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| 型号： | A4931MET-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 8/9页 |
| 文件大小： | 0K |
| 描述： | IC DC MOTOR PREDRIVER 3PH 28QFN |
| 标准包装： | 73 |
| 应用： | DC 电机驱动器，无刷（BLDC），3 相 |
| 输出数： | 1 |
| 电源电压： | 8 V ~ 33 V |
| 工作温度： | -20°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-VFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN/MLP 裸露焊盘（5x5） |
| 包装： | 托盘 |
A4931
3-Phase Brushless DC Motor Pre-Driver
by holding ENB high for longer than 3 ms. Note that Brake mode
overrides Standby mode, so hold the BRAKEZ pin high in order
to enter Standby mode.
Charge Pump The internal charge pump is used to generate a
supply above V BB to drive the high-side MOSFETs. The volt-
age on the VCP pin is internally monitored, and in case of a fault
condition, the outputs of the device are disabled.
Fault Shutdown In the event of a fault due to excessive
junction temperature or due to low voltage on VCP or VBB,
the outputs of the device are disabled until the fault condition is
removed. At power-up the UVLO circuit disables the drivers.
Overvoltage Protection VBB is monitored to determine if
a hazardous voltage is present due to the motor generator pump-
ing up the supply bus. When the voltage exceeds V BBOV , the
synchronous rectification feature is disabled.
Overtemperature Protection If die temperature exceeds
approximately 170°C, the Thermal Shutdown function will dis-
able the outputs until the internal temperature falls below the
15°C hysteresis.
Hall State Reporting The FG1 pin is an open drain output
that changes state at each transition of an external Hall element.
The FG2 pin is an open drain output that changes state at each
HAx transition.
Lock Detect Function The IC will evaluate a locked rotor
condition under either of these two different conditions:
? The FG1 signal is not consistently changing.
? The proper commutation sequence is not being followed. The
motor can be locked in a condition in which it toggles between
two specific Hall device states.
Both of these fault conditions are allowed to persist for period
of time, t lock . t lock is set by capacitor connected to CLD pin. C LD
produces a triangle waveform (1.67 V peak-to-peak) with fre-
quency linearly related to the capacitor value. t lock is defined as
127 cycles of this triangle waveform, or:
t lock = C LD × 20 s/ μ F
After the wait time, t lock , has expired, the outputs are disabled,
and the fault is latched. These fault conditions can only be cleared
by any one of the following actions:
? Rising or falling edge on the DIR pin
? VBB UVLO threshold exceeded (during power-up cycle)
? ENB pin held high for > t lock / 2
The Lock Detect function can be disabled by connecting CLD to
GND.
When the A4931 is in Brake mode, the Lock Detect counter is
disabled.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A4931METTR-T | 功能描述:IC DC MOTOR PREDRIVER 3PH 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
| A4931METTR-T | 制造商:Allegro MicroSystems 功能描述:IC MOTOR PRE-DRIVER FULL BRIDGE QFN28 |
| A49323-000 | 制造商:TE Connectivity 功能描述:CTC-0015-22-9/5-9CS3182 - Cable Rools/Shrink Tubing 制造商:TE Connectivity 功能描述:Thermocouple Extension Cable 2Conductors 22AWG 3.6mm |
| A4933 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A4933 is a 3-phase controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications. |
| A4933KJPTR-T | 功能描述:IC PREDRIVER MOSFET 3PH 48LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:5 系列:- 配置:低端 输入类型:非反相 延迟时间:600ns 电流 - 峰:12A 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:- 电源电压:14.2 V ~ 15.8 V 工作温度:-20°C ~ 60°C 安装类型:通孔 封装/外壳:21-SIP 模块 供应商设备封装:模块 包装:散装 配用:BG2A-NF-ND - KIT DEV BOARD FOR IGBT 其它名称:835-1063 |
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