AM5901AF44

Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER General Description 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. AM5901A Features · · · · · · · · 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 PQFP-44 LQFP-44 Figure 1. Package Types of AM5901A Mar. 2007 Rev. 1. 3 1 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Pin Configuration F44 Package (PQFP-44) RCHG OUT1R OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1 AM5901A 33 AMUTE 32 31 30 29 28 27 26 25 24 23 22 21 IN1 34 35 EMP MUTE2 HVCC 36 37 20 19 IN2 PSW 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 1 2 3 4 5 6 7 8 9 10 11 12 VSYS1 BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP- Figure 2. Pin Configuration of AM5901A (Top View) Mar. 2007 Rev. 1. 3 2 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Pin Configuration (Continued) LF44 Packages (LQFP-44) RCHG OUT1R OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1 AM5901A 33 AMUTE 32 31 30 29 28 27 26 25 24 23 22 21 IN1 34 EMP 35 MUTE2 HVCC 36 20 19 IN2 PSW 37 MUTE34 CLK 38 18 IN4 START 39 40 17 IN3 OFF 16 VREF CHGVCC 41 15 VSYS2 SEL 42 14 OP+ PREGND 43 13 OPOUT PWMFIL 44 1 2 3 4 5 6 7 8 9 10 11 12 VSYS1 BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP- Figure 3. Pin Configuration of AM5901A (Top View) Mar. 2007 Rev. 1. 3 3 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER 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 Mar. 2007 Rev. 1. 3 4 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 BCD Semiconductor Manufacturing Limited AM5901A Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Functional Block Diagram AM5901A RCHG OUT1R OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1 33 32 31 30 29 28 27 26 25 24 23 BRAKE AMUTE 34 22 IN1 EMP 35 + + + MUTE2 21 MUTE2 HVcc 36 20 IN2 PSW 37 MAXIMUM DETECTION + + POWER OFF STARTER MUTE1 19 MUTE34 CLK 38 18 IN4 START 39 + + TRIANGLE WAVE 17 IN3 + OFF 40 16 VREF CHGVcc 41 15 VSYS2 OVER VOLTAGE SEL 42 14 OP+ PREGND 43 + + + ++ + + 13 OPOUT PWMFIL 44 12 VSYS1 1 2 3 4 5 6 7 8 9 10 11 BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP- Figure 4. Functional Block Diagram of AM5901A Mar. 2007 Rev. 1. 3 5 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Ordering Information AM5901A AM5901A E1: Lead Free Blank: Tin Lead Circuit Type Package F44: PQFP-44 LF44: LQFP-44 Package PQFP-44 LQFP-44 Temperature Range 0 to 70oC 0 to 70 oC Part Number Tin Lead AM5901AF44 AM5901ALF44 Lead Free AM5901AF44-E1 Marking ID Tin Lead AM5901AF44 Lead Free AM5901AF44-E1 Packing Type Tray Tray AM5901ALF44-E1 AM5901ALF44 AM5901ALF44-E1 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Mar. 2007 Rev. 1. 3 6 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Absolute Maximum Ratings (Note 1) Parameter Supply Voltage Driver Output Current Power Dissipation Operating Junction Temperature Storage Temperature Symbol VCC IO PD TJ TSTG Value 13.5 500 625 (Note 2) 150 -55 to 150 Unit V mA mW o o AM5901A 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 Control Circuit Power Supply Voltage Pre-driver Power Supply Voltage H-bridge Power Supply Voltage Power Unit Power Supply Voltage Symbol VSYS1 VSYS2 HVCC BATT (VCC) CHGVCC TA 1.6 3.0 0 Min 2.7 2.7 Typ 3.2 3.2 PWM 2.4 4.5 25 Max 5.5 5.5 BATT 8 8 70 Unit V V V V V oC Charging Circuit Power Supply Voltage Operating Temperature Mar. 2007 Rev. 1. 3 7 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER 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 Common Section BATT Standby Current BATT Supply Current at No Load VSYS1 Supply Current at No Load IST IBAT ISYS1 ISYS2 ICHGVCC BATT=9V, VSYS1=VSYS2 =VREF=0V HVCC=0.45V, MUTE34=3.2V HVCC=0.45V, MUTE34=3.2V, EI=0V HVCC=0.45V, MUTE34=3.2V CHGVCC=4.5V, ROUT=OPEN 0 2.5 4.7 4.1 0.65 5 4 6.4 5.5 2 µA mA mA mA mA Symbol Conditions Min Typ Max Unit AM5901A VSYS2 Supply Current at No Load CHGVCC Supply Current at No Load H-bridge Driver Section Voltage Gain (CH1,3,4) Voltage Gain (CH2) Gain Error by Polarity IN Pin Input Resistance (CH1,3,4) IN Pin Input Resistance (CH2) Maximum Output Voltage Lower Transistor Saturated Voltage Upper Transistor Saturated Voltage Input Offset Voltage Output Offset Voltage (CH1,3,4) Output Offset Voltage (CH2) Dead Zone BRAKE1 ON Threshold Voltage BRAKE1 OFF Threshold Voltage MUTE2 ON Threshold Voltage MUTE2 OFF Threshold Voltage GVC134 GVC2 ∆GVC RIN134 RIN2 VOUT VSATL VSATU VIO VOO134 VOO2 VDB VBRON VBROFF VM2ON VM2OFF IN1=1.8V IN1=1.8V IN2=1.8V IN2=1.8V VREF=IN=1.6V VREF=IN=1.6V IN=1.7 and 1.8V IN=1.7 and 1.8V RL=8Ω, HVCC=BATT=4V, IN=0 to 3.2V IO=-300mA, IN=0 and 3.2V IO=300mA, IN=0 and 3.2V 12 21.5 -2 9.6 6.6 1.9 14 23.5 0 11 7.5 2.1 240 240 16 25.5 2 14.4 9.9 dB dB dB kΩ kΩ V 400 400 8 mV mV mV mV mV mV V -8 -54 -134 -15 2 0 0 0 54 134 15 0.8 2 0.8 V V V Mar. 2007 Rev. 1. 3 8 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Electrical Characteristics (Continued) Parameter MUTE34 ON Threshold Voltage MUTE34 OFF Threshold Voltage VREF ON Threshold Voltage VREF OFF Threshold Voltage BRAKE 1 Brake Current Symbol VM34ON Conditions IN3=IN4=1.8V 2.0 1.2 0.8 4 7 10 Min Typ Max 0.8 Unit V V V V mA AM5901A VM34OFF IN3=IN4=1.8V VREFON VREFOFF IBRAKE1 IN1=IN2=IN3=IN4=1.8V IN1=IN2=IN3=IN4=1.8V Current difference between BRAKE1 pin "H" and "L" IN1=2.1V IN1=1.8V, HVCC-OUT1F HVCC=9V, VSYS1=VSYS2=BATT=0V IN1=1.8V, HVcc=1.2 to 1.4V PWM Power Supply Driving Section PWM Sink Current HVCC Level Shift Voltage HVCC Leak Current PWM Amplifier Transfer Gain DC/DC Converter Section (Error Amplifier Section) VSYS1 Pin Threshold Voltage EO Pin Output Voltage H EO Pin Output Voltage L (Short-circuit Protection) SPRT Pin Voltage (Normal) SPRT Pin Current 1 EO=H SPRT Pin Current 2 EO=L SPRT Pin Current 3 (Over-voltage) SPRT Pin Impedance SPRT Pin Threshold Voltage Over-voltage Protection Detect (Transistor Driving Section) SW Pin Output Voltage 1 H SW Pin Output Voltage 2 H SW Pin Output Voltage 2 L SW Pin Oscillating Frequency 1 SW Pin Oscillating Frequency 2 VSW1H VSW2H VSW2L fSW1 fSW2 BATT=CT=1.5V, IO=-2mA, VSYS1=VSYS2=0V, at start CT=0V, IO=-10mA, EI=0.7V, SPRT=0V CT=2V, IO=10mA CT=470pF, VSYS1=VSYS2=0, at start CT=470pF, CLK=0V 65 60 0.78 1 0.98 1.5 0.3 80 70 0.45 95 82 1.13 V V V kHz kHz VSPR ISPR1 ISPR2 ISPR3 RSPR VSPTH VHVPR EI=0.7, CT=0V BSEN Pin Voltage, pin 7=1.3V, pin 12=3.2V EI=1.3V EI=0.7V EI=1.3V, OFF=0V EI=1.3V, BATT=9.5V 6 12 12 175 1.1 8 0 10 20 20 220 1.2 8.6 0.1 16 32 32 265 1.3 9 V µA µA µA kΩ V V VSITH VEOH VEOL EI=0.7V, IO=-80µA EI=1.3V, IO=80µA 3.05 1.4 3.2 1.6 0.3 3.35 V V V IPSW VSHIF IHLK GPWM 7.9 0.25 13 0.45 0 1/60 1/50 17.5 0.55 11 1/40 mA V µA 1/kΩ Mar. 2007 Rev. 1. 3 9 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Electrical Characteristics (Continued) Parameter SW Pin Oscillating Frequency 3 SW Pin Minimum Pulse Width Pulse Duty at Start Max Pulse Duty at Self-Running Max Pulse Duty at CLK Synchronization (Dead Time Section) DEAD Pin Impedance DEAD Pin Output Voltage (Interface Section) OFF Pin Threshold Voltage OFF Pin Bias Current START Pin ON Threshold Voltage START Pin OFF Threshold Voltage START Pin Bias Current CLK Pin Threshold Voltage H CLK Pin Threshold Voltage L CLK Pin Bias Current (Started Circuit Section) Starter Switching Voltage Starter Switching Hysteresis Width Discharge Release Voltage (Empty Detection Section) Empty Detection Voltage 1 Empty Detection Voltage 2 Empty Detection Hysteresis Width1 Empty Detection Hysteresis Width2 EMP Pin Output Voltage EMP Pin Output Leak Current BSEN Pin Input Resistance VEMPT1 VEMPT2 VEMHS1 VEMHS2 VEMP IEMPL RBSEN VSEL=0V ISEL=-2µΑ VSEL=0V ISEL=-2µΑ IO=1mA, BSEN=1V BSEN=2.4V VSEL=0V 17 23 2.1 1.7 8 8 2.2 1.8 50 50 2.35 1.945 100 100 0.5 1 27 V V mV mV V µA kΩ VSTMM VSNHS VDIS VSYS1=VSYS2=0V to 3.2V START=0V START=0V 2.3 18 1.63 2.5 200 1.83 2.7 300 2.03 V mV V VOFTH IOFF VSTATH1 VSTATH2 ISTART VCLKTHH VCLKTHL ICLK CLK=3.2V EI=1.3V OFF=0V VSYS1=VSYS2=0V, CT=2V VSYS1=VSYS2=0V, CT=2V START=0V BATT -0.3 10 2 0.8 10 16 19 75 95 VSYS1 -2 115 BATT -1 V µA V V µA V V µA RDEAD VDEAD 20 0.78 25 0.88 30 0.98 kΩ V Symbol fSW3 TSWMIN DSW1 DSW2 DSW3 CT=470pF CT=470pF, EO=0.5~0.7V Sweep CT=470pF, VSYS1=VSYS2=0V EI=0.7V, CT=470pF, CLK=0V, SPRT=1.1V, START not connected EI=0.7V, CT=470pF, SPRT=1.1V, START not connected 0.01 40 70 65 50 80 75 Conditions Min Typ 88.2 0.6 60 90 85 Max Unit kHz µs % % % AM5901A Mar. 2007 Rev. 1. 3 10 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Electrical Characteristics (Continued) Parameter BSEN Pin Leak Current SEL Pin Detection Voltage SEL Pin Detection Current (Reset Section) VSYS1 Reset Threshold Voltage Ratio RESET Detection Hysteresis Width RESET Pin Output Voltage RESET Pin Pull-up Resistance AMUTE Pin Output Voltage 1 AMUTE Pin Output Voltage 2 AMUTE Pin Pull Down Resistance (Operational Amplifier Section) Input Bias Current Input Offset Voltage High Level Output Voltage Low Level Output Voltage Output Driver Current (Source) Output Driver Current (Sink) Open Loop Voltage GAIN Slew Rate (Charging Circuit Section) SEL Pin Charging Current RCHG Pin Bias Voltage RCHG Pin Output Resistance SEL Pin Leak Current 1 SEL Pin Leak Current 2 SEL Pin Saturation Voltage ISEL VRCHG RRCHG ISELLK1 ISELLK2 VSELCG CHGVCC=4.5V, RCHG=1.8kΩ, VSEL=4.5V CHGVCC=4.5V, RCHG=1.8kΩ CHGVCC=4.5V, RCHG=0.5 and 0.6V CHGVCC=4.5V, RCHG=OPEN BATT=4.5V CHGVCC=0.6V, RCHG=1.8kΩ BATT=4.5V CHGVCC=4.5V, IO=300mA, RCHG=0Ω 0.45 80 0.745 0.75 150 0.81 0.95 250 0.960 1.2 1.2 1.2 1 mA V kΩ µA µA V IBIAS VIOOP VOHOP VOLOP ISOU ISIN GVO SR RL=OPEN RL=OPEN Output shorted to GND By 50Ω Output shorted to VSYS By 50 Ω VIN=-75dBV, f=1kHz 0.3 -6.5 0.7 70 0.5 OP+=1.6V -5.5 2.8 0.2 -3 2.2 0 300 5.5 nA mV V V mA mA dB V/µs HSRT VRSTHS VRST RRST VAMTI VAMT2 RAMT IO=-1mA, VSYS1=VSYS2=2.8V IO=1mA, VSYS1=VSYS2=2.8V 72 BATT -0.4 BATT -0.4 77 95 90 Ratio of VSYS1 voltage and erroramp threshold voltage 82.98 10 90 50 97.2 100 0.5 108 BATT BATT 113 % mV V kΩ V V kΩ Symbol IBSNL VSELTH ISELT Conditions VSYS1=VSYS2=0V, BSEN=4.5V VSELTH=BATT-SEL, BSEN=2V 1.35 -15 Min Typ Max 1 Unit µA V µA AM5901A ΙO=−1mA, START=0V, VSYS1=VSYS2=0V Mar. 2007 Rev. 1. 3 11 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Typical Performance Characteristics AM5901A 3 3 Output Voltage (CH1,3,4): VO (V) 2 2 1 Output Voltage (CH2): VO (V) 1 0 -1 RL=Infinite RL=20Ω RL=8Ω RL=4Ω 0 -1 RL=Infinite RL=20Ω RL=8Ω RL=4Ω -2 -2 -3 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 -3 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 Input Voltage: VIN (V) Input Voltage: VIN (V) Figure 5. Input Load Fluctuation (CH1, 3, 4, Note 3) Figure 6. Input Load Fluctuation (CH2, Note 3)) 1.8 3.5 1.6 EO, DEAD Output Voltage (V) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 RESET Output Voltage (V) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 EO Pin DEAD Pin 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VSYS1 (V) VSYS1 (V) Figure 7. Error Amplifier Output Voltage Figure 8. RESET Pin Voltage Note 3: Input voltage herein is referenced to Bias pin voltage. Mar. 2007 Rev. 1. 3 12 BCD Semiconductor Manufacturing Limited To System Micro Controller CLK 0.1µ To System Micro Controller AMUTE BRAKE 1 MUTE 2 MUTE 34 M M TRAVERSE FOCUS 0.1µ TRACKING SPINDLER Typical Application Mar. 2007 Rev. 1. 3 EMP 1.8k 33 32 31 30 29 28 27 26 25 24 23 34 22 PLAY OFF IN1 33µH 47µ / 6V 0.1µ 36 20 35 21 IN2 2SA1585 47 1N5817 38 18 Servo Processor 37 19 IN4 39 Play 40 16 17 IN3 AM5901A 15 14 13 VREF 41 BU34381 (or BU34581) W1 (Pin 44) 42 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Figure 9. Typical Application 1 of AM5901A in Portable CD/VCD Player 43 13 44 100k 10P 12 1 2200p 0.1µ 22k 1µ 2 3 4 5 6 7 8 9 10 11 470p 680k/ NC 3.3n RESET 47p 0.1µ 0.1µ 100 2SC4115 or 2SD2150 1k 1000p VOUT 10 0.1µ 220µ/10V 220µ/ 10V 2SC4115 or 2SD2150 1mH AM5901A BCD Semiconductor Manufacturing Limited Data Sheet Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Application Information H-Bridge Driver 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). 2. VREF Drop Mute When the voltage impressed to VREF terminal is 1.0V (Typ.) or less, impedance of driver output becomes "high". 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. 4. Driver Gain Driver input resistance is 11kΩ (CH1, CH3, CH4) and 7.5kΩ (CH2). Driver gain can be calculated by the expression. CH1,3,4 CH2 GV=20 log |55k/(R+11k)| GV=20 log | 110k/(R+7.5k)| DC/DC Converter Control Circuit 1. Output Voltage Booster circuit of voltage (VSYS1) can be configured with external component. The voltage is defined as follows. AM5901A VSYS1 12 R1 EI 7 R2 R4 1.245V R3 R1*R3 R2*R4 + (R2+R4) (R1+R3) VSYS1 = 1.245 * R2*R4 (R2+R4) (V) R1 = External Resistance R2 = External Resistance R3 = 35kΩ R4 = 21kΩ 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: t=CSPRT * VTH/ISPRT (sec) (VTH=1.245V, ISPRT=10µA) 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. Mar. 2007 Rev. 1. 3 14 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER 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. t = CDEAD * R (sec) (R=65kΩ) 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: t = CSPRT * VTH/IOFF (sec) (VTH = 1.245V, IHV = 20µA) 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: t = CSPRT * VTH/IHV (sec) (VTH = 1.245V, IHV = 20µA) 0.1 µ F AM5901A HVcc 36 + 47 µ F 33 µ H SBD PSW 37 47 Ω PWMFIL 44 100k 10pF 2200pF "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: SEL Pin Detecting Voltage 2.2V (Typ.) 1.8V (Typ.) Return Voltage 2.25V (Typ.) 1.85V (Typ.) 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. L High-Z Mar. 2007 Rev. 1. 3 15 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER 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. Charging Circuit The power supply of the charging unit is from CHGVCC terminal and it is independent of any 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. AM5901A Mar. 2007 Rev. 1. 3 16 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Mechanical Dimensions LQFP-44 Unit: mm(inch) AM5901A 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 17 BCD Semiconductor Manufacturing Limited Data Sheet 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER Mechanical Dimensions (Continued) PQFP-44 Unit: mm(inch) AM5901A 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 18 BCD Semiconductor Manufacturing Limited 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 - 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 BCD Semiconductor Manufacturing Limited - 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