参数资料
| 型号： | ATA6823C-PHQW |
| 厂商： | Atmel |
| 文件页数： | 8/27页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DVR H-BRIDGE 32QFN |
| 标准包装： | 4,000 |
| 应用： | H 桥，PWM 电机控制器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | 100mA |
| 电压 - 负载： | 7 V ~ 21.2 V |
| 电源电压： | 7 V ~ 21.2 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（7x7） |
| 包装： | 带卷 (TR) |
| 其它名称： | ATA6823C-PHQW-ND |
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3.5
Reset and Watchdog Management
The timing basis of the watchdog is provided by the trimmed internal oscillator. Its period T OSC is adjustable via the external
resistor R WD .
The watchdog expects a triggering signal (a rising edge) from the microcontroller at the WD input within a period time window of
T WD . In order to save current consumption, the watchdog is switched off during Sleep mode.
Figure 3-3. Timing Diagram of the Watchdog Function
t re s
/RE S ET
t d
t 1
t 2
t re ss hort
t d
WD
t 1
t 2
3.5.1
Timing Sequence
For example, with an external resistor R WD = 33k Ω ±1% we get the following typical parameters of the watchdog.
T OSC = 12.32μs, t 1 = 12.1ms, t 2 = 9.61ms, T WD = 16.88ms ±10%
The times t res = 70ms and t d = 70ms are fixed values with a tolerance of 10%.
After ramp-up of the battery voltage (power-on reset), the V CC regulator is switched on. The reset output, /RESET, stays low for
the time t res (typically 70ms), then switches to high. For an initial lead time t d (typically 70ms for setups in the controller) the
watchdog waits for a rising edge on WD to start its normal window watchdog sequence. If no rising edge is detected, the
watchdog will reset the microcontroller for t res and wait t d for the rising edge on WD.
Times t 1 (close window) and t 2 (open window) form the window watchdog sequence. To avoid receiving a reset from the
watchdog, the triggering signal from the microcontroller must hit the time frame of t 2 = 9.61ms. The trigger event will restart the
watchdog sequence.
Figure 3-4. T WD versus R WD
60
50
40
3 0
20
10
0
m a x
min
typ
10
20
3 0
40
50
60
70
8 0
90
100
RWD (k Ω )
If triggering fails, /RESET will be pulled to ground for a shortened reset time of typically 2 ms. The watchdog start sequence is
similar to the power-on reset.
Atmel ATA6823C [DATASHEET]
9209E–AUTO–03/12
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ATA6823C-PHQW-1 | 功能描述:Motor Driver Power MOSFET LIN, PWM 32-QFN (7x7) 制造商:atmel 系列:- 包装:剪切带（CT） 零件状态:有效 电机类型 - 步进:- 电机类型 - AC，DC:有刷直流 功能:控制器 - 换向，方向管理 输出配置:前置驱动器 - 半桥（2） 接口:LIN，PWM 技术:功率 MOSFET 步进分辨率:- 应用:通用 电流 - 输出:- 电压 - 电源:6.5 V ~ 22.7 V 电压 - 负载:- 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:32-VQFN 裸露焊盘 供应商器件封装:32-QFN（7x7） 标准包装:1 |
| ATA6823C-PHQW-19 | 制造商:Atmel Corporation 功能描述:GATE DRIVER IC 制造商:Atmel Corporation 功能描述:GATE DRIVER IC - Tape and Reel |
| ATA6823-DK | 功能描述:电源管理IC开发工具 H-Bridge Gate Driver Board RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| ATA6823-PHQW | 功能描述:马达/运动/点火控制器和驱动器 Gate Driver IC RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| ATA6823-PHQY | 功能描述:马达/运动/点火控制器和驱动器 Gate Driver IC RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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