FT3107TA

FT3107T ` Three Phase Sensorless BLDC Motor Controller Description Feature The FT3107T is a Three Phase sensorless BLDC Motor controller. It provides several drive modes (BLDC, Pseudo-BLDC, Pseudo-SINE, Narrow BLDC) with constant/variable lead angle intended for a wide range of motor characteristics. Open/Closed loop speed adjustment can be achieved through either direct-PWM or analog voltage or frequency control, initiated by soft-start. Speed indicator is provided through a Frequency Generator output, generating digital pulse with a configurable frequency proportional to the speed of the motor. Protection functions of FT3107T are comprehensive including lock protection and automatic recovery, thermal shutdown and current limit protections. These prevent the control circuits and the motor from being damaged, particularly under stressed applications and demanding environments. ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ Sensorless BLDC/Pseudo-BLDC /PseudoSINE/Narrow BLDC drives Two speed adjustment methods can be selected (direct-PWM and analog voltage control) Intelligent Soft-start Constant/Variable lead angle control Open/Closed loop speed adjustment can be selected (direct-PWM and analog voltage control). FG (Frequency Generator) output Current limit protection Built-in lock protection and automatic recovery circuit Built-in thermal shutdown protection (TSD) Block Diagram VDD5 VREG10 VCC FG VSS LDO FR BRAKE SPEED/PWM ADC xa Control Engine TM High Side Driver UH VH WH Low Side Driver UL VL WL ILIMIT ISENSE TSD UVLO ADC Lock Protection BEMF EMF_U EMF_V EMF_W www.fortiortech.com FT3107T ` Pin Assignment VSS VDD5 TM BRAKE SPEED/PWM FR ILIMIT FG EMFW EMFV 1 2 3 4 5 6 7 8 9 10 FT 3107 20 19 18 17 16 15 14 13 12 11 VCC VREG10 UH VH WH UL VL WL ISENSE EMFU Pin Configuration PIN NO. PIN Name Type Description 1 VSS GND Signal and power ground. 2 VDD5 O Digital power output, LDO DC5V output for digital signal. 3 TM I TEST PIN， Floating or connect to VDD5 4 BRAKE I Brake signal input, Low: Brake. Internal pull-up. 5 SPEED/PWM I Speed control input 6 FR I Motor rotation direction input 7 ILIMIT I Current limit analog input 8 FG O Open drain. Frequency Generator, speed signal output. 9 EMF_W I Phase W back EMF. 10 EMF_V I Phase V back EMF. 11 EMF_U I Phase U back EMF. 12 ISENSE I Current limit & Lead angle analog input 13 WL O Low side phase W NMOS driver 14 VL O Low side phase V NMOS driver 15 UL O Low side phase U NMOS driver 16 WH O High side phase W PMOS driver 17 VH O High side phase V PMOS driver 18 UH O High side phase U PMOS driver 19 VREG10 O LDO output 20 VCC POWER Power supply REV 1.1 2 www.fortiortech.com FT3107T ` Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may be damaged or may not function or be operational above these ratings and stressing the device to/above these levels is not recommended. Fortior does not recommend exceeding or designing about the Absolute Maximum Ratings. Parameter Symbol Condition Ratings Unit Power supply voltage Vccmax 30.0 V FG output current IFGmax 10 mA VFG max 5.5 V Operating temperature Topr -40~+125 ℃ Storage temperature Tstg -65~+150 ℃ 100 ℃/W FG output pin withstand voltage Package Thermal Resistance， Ambient Junction to Rθja 4-layer PCB based on JEDEC standard Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Symbol Power supply voltage REV 1.1 Parameter Min. Typ. Max. Unit Vcc 3.7 12 28 V 3 www.fortiortech.com FT3107T ` Electrical Characteristics Unless otherwise specified, Ta=25℃，VCC=12V Parameter Power supply current Symbol Ratings Condition Icc Min. Unit Typ. Max. 8 15 mA 5 5.1 V 10 mA 10.5 V 10 mA 0 5.3 V Working VDD5 LDO Regulator voltage VDD5 Regulator output current Iv5out 4.9 VDD5=5V 10V Regulator Block Regulator voltage Vreg10 Regulator output current Iv10out 9.5 10.0 Vreg10=10V Analog I/O Section*Note1 Analog Input range Digital Input Section*Note2 High-level input voltage Vdinh 2.5 5.3 V Low-level input voltage Vdinl 0 2 V Internal pull up resistor Rdio 50k 150k ohm Fpwm 1 60 kHz 100k SPEED – PWM DIGITAL MODE PWM input frequency HP(High Side PMOS Driver) *Note3 Output high voltage Output low voltage HVoh Sink current = 20mA HVol Source 20mA current = 11.2 11.5 12 V - 3 5 V Source Current Io+ - 150 - mA Sink Current Io- - 90 - mA 8.5 10 11 V - 0 0.3 V LN(Low Side NMOS Driver) *Note4 Output high voltage Output low voltage LVoh Sink current = 20mA LVol Source 20mA current = Source Current Io+ - 150 - mA Sink Current Io- - 180 - mA - 0.1 0.2 V FG Output Pin FG output pin low-level voltage VFG When Io=5mA TSD Design target 150 ℃ △TSD Design target 30 ℃ Thermal Protection Circuit Thermal protection circuit operating temperature Temperature hysteresis width 1. Note1: SPEED、ILIMIT、EMF_U、EMF_V、EMF_W、ISENSE. 2. Note2: BRAKE、PWM、FR. 3. Note3: UH、VH、WH 4. Note4: UL、VL、WL REV 1.1 4 www.fortiortech.com FT3107T ` Functional Description and Notes Please read the following notes before designing driver circuits with FT3107T. 1. Power Up Sequence Upon powering up of IC, VCC needs to rise to 3V and above within 30ms; Any IO input control sequence must not be connected before VCC is stable. VCC 3V VSS Tpower_up