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UC3770BNTIN/a38avaiHigh Performance Stepper Motor Drive Circuit
UC3770BNUCN/a16avaiHigh Performance Stepper Motor Drive Circuit


UC3770BN ,High Performance Stepper Motor Drive CircuitFEATURESDESCRIPTION• Full-Step, Half-Step and Micro-Step The UC3770A and UC3770B are high-performan ..
UC3823ADW ,High Speed PWM ControllerSLUS334E − AUGUST 1995 − REVISED SEPTEMBER 2010These devices have limited built-in ESD protection. ..
UC3823ADWTR ,High Speed PWM ControllerFEATURES DESCRIPTION Improved Versions of the UC3823/UC3825The UC3823A and UC3823B and the UC3825A ..
UC3823AN ,High Speed PWM Controller UC2825A, UC2825B, UC3825A, UC3825BSLUS334E − AUGUST 1995 − REVISED SEPTEMBER 2010TERMINAL FUNCTION ..
UC3823AQ , High Speed PWM Controller
UC3823AQ , High Speed PWM Controller
UMG2 N TR , NPN 100mA 50V Complex Digital Transistors (Bias Resistor Built-in Transistors)
UMG2 NTR , NPN 100mA 50V Complex Digital Transistors (Bias Resistor Built-in Transistors)
UMG2N , NPN 100mA 50V Complex Digital Transistors (Bias Resistor Built-in Transistors)
UMG2NTR , NPN 100mA 50V Complex Digital Transistors (Bias Resistor Built-in Transistors)
UMG3N , General purpose transistors (dual transistors)
UMG4N TR , NPN 100mA 50V Complex Digital Transistors


UC3770BN
High Performance Stepper Motor Drive Circuit
BLOCK DIAGRAM 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.
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. Includedin these devices are LS-TTL
compatible logic inputs, current sense, monostable, thermal shut-
down, anda power H-bridge output stage. Two UC3770As or
UC3770Bs anda few external components forma 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
identicalin all regards except for the current sense thresholds.
Thresholds for the UC3770A are identicalto thoseof the older
UC3717 permitting drop-in replacement in applications where
high-side diodes are not required. Thresholdsfor 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.
UC3770A
UC3770B

High Performance Stepper Motor Drive Circuit
FEATURES DESCRIPTION
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