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| 型号： | UDN2916EB-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRIVER PWM DUAL 44PLCC |
| 标准包装： | 27 |
| 应用： | 直流电机驱动器，步进电机驱动器 |
| 输出数： | 2/1 |
| 电流 - 输出： | ±750mA |
| 电压 - 负载： | 10 V ~ 45 V |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC 蝙蝠翼式（16.59x16.59） |
| 包装： | 管件 |
2916
Dual Full-Bridge Motor Driver
APPLICATIONS INFORMATION
PWM CURRENT CONTROL
The UDx2916 dual bridges drive both windings of a bipolar
stepper motor. Output current is sensed and controlled
independently in each bridge by an external sense resistor, R S ,
internal comparator, and monostable multivibrator.
When the bridge is turned on, current increases in the motor
winding and it is sensed by the external sense resistor until the
sense voltage, V SENSE , reaches the level set at the comparator
input:
V P HAS E
PWM OUTPUT CURRENT WAVE FORM
+
I TRIP = V REF /10 R S
The comparator then triggers the monostable, which turns off
the source driver of the bridge.
The actual load current peak will be slightly higher than the
I OUT
0
–
I T R IP
trip point (especially for low-inductance loads) because of the
internal logic and switching delays. This delay, t d , is typically
2 μ s. After turn-off, the motor current decays, circulating
through the ground-clamp diode and sink transistor. The
source driver off-time (and therefore the magnitude of the
current decrease) is determined by the external RC timing
components of the monostable:
t d
t off
Dwg. WM-003-1A
where:
t off = R T C T
LOAD CURRENT PATHS
R T = 20 to 100 k Ω , and
C T = 100 to 1000 pF.
The ? xed off-time should be short enough to keep the current
chopping above the audible range (< 46 μ s) and long enough
to properly regulate the current. Because only slow-decay
current control is available, short off times (< 10 μ s) require
additional efforts to ensure proper current regulation. Factors
that can negatively affect the ability to properly regulate the
current when using short off times include: higher motor-
supply voltage, light load, and longer than necessary blank
time.
When the source driver is re-enabled, the winding current (the
sense voltage) is again allowed to rise to the comparator ’s
threshold. This cycle repeats itself, maintaining the average
motor winding current at the desired level.
Loads with high distributed capacitances may result in high
turn-on current peaks. This peak (appearing across R S ) will
attempt to trip the comparator, resulting in erroneous current
control or high-frequency oscillations. An external R C C C
time delay should be used to further delay the action of the
comparator. Depending on load type, many applications will
not require these external components (SENSE connected to E).
RS
V
BB
B R IDG E ON
S OUR C E OF F
ALL OF F
Dwg. E P -006-1
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-
5000
www.allegromicro.com
5
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| UDN2916EBTR | 功能描述:IC MOTOR DRIVER PWM DUAL 44PLCC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| UDN2916EBTR-T | 功能描述:IC MOTOR DRIVER PWM DUAL 44PLCC RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| UDN2916LB | 功能描述:IC MOTOR DRIVER PWM DUAL 24SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| UDN2916LB-T | 功能描述:IC MOTOR DRIVER PWM DUAL 24-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| UDN2916LBTR | 功能描述:IC MOTOR DRIVER PWM DUAL 24SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
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