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Description
FULL-BRIDGE PWM MOTOR DRIVER
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Designed for bidirectional pulse-width modulated current control of inductive loads, the A3951SB and A3951SW are capable of continuous output currents to ±2 A and operating voltages to 50 V. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. The peak load current limit is set by the user’s selection of an input reference voltage and external sensing resistor. The fixed off-time pulse duration is set by a user-selected external RC timing network. Internal circuit protection includes thermal shutdown with hysteresis, transient suppression diodes, and crossover-current protection. Special power-up sequencing is not required. The A3951SB and A3951SW are improved replacements for the UDN2953B and UDN2954W, respectively. For new system designs, the A3952SB/SEB/SLB/SW are recommended.
With the ENABLE input held low, the PHASE input controls load current polarity by selecting the appropriate source and sink driver pair. A user-selectable blanking window prevents false triggering of the PWM current control circuitry. With the ENABLE input held high, all output drivers are disabled.
When a logic low is applied to the BRAKE input, the braking function is enabled. This overrides ENABLE and PHASE to turn off both source drivers and turn on both sink drivers. The brake function can be safely used to dynamically brake brush dc motors.
The A3951SB is supplied in a 16-pin dual in-line plastic package with copper heat-sink contact tabs. The lead configuration enables easy attachment of a heat sink while fitting a standard printed wiring board layout. The A3951SW, for higher package power dissipation requirements, is supplied in a 12-pin single in-line power-tab package.In either package style, the batwing/power tab is at ground potential and needs no isolation.
FEATURES
● ±2 A Continuous Output Current Rating
● 50 V Output Voltage Rating
● Internal PWM Current Control
● Internal Transient Suppression Diodes
● Under-Voltage Lockout
● Internal Thermal Shutdown Circuitry
● Crossover-Current Protection
● Default Brake Current Limit
Preview of the first 3 pages of the data sheet
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10000 buyer reviews from United States
Jason Adams
Length of registration:7 years
The A3951SW integrated circuit from Utsource is a high-performance device designed for motion control applications. It features a wide operating voltage range of 4.5V to 36V, a high-speed PWM frequency of up to 25kHz, and a low-resistance output stage for improved efficiency. The device also features an adjustable current-limit protection and a thermal shutdown protection for improved safety.
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03/17/2023
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All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
A3951SW
A3951SW has several brands around the world that may have alternate names for A3951SW due to regional differences or acquisition. A3951SW may also be known as the following names:
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Stock Status: 10000
Minimum: 1
Total Price:
Unit Price:5.57200
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