Datasheet > 3965

3965

更新时间： 2024-11-23 22:13:47

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
7页	180K
描述
DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER

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3965 数据手册

3965

PRELIMINARY DATASHEET - 12/4/2002

(Subject to change without notice)

DMOS DUAL FULL-BRIDGE

PWM MOTOR DRIVER

Designed for Pulse Width Modulated (PWM) current control of low

voltage stepper motors, the A3965S is capable of output currents to ± 500 mA

and operating voltages to 20 V.

ABSOLUTE MAXIMUM RATINGS

at T = +25°C

The A3965 is particularly attractive for low power or battery

operated motors where minimal power consumption is desired. A SLEEP

mode disables all circuitry and typically draws less than 1µA supply current

from motor and logic supply. During operation the fixed frequency ON

pulses of each H-bridge are 180 degrees out of phase to minimize the peak

demand required of the motor supply allowing savings in size and cost of

external power supply components.

Load Supply Voltage, VBB ..........................20 V

Output Current, I_OUT............................ ±500 mA*

Logic Supply Voltage, V_DD..........................7.0 V

Logic Input Voltage Range,

V_IN......................-0.3 V to V_DD+ 0.3 V

(t_W<30ns)..................-1.0V to V_DD+1V

Sense Voltage, V_SENSE..................................0.5 V

Reference Voltage, V_REF.................................3 V

PHASE and ENABLE input terminals are provided for use in

controlling the speed and direction of a stepper motor with externally applied

PWM control signals.

Package Power Dissipation (T = +25°C), P_D

A3965SLB........................... 50°C/W**

Internal circuit protection includes thermal shutdown with

hysteresis, undervoltage monitoring of V_DDand charge pump, and crossover

current protection. Special power up sequencing is not required.

Operating Temperature Range,

T_A................................ -20°C to +85°C

Junction Temperature, T_J......................... +150°C

Storage Temperature Range,

The A3965 is supplied in a 24-lead plastic SOIC with a copper

batwing tab (suffix ‘LB’).

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.

*Measured with 062" thick FR4, two sided PCB with 1 sq

inch copper area.

FEATURES

±500 mA, 20 V Output Rating

2.85 to 5.5V Logic Supply Operation

Sleep Mode for Minimum Power Consumption

Fixed Frequency PWM

Offset On Pulses to Minimize Peak Supply Transient Currents

Internal UVLO and Thermal Shutdown Circuitry

Crossover-Current Protection

12 3 4 5 6 7

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