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參數(shù)資料
| 型號： | 5962-9168901MXA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2 A, CDIP28 |
| 封裝： | CERAMIC, DIP-28 |
| 文件頁數(shù)： | 22/23頁 |
| 文件大?。?/td> | 466K |
| 代理商： | 5962-9168901MXA |
www.ti.com
SLUS353B – NOVEMBER 2003 – REVISED APRIL 2007
DEVICE INFORMATION (continued)
Terminal Functions (continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
Any time that VCC drops below threshold or the sensed current exceeds the
over-current threshold, the soft-start latch is set. When set, it turns on a transistor
that pulls down on SSTART. Normally, a capacitor is connected to this pin, and
the transistor will completely discharge the capacitor. A comparator senses when
the NPN transistor has completely discharged the capacitor, and allows the
soft-start latch to clear when the fault is removed. When the fault is removed, the
soft-start capacitor charges from the on-chip current source.
SSTART clamps the output of the error amplifier, not allowing the error amplifier
SSTART
24
output voltage to exceed SSTART regardless of input. The ramp on RC-OSC can
be applied to PWM In and compared to E/A OUT. With SSTART discharged below
0.2 V and the ramp minimum being approximately 1.0 V, the PWM comparator
keeps the PWM latch cleared and the outputs off. As SSTART rises, the PWM
comparator begins to duty-cycle modulate the PWM latch until the error amplifier
inputs overcome the clamp. This provides for a safe and orderly motor start-up
from an off or fault condition. A 51-k
resister is added between VREF and
SSTART to ensure switching.
Any change in the H1, H2, or H3 inputs loads data from these inputs into the
position sensor latches. At the same time data is loaded, a fixed-width 5-V pulse is
triggered on TACH-OUT. The average value of the voltage on TACH-OUT is
directly proportional to speed, so this output can be used as a true tachometer for
speed feedback with an external filter or averaging circuit which usually consists of
TACH-OUT
20
a resistor and capacitor.
Whenever TACH-OUT is high, the position latches are inhibited, such that during
the noisiest part of the commutation cycle, additional commutations are not
possible. Although this effectively sets a maximum rotational speed, the maximum
speed can be set above the highest expected speed, preventing false
commutation and chatter.
This device operates with supplies between 10 V and 18 V. Under-voltage lockout
keeps all outputs off below 7.5 V, insuring that the output transistors never turn on
VCC
19
until full drive capability is available. Bypass VCC to ground with an 0.1-
F
ceramic capacitor. Using a 10-
F electrolytic bypass capacitor as well can be
beneficial in applications with high supply impedance.
This pin provides regulated 5 V for driving Hall-effect devices and speed control
circuitry. VREF reachs 5 V before VCC enables, ensuring that Hall-effect devices
VREF
2
powered from VREF becomes active before the UC3625 drives any output.
Although VREF is current limited, operation over 30 mA is not advised. For proper
performance VREF should be bypassed with at least a 0.1-
F capacitor to ground.
8
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| 5962-9168902VYA | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 SPACE-RATE 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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| 5962-9169003MXA | 制造商:Analog Devices 功能描述:ADC Single SAR 12-bit Parallel 28-Pin CDIP 制造商:Analog Devices 功能描述:ADC SGL SAR 12-BIT PARALLEL 28CDIP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:IC, MONO 12-BIT ADC IC - Bulk 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC IC MONO 12-BIT ADC IC 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| 5962-9169004M3C | 制造商:Exar Corporation 功能描述: |
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