Electronic Components Datasheet Search |
|
3958 Datasheet(PDF) 1 Page - Allegro MicroSystems |
|
3958 Datasheet(HTML) 1 Page - Allegro MicroSystems |
1 / 12 page 3958 DMOS FULL-BRIDGE PWM MOTOR DRIVER Always order by complete part number: Part Number Package RθJA RθJT A3958SB 24-pin batwing DIP 40 °C/W 6 °C/W A3958SLB 24-lead batwing SOIC 56 °C/W 6 °C/W 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 off- time 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-lead 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. FEATURES I ±2 A, 50 V Continuous Output Rating I Low r DS(on) Outputs (270 mΩ, Typical) I Programmable Mixed, Fast, and Slow Current-Decay Modes I Serial Interface Controls Chip Functions I Synchronous Rectification for Low Power Dissipation I Internal UVLO and Thermal-Shutdown Circuitry I Crossover-Current Protection A3958SLB VBB 24 23 22 21 20 19 18 17 16 15 14 13 GROUND GROUND RANGE NO CONNECTION OUTB LOAD SUPPLY SENSE OUTA NO CONNECTION MODE REF VREG Dwg. PP-069 1 2 3 4 5 6 7 8 9 12 11 10 9 GROUND GROUND CP CP2 CP1 PHASE VCC ENABLE DATA CLOCK STROBE LOGIC SUPPLY θ OSC NC NC ÷ ABSOLUTE MAXIMUM RATINGS Load Supply Voltage, VBB .................. 50 V Output Current, IOUT........................ ±2.0 A Logic Supply Voltage, VDD ................ 7.0 V Input Voltage, VIN .... -0.3 V to VDD + 0.3 V Sense Voltage, VS ............................ 0.5 V Reference Voltage, VREF .................. 2.7 V Package Power Dissipation (TA = 25°C), PD A3958SB ................................. 3.1 W* A3958SLB ............................... 2.2 W* Operating Temperature Range, TA ............................... -20 °C to +85°C Junction Temperature, TJ ............................................ +150 °C Storage Temperature Range, TS ............................. -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. Note that the A3958SLB(SOIC) and A3958SB (DIP) do not share a common terminal assignment. |
Similar Part No. - 3958 |
|
Similar Description - 3958 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |