- 您现在的位置：买卖IC网 > PDF目录1773 > A4934GLPTR-T (Allegro Microsystems Inc)IC BLDC DVR 3PHASE 16-ETSSOP PDF资料下载
参数资料
| 型号： | A4934GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC BLDC DVR 3PHASE 16-ETSSOP |
| 标准包装： | 1 |
| 应用： | 风扇电机驱动器，3 相 |
| 输出数： | 1 |
| 电流 - 输出： | 500mA |
| 电源电压： | 8 V ~ 16 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 其它名称： | 620-1382-6 |
A4934
the commutation delay period, a CDCOM is asserted, starting
the Blank timer. The Blank signal disables the BEMF detector so
the comparator is not active during the commutation transients.
The next zero crossing, detected on the tri-stated output, causes
FCOM to go high. This triggers the Commutation Delay timer
and the sequence repeats.
Startup
At startup, commutations are provided by an onboard oscillator.
Three-Phase Sensorless Fan Driver
? For PWM applications, input frequencies in the range
15 to 30 kHz are applied directly to the motor windings. If the
PWM duty cycle is very small, then the IC will apply a mini-
mum pulse width of typically 6 μ s. This minimum pulse width
effects the minimum speed. As a result of having a minimum
pulse width, the IC can startup and operate down to very short
duty cycles.
These commutations are part of the startup scheme, to step the
motor to generate BEMF until legitimate BEMF zero crossings
are detected and normal BEMF sensing commutation is achieved.
SLEW Input
Controls the level of soft switching:
Until an appropriate number of FCOM pulses are achieved (96),
100% PWM will be applied to the motor windings.
Standby Mode
Driving PWM low for 500 μ s causes the IC to enter a low power
SLEW Pin Connection
GND
Open
Soft Switch Status
Less
More
standby mode.
Lock Detect
Valid FCOM signals must be detected to ensure the motor is not
FC Input
This is the logic input to set force commutation time at startup, by
connection as follows:
stalled. If a valid FG is not detected for 2 s, the outputs will be
disabled for 5 s before an auto-restart is attempted.
FG Output
The FG output provides fan speed information to the system.
FG is an open drain output.
FC Pin Connection
GND
VBB
Open
Startup Commutation Time
(ms)
100
50
200
PWM Input
The duty cycle applied to the PWM pin is translated directly
to an average duty cycle applied across the motor windings
to control speed.
? For voltage controlled applications, where V BB controls the
speed, PWM can be left open circuit. PWM is internally pulled-
up to logic high level.
? PWM also can be used as a control input to start and stop the
motor.
Overcurrent Protection
If needed, a sense resistor can be installed to limit current. (See
Applications Information section for more details.) The current
limit trip point would be set by:
I OCL = 200 mV / R S .
When the trip point is reached, if the threshold voltage, V OCL , is
exceeded, the drivers will be disabled for 25 μ s.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
相关PDF资料 |
PDF描述 |
|---|---|
| A4936METTR-T | IC DC MOTOR PREDRIVER 3PH 32QFN |
| A4938EETTR-T | IC DC MOTOR PREDRIVER 3PH 28-QFN |
| A4941GLPTR-T | IC MOTOR DRIVER 3PH 16-TSSOP |
| A4950KLJTR-T | IC MOTOR DVR FULL-BRIDGE 8-SOIC |
| A4954ELPTR-T | IC PWM MOTOR DVR DUAL 16-ETSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A4935 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Automotive 3-Phase MOSFET Driver |
| A4935_12 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A4935 is a 3-phase controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications. |
| A4935_13 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Automotive 3-Phase MOSFET Driver |
| A4935KJP-T | 功能描述:IC MOSFET DRIVER 3PH AUTO 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:50 系列:- 配置:高端 输入类型:非反相 延迟时间:200ns 电流 - 峰:250mA 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:600V 电源电压:12 V ~ 20 V 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-DIP 包装:管件 其它名称:*IR2127 |
| A4935KJPTR-T | 功能描述:IC MOSFET DVR AUTO 3PH 48-LQFP 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 |
发布紧急采购，3分钟左右您将得到回复。