Weltrend | Products

BLDC motor drivers and controllers

WT51FG24

The WT51FG24 is a 48V three-phase sensorless smart motor controller for BLDC motor applications such as fans or pumps. With integrated step-down voltage converter (buck and LDO), it can directly drive 48V, 54V, and up to 72V BLDC motors. Sensorless (BEMF) technology is used to simplify motor system design, reduce cost, and increase reliability. The smart motor controller combines the sinusoidal (SVM) and 150° square driving capability to optimize the power efficiency, noise performance, startup, and forward/reverse windmill condition. I2C interface with read-out protected embedded memory can perform smart fan applications between motor system and host device. Built-in NN-type gate driver with configurable driving current (ISET) is used to perfectly match the external MOSFETs with fewer system components. The WT51FG24 is available in green package QFN24 4 x 4, which is suitable for small form factor BLDC motor system design requirement.

Features

- 1T 8052 core, MCS-51 instruction set compatible
- Instruction execution time: Min. = 41.67ns @24MHz
- 512 Bytes of RAM
- 16K Bytes of flash memory for program storage
- Supporting Internal Clock Oscillators: 48MHz and 32KHz RC oscillator
- Dual 16-bit Data Pointers (DPTR0 & DPTR1)
- Three 16-bit Timer/Counters (Timer0, Timer1, Timer2)
- One PWMIN Duty Capture 16-bit Timer/Counters
- One Hall/BEMF Capture 16-bit Timer/Counters
- Built-in Gate Driver Unit and SVM Function
- Built-in Buck Circuit
- Built-in Sensorless BEMF Detection Circuit
- Built-in Over Current Detection Circuit
- Built-in 16*16 Hardware Multiplier & Right shift 16-bits
- One Watchdog Timer (WDT)
- One Watch Timer
- One UART (UART0), supports baud rate 2400bps ~ 460800bps (at 24MHz)
- Emulated E2PROM
- One master/slave I2C interface
- Multi-channel 10-bit Analog/Digital Converter (ADC0 ~ ADC9)
- External Interrupt IRQ pins (IRQ0 ~ IRQ3)
- Programmable bi-directional I/O pins
- Under voltage lock out (UVLO)
- On-chip Power On Reset (POR) and Low Voltage Reset (LVR)
- Built-in In-Circuit Emulator (ICE) and In-System Program (ISP)
- Read Out Protection
- Operating voltage range: 7V ~ 80V
- Operating temperature: - 40℃ ~ +105℃
- Green Package: QFN-24 (4mmx4mmx0.85mm)

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