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参数资料
| 型号： | MC34921AER2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 21/36页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR PWM DC DUAL 64LQFP |
| 标准包装： | 1,500 |
| 应用： | DC 电机驱动器，步进电机驱动器，H 桥式 |
| 输出数： | 2 |
| 电流 - 输出： | ±4.5A |
| 电压 - 负载： | 0 V ~ 38 V |
| 电源电压： | 4.8 V ~ 5.2 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP 裸露焊盘 |
| 供应商设备封装： | 64-LQFP EP（10x10） |
| 包装： | 带卷 (TR) |
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FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
3.3 V Regulator
Switching
5.0 V Regulator
Switching and
Linear
V Core
Linear Regulator
DC Motor
Drivers
Step
Motor Driver
Charge
Pump
Supervisory
RST Function
A/D
Convertor
Timing
Logic
Figure 7. Internal Block Diagram
5.0 V AND 3.3 V REGULATORS
The 34921 5.0 V regulators have two operating modes—
switching and linear—that share a dedicated input terminal,
34921
5 V SUPPLY
B+
as illustrated in Figure 8 and Figure 9 . The 5.0 V switching
regulator operates off B+ directly. The 5.0 V linear regulator
is only used when B+ < 20 V, and the dedicated input
terminal is connected to B+ through an external power
resistor to dissipate some power off-chip. The regulator that
is used depends on the power requirement and B+ NOM of the
application. The designer is able to trade off power versus
overall system cost for each particular application. The linear
regulator mode is a low-current mode and has much less
5V
5V SWITCH
5V SELECT
R
external component cost.
34921
B +
R=
B+ - 9.0 V
I OUT
5 V SUPPLY
5V
5V SWITCH
5V SELECT
Figure 8. 5.0 V Switching Regulator Mode
Figure 9. 5.0 V Linear Regulator Mode
The 5V SELECT terminal must be tied to ground for
switching regulator mode. An internal pull-up is incorporated
in the 34921 sufficient to avoid any problems owing to
switching noise on this terminal.
The 5.0 V switching and linear regulators may supply
external logic components of the overall assembly,
depending on the application. For the 5.0 V linear regulator,
an external capacitor on the output should be used for
filtering.
5.0 V AND 3.3 V SWITCHING REGULATORS
The 5.0 V and 3.3 V switching regulators are implemented
as constant ripple buck regulators. These regulators operate
in both discontinuous and continuous mode. The clock
source is the on-board 200 kHz master oscillator. The actual
frequency of the switch terminal can vary owing to cycle
skipping. The switch MOSFET is internal to the 34921 IC, but
the remaining components—recovery diode, inductor, and
output capacitor—must be externally supplied. The input
voltage to the regulators is B+, and the regulators perform
within specifications over the range of I 5.0 ≤ 0.6 A for the
5.0 V switching regulator and I 3.3 ≤ 2.5 A for the 3.3 V
switching regulator. Each has cycle-by-cycle current limiting.
34921
Analog Integrated Circuit Device Data
Freescale Semiconductor
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34923 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL 3WAY 制造商:SPC Multicomp 功能描述:HEADER, VERTICAL, 3WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONNECTOR, RCPT, 3POS, 4.2MM; Series:2266(5566)RA; Pitch Spacing:4.2mm; Contact Termination:Through Hole Vertical; No. of Contacts:3; No. of Rows:1; Connector Mounting:PCB; Gender:Receptacle; Contact Material:Brass ;RoHS Compliant: Yes |
| MC34923DW | 功能描述:马达/运动/点火控制器和驱动器 Motor Driver 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 |
| MC34923EG | 功能描述:马达/运动/点火控制器和驱动器 Full-Bridge PWM Motor Driver 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 |
| MC34923EGR2 | 功能描述:马达/运动/点火控制器和驱动器 VERSION 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 |
| MC34925 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL 4WAY 制造商:PRIVATE LABEL 功能描述:HEADER, VERTICAL, 4WAY, Product Range:MULTICOMP - MC34 Series, Contact Terminati 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONNECTOR, RCPT, 4POS, 4.2MM, Series:2266(5566)RA, Pitch Spacing:4.2mm, Contact Termination:Through Hole Vertical, No. of Contacts:4, No. of Rows:1, Connector Mounting:PCB, Gender:Receptacle, Contact Material:Brass , RoHS Compliant: Yes |
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