- 您现在的位置：买卖IC网 > PDF目录16488 > A3935KLQ (Allegro Microsystems Inc)IC CTRLR MOSFET 3PH 36-SOIC PDF资料下载
参数资料
| 型号： | A3935KLQ |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR MOSFET 3PH 36-SOIC |
| 标准包装： | 31 |
| 应用： | DC 电机驱动器，无刷（BLDC），3 相 |
| 输出数： | 1 |
| 电压 - 负载： | 7 V ~ 40 V |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 135°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-QSOP |
| 供应商设备封装： | 36-QSOP |
| 包装： | 管件 |
A3935
3-Phase Power MOSFET Controller for Automotive Applications
Functional Description
Motor Lead Protection. A fault detection circuit monitors
the voltage across the drain-to-source of the external MOSFETs.
A fault is asserted low on the output terminal, F ˉ ˉAˉ ˉUˉ ˉLˉ ˉTˉ , if the
drain-to-source voltage of any MOSFET that is instructed to
turn on is greater than the voltage applied to the V DSTH input
terminal. When a high-side switch is turned on, the voltage from
V DRAIN to the appropriate motor phase output, V SX , is examined.
If the motor lead is shorted to ground before the high-side is
turned on, the measured voltage will exceed the threshold and
the F ˉ ˉAˉ ˉUˉ ˉLˉ ˉTˉ terminal will go low. Similarly, when a low-side
MOSFET is turned on, the differential voltage between the motor
phase (drain) and the LSS terminal (source) is monitored. V DSTH
is set by a resistor divider to V DD .
The V DRAIN is intended to be a Kelvin connection for the
high-side, drain-to-source monitor circuit. Voltage drops across
the power bus are eliminated by connecting an isolated PCB trace
from the V DRAIN terminal to the drain of the MOSFET bridge.
This allows improved accuracy in setting the V DSTH threshold
voltage. The low-side, drain-to-source monitor uses the LSS
terminal, rather than V DRAIN , for comparison with V DSTH .
The A3935 just reports these motor faults.
Fault Outputs. Transient faults on any of the fault outputs
are to be expected during switching, and will not disable the
gate drive outputs. External circuitry or controller logic must
determine if the faults represent a hazardous condition.
ˉ Fˉ ˉAˉ ˉUˉ ˉLˉ ˉTˉ. This terminal will go active low when any of the follow-
ing conditions occur:
V BAT(ov) = ( A BAT(ov) × V SET(ov) ) + V BAT(ov)(0) ,
where A BAT(ov) is the gain (12) and V BAT(ov)(0) is the value of
V BAT(ov) when V SET(ov) = 0 (V BAT(ov) ≈ 22.4). For the above
formula to be valid, all variables must be in range and below the
maximum operating specification.
UVFLT. Asserts high when a V BAT undervoltage fault occurs and
resets low after exceeding a recovery hysteresis. It has a high-
impedance state when a thermal shut down or V DD undervoltage
occurs. OVFLT and UVFLT are mutually exclusive by definition.
Current Sensing. A current-sense amplifier is provided to
allow system monitoring of the load current. The differential
amplifier inputs are intended to be Kelvin-connected across a
low-value sense resistor or current shunt. The output voltage is
represented by:
V CSOUT = ( I LOAD × A V × R SENSE ) + V OS
where V OS is the output voltage calibrated at zero load current
and A V is the differential amplifier gain of about 19.2. If either
the CSP or CSN pin is open, the CSOUT pin will go to its
maximum positive level.
Shut Down. If a fault occurs because of excessive junction
temperature or undervoltage on V DD or V BAT , all gate driver
outputs are driven low until the fault condition is removed. In
addition, the boost supply switch and VREG are turned off until
? V BAT overvoltage
? V BAT undervoltage
? V REG undervoltage
? Motor lead short-to-ground
? Motor lead short-to-supply
or short-to-battery
? Bridge (or V DRAIN ) open
? V DD undervoltage
? Thermal shut down
those undervoltages and junction temperatures recover.
Boost Supply. V BOOST is controlled by an inner current-
control loop, and by an outer voltage-feedback loop. The
current-control loop turns off the boost switch for 5 μ s whenever
the voltage across the boost current-sense resistor exceeds
500 mV. A diode reverse-recovery current flows through the
OVFLT. Asserts high when a V BAT overvoltage fault occurs and
resets low after a recovery hysteresis. It has a high-impedance
state when a thermal shutdown or V DD undervoltage occurs. The
voltage at the OVSET terminal, V OVSET , controls the V BAT over-
voltage set point V BAT(ov) , as follows:
sense resistor whenever the boost switch turns on, which could
result in turning off the switch again if not for the blanking-time
circuit. Adjustment of this external sense resistor determines the
maximum current in the inductor. Whenever V BOOST exceeds the
predefined threshold, 16 V nominal the boost switch is inhibited.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
9
相关PDF资料 |
PDF描述 |
|---|---|
| 9-6278027-9 | CA 62.5/125 ZIP ST MT-RJ 0.5M |
| GBM36DRUH | CONN EDGECARD 72POS DIP .156 SLD |
| VI-24N-EX | CONVERTER MOD DC/DC 18.5V 75W |
| GBM28DRTI | CONN EDGECARD 56POS DIP .156 SLD |
| XR16M570IL32-0B-EB | EVAL BOARD FOR XR16M570-B 32QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A3935KLQ-01 | 制造商:Allegro MicroSystems LLC 功能描述: |
| A3935KLQ-T | 功能描述:IC CTRLR MOSFET 3PH 36-SOIC 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:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3935KLQTR | 功能描述:IC CTRLR MOSFET 3PH 36-SOIC RoHS:否 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:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3935KLQTR-T | 功能描述:IC CTLR MOSFET 3PH AUTO 36-SOIC 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:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3936-0000T | 制造商:3M 制造商全称:3M Electronics 功能描述:100 x 100, PCB Two Row |
发布紧急采购，3分钟左右您将得到回复。