 IN3 IN4 CH1 Current CH2 Current S1 S2 S3 S4 S5 S6 S7 S8 High Impedence Don’t care VM1 OUT1 IN1 Constant Voltage H-bridge CH1 IN2 DSP or Micom IN3 Constant Voltage H-bridge CH2 IN4 VDD SEL 14 FAN8705 Rev. 1.0.1 STEP M OUT2 OUT3 OUT4 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 1.1.2 Four Input 1-2 Phase Excitation Mode1 SEL L IN1 IN2 IN3 IN4 OUT1 OUT2 OUT3 OUT4 Function L L L L Z Z Z Z Stand-by(Stop) H L H L H L H L S1 H H H L Z Z H L S2 L H H L L H H L S3 L H H H L H Z Z S4 L H L H L H L H S5 L L L H Z Z L H S6 H L L H H L L H S7 H L L L H L Z Z S8 note 1. Z : High impedence. IN1 IN2 IN3 IN4 CH1 Current CH2 Current S1 S2 S3 S4 S5 S6 S7 S8 High Impedence VM1 IN1 Constant Voltage H-bridge CH1 IN2 DSP or Micom IN3 Constant Voltage H-bridge CH2 IN4 OUT1 STEP M OUT2 OUT3 OUT4 SEL 15 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 1.1.3 Four Input 1-2 Phase Excitation Mode2 SEL IN1 IN2 L IN3 IN4 GAIN1 OUT1 OUT2 OUT3 OUT4 Function L L L L X Z Z Z Z Stand-by(Stop) H L H L H H L H L S1 H H H L L Z Z H L S2 L H H L H L H H L S3 L H H H L L H Z Z S4 L H L H H L H L H S5 L L L H L Z Z L H S6 H L L H H H L L H S7 H L L L L H L Z Z S8 note 1. X : Don’t care. 2. Z : High impedence. IN1 IN2 IN3 IN4 GAIN1 CH1 Current CH2 Current S1 S2 S3 S4 S5 S6 S7 S8 High Impedence Don’t care VM1 OUT1 IN1 Constant Voltage H-bridge CH1 IN2 DSP or Micom IN3 Constant Voltage H-bridge CH2 IN4 GAIN1 STEP M OUT2 OUT3 OUT4 SEL 16 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 1.1.4 Pseudo Sine Wave Excitation CH3 is constant voltage driver. The output voltage can be calculated by following equations. When, Gain2 = low,. V MOTOR = V ADJ2 × 4.9 – V DSON ≈ V ADJ2 × 4.9 = 3.6V when, Gain2 = high 1 1 V MOTOR = V ADJ2 × --- × 4.9 – V DSON ≈ V ADJ2 × --- × 4.9 = 1.2V 3 3 where, VMOTOR is motor driving voltage. VDSON is drain-source voltage of output lower MOSFET in on time, It’s less than 0.1V@300mA. VADJ2 is about 0.75V typically as following equation. can be adjusted by installing external resister RADJ2.Calculated VMOTOR should be less than power supply voltege VM2 for operating constant voltage mode. 3 V ADJ2 = --- × V ref 4 VM2 IN5,6 Vref OUT5 R ADJ2 Constant Voltage H-bridge CH3 L VADJ2 4.9X 2R RADJ2 Iris H OUT6 R PGND2 GAIN2 3. Channel 4 Channel 4 is operated by saturated H-bridge mode. VM3 IN7 IN8 OUT7 Saturated H-Bridge CH4 DC M OUT8 PGND2 17 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 2. Channel 3 Channel 5 is constant current driver. motor current is determined by ADJ3 voltage VADJ3, sensing resistance RSENSE and GAIN3 input and calculated by the following equation. when, GAIN3 = Low V ADJ3 I MOTOR = --------------------------------R Sense + R W when, GAIN3 = High V ADJ3 × 1 ⁄ 3 I MOTOR = --------------------------------R Sense + R W where, RW is internal bonding resistance and metal resistance is around 0.05Ω VM4 IN9,10 Vref OUT9 Constant current H-bridge CH5 7R ADJ3 L VADJ3 RADJ3 2R Shutter OUT10 H R RW FC1 FC2 RS RSense GAIN3 If oscillation or overshoot will be appeared in the output terminals, add external capacitors at FC1 and FC2 terminals. The output response time depend on the FC1/FC2 capacitance and interval of input signal. 18 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 4. Channel 5 Saturated H-bridge drive mode can be implemented using the constant current drive block or the constant voltage drive blocks. 6.1 Saturated H-Bridge Drive Using Constant Current Drive Block Saturated H-bridge drive mode using the constant current dirve block can be operated with ADJ3 connected to VREF input and current sensing terminal RS connected to ground. VM4 VREF OUT9 Voltage Reference Constant current H-bridge CH5 ADJ3 DC M OUT10 IN9,10 RS 6.2 Saturated H-Bridge Drive Using Constant Voltage Drive Block GAIN1/GAIN2 pin is open or connected to ground and ADJ1/ADJ2 input should be connected to VREF when VM1/ VM2 is less than 5V. If VM1/VM2 is more than 5V, ADJ1/ADJ2 input should be connected to power supply input. VM1/VM2 VREF OUT1,3/ OUT5 Voltage Reference Constant Voltage H-bridge CH1,2,3 ADJ1/ ADJ2 4.9X IN1,2,3,4/ IN5,6 DC M OUT2,4/ OUT6 GAIN1/ GAIN2 19 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 6. Saturated H-Bridge Drive The typical timing chart to get 1 frame of still image or motion pictures for shutter operation is shown following fig. If shutter is fully opened within some time interval(to1) depending on shutter motor and mechanism, then we don’t need to operate shutter motor to be opened more in ’WEAK OPEN’(to2). In other words we simply maintain the shutter open. The method to maintain this is to reduce shutter current by control GAIN3 input. So, battery power can be saved. and ’WEAK CLOSE’ is the same. To : High speed shutter motor : 1/5000s Bulb shutter : > 1sec tc1 tc2 OPEN IDLE OPEN Shutter motor OPEN WEAK OPEN CLOSE to1 to2 IDLE OPEN 0 ~ OO WEAK CLOSE 20ms 20ms Total Open Shutter Speed Total Close t0 t1 t2 t3 Effective Exposure time To1 t4 t5 Image Data Storing Start To2 IN9 IN10 GAIN3 Ishutter T1 20 FAN8705 Rev. 1.0.1 T2 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 5. Power Saving A short circuit can occur for many reasons , a short on the load, a mistake during the connection of the wires between the device and the load, an accidental short between the wires and so on. The outputs are not protected against the short circuit and if a short occurs, the big amount of current flowing through the outputs can destroy the device. To avoid this risk can be useful to add a circuitry to protect the device. FAN8705 have two types of short circuit protection, output to output short and output to ground short. 8. Thermal Shutdown Thermal Shutdown Circuit turns OFF all outputs when the junction temperature typically reaches 175°C. It is intended to protect the device from failures due to excessive junction temperature. The Thermal Shutdown has the hysteresis of 25°C approximately. 21 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 7. Short Circuit Protection DC M STEP M Single iris Auto-focus 3 OUT1 4 OUT2 5 OUT3 VM1 6 OUT4 16 VM3 13 VM4 Constant voltage H-bridge CH1 OUT6 26 OUT7 VM2 38 VM1 33 VM2 27 28 OUT5 Constant voltage H-bridge CH2 Shutter Zoom 25 OUT8 7 VM4 VM3 Constant voltage H-bridge CH3 8 OUT10 OUT9 Constant current H-bridge CH5 Saturated H-bridge CH4 RS 29 PGND2 2 PGND1 PGND1 4.9X 21 Gain control CH3 R 4.9X 2R 2R 22 7R R R CH1,2 10 PGND2 Reference 1V ADJ3 20 2R R R ADJ1 FC1 Feed back Compensation ADJ2 9 FC2 11 CH1 CH2 CH3 CH4 CH5 23 VREF VDD Output stage TSD Output stage UVLO GAIN control Logic Reference out Logic GAIN1 GAIN2 GAIN3 15 14 12 PS 19 SEL IN1~IN10 17 SGND 24 18 DSP 22 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver Typical Application Circuits 1 FAN8705 5 Channel DSC Motor Driver Package Dimensions (Unit: mm) Recommended Design 23 FAN8705 Rev. 1.0.1 www.fairchildsemi.com FAN8705 5 Channel DSC Motor Driver 24 FAN8705 Rev. 1.0.1 www.fairchildsemi.com