A3958SLB

Series: -
Number of Outputs: 1
Mounting Type: Surface Mount
Evaluation Tools: -
Packaging: Tube
Applications: PWM Motor Driver
Current - Output: ±2A
Voltage - Supply: 4.5 V ~ 5.5 V
Operating Temperature: -20°C ~ 85°C
Manufacturer: Allegro Microsystems Inc
Package / Case: 24-SOIC (0.295", 7.50mm Width)
Supplier Device Package: 24-SOIC W
Voltage - Load: 20 V ~ 50 V


Features:

·±2 A, 50 V Continuous Output Rating
·Low r_DS(on) Outputs (270 mΩ, Typical)
·Programmable Mixed, Fast, and Slow Current-Decay Modes
·Serial Interface Controls Chip Functions
·Synchronous Rectification for Low Power Dissipation
·Internal UVLO and Thermal-Shutdown Circuitry
·Crossover-Current Protection


Pinout




Specifications

Load Supply Voltage, V_BB .......................... 50 V
Output Current, I_OUT ............................. ±2.0 A
Logic Supply Voltage, V_DD ......................... 7.0 V
Input Voltage, V_IN ............ -0.3 V to V_DD + 0.3 V
Sense Voltage, V_S ..................................... 0.5 V
Reference Voltage, V_REF ........................... 2.7 V
Package Power Dissipation (T_A = 25°C), PD
A3958SB ................................................ 3.1 W*
A3958SLB .............................................. 1.6 W*
Operating Temperature Range,
T_A .......................................... -20°C to +85°C
Junction Temperature,
T_J ........................................................ +150°C
Storage Temperature Range,
T_S ....................................... -55°C to +150°C
Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C.
* Per SEMI G42-88 Specification.

Description

Designed for pulse-width modulated (PWM) current control of dc motors, the A3958SB and A3958SLB are capable of continuous output currents to ±2 A and operating voltages to 50 V. Internal fixed offtime PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.

PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a dc motor with externally applied PWM-control signals. The ENABLE input can be programmed via the serial port to PWM the bridge in fast or slow current decay.

Internal synchronous rectification control circuitry is provided to reduce power dissipation during PWM operation. Internal circuit protection includes thermal shutdown with hysteresis, and crossover-current protection. Special power-up sequencing is not required.

The A3958SB/SLB is supplied in a choice of two power packages, a 24-pin plastic DIP with a copper batwing tab (package suffix 'B'), and a 24-pin plastic SOIC with a copper batwing tab (package suffix 'LB'). In both cases, the power tab is at ground potential and needs no electrical isolation. Each package type is available in a lead-free version (100% matte tin leadframe).

Parameters:

Technical/Catalog Information	A3958SLB
Vendor	Allegro Microsystems Inc
Category	Integrated Circuits (ICs)
Applications	PWM Motor Driver
Number of Outputs	1
Voltage - Supply	4.5 V ~ 5.5 V
Voltage - Load	20 V ~ 50 V
Current - Output	±2A
Operating Temperature	-20°C ~ 85°C
Package / Case	24-SOIC (7.5mm Width)
Packaging	Tube
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	A3958SLB A3958SLB