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參數(shù)資料
| 型號(hào)： | UDQ2916B-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | DUAL FULL-BRIDGE PWM MOTOR DRIVER |
| 中文描述： | 雙全橋PWM電機(jī)驅(qū)動(dòng) |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 585K |
| 代理商： | UDQ2916B-T |
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
www.allegromicro.com
7
Current Sensing
To minimize current sensing inaccuracies caused by ground
trace IR drops, each current-sensing resistor should have a
separate return to the ground terminal of the device. For low-
value sense resistors, the IR drops in the PCB can be significant
and should be taken into account. The use of sockets should be
avoided as their contact resistance can cause variations in the
effective value of RS.
Generally, larger values of RS reduce the aforementioned effects
but can result in excessive heating and power loss in the sense
resistor. The selected value of RS should not cause the absolute
maximum voltage rating of 1.5 V, for the SENSE terminal, to be
exceeded. The recommended value of RS is in the range of:
R
S
= 0.75 /
I
TRIP
(max) ± 50% .
If desired, the reference input voltage can be filtered by placing
a capacitor from REFIN to ground. The ground return for this
capacitor as well as the bottom of any resistor divider used
should be independent of the high-current power-ground trace to
avoid changes in REFIN due to IR drops.
Thermal Considerations
For reliable operation, it is recommended that the maximum
junction temperature be kept below 110°C to 125°C. The
junction temperature can be measured best by attaching a
thermocouple to the power tab or batwing of the device and
measuring the tab temperature, TTAB. The junction temperature
can then be approximated by using the formula:
T
J
=
T
TAB
+ (2
×
I
LOAD
×
V
F
×
R
θ
JT
) ,
where VF can be chosen from the electrical specification table
for the given level of ILOAD. The value for R
θ
JT is approximately
6°C/W for both package styles.
The power dissipation of the batwing packages can be improved
20% to 30% by adding a section of printed circuit board copper
(typically 6 to 18 square centimeters) connected to the batwing
terminals of the device.
The thermal performance in applications that run at high load
currents, high duty cycles, or both can be improved by adding
external diodes from each output to ground in parallel with the
internal diodes. Fast-recovery (
≤
200 ns) diodes should be used
to minimize switching losses.
Load Supply Terminal
The load supply terminal, VBB, should be decoupled with an
electrolytic capacitor (
≥
47μF is recommended), placed as close
to the device as is physically practical. To minimize the effect of
system ground IR drops on the logic and reference input signals,
the system ground should have a low-resistance return to the
load supply voltage.
Fixed Off-Time Selection
With increasing values of tOFF, switching losses decrease, low-
level load current regulation improves, EMI reduces, PWM
frequency decreases, and ripple current increases. The value of
tOFF can be chosen for optimization of these parameters. For
applications where audible noise is a concern, typical values of
tOFF should be chosen in the range of 15 to 35 μs.
APPLICATION NOTES
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| UDQ2916EB | 功能描述:IC MOTOR DRIVER PWM DUAL 44PLCC 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 |
| UDQ2916EBTR | 功能描述:IC MOTOR DRIVER PWM DUAL 44PLCC 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 |
| UDQ2916LB | 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 |
| UDQ2916LB-T | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:DUAL FULL-BRIDGE PWM MOTOR DRIVER |
| 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 |
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