3961, 396-10V, 396-11V Selling Leads, Datasheet
MFG:RC Package Cooled:0518W150K D/C:KOA
3961, 396-10V, 396-11V Datasheet download
Part Number: 3961
MFG: RC
Package Cooled: 0518W150K
D/C: KOA
3961, 396-10V, 396-11V
- Table of contents:
Info of 3961
Info of 396-10V
Info of 396-11V
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About 3961
PDF/DataSheet Download
Datasheet: 3961
File Size: 93429 KB
Manufacturer: ALLEGRO [Allegro MicroSystems]
Download : Click here to Download
About 3961
PDF/DataSheet Download
Datasheet: 3961
File Size: 93429 KB
Manufacturer: ALLEGRO [Allegro MicroSystems]
Download : Click here to Download
About 3961
PDF/DataSheet Download
Datasheet: 3961
File Size: 93429 KB
Manufacturer: ALLEGRO [Allegro MicroSystems]
Download : Click here to Download
3961 General Description
Designed for pulse-width modulated (PWM) current control of bipolar stepper motors, the A3961S- is capable of continuous output currents to ±800 mA and operating voltages to 45 V. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. An internal precision voltage reference is provided to improve motor peak current control accuracy. The peak load current limit is set by the user's selection of an external resistor divider and current-sensing resistors.
The fixed off-time pulse duration is set by user-selected external RC timing networks. The capacitor in the RC timing network also determines a user-selectable blanking window that prevents false triggering of the PWM current control circuitry during switching transi-tions. This eliminates the need for two external RC filter networks on the current-sensing comparator inputs.
For each bridge the PHASE input controls load current polarity by selecting the appropriate source and sink driver pair. For each bridge the ENABLE input, when held high, disables the output drivers. Specia power-up sequencing is not required. Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and
crossover-current protection.
The A3961S- is supplied in a choice of two power packages:24-pin dual-in-line plastic package with copper heat-sink tabs and 24-lead plastic SOIC with copper heat-sink tabs. In both packages the power tab is at ground potential and needs no electrical isolation.
3961 Maximum Ratings
Load Supply Voltage, VBB . . . . . . . .... . . 45 V
Output Current, IOUT . . . . . . . . ... . ±800 mA*
Logic Supply Voltage, VCC . . . . . . . . .... 7.0 V
Logic Input Voltage Range,
VIN . . . . . . . . . ...... . -0.3 V to VCC + 0.3 V
Sense Voltage, VSENSE . . . . . . . . . . . . 1.0 V
Reference Output Current,
IREF OUT . . . . . . . . . . . . . . . . . ....... . 1.0 mA
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . ..... .. See Graph
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, IOUT . . . . . . . . ... . ±800 mA*
Logic Supply Voltage, VCC . . . . . . . . .... 7.0 V
Logic Input Voltage Range,
VIN . . . . . . . . . ...... . -0.3 V to VCC + 0.3 V
Sense Voltage, VSENSE . . . . . . . . . . . . 1.0 V
Reference Output Current,
IREF OUT . . . . . . . . . . . . . . . . . ....... . 1.0 mA
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . ..... .. See Graph
Operating Temperature Range,
TA . . . . . . . . . . . . . . . . . -20°C to +85°C
Junction Temperature, TJ . . .. . . . . +150°C†
Storage Temperature Range,
TS . . . . . . . . . . . . . . . . -55°C to +150°C
3961 Features
REFERENCE ±800 mA Continuous Output Current Rating
45 V Output Voltage Rating
Internal PWM Current Control, Saturated Sink Drivers
Internally Generated Precision 2.5 V Reference
nternal Transient-Suppression Diodes
Internal Thermal-Shutdown Circuitry
Crossover-Current Protection, UVLO Protection
45 V Output Voltage Rating
Internal PWM Current Control, Saturated Sink Drivers
Internally Generated Precision 2.5 V Reference
nternal Transient-Suppression Diodes
Internal Thermal-Shutdown Circuitry
Crossover-Current Protection, UVLO Protection
3961 Connection Diagram
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