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UC3770のメーカーはUnitrodeです、この部品の機能は「High Performance Stepper Motor Drive Circuit」です。 |
部品番号 | UC3770 |
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部品説明 | High Performance Stepper Motor Drive Circuit | ||
メーカ | Unitrode | ||
ロゴ | |||
このページの下部にプレビューとUC3770ダウンロード(pdfファイル)リンクがあります。 Total 3 pages
High Performance Stepper Motor Drive Circuit
UC3770A
UC3770B
FEATURES
• Full-Step, Half-Step and Micro-Step
Capability.
• Bipolar Output Current up to 2A.
• Wide Range of Motor Supply Voltage:
10–50V
• Low Saturation Voltage
• Wide Range of Current Control: 5mA–2A.
• Current Levels Selected in Steps or Varied
Continuously.
• Thermal Protection and Soft Intervention.
DESCRIPTION
The UC3770A and UC3770B are high-performance full bridge driv-
ers that offer higher current and lower saturation voltage than the
UC3717 and the UC3770. Included in these devices are LS-TTL
compatible logic inputs, current sense, monostable, thermal shut-
down, and a power H-bridge output stage. Two UC3770As or
UC3770Bs and a few external components form a complete micro-
processor-controllable stepper motor power system.
Unlike the UC3717, the UC3770A and the UC3770B require exter-
nal high-side clamp diodes. The UC3770A and UC3770B are
identical in all regards except for the current sense thresholds.
Thresholds for the UC3770A are identical to those of the older
UC3717 permitting drop-in replacement in applications where
high-side diodes are not required. Thresholds for the UC3770B are
tailored for half stepping applications where 50%, 71%, and 100%
current levels are desirable.
The UC3770A and UC3770B are specified for operation from 0°C
to 70°C ambient.
BLOCK DIAGRAM
SLUS403A - FEBRUARY 2000
UDG-92039-1
1 Page UC3770A
UC3770B
ELECTRICAL CHARACTERISTICS (cont.): (All tests apply with VM = 36V, VCC = 5V, VR = 5V, No Load, and 0°C<TA<70°C,
unless otherwise stated, TA = TJ.)
PARAMETER
Turn Off Delay
Sink Driver Saturation Voltage
Source Driver Saturation Voltage
Output Leakage Current
TEST CONDITIONS
IM = 1.0A
IM = 1.3A
IM = 1.0A
IM = 1.3A
VM = 45V
UC3770A
MIN TYP MAX
2
0.8
1.3
1.3
1.6
100
UC3770B
MIN TYP MAX
2
0.8
1.3
1.3
1.6
100
UNITS
ms
V
V
V
V
µA
TA = +25°C
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT CURRENT – A
Figure 1. Typical source saturation voltages vs. load
current
TA = +25°C
5.0
4.5
4.0
3.5
3.0
2.5
0.2
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT CURRENT – A
Figure 3. Typical supply current vs. load current.
TA = +25°C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT CURRENT – A
Figure 2. Typical sink saturation voltages vs. load
current
5
4
3
2
1
0
0 0.5 1 1.5 2
OUTPUT CURRENT (A)
Figure 4. Typical power dissipation vs. output
current.
UNITRODE CORPORATION
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. 603-424-2410 • FAX 603-424-3460
3
3Pages | |||
ページ | 合計 : 3 ページ | ||
|
PDF ダウンロード | [ UC3770 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
UC3770 | High Performance Stepper Motor Drive Circuit | Unitrode |
UC3770A | High Performance Stepper Motor Drive Circuit (Rev. A) | Texas Instruments |
UC3770B | High Performance Stepper Motor Drive Circuit (Rev. A) | Texas Instruments |