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UC3770B

Features: • Full-Step, Half-Step and Micro-Step Capability.• Bipolar Output Current up to 2A.• Wide Range of Motor Supply Voltage: 1050V• Low Saturation Voltage• Wide Range of Current Control: 5mA2A.• Current Levels Selected in Steps or Varied Continuously.̶...

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SeekIC No. : 004535598 Detail

UC3770B: Features: • Full-Step, Half-Step and Micro-Step Capability.• Bipolar Output Current up to 2A.• Wide Range of Motor Supply Voltage: 1050V• Low Saturation Voltage• Wide R...

UC3770B Data Sheet

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Part Number:
UC3770B
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Full-Step, Half-Step and Micro-Step Capability.
• Bipolar Output Current up to 2A.
• Wide Range of Motor Supply Voltage: 1050V
• Low Saturation Voltage
• Wide Range of Current Control: 5mA2A.
• Current Levels Selected in Steps or Varied Continuously.
• Thermal Protection and Soft Intervention.


Pinout

Connection Diagram


Specifications

Logic Supply Voltage, VCC . . . . . . . . . .. . . . .... . . 7V
Output Supply Voltage, VMM. . . . . . . ..  .. . . . . . 50V
Logic Input Voltage (Pins 7, 8, 9) . . . . . . . . . .. . . 6V
Analog Input Voltage (Pin 10) . . . . . . . .  . . . .. . VCC
Reference Input Voltage (Pin 11) . . . . . . .  . . . . 15V
Logic Input Current (Pins 7, 8, 9) . . . . . . .  . 10mA
Analog Input Current (Pins 10, 11) . . . .  .  . 10mA
Output Current (Pins 1, 15) . . . . . . . .  . . . . . . ± 2A
Junction Temperature, TJ . . . . . . . . . ......... . +150

Note 1: All voltages are with respect to Gnd (DIL Pins 4, 5, 12, 13); all currents are positive into, negative out of
             the specified terminal.
Note 2: Consult Unitrode Integrated Circuits databook for thermal limitations and considerations of packages.


Description

The UC3770A and UC3770B are high-performance full bridge drivers 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 shutdown, and a power H-bridge output stage. Two UC3770As or UC3770Bs and a few external components form a complete microprocessor- controllable stepper motor power system.

Unlike the UC3717, the UC3770A and the UC3770B require external 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 to 70 ambient.




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