CJDR4938

JSCJ
JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD. 36V Input Three-Phase Brushless DC Motor Pre-Drivers CJDR4938, CJDR4939 1 Motor Pre-Drivers Introduction The CJDR4938 and the CJDR4939 are a complete set of three-phase brushless DC motor pre-drivers. They can control the operation of three-phase brushless motor by driving 6 N-channel power MOSFETs, and can support the input of up to 36V po...
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Корпус QFN285X5
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JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD. 36V Input Three-Phase Brushless DC Motor Pre-Drivers CJDR4938, CJDR4939 1 Motor Pre-Drivers Introduction The CJDR4938 and the CJDR4939 are a complete set of three-phase brushless DC motor pre-drivers. They can control the operation of three-phase brushless motor by driving 6 N-channel power MOSFETs, and can support the input of up to 36V power supply voltage. When the device works normally, the commutation logic can be determined by three Hall elements with 120° phase difference. When the CJDR4938 and the CJDR4939 provide drive for the three-phase bridge composed of 6 MOSFETs, their output current will be determined by the ability of external MOSFETs. They are internally integrated with synchronous rectification controlled by pulse width modulation with fixed decay time to limit the possible surge current. During current attenuation, the MOSFET at the appropriate position inside will be turned on to reduce power consumption. When overvoltage occurs, synchronous rectification will be turned off to reduce power supply voltage fluctuation caused by changing current. The CJDR4938 and the CJDR4939 also have other functions, including locked-rotor protection function that can set rotor detection delay time through external capacitor, thermal shutdown protection, overvoltage protection and under-voltage locking. The logic input mode includes enable control (ENABLE), direction control (DIR), brake control (BRAKEZ) and noise control (SYN). The logic output is Hall signal and FGx pin (CJDR4938 is FG1, CJDR4939 is FG2) output signal, which can be used to detect the rotation speed. 2 Applications • • • Electric Tool and Household Appliances Mechatronic Products Pump 3 Features • • • • • • • • • • Drives 6 N-channel MOSFETs Input Voltage up to 36V Synchronous Rectification for Low Power Dissipation Internal UVLO and Thermal Shutdown Circuitry Hall Element Inputs PWM Current Limiting Dead Time Protection FG Outputs Standby Mode Lock Detect Protection Overvoltage Protection 4 Available Package • PART NUMBER CJDR4938 CJDR4939 PACKAGE QFNWB5×5-28L QFNWB5×5-28L Package Please carefully read the notice at the end of this data sheet about product use, data sheet changes and important statements. PDF
Документация на CJDR4938 

CJDR4938, CJDR4939 The data sheet of IC

Дата модификации: 18.12.2023

Размер: 687.4 Кб

18 стр.

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