MP6505DM-LF

MP6505 4.5V-to-16V,400mA, Single-Phase Brushless-DC–Motor Driver DESCRIPTION FEATURES The MP6505 is a single-phase brushless-DC– motor driver, with an input voltage range of 4.5V to 16V and a maximum output current of 400mA. The MP6505 controls the rotational speed through either the input voltage or the PWM signal. Other features include minimumrotational–speed set, a rotational speed indicator, built-in input over-voltage protection, built-in locked-rotor protection, locked-rotor–state indicator, thermal shutdown, and a 1.2V integrated Hall bias voltage. The MP6505 is available in 5.0mm×6.4mm TSSOP16 package.  Operating Voltage of 4.5V to 16V  Integrated Power MOSFETs (HS: 370mΩ; LS: 230mΩ)  Maximum Output Current 400mA  Low Quiescent Current (Not including Hall Sensor) of 1.4mA  Speed Control by Input Voltage or PWM Signal  Programmable Minimum Speed  Rotational-Speed Indicator  Locked-Rotor Indicator  Locked-Rotor Protection and Automatic Recovery  Thermal Protection and Automatic Recovery  Built-In Input OVP and Automatic Recovery  Hall Bias Voltage(1.2V) Integrated  Available in TSSOP16 (5.0×6.4mm) Package APPLICATIONS  CPU Fan for Personal Computers or Servers  Brushless DC Motor Driver All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Motor VIN P-GND P-GND P-GND S-GND OUT1 OUT2 VCC S-GND D1 R1 GND C IN CT RMI R3 R2 VTH R4 CT=0.47µF to 1µF MP6505 VREF COSC IN- FG HB RD IN+ CP=100pF V IN R5 Hall R6 MP6505 Rev. 1.02 1/16/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 1 MP6505-SINGLE-PHASE, BRUSHLESS-DC–MOTOR DRIVER ORDERING INFORMATION Part Number MP6505DM* Package TSSOP16(5.0×6.4mm) Top Marking MP6505 * For Tape & Reel, add suffix –Z (eg. MP6505DM–Z); For RoHS compliant packaging, add suffix –LF (e.g. MP6505DM–LF–Z) PACKAGE REFERENCE TOP VIEW P-GND 1 16 P-GND OUT1 2 15 OUT2 VCC 3 14 S-GND RMI 4 13 CT VTH 5 12 VREF COSC 6 11 IN- FG 7 10 HB RD 8 9 IN+ MP6505 TSSOP16 ABSOLUTE MAXIMUM RATINGS(1) VCC ...................................................... 0V to 20V OUT1, OUT2 ...................................... -1V to 20V FG, RD ............................................ -0.3V to 18V All other Pins .................................. -0.3V to 6.5V (2) Continuous Power Dissipation (TA = 25°C) TSSOP16 ................................................. 1.17W Junction Temperature ...............................150°C Storage Temperature ............... -55°C to +150°C Recommended Operating Conditions (3) VCC ................................................... 4.5V to 16V VTH ....................................................... 0V to 6V IN+, IN- .............................................. 0.2V to 3V Operating Junction Temp. (TJ). -40°C to +125°C MP6505 Rev. 1.02 1/16/2018 Thermal Resistance (4) θJA θJC TSSOP16 (5.0×6.4mm) .......... 90 ...... 30 ... °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions.(For Vcc voltage range, it doesn’t include the external input diode voltage drop) 4) Measured on JESD51-7, 4-layer PCB. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 2 MP6505-SINGLE-PHASE, BRUSHLESS-DC–MOTOR DRIVER ELECTRICAL CHARACTERICS TA=25°C, VCC=12V, unless otherwise noted. Parameter Circuit Current in Locked-Rotor Protection Mode Reference Voltage HB Voltage COSC HIGH Voltage COSC LOW Voltage COSC Oscillator Frequency CT Pin HIGH Voltage CT Pin LOW Voltage ICT Charge Current ICT Discharge Current ICT Charge/Discharge Ratio High-Side Switch-On Resistance Symbol Low-Side Switch-On Resistance RDS2 Current Limit Gain Current Limit VREF VHB VCOSC_H VCOSC_L fCOSC VCTH VCTL ICT1 ICT2 rCT RDS1 Min Typ Max Unit VCC=20V 1.0 1.4 2 mA IVREF=5mA IHB=5mA 5.6 1.1 3.45 1.8 26.4 3.4 1.63 1.1 0.08 7 6.2 1.2 3.75 2.1 35.6 3.86 1.83 2.85 0.25 18 420 V V V V kHz V V μA μA VCC=12V TA=25°C 5.9 1.15 3.6 1.95 31 3.63 1.73 1.95 0.16 12 370 VCC=12V TA=25°C 230 260 mΩ CP=100pF GC IPEAK Under-Voltage Lockout Threshold— Rising Under-Voltage Lockout Threshold— Hysteresis RD/FG Output Pin Low-Level Voltage RD/FG Output Pin Leakage Current OVP Threshold Rising OVP Threshold Hysteresis MP6505 Rev. 1.02 1/16/2018 ICC Condition 9 A/V IN+ – IN- =±50mV 0.4 0.7 1.3 IN+ – IN- =±100mV 0.8 1 1.8 3.57 3.75 3.93 190 VRDL/FGL IRD/FG=5mA VRDL/FGL VRD/FG=12V 19 0.1 20 1.7 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. mΩ A V mV 0.35 V 1 21 μA V V 3 MP6505-SINGLE-PHASE, BRUSHLESS-DC–MOTOR DRIVER PIN FUNCTIONS Pin # (TSSOP16) Name Description 1,16 2 3 4 5 P-GND OUT1 VCC RMI VTH 6 COSC 7 FG 8 RD 9 10 11 12 IN+ HB INVREF 13 CT 14 15 S-GND OUT2 Power Ground. Motor Driver Output 1. Power Supply. Minimum Rotational Speed Set. Rotational Speed Control. Use DC voltage or PWM signal. Oscillator Setting. Connect this pin to an external capacitor to set the switch frequency. Rotational Speed Detector. Connect to an external power source through a pull-up resistor. Locked-Rotor Protection Detector. Connect to an external power source through a pull-up resistor. Hall Sensor Input+. For rotor position detection and current limit setting. Hall Sensor Bias Regulator Output. Powers the external Hall sensor. Hall Sensor Input-. For rotor position detection and current limit setting. Reference Voltage Output. Locked-Rotor Protection and Recovery Time Set. Connect to an external capacitor to set the recovery time. Ground for Control Circuit. Motor Driver Output 2. Not Connected. Connect exposed thermal pad to power ground for better thermal performance. NC MP6505 Rev. 1.02 1/16/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 4 MP6505-SINGLE-PHASE, BRUSHLESS-DC–MOTOR DRIVER TYPICAL CHARACTERISTICS VIN=12V, fCOSC=30kHz MP6505 Rev. 1.02 1/16/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 5 MP6505-SINGLE-PHASE BRUSHLESS DC MOTOR DRIVER TYPICAL PERFORMANCE CHARACTERISTICS fCOSC=30kHz, CT=1μF, VTH=0V, VIN=12V, CIN=10μF, Lmotor=5mH, Rmotor=10Ω, TA=25°C, unless otherwise noted. MP6505 Rev. 1.02 www.MonolithicPower.com 1/16/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 6 MP6505-SINGLE-PHASE BRUSHLESS DC MOTOR DRIVER BLOCK DIAGRAM FG RD Thermal Protection OCP COMP VCC Regulator Circuit HB PMOS PMOS 6V VREF Drive Circuit 1 1.2V OVP Protection Control OUT1 Circuit OUT2 Hall Signal Comparator IN+ NMOS NMOS Drive Circuit 2 IN- Current Sense Amplifier Hall Signal Amplifier Oscillator Circuit Charge /Disc harge Circuit CT S-GND VTH RMI Σ RAMP COSC P-GND Figure 1: Functional Block Diagram MP6505 Rev. 1.02 www.MonolithicPower.com 1/16/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 7 MP6505-SINGLE-PHASE BRUSHLESS DC MOTOR DRIVER FUNCTION DESCRIPTION Motor Driver The OUT1 and OUT2 pins drive the motor with a maximum continuous output current of 400mA at room temperature. The peak output current value is proportional to the Hall sensor output voltage of (VIN+–VIN-). Frequency Setting A capacitor at the COSC pin sets the frequency. For most applications, use a 100pF capacitor for a typical PWM frequency of 30kHz. Over Temperature Protection The MOSFET is shutdown when the temperature exceeds about 175oC and resumes working once the temperature is below about 155oC. Working Mode The driver has operates in one of four modes under normal conditions, as shown in Figure 2. The following describes each mode:  Minimum Speed The voltage on RMI pin sets the minimum PWM duty cycle, which sets the lowest speed. Connect to VTH if not used. Locked-Rotor Detection The RD pin is the locked-rotor detector, and is the output of an open collector. It goes low when the motor rotates and goes into high impendence if the motor is in a locked-rotor state. Leave it open if not used. Speed Detection The rotational speed detector (the FG pin) is the output of an open collector. It outputs a high or low voltage relative to the Hall comparator’s output. Higher speeds produce higher-frequency signals. Leave it open if not used. Current Limit and the Hall Signal An internal amplifier with hysteresis amplifies the differential Hall signal: The output of this amplifier serves as the current-limit value. The differential Hall voltage drops to 0V whenever an opposing magnet passes the Hall sensor to limit the peak current during commutation. The Hall sensor is directly powered by a 1.2V voltage on the HB pin. The Hall senor input sensitivity accepted by the part is down to 3mV. Input Over-Voltage Protection The reverse current generated with every commutation charges the input capacitor and causes a periodic voltage spike at the input pin. The internal input over-voltage protection (OVP) circuit turns off two HS switches when a spike exceeds 20V, and recovers from OVP when the spike is less than 18V. Minimum Speed Mode This mode runs the motor at the slowest motor speed. It uses a thermistor to provide the VTH signal and compares it against RMI to determine the slowest motor speed. At low temperatures, VTH exceeds RMI. The device compares VCOSC against RMI to generate a PWM signal, PWM-RMI, to control the motor speed. Removing the thermistor causes VTH and the motor speed to reach their respective maxima and minima.  Variable Speed Mode When the VTH signal falls below RMI, the device compares VCOSC against VTH to generate a PWM signal of PWM-VTH to control the motor speed. In general, VTH controls the PWM duty cycle, and therefore the motor speed.  Full-Speed Mode When the VTH signal is less than VCOSC(MIN), the PWM duty is 100% and the motor speed is at its maximum.  Locked-Rotor–Protection Mode An internal current source, ICT1, charges the capacitor at the CT pin; changing the Hall comparator’s output provides a reset signal to drive an internal switch to discharge this capacitor to VCTL. If the motor rotor is locked, the Hall comparator’s output will not change. Once the voltage on the capacitor goes to VCTH, the driver enters lockedrotor–protection mode and another current source, ICT2, discharges the CT capacitor. During this period, the PWM duty cycle goes to 0% and the RD pin is in a high-impedance state. When the voltage on the capacitor drops to 0V, ICT1 charges the capacitor again. The PWM signal resumes switching to try to drive motor again. If the rotor remains locked, the process repeats. MP6505 Rev. 1.02 www.MonolithicPower.com 1/16/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 8 MP6505-SINGLE-PHASE BRUSHLESS DC MOTOR DRIVER VTH Vcosc(max) 3.6V RMI Vcosc 2V Vcosc(min) Minimum speed mode Variable speed mode Locked -rotor protection mode Full speed mode FG VCTH(3.6V) CT VCTL(1.7V) RD High impedance High impedance High impedance Low level Ton Rotating Toff Lock protection mode (Toff=5Ton) Figure 2: Driver Operation Mode MP6505 Rev. 1.02 www.MonolithicPower.com 1/16/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 9 MP6505-SINGLE-PHASE BRUSHLESS DC MOTOR DRIVER APPLICATION INFORMATION Selecting the Input Capacitor The input capacitor absorbs excess armature inductor energy with every commutation. For typical applications, select CIN≥10µF to provide a margin of safety for input OVP. Motors with larger armature inductors require larger input capacitors. Design Example Below is an example design that follows the application guidelines for the given specifications: 4.5V to 16V VIN 400mA IOUT(Max) 30kHz fCOSC Setting the Frequency For most applications, use a 100pF capacitor for the CP capacitor to set the frequency to 30kHz. fCOSC is determined by: Figure 4 shows a detailed application schematic. For more applications, please refer to the related Evaluation Board Data Sheets. Motor fOSC  3  106 / CP (Hz) Connecting the Motor Figure 3 shows that the OUT1 and OUT2 connect to the motor armature: When VIN+ exceeds VIN-, SW1 and SW4 activate and current flows from OUT1 to OUT2; When VIN- exceeds VIN+, SW2 and SW3 activate and current flows from OUT2 to OUT1. The opposing current directions generate opposing polarities in the armature winding. For most applications, carefully connect OUT1 and OUT2 to the motor terminators according to the Hall sensor setting position. Incorrect connections will cause abnormal motor function. P-GND P-GND VIN D1 B130LAW-7-F CIN 10uF GND R7 0O OUT1 OUT2 VCC S-GND MP6505 VTH VTH R8 1kO CT RMI CT=1µF VREF COSC IN- FG HB RD IN+ CP=100pF VIN R 5 10kO Hall R 6 10kO Figure 4: Detailed Application Schematic V cc S W1 B rus hles s DC Motor OUT 1 S W2 OUT2 M S W3 S W4 Figure 3: Power Stage MP6505 Rev. 1.02 www.MonolithicPower.com 1/16/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 10 MP6505-SINGLE-PHASE, BRUSHLESS-DC–MOTOR DRIVER PACKAGE INFORMATION TSSOP16 (5.0X6.4mm) 0.40 TYP 4.90 5.10 16 0.65 BSC 9 1.60 TYP 4.30 4.50 PIN 1 ID 1 5.80 TYP 6.20 6.60 8 TOP VIEW RECOMMENDED LAND PATTERN 0.80 1.05 1.20 MAX SEATING PLANE 0.19 0.30 0.65 BSC 0.05 0.15 0.09 0.20 SEE DETAIL "A" FRONT VIEW SIDE VIEW NOTE: GAUGE PLANE 0.25 BSC 0o -8o 0.45 0.75 DETAIL “A” 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH , PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY(BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING CONFORMS TO JEDEC MO-153, VARIATION AB. 6) DRAWING IS NOT TO SCALE. NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP6505 Rev. 1.02 1/16/2018 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 11