UC3770BN

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Texas Instruments

HIGH PERFORMANCE STEPPER MOTOR DRIVE CIRCUIT

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UC3770BN

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Texas Instruments

HIGH PERFORMANCE STEPPER MOTOR DRIVE CIRCUIT

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Description Specifications Series Pricing CAD Documents

Description

General part information

UC3770 Series

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 micro-processor-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°C to 70°C ambient.

Technical Specifications

Parameters and characteristics for this part

Specification	UC3770BN

Applications	Stepper Motors, General Purpose
Current - Output / Channel	2 A
Fault Protection	Over Temperature
Half-Bridge Count	2
Interface	Logic
Load Type	Inductive
Mounting Type	Through Hole
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	0 °C
Output Configuration	Half Bridge
Package Length	0.3 in
Package Name	16-DIP, 16-PDIP
Package Width	7.62 mm
Technology	Bipolar
Voltage - Load (Max)	45 V
Voltage - Load (Min)	10 V
Voltage - Supply (Maximum)	5.3 V
Voltage - Supply (Minimum)	4.75 V

UC3770 Series

High Performance Stepper Motor Drive Circuit

Part	Load Type	Interface	Package Length	Package Name	Package Width	Applications	Technology	Current - Output / Channel	Operating Temperature (Max)	Half-Bridge Count	Output Configuration	Mounting Type	Fault Protection	Package / Case	Voltage - Load (Min)	Voltage - Load (Max)	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)
Texas Instruments UC3770AQ	Inductive	Logic	11.51 mm	28-PLCC	11.51 mm	General Purpose Stepper Motors	Bipolar	2 A	150 °C	2	Half Bridge	Surface Mount	Over Temperature	28-LCC (J-Lead)	10 V	45 V	5.3 V	4.75 V
Texas Instruments UC3770BN	Inductive	Logic	0.3 in	16-DIP 16-PDIP	7.62 mm	General Purpose Stepper Motors	Bipolar	2 A	150 °C	2	Half Bridge	Through Hole	Over Temperature		10 V	45 V	5.3 V	4.75 V
Texas Instruments UC3770AQTR	Inductive	Logic	11.51 mm	28-PLCC	11.51 mm	General Purpose Stepper Motors	Bipolar	2 A	150 °C	2	Half Bridge	Surface Mount	Over Temperature	28-LCC (J-Lead)	10 V	45 V	5.3 V	4.75 V
Texas Instruments UC3770AN	Inductive	Logic	0.3 in	16-DIP 16-PDIP	7.62 mm	General Purpose Stepper Motors	Bipolar	2 A	150 °C	2	Half Bridge	Through Hole	Over Temperature		10 V	45 V	5.3 V	4.75 V
Texas Instruments UC3770ANG4	Inductive	Logic	0.3 in	16-DIP 16-PDIP	7.62 mm	General Purpose Stepper Motors	Bipolar	2 A	150 °C	2	Half Bridge	Through Hole	Over Temperature		10 V	45 V	5.3 V	4.75 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

UC3770BN | Datasheet

High Performance Stepper Motor Drive Circuit datasheet (Rev. A)