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參數(shù)資料
| 型號(hào)： | UDQ2916LB-T |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1 A, PDSO24 |
| 封裝： | LEAD FREE, MS-013AD, SOIC-24 |
| 文件頁(yè)數(shù)： | 5/9頁(yè) |
| 文件大小： | 465K |
| 代理商： | UDQ2916LB-T |
Dual Full-Bridge Motor Driver
2916
5
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-
5000
www.allegromicro.com
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, RS,
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, VSENSE , reaches the level set at the comparator
input:
ITRIP = VREF/10 RS
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
trip point (especially for low-inductance loads) because of the
internal logic and switching delays. This delay, td , is typically
2 μs. 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:
toff = RTCT
where:
RT = 20 to 100 kΩ, and
CT = 100 to 1000 pF.
The xed off-time should be short enough to keep the current
chopping above the audible range (< 46 μs) and long enough
to properly regulate the current. Because only slow-decay
current control is available, short off times (< 10 μs) 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 RS) will
attempt to trip the comparator, resulting in erroneous current
control or high-frequency oscillations. An external RCCC
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).
PWM OUTPUT CURRENT WAVE FORM
LOAD CURRENT PATHS
+
–
0
Dwg. W M-003-1A
V PHAS E
I
OUT
td
toff
I TR IP
Dwg. E P -006-1
R S
BB
V
BR IDG E ON
SOUR C E OF F
ALL OF F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| UDQ2916LBTR | 功能描述:IC MOTOR DRIVER PWM DUAL 24SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| UDQ2916LBTR-T | 功能描述:IC MOTOR DRIVER PWM DUAL 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| UDQ2917EB | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:DUAL FULL-BRIDGE PWM MOTOR DRIVER |
| UDQ2936W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| UDQ2936W-120 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER |
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