參數(shù)資料
型號(hào)： UC3625J
廠商： Texas Instruments, Inc.
英文描述： Brushless DC Motor Controller
中文描述： 無刷直流電機(jī)控制器
文件頁(yè)數(shù)： 9/15頁(yè)
文件大?。?/td> 313K
代理商： UC3625J
9
UC1625
UC2625
UC3625
Figure 6. Soft start discharge current vs.
temperature.
TYPICAL CHARACTERISTICS (cont.)
Figure 7. Current sense amplifier transfer function.
Power Stage Design
The UC3625 is useful in a wide variety of applications,
including high-power in robotics and machinery.
power output stages used in such equipment can take a
number of forms, according to the intended perfor-
mance and purpose of the system. Below are four differ-
ent
power
stages
with
disadvantages of each shown.
The
the
advantages
and
For high-frequency chopping, fast recovery circulating
diodes are essential. Six are required to clamp the wind-
ings. These diodes should have a continuous current
rating at least equal to the operating motor current,
since diode conduction duty-cycle can be high.
low-voltage systems, Schottky diodes are preferred. In
higher voltage systems, diodes such as Microsemi
UHVP high voltage platinum rectifiers are recom-
mended.
For
In a pulse-by-pulse current control arrangement, current
sensing is done by resistor R
S
, through which the tran-
sistor's currents are passed (Fig. A, B, and C). In these
cases, R
D
is not needed. The low-side circulating di-
odes go to ground and the current sense terminals of
the UC3625 (I
SENSE1
and I
SENSE2
) are connected to R
S
through a differential RC filter. The input bias current of
the current sense amplifier will cause a common mode
offset voltage to appear at both inputs, so for best accu-
racy, keep the filter resistors below 2k
and matched.
The current that flows through R
S
is discontinuous be-
cause of chopping. It flows during the on time of the
power stage and is zero during the off time. Conse-
quently, the voltage across R
S
consists of a series of
pulses, occurring at the PWM frequency, with a peak
value indicative of the peak motor current.
To sense average motor current instead of peak cur-
rent, add another current sense resistor (R
D
in Fig. D) to
measure current in the low-side circulating diodes, and
operate in four quadrant mode (pin 22 high). The nega-
tive voltage across R
D
is corrected by the absolute
value current sense amplifier. Within the limitations im-
posed by Table 1, the circuit of Fig. B can also sense
average current.
APPLICATION INFORMATION (cont.)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UC3625N 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Brushless DC Motor Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
UC3625NG4 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Brushless DC Motor Cntrlr RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
UC3625Q 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Brushless DC Motor Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
UC3625Q 制造商:Texas Instruments 功能描述:DC MOTOR CONTROLLER 3625 PLCC28
UC3625QG4 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Brushless DC Motor Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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