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参数资料
| 型号： | A3998SETTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRIVER DUAL DMOS QFN |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，PWM 电机驱动器，步进电机驱动器 |
| 输出数： | 1 或 2 |
| 电流 - 输出： | ±1.5A |
| 电压 - 负载： | 9 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN |
| 包装： | 标准包装 |
| 其它名称： | 620-1459-6 |
A3998
Dual DMOS Full Bridge Motor Driver
With Serial Port Control and Dual Regulators
Features and Benefits
? 3.3/5 V switching regulator
? 1 to 2.5 V configurable linear regulator output
? Dual DMOS full bridge: drive two DC motors or
a single stepper motor
? ±1.5 A, 50 V output rating per bridge
? 4-bit microstepping capability
? Serial port control
? Configurable mixed, fast, and slow current decay
? Synchronous rectification for low power dissipation
? Internal UVLO and thermal shutdown circuitry
? Crossover-current protection
? OCP protection
Package: 32-contact QFN (suffix ET)
Description
Designed to provide the motor driver and power supply
requirements for printers and office automation equipment.
This integrated power IC incorporates two high current,
high performance, full bridge outputs, capable of 1.5 A at
50 V. Additionally two power supply rails are provided for
microprocessor or DSP supplies. A switching buck regulator
steps the supply down to a low voltage output that is adjustable
from 3.3 to 5 V. This voltage can be used to supply external 5 V
rails, it also feeds back into the part and supplies the integrated
linear regulator which is adjustable from 1 to 2.5 V.
The A3998 serial port provides flexible configuration for
the dual full bridge motor driver. Two full bridges can be
programmed to control one stepper motor or two DC motors.
Both bridges have integrated fixed off-time PWM control with
programmable decay mode selection.
The A3998 is supplied in a low profile, 32-contact QFN,
5 × 5 mm, 0.90 mm nominal height, with exposed thermal pad
(suffix ET). The package is lead (Pb) free with 100% matte-tin
leadframe plating.
Approximate size
Functional Block Diagram
0.1 μ F
0.22 μ F
VREG
Gate Supply
Charge Pump
VCP
0.1 μ F
42 V
VREF
Buffer
D/A
PWM Control
Full Bridge 1
VBB
OUT1A
220 μ F
Full Bridge
Controller
SLEEPn
ENB1
ENB2
DATA
CLK
STB
CLK
System
Control
Serial
Port
Control
Logic
1
Full Bridge
OUT1B
SENSE1
VBB
OUT2A
RS1
0.22 μ F
2
PMON
VBB
Monitor
D/A
PWM Control
Full Bridge 2
OUT2B
SENSE2
VBB
RS2
VOUT1
VREG
VIN
VOUT1
3.3 to 5V
1A
L1
SW1
VBB
To VREG
R CL2
D1
CSN
COUT1
220 μ F
R1
R2
FB1
Switcher PWM Control
FB1
LDO
POR
GD/VOUT2
FB2
RST
R4
R3
Q1
VOUT2
1 to 2.5 V
500 mA
COUT2
10 μ F
A3998-DS
C
PAD
100 ms
FRST
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| A399B | 制造商:Powerex Power Semiconductors 功能描述:DIODE FAST 400A 200V DO-200AA |
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