Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER General Description Features The AM5901A is a 4-channel motor driver with power controller that includes the reset, battery charge and reduced voltage detection circuits required for portable CD/MP3/VCD players on a single chip. · · · · · · · · This kind of IC is provided with lower startup voltage and power consumption than similar products, its driver block power supply uses on-chip switching regulator, making this component an ideal choice for low-power sets. It is used in mini portable compact disc players (CDP), portable mini disc players (MD), disc-man or other portable compact disc media. The AM5901A is available in PQFP-44 and LQFP-44 packages. PQFP-44 AM5901A 4-channel H-bridge Driver Built-in DC/DC Converter Control Circuit Built-in Reset Circuit Built-in Reduced Voltage Detection Circuit Built-in Battery Charging Circuit Built-in General-purpose Operational Amplifier Built-in Thermal Shutdown Circuit Low Power Consumption Applications · · · · · Portable Compact Disc Player (CDP) Portable Mini Disc Player Portable Disc-man Portable CD/MP3/VCD Other Portable Compact Disc Media LQFP-44 Figure 1. Package Types of AM5901A Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 1 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Pin Configuration F44 Package (PQFP-44) RCHG OUT1R OUT1F OUT2R 33 32 31 30 OUT2F POWGND OUT3F 29 28 27 OUT3R OUT4F OUT4R BRAKE1 26 25 24 23 AMUTE 34 22 IN1 EMP 35 21 MUTE2 HVCC 36 20 IN2 PSW 37 19 MUTE34 CLK 38 18 IN4 START 39 17 IN3 OFF 40 16 VREF CHGVCC 41 15 SEL 42 14 OP+ PREGND 43 13 OPOUT PWMFIL 44 12 VSYS1 1 2 3 4 5 6 7 8 BSEN BATT RESET DEAD SW EO EI SPRT 9 CT 10 N.C. VSYS2 11 OP- Figure 2. Pin Configuration of AM5901A (Top View) Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 2 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Pin Configuration (Continued) LF44 Packages (LQFP-44) RCHG OUT1R OUT1F OUT2R 33 32 31 30 OUT2F POWGND OUT3F 29 28 27 OUT3R OUT4F OUT4R BRAKE1 26 25 24 23 AMUTE 34 22 IN1 EMP 35 21 MUTE2 HVCC 36 20 IN2 PSW 37 19 MUTE34 CLK 38 18 IN4 START 39 17 IN3 OFF 40 16 VREF CHGVCC 41 15 VSYS2 SEL 42 14 OP+ PREGND 43 13 OPOUT PWMFIL 44 12 VSYS1 1 2 3 4 5 6 7 8 BSEN BATT RESET DEAD SW EO EI SPRT 9 CT 10 N.C. 11 OP- Figure 3. Pin Configuration of AM5901A (Top View) Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 3 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Pin Description 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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Pin Name BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OPVSYS1 OPOUT OP+ VSYS2 VREF IN3 IN4 MUTE34 IN2 MUTE2 IN1 BRAKE1 OUT4R OUT4F OUT3R OUT3F POWGND OUT2F OUT2R OUT1F OUT1R RCHG AMUTE EMP HVCC PSW CLK START OFF CHGVcc SEL PREGND PWMFIL Function Battery voltage monitor Battery power supply input Reset detection output Dead-time setting Booster transistor drive Error amplifier output Error amplifier input Short-circuit protection setting Triangular wave output Nothing connected Operational amplifier negative input Control circuit power supply input Operational amplifier output Operational amplifier positive input Pre-driver power supply input Reference power supply input CH3 control signal input CH4 control signal input CH3/CH4 mute CH2 control signal input CH2 mute CH1 control signal input CH1 brake CH4 negative output CH4 positive output CH3 negative output CH3 positive output Power unit power ground CH2 positive output CH2 negative output CH1 positive output CH1 negative output Charging current setting Reset inversion output "Empty" detection output H-bridge power supply input PWM transistor drive External clock synchronization input Boost DC/DC converter starting Boost DC/DC converter OFF Charging circuit power supply input "Empty" detection level switching Pre-unit power supply ground PWM phase compensation Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 4 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Functional Block Diagram RCHG OUT1R OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1 33 32 31 30 29 28 27 26 25 24 23 BRAKE EMP 35 HVcc 36 PSW 37 22 + + MUTE2 34 + 19 MUTE34 + 18 IN4 + 17 IN3 + 16 VREF 15 VSYS2 14 OP+ 13 OPOUT 12 VSYS1 + 38 39 OFF 40 + START POWER OFF STARTER MUTE2 IN2 MAXIMUM DETECTION CLK 21 IN1 20 MUTE1 AMUTE TRIANGLE WAVE CHGVcc 41 SEL 42 PREGND 43 PWMFIL 44 OVER VOLTAGE + + + + ++ + 1 2 3 4 5 6 7 BSEN BATT RESET DEAD SW EO EI 8 SPRT 9 10 CT N.C. 11 OP- Figure 4. Functional Block Diagram of AM5901A Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 5 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Ordering Information - AM5901A E1: Lead Free Blank: Tin Lead Circuit Type Package F44: PQFP-44 LF44: LQFP-44 Part Number Marking ID Package Temperature Range Tin Lead Lead Free Tin Lead Lead Free PQFP-44 0 to 70oC AM5901AF44 AM5901AF44-E1 AM5901AF44 AM5901AF44-E1 LQFP-44 oC 0 to 70 AM5901ALF44 Packing Type AM5901ALF44-E1 AM5901ALF44 AM5901ALF44-E1 Tray Tray BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 6 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit VCC 13.5 V Driver Output Current IO 500 mA Power Dissipation PD 625 (Note 2) mW Operating Junction Temperature TJ 150 o TSTG -55 to 150 o Supply Voltage Storage Temperature C C Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: Power dissipation is reduced by 5mW for each increase in TA of 1oC over 25oC. Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Control Circuit Power Supply Voltage VSYS1 2.7 3.2 5.5 V Pre-driver Power Supply Voltage VSYS2 2.7 3.2 5.5 V H-bridge Power Supply Voltage HVCC PWM BATT V Power Unit Power Supply Voltage BATT (VCC) 1.6 2.4 8 V CHGVCC 3.0 4.5 8 V TA 0 25 70 oC Charging Circuit Power Supply Voltage Operating Temperature Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 7 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Electrical Characteristics (Typicals and limits apply for TA=25oC, BATT=2.4V, VSYS1=VSYS2=3.2V, VREF=1.6V, CHGVCC=0, CLK=88.2kHz, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit Common Section BATT Standby Current IST BATT=9V, VSYS1=VSYS2 =VREF=0V BATT Supply Current at No Load IBAT VSYS1 Supply Current at No Load 0 5 µA HVCC=0.45V, MUTE34=3.2V 2.5 4 mA ISYS1 HVCC=0.45V, MUTE34=3.2V, EI=0V 4.7 6.4 mA VSYS2 Supply Current at No Load ISYS2 HVCC=0.45V, MUTE34=3.2V 4.1 5.5 mA CHGVCC Supply Current at No Load ICHGVCC CHGVCC=4.5V, ROUT=OPEN 0.65 2 mA H-bridge Driver Section Voltage Gain (CH1,3,4) GVC134 12 14 16 dB Voltage Gain (CH2) GVC2 21.5 23.5 25.5 dB Gain Error by Polarity ∆GVC -2 0 2 dB IN Pin Input Resistance (CH1,3,4) RIN134 IN=1.7 and 1.8V 9.6 11 14.4 kΩ IN Pin Input Resistance (CH2) RIN2 IN=1.7 and 1.8V 6.6 7.5 9.9 kΩ Maximum Output Voltage VOUT RL=8Ω, HVCC=BATT=4V, IN=0 to 3.2V 1.9 2.1 Lower Transistor Saturated Voltage VSATL IO=-300mA, IN=0 and 3.2V 240 400 mV Upper Transistor Saturated Voltage VSATU IO=300mA, IN=0 and 3.2V 240 400 mV 8 mV Input Offset Voltage Output Offset Voltage (CH1,3,4) -8 VIO V VOO134 VREF=IN=1.6V -54 0 54 mV Output Offset Voltage (CH2) VOO2 VREF=IN=1.6V -134 0 134 mV Dead Zone VDB -15 0 15 mV BRAKE1 ON Threshold Voltage VBRON IN1=1.8V BRAKE1 OFF Threshold Voltage VBROFF IN1=1.8V MUTE2 ON Threshold Voltage VM2ON IN2=1.8V MUTE2 OFF Threshold Voltage VM2OFF IN2=1.8V Mar. 2007 Rev. 1. 3 2 V 0.8 2 V V 0.8 V BCD Semiconductor Manufacturing Limited 8 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ MUTE34 ON Threshold Voltage VM34ON MUTE34 OFF Threshold Voltage VM34OFF IN3=IN4=1.8V 2.0 V VREF ON Threshold Voltage VREFON IN1=IN2=IN3=IN4=1.8V 1.2 V VREF OFF Threshold Voltage VREFOFF IN1=IN2=IN3=IN4=1.8V BRAKE 1 Brake Current IBRAKE1 Current difference between BRAKE1 pin "H" and "L" IN3=IN4=1.8V Max Unit 0.8 V 0.8 V 4 7 10 mA PWM Power Supply Driving Section PWM Sink Current IPSW IN1=2.1V 7.9 13 17.5 mA HVCC Level Shift Voltage VSHIF IN1=1.8V, HVCC-OUT1F 0.25 0.45 0.55 V HVCC Leak Current IHLK HVCC=9V, VSYS1=VSYS2=BATT=0V 0 11 µA GPWM IN1=1.8V, HVcc=1.2 to 1.4V 1/60 1/50 1/40 1/kΩ 3.05 3.2 3.35 V 1.4 1.6 PWM Amplifier Transfer Gain DC/DC Converter Section (Error Amplifier Section) VSYS1 Pin Threshold Voltage VSITH EO Pin Output Voltage H VEOH EI=0.7V, IO=-80µA EO Pin Output Voltage L VEOL EI=1.3V, IO=80µA SPRT Pin Voltage (Normal) VSPR EI=1.3V SPRT Pin Current 1 EO=H ISPR1 EI=0.7V SPRT Pin Current 2 EO=L ISPR2 SPRT Pin Current 3 (Over-voltage) ISPR3 SPRT Pin Impedance RSPR SPRT Pin Threshold Voltage VSPTH EI=0.7, CT=0V Over-voltage Protection Detect VHVPR BSEN Pin Voltage, pin 7=1.3V, pin 12=3.2V V 0.3 V 0 0.1 V 6 10 16 µA EI=1.3V, OFF=0V 12 20 32 µA EI=1.3V, BATT=9.5V 12 20 32 µA 175 220 265 kΩ 1.1 1.2 1.3 V 8 8.6 9 V 1.13 V (Short-circuit Protection) (Transistor Driving Section) SW Pin Output Voltage 1 H VSW1H BATT=CT=1.5V, IO=-2mA, VSYS1=VSYS2=0V, at start 0.78 0.98 SW Pin Output Voltage 2 H VSW2H CT=0V, IO=-10mA, EI=0.7V, SPRT=0V 1 1.5 SW Pin Output Voltage 2 L VSW2L CT=2V, IO=10mA V 0.3 0.45 V SW Pin Oscillating Frequency 1 fSW1 CT=470pF, VSYS1=VSYS2=0, at start 65 80 95 kHz SW Pin Oscillating Frequency 2 fSW2 CT=470pF, CLK=0V 60 70 82 kHz Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 9 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Electrical Characteristics (Continued) Parameter Symbol Conditions Min SW Pin Oscillating Frequency 3 fSW3 CT=470pF SW Pin Minimum Pulse Width TSWMIN CT=470pF, EO=0.5~0.7V Sweep 0.01 Pulse Duty at Start DSW1 CT=470pF, VSYS1=VSYS2=0V 40 Max Pulse Duty at Self-Running DSW2 EI=0.7V, CT=470pF, CLK=0V, SPRT=1.1V, START not connected Max Pulse Duty at CLK Synchronization DSW3 EI=0.7V, CT=470pF, SPRT=1.1V, START not connected Typ Max 88.2 Unit kHz 0.6 µs 50 60 % 70 80 90 % 65 75 85 % (Dead Time Section) DEAD Pin Impedance RDEAD 20 25 30 kΩ DEAD Pin Output Voltage VDEAD 0.78 0.88 0.98 V VSYS1 -2 V 115 µA BATT -1 V (Interface Section) OFF Pin Threshold Voltage OFF Pin Bias Current VOFTH EI=1.3V IOFF OFF=0V 75 START Pin ON Threshold Voltage VSTATH1 VSYS1=VSYS2=0V, CT=2V START Pin OFF Threshold Voltage VSTATH2 VSYS1=VSYS2=0V, CT=2V START Pin Bias Current ISTART CLK Pin Threshold Voltage H VCLKTHH CLK Pin Threshold Voltage L VCLKTHL CLK Pin Bias Current ICLK START=0V 95 BATT -0.3 10 V 16 19 2 µA V CLK=3.2V 0.8 V 10 µA (Started Circuit Section) Starter Switching Voltage VSTMM VSYS1=VSYS2=0V to 3.2V START=0V 2.3 2.5 2.7 V Starter Switching Hysteresis Width VSNHS START=0V 18 200 300 mV 1.63 1.83 2.03 V Discharge Release Voltage VDIS (Empty Detection Section) Empty Detection Voltage 1 VEMPT1 VSEL=0V 2.1 2.2 2.35 V Empty Detection Voltage 2 VEMPT2 ISEL=-2µΑ 1.7 1.8 1.945 V Empty Detection Hysteresis Width1 VEMHS1 VSEL=0V 8 50 100 mV Empty Detection Hysteresis Width2 VEMHS2 ISEL=-2µΑ 8 50 100 mV 0.5 V 1 µA 27 kΩ EMP Pin Output Voltage VEMP IO=1mA, BSEN=1V EMP Pin Output Leak Current IEMPL BSEN=2.4V BSEN Pin Input Resistance RBSEN VSEL=0V Mar. 2007 Rev. 1. 3 17 23 BCD Semiconductor Manufacturing Limited 10 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Electrical Characteristics (Continued) Parameter Symbol BSEN Pin Leak Current IBSNL SEL Pin Detection Voltage VSELTH SEL Pin Detection Current ISELT Conditions Min Typ VSYS1=VSYS2=0V, BSEN=4.5V VSELTH=BATT-SEL, BSEN=2V Max Unit 1 µA 1.35 V -15 µA (Reset Section) VSYS1 Reset Threshold Voltage Ratio RESET Detection Hysteresis Width HSRT Ratio of VSYS1 voltage and erroramp threshold voltage VRSTHS 82.98 90 97.2 % 10 50 100 mV 0.5 V 108 kΩ IO=1mA, VSYS1=VSYS2=2.8V RESET Pin Output Voltage VRST RESET Pin Pull-up Resistance RRST AMUTE Pin Output Voltage 1 VAMTI IO=-1mA, VSYS1=VSYS2=2.8V BATT -0.4 BATT V AMUTE Pin Output Voltage 2 VAMT2 ΙO=−1mA, START=0V, VSYS1=VSYS2=0V BATT -0.4 BATT V AMUTE Pin Pull Down Resistance RAMT 113 kΩ 300 nA 5.5 mV 72 77 90 95 (Operational Amplifier Section) Input Bias Current IBIAS Input Offset Voltage VIOOP High Level Output Voltage VOHOP RL=OPEN Low Level Output Voltage VOLOP RL=OPEN OP+=1.6V -5.5 2.8 Output Driver Current (Source) ISOU Output shorted to GND By 50Ω Output Driver Current (Sink) ISIN Output shorted to VSYS By 50 Ω Open Loop Voltage GAIN GVO VIN=-75dBV, f=1kHz Slew Rate 0 0.3 SR V 0.2 V -6.5 -3 mA 0.7 2.2 mA 70 dB 0.5 V/µs (Charging Circuit Section) ISEL CHGVCC=4.5V, RCHG=1.8kΩ, VSEL=4.5V 80 150 250 mA RCHG Pin Bias Voltage VRCHG CHGVCC=4.5V, RCHG=1.8kΩ 0.745 0.81 0.960 V RCHG Pin Output Resistance RRCHG CHGVCC=4.5V, RCHG=0.5 and 0.6V 0.75 0.95 1.2 kΩ SEL Pin Leak Current 1 ISELLK1 CHGVCC=4.5V, RCHG=OPEN BATT=4.5V 1.2 µA SEL Pin Leak Current 2 ISELLK2 CHGVCC=0.6V, RCHG=1.8kΩ BATT=4.5V 1.2 µA SEL Pin Saturation Voltage VSELCG CHGVCC=4.5V, IO=300mA, RCHG=0Ω 1 V SEL Pin Charging Current Mar. 2007 Rev. 1. 3 0.45 BCD Semiconductor Manufacturing Limited 11 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A 3 3 2 2 Output Voltage (CH2): VO (V) Output Voltage (CH1,3,4): VO (V) Typical Performance Characteristics 1 0 RL=Infinite RL=20Ω RL=8Ω RL=4Ω -1 -2 1 RL=Infinite RL=20Ω RL=8Ω RL=4Ω 0 -1 -2 -3 -0.6 -0.4 -0.2 0.0 0.2 0.4 -3 -0.3 0.6 -0.2 -0.1 Input Voltage: VIN (V) 0.0 0.1 0.2 0.3 Input Voltage: VIN (V) Figure 6. Input Load Fluctuation (CH2, Note 3)) Figure 5. Input Load Fluctuation (CH1, 3, 4, Note 3) 1.8 3.5 RESET Output Voltage (V) EO, DEAD Output Voltage (V) 1.6 1.4 1.2 1.0 0.8 0.6 EO Pin DEAD Pin 0.4 2.5 2.0 1.5 1.0 0.5 0.2 0.0 0.0 3.0 0.5 1.0 1.5 2.0 2.5 3.0 0.0 0.0 3.5 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VSYS1 (V) VSYS1 (V) Figure 8. RESET Pin Voltage Figure 7. Error Amplifier Output Voltage Note 3: Input voltage herein is referenced to Bias pin voltage. Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 12 4.0 OFF 1N5817 CLK 2SA1585 EMP To System Micro Controller BU34381 (or BU34581) W1 (Pin 44) PLAY 33µH Play 47µ / 6V 0.1µ 10P 47 Mar. 2007 Rev. 1. 3 13 44 43 42 41 0.1µ 100k 220µ/ 10V 1 2 0.1µ 29 28 27 26 25 4 5 3.3n 7 22k 2SC4115 or 2SD2150 2SC4115 or 2SD2150 6 47p 1µ 8 100 1mH 1k 9 AM5901A 30 10 10 24 470p 0.1µ TRACKING 680k/ NC 1000p RESET 3 31 FOCUS 0.1µ 11 23 0.1µ 12 13 14 15 16 17 18 19 20 21 22 220µ/10V VOUT MUTE 2 VREF MUTE 34 To System Micro Controller BRAKE 1 IN4 40 32 M SPINDLER IN2 39 38 37 36 35 34 33 M TRAVERSE IN1 2200p AMUTE Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Typical Application Servo Processor IN3 0.1µ 1.8k Figure 9. Typical Application 1 of AM5901A in Portable CD/VCD Player BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Application Information H-Bridge Driver DC/DC Converter Control Circuit 1. Mute Function Brake function is assigned to CH1, mute function is assigned to other 3 channels. (1) CH1 is in normal operation when the BRAKE pin is low (high when CH1 mute on), and enters a brake mode. (2) CH2 is in normal operation when the MUTE2 pin is low (high when CH2 mute on). (3) CH3,4 are in normal operation when the MUTE34 pin is high (low when CH3,4 mute on). 1. Output Voltage Booster circuit of voltage (VSYS1) can be configured with external component. The voltage is defined as follows. VSYS1 12 R1 R2 R1*R3 R2*R4 + (R2+R4) (R1+R3) VSYS1 = 1.245 * GV=20 log | 110k/(R+7.5k)| (V) R2*R4 (R2+R4) R1 = External Resistance R2 = External Resistance R3 = 35kΩ R4 = 21kΩ 4. Driver Gain Driver input resistance is 11kΩ (CH1, CH3, CH4) and 7.5kΩ (CH2). Driver gain can be calculated by the expression. CH2 R4 1.245V 3. Thermal Shutdown If the chip temperature rises above 140 oC, then the thermal shutdown (TSD) circuit is activated and the output current is cut. When the chip temperature has dropped to 100oC, then output current begins to flow. GV=20 log |55k/(R+11k)| R3 7 2. VREF Drop Mute When the voltage impressed to VREF terminal is 1.0V (Typ.) or less, impedance of driver output becomes "high". CH1,3,4 EI 2. Short-Circuit Protection Function When the output of error amplifier is "H", if the voltage of SPRT terminal has reached 1.245V (Typ.) upon charging the terminal, switching of SW terminal is disabled. Time to disable switching depends on the capacitor of SPRT terminal and it can be calculated by the expression: R is an external resistance The power supply of driver output stage is HVCC terminal and that of pre-driver circuit is VSYS2 terminal. Attach a by-pass capacitor (approximately 0.1µF) between the power supplies as near as possible to this chip. t=CSPRT * VTH/ISPRT (sec) (VTH=1.245V, ISPRT=10µA) Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 14 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Application Information (Continued) 3. Soft-Start Function The soft-start is functioned by putting a capacitor between DEAD terminal and GND, the maximum duty can be changed by attaching a resistance to pin 4. 0.1 µ F HVcc 36 + 47 µ F t = CDEAD * R (sec) (R=65kΩ) 33 µ H 4. Power-Off Operation SPRT terminal is charged by setting OFF terminal to "L". Then, switching of SW terminal is terminated when the voltage of the SPRT terminal has reached 1.245V (Typ.). Time to disable switching depends on a capacitor of the SPRT terminal and it can be calculated by the expression: SBD PSW PWMFIL 37 47 Ω 44 100k t = CSPRT * VTH/IOFF (sec) (VTH = 1.245V, IHV = 20µA) 10pF 2200pF 5. Over-Voltage Protection Operation When the voltage applied to BSEN terminal has been 8.4V (Typ.), SPRT terminal is charged. Then, switching of SW terminal is terminated when the voltage of the SPRT terminal has reached 1.245V (Typ.). Time to disable switching depends on a capacitor of SPRT terminal and it can be calculated by the expression: "Empty" Detector Unit When the voltage applied to BSEN terminal has reached the detecting voltage or less. EMP terminal varies from "H" to "L" (open collector output). Hysteresis of 50mV (Typ.) is set to the detecting voltage to prevent the output chattering. The detecting voltage varies depending on SEL terminal as follows: t = CSPRT * VTH/IHV (sec) (VTH = 1.245V, IHV = 20µA) Detecting Voltage Return Voltage L 2.2V (Typ.) 2.25V (Typ.) High-Z 1.8V (Typ.) 1.85V (Typ.) SEL Pin PWM Power Supply Driver Circuit This circuit detects a maximum output level of drivers of four channels and performs the PWM supply of load drive power supply. This circuit uses PNP transistor, Schottky Diode and capacitor as external component. Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 15 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Application Information (Continued) Reset Circuit Upon 90% of DC/DC converter output voltage, RESET terminal varies from "L" to "H" and AMUTE terminal changes from "H" to "L". Hysteresis of 50mV (Typ.) is set to the reset voltage to prevent the output chattering. other circuits. Charging current is set by the resistance between RCHG terminal and GND. The charging current takes constant current through SEL terminal. This circuit has a private thermal shutdown circuit. When the chip temperature has risen to 140oC, the charging current is cut off. When the chip temperature has dropped to 100oC, the charging current begins to flow. Charging Circuit The power supply of the charging unit is from CHGVCC terminal and it is independent of any Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 16 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Mechanical Dimensions LQFP-44 Unit: mm(inch) 11.800(0.465) 12.200(0.480) 9.900(0.390) 10.100(0.398) 11.800(0.465) 12.200(0.480) 9.900(0.390) 10.100(0.398) 0.050 (0.002) 0.150 (0.006) 0° 7° 1.600 (0.063) MAX 0.300(0.012) 0.450(0.018) 0.800(0.031) TYP 0.450(0.018) 0.750(0.030) 0.125 (0.005) TYP 1.350(0.053) 1.450(0.057) Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 17 Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER AM5901A Mechanical Dimensions (Continued) PQFP-44 Unit: mm(inch) 12.950(0.510) 13.800 (0.543) 9.900(0.390) 10.100(0.398) 12.950(0.510) 13.800 (0.543) 9.900(0.390) 10.100(0.398) 0.250(0.010) MIN 0° 7° 2.450(0.096) MAX 0.300(0.012) 0.450(0.018) 0.800(0.031) TYP 0.730(0.029) 1.030(0.041) 0.130(0.005) 0.230(0.009) 1.950(0.077) 2.100(0.083) Mar. 2007 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 18 http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788