A4950ELJTR-T Allegro Microsystems Inc, A4950ELJTR-T Datasheet
A4950ELJTR-T
Specifications of A4950ELJTR-T
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A4950ELJTR-T Summary of contents
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Features and Benefits • Low R outputs DS(on) • Overcurrent protection (OCP) ▫ Motor short protection ▫ Motor lead short to ground protection ▫ Motor lead short to battery protection • Low Power Standby mode • Adjustable PWM current limit ...
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... A4950 Selection Guide Part Number A4950ELJTR-T 3000 pieces per 13-in. reel A4950ELJ-T 98 pieces per tube Absolute Maximum Ratings Characteristic Load Supply Voltage Logic Input Voltage Range V Input Voltage Range REF Sense Voltage (LSS pin) Motor Outputs Voltage Output Current Peak Output Current ...
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A4950 ELECTRICAL CHARACTERISTICS Characteristics General Load Supply Voltage Range R Sink + Source Total DS(on) Load Supply Current Body Diode Forward Voltage Logic Inputs Logic Input Voltage Range V Logic Input Current Logic Input Pull-Down Resistance R RR Input Hysteresis ...
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A4950 PWM Control Timing Diagram V IN(1) IN1 V IN(0) V IN(1) IN2 V IN(0) +I REG I , OUT1 OUT2 –I REG PWM Control Truth Table IN1 IN2 10× ...
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A4950 Device Operation The A4950 is designed to operate DC motors. The output drivers are all low-R , N-channel DMOS drivers that feature inter- DS(on) nal synchronous rectification to reduce power dissipation. The current in the output full bridge is ...
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A4950 Synchronous Rectification When a PWM off-cycle is triggered by an internal fixed off-time cycle, load current will recirculate. The A4954 synchronous rec- tification feature turns-on the appropriate DMOSFETs during the current decay, and effectively shorts out the body diodes ...
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A4950 Sense Pin (LSS) In order to use PWM current control, a low-value resistor is placed between the LSS pin and ground for current sensing pur- poses. To minimize ground-trace IR drops in sensing the output current level, the current ...
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A4950 4.90 ±0.10 8 2.41 NOM 3.30 NOM 8X 0.10 C 0.51 0.31 1.27 BSC Full-Bridge DMOS PWM Motor Driver Package LJ, 8-Pin SOICN with exposed thermal pad 8° 0° 0.25 0.17 B 3.90 ±0.10 6.00 ±0.20 ...
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A4950 Copyright ©2011, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec tions as may be required to per- mit improvements in the ...