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| 型号： | A4979GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/44页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR MICRO STEP 28TSSOP |
| 特色产品： | A4979 Series |
| 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 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | 1.5A |
| 电压 - 负载： | 7 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | 620-1463-6 |
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A4979
Microstepping Programmable Stepper Motor Driver
With Stall Detect and Short Circuit Protection
ELECTRICAL CHARACTERISTICS 1,2 (continued) Valid at T A = 25°C, V BB = 50 V, V DD = 3.3 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Logic Input And Output – Dynamic Parameters (continued)
Setup Time Control Input Change
to STEP
Hold Time Control Input Change
from STEP
Wake-Up from RESET
t SU
t H
t EN
MS1, MS2, DIR
MS1, MS2, DIR
200
200
–
–
–
–
–
–
1
ns
ns
ms
Diagnostics and Protection
VREG Undervoltage Threshold
VREG Undervoltage Hysteresis
VDD Undervoltage Threshold
VDD Undervoltage Hysteresis
OSC Timeout
High-Side Overcurrent Threshold
High-Side Current Limit
Low-Side Overcurrent Sense Voltage
Overcurrent Fault Delay
Open Load Current Threshold Error
Temperature Voltage Output Offset
Temperature Voltage Output Slope
Cold Temperature Warning Threshold
Cold Temperature Warning Hysteresis
Hot Temperature Warning Threshold
Hot Temperature Warning Hysteresis
Overtemperature Shutdown Threshold
Overtemperature Hysteresis
V REGUV
V RGUVHys
V DDUV
V DDUVHys
t WD
I OCH
I LIMH
V OCL
t SCT
E IOC
V TO
A T
T JWC
T JWChys
T JWH
T JWHhys
T JF
T Jhys
V REG falling
V DD falling
Bit 13 = 1
Sampled after t SCT
Active during t SCT
Sampled after t SCT
Default Fault Delay
V REF = 2 V, Mx0 = Mx1 = 1
Temperature output selected on DIAG pin
Temperature decreasing
Temperature increasing
Temperature increasing
Recovery = T JF – T Jhys
5.1
–
2.6
50
0.5
1.7
3
210
1500
–
–
–
–20
–
125
–
155
–
–
1
–
100
1
2.05
5.5
250
2000
–
1440
–3.92
–10
15
135
15
170
15
5.4
–
2.9
–
1.5
2.95
8
290
2700
±10
–
–
0
–
145
–
–
–
V
V
V
mV
μ s
A
A
mV
ns
%
mV
mV/°C
oC
oC
oC
oC
oC
oC
1 For
input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2 All
references to “VBB” apply to VBBA and VBBB.
3 Assumes a 4 MHz clock.
4 Current Trip Point Error is the difference between actual current trip point and the target current trip point, referred to maximum full scale (100%)
current: E Itrip = 100 × [I tripActual – I tripTarget ] / I FullScale (%).
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
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