A89303KETSR-J

A89303 Three-Phase Sensorless Fan Driver IC FEATURES AND BENEFITS DESCRIPTION • • • • • • • • • • • • • The A89303 three-phase motor driver incorporates sensorless drive intended to drive low power automotive BLDC motors. A trapezoidal drive algorithm is implemented to minimize time to ramp up to maximum speed. AEC-Q100 qualified I2C serial port control Fast startup features Trapezoidal drive Sensorless (no Hall sensors required) Low RDS(ON) power MOSFETs FG speed output Lock detection Soft start Overcurrent protection Overvoltage protection Diagnostic outputs Small for factor automotive pump The device can be operated by PWM duty or I2C interface. The I2C serial port can be used to customize the startup and running operation via EEPROM. The A89303 is available in a 20-lead TSSOP with exposed power pad (suffix LP) and a 32-contact 5 mm × 5 mm QFN with exposed thermal pad and wettable flank (suffix ET). PACKAGES: 20-lead TSSOP with exposed thermal pad (LP package) 32-contact QFN with exposed thermal pad and wettable flank 5 mm × 5 mm × 0.90 mm (ET package) Not to scale CP2 CP1 0.22 µF/X7R Logic Supply CLK DATA OCP Vds Monitor Enable VCP 0.22 µF/X7R VBB VBB Vin 22 µF I2C serial port & EEPROM System Variables Duty In Charge Pump VCP OUTC GATE DRIVE OUTB OUTA PWM/SCL RS 6 FG/SDA Control Logic Ocl Comp LSS LSS VR FF1 CTAP OUTB OUTC OUTA Position Detect FF2 GND Figure 1: Typical Application A89303-DS MCO-0000950 August 27, 2020 A89303 Three-Phase Sensorless Fan Driver IC SPECIFICATIONS SELECTION GUIDE Part Number Operating Temperature Range (TA) (°C) Packaging Packing A89303KLPTR-T –40 to 125 20-lead TSSOP with exposed thermal pad 4000 pieces per 13-inch reel A89303KETSR-J –40 to 125 32-contact QFN with exposed thermal pad and wettable flank 6000 pieces per 13-inch reel ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Supply Voltage VBB Logic Input Voltage Range VIN PWM Logic Output VO FG, FF1, FF2 Output Current IOUT LSS VLSS Output Voltage VOUT Rating Unit 40 V –0.3 to 6 V 6 V 3.6 A DC ±0.36 V t < 200 ns ±2.5 V –1.5 to VBB + 1 V CTAP –0.6 to VBB + 0.6 V VCP VBB – 0.3 to VBB + 8 V CP1 –0.3 to VBB + 0.3 V CP2 VBB – 0.3 to VCP + 0.3 V OUTA, OUTB, OUTC Junction Temperature TJ 150 °C Storage Temperature Range Tstg –55 to 150 °C Operating Temperature Range TA –40 to 125 °C THERMAL CHARACTERISTICS Characteristic Package Thermal Resistance Symbol RθJA Value Unit 20-lead TSSOP (package LP), on 2-sided PCB 1-in.2 copper Test Conditions* 35 °C/W 32-contact QFN (package ET), on 2-sided PCB 1-in.2 copper 40 °C/W *Additional thermal information available on the Allegro website. TABLE OF CONTENTS Features and Benefits............................................................ 1 Description........................................................................... 1 Packages............................................................................. 1 Typical Application................................................................. 1 Specifications....................................................................... 2 Selection Guide................................................................. 2 Absolute Maximum Ratings................................................. 2 Recommended Operational Range...................................... 2 Thermal Characteristics...................................................... 2 Pinout Diagram and Terminal List Table................................... 3 Electrical Characteristics........................................................ 4 Functional Description........................................................... 6 Basic Operation................................................................. 6 TSD/Fault Flag with PWM High Timing................................. 9 Power On / Power Off Timing............................................ 10 Startup Sequence............................................................ 12 PWM Control................................................................... 12 EEPROM Map.................................................................... 13 Serial Port.......................................................................... 14 I2C Timing Diagrams........................................................ 14 Write Command............................................................... 15 Read Command.............................................................. 15 Programming EEPROM.................................................... 16 Application Information........................................................ 18 Pin Diagrams...................................................................... 19 Package Outline Drawings................................................... 20 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 2 A89303 Three-Phase Sensorless Fan Driver IC PINOUT DIAGRAMS AND TERMINAL LIST TABLE Terminal List Table 1 20 VCP CP2 2 19 OUTC n/c 3 18 VBB PWM/SCL 4 17 n/c n/c 5 16 LSS n/c 6 15 OUTB FF2 7 14 LSS FF1 8 13 VBB FG/SDA 9 12 GND 10 11 n/c n/c n/c n/c FF2 FF1 n/c 26 27 28 29 30 31 CP2 1 21 Charge pump capacitor CP1 2 22 Charge pump capacitor n/c 3 23 4 24 n/c 5 25, 26, 27 OUTA n/c 6 28, 29, 30 CTAP FF2 7 31 Logic output signal FF1 8 32 Logic output signal n/c – 1 9 2 n/c – 3 GND 10 4 n/c – 5 CTAP 11 6 Motor common OUTA 12 7 Motor terminal n/c – 8 VBB 13 9 CP2 n/c – 10 20 VCP LSS 14 11 CTAP 6 19 n/c OUTA 7 18 OUTC n/a 8 17 n/c 16 21 5 VBB 4 n/c 15 GND n/c CP1 14 22 LSS 3 13 n/c OUTB n/c 11 23 12 2 n/c FG/SDA LSS PWM/SCL 9 24 10 1 n/c Logic input – PWM duty or I2C clock FG/SDA n/c VBB Description ET PWM/SCL LP Package Pinouts 32 Number LP n/c PAD Name 25 CP1 ET Package Pinouts I/O – Speed output signal or I2C data Ground Input supply Low-side source connection n/c – 12 OUTB 15 13 Motor terminal LSS 16 14 Low-side source connection n/c 17 15 VBB 18 16 n/c – 17 OUTC 19 18 Input supply Motor terminal n/c – 19 VCP 20 20 Charge pump capacitor PAD – – Exposed pad for enhanced thermal dissipation Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 3 A89303 Three-Phase Sensorless Fan Driver IC ELECTRICAL CHARACTERISTICS: Valid for TJ = –40°C to 125°C and VBB = 5.5 to 40 V, unless noted otherwise Characteristics Symbol Test Conditions Min. Typ. Max. Unit Driving 5.5 – VBBOV V Operating 5.5 – 40 V GENERAL Load Supply Operating Range VBB VBB Supply Current IBB Charge Pump VCP Active mode (PWM duty < DC_ON) – 8.5 12 mA 6.5 7 7.7 V Relative to VBB, VBB = 5.5 V 4 5 – V IOUT = 1.5 A, TJ = 25°C, VBB = 12 V – 300 – mΩ IOUT = 1.5 A, TJ = 125°C, VBB = 12 V – 450 520 mΩ Source Driver, TJ = 25°C, VBB = 12 V – 150 – mΩ Relative to VBB, VBB = 8 V POWER DRIVER Total Driver On-Resistance (Sink + Source) RDS(ON) – 150 – mΩ fPWM Sink Driver, TJ = 25°C, VBB = 12 V 23.3 24.5 25.7 kHz fPWMIN 2.1 – 45 kHz Duty Cycle On Threshold DCON 9.5 10 10.5 % Duty Cycle Off Threshold DCOFF 7 7.5 8 % External PWM Delay ON tPWM_ON 494 520 546 μs External PWM Delay OFF tPWM_OFF 494 520 546 μs Motor PWM Frequency MOTOR CONTROL LOGIC PWM Input Frequency Range PROTECTION CIRCUITS VBB Undervoltage Threshold VBBUVLO VBB Undervoltage Hysteresis VBBHYS VBB Overvoltage VBB Overvoltage Hysteresis VBBOV VBB rising VBB rising VBBOVHYS 4.85 5 V 500 600 mV 29 – 31.5 V 1.5 2 2.5 V VCP UVLO VCPUVLO 3.6 3.85 4.1 V VCP UVLO Hysteresis [2] VCPUVHYS 200 – 400 mV tVCPUV – 80 400 μs tPOR_DELAY – 80 90 μs –5 0 5 % 5 – – A Charge Pump Power Up Time [2] POR Delay Time VCP rising 4.7 400 Overcurrent Threshold VOCL Overcurrent Protection IOCP Thermal Shutdown Temperature TJTSD Temperature increasing 165 175 185 °C ΔTJ Recovery = TJTSD – ΔTJ – 20 – °C Thermal Shutdown Hysteresis [1] [2] VRI = 160 mV Specified limits are tested at a single temperature and assured over temperature range by design and characterization. Ensured by design and characterization, not production tested Continued on next page... Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 4 A89303 Three-Phase Sensorless Fan Driver IC ELECTRICAL CHARACTERISTICS (continued): Valid for TJ = –40°C to 125°C and VBB = 5.5 to 40 V, unless noted otherwise Characteristics Symbol Test Conditions Min. Typ. Max. Unit –5 0