The A3903 is a low voltage bidirectional DC motor driver with a typical input voltage range of 3 to 5.5 V and output currents up to 500 mA. The unique output full-bridge incorporates source-side linear operation to allow a constant voltage across the motor coil. This regulated output minimizes motor voltage change due to I × R_DS(on) variation and battery voltage tolerance.

Logic input pins are provided to control the motor direction of rotation, brake, and standby (< 500 nA supply current) modes and to allow optional PWM of the sink drivers. Internal protection circuitry includes thermal shutdown, undervoltage lockout, and crossover current (shoot-through) protection.

The A3903 is supplied in a 2 mm × 2 mm, 0.55 mm nominal height, 8-lead DFN package, with exposed thermal pad (package suffix EE). This small footprint package is lead (Pb) free, with 100% matte tin leadframe plating.

Portescap, a Danaher Motion Company, has expanded its family of brush DC motors by introducing 35GLT motors. These RoHS-compliant motors have a 35mm housing and weigh just 360 grams, while delivering a 40% increase in torque-to-volume ratio when compared with standard iron core motors of similar frame size. The maximum continuous torque approaches 150 mNm in the 35GLT, a 25% improvement over similar conventional models. They are available with five winding types in the voltage range of 24V to 90V, and are cost-effectively customizable for use with a range of gearboxes and encoders. More Information...

Quick Links:

• Visit the 35GLT product section
• Download the 35GLT product spec sheet
• View 35GLT Press Release
• Contact a Sales Engineer for your specific application questions or for price inquiries...
• Request a quotation....

"The 35GLT comes out of Portescap's history of innovation and experience in designing multi-layer coil Brush DC coreless motors, and is precision engineered to minimize speed variations at higher loads. As an example, the 48V coil has only 0.4% speed variation when the motor has a load fluctuation of 5 mNm at a continuous torque of 100 mNm. In medical, aerospace and electronics assembly markets, this unique design feature, for the 35GLT, improves actuation at higher torques," says Udayan Senapati, Brush DC Product Line Manager at Portescap.

View Portescap's extensive line of motor products by technology and their data sheets (use the links below):

• Brushless Slotted
• Brushless Slotless
• Gearmotors
• Brushed Ironless
• Stepper Disc Magnet
• Stepper Can Stack
• Encoders
• Stepper Hybrid
• Stepper Digital Linear Actuator

Portescap, A Danaher Motion Company - offers the broadest miniature motor product line in the industry, encompassing brush DC, brushless DC, stepper can stack, gear heads, digital linear actuators, disc magnet and hybrid technology. No matter what application you are addressing, the Portescap product range has a technology and product to suit your needs. Whether it is the simplicity of the can stack, the direct linear motion of the DLA, the high acceleration of the disc magnet, or the power of the hybrid, our products will solve any motion control requirement. And when your product calls for multiple axes of motion, one supplier can do it all, Portescap. Read what's new at Portescap!

Nothing else comes as close to 100%.
DC motors with moving coil rotor and high performance permanent magnets

Maxon DC motor programs may be distinguished as follows:

RE-Program

• Æ 6 - 75 mm
• 0.3 - 250 watts
• Highest performance by using Neodymium- (NdFeB) magnets

S-Program

• Æ 22 - 32 mm
• 6 - 15 watts
• AlNiCo magnets
• Flexible program with many versions

A-Program

• Æ 15 and 20 mm
• 0.8 and 1.2 watts
• AlNiCo magnets
• Designed for optimum manufacturing efficiency the A-Program offers many of the advantages of the S-Program at lower cost.

F-Program

• Æ 30 - 60 mm
• 2.5 - 80 watts
• Ferrite magnets
• Often a very interesting price/performance ratio, in spite of the higher volume-to-power relationship.

Characteristics

• Mechanical commutation (graphite or precious metal brushes)
• Excellent volume/performance ratio
• Highest efficiency
• Low inductance
• No magnetic cogging
• High acceleration thanks to a low mass inertia
• Low electromagnetic interference
• Linear characteristics
• High reliability
• Multiple combination possibilities with gears, feedback devices and control electronics
  

Some applications
Space robots, aircraft seats, packaging systems, conveyors, chip mounting systems etc.

MicroMo Electronics, Inc. announces the addition of two new powerful, ultra-flat DC motors to its product line. The motors are 15 and 26 mm in diameter with a housing length of 5 or 7 mm. The motors possess an outstanding power to volume ratio and can achieve a constant torque of up to 3 mNm and speeds up to 10,000 rpm. The low overall height is enabled by the ironless rotor with three flat, oval coils. The rotor revolves with minimal moment of inertia in an axially aligned neodymium magnetic field, without cogging or iron loss. Because of the precious metal commutation, the transition resistances are low which means that the motor can operate with small starting voltages. As a result, these motors are particularly suitable for battery operated portable devices.

The motors are available as geared motorheads with attached spur gear. With this configuration the constant torque of the drives can be increased up to 100 mNm.

Most versions are immediately available from stock with a 24 - 48 hour turnaround.

For additional information and samples please contact a MicroMo Electronics, Inc. Application Engineer at 800-807-9166 or send an email to info@micromo.com or visit the website at www.micromo.com

About MicroMo Electronics, Inc. and the FAULHABER Group Headquartered in Clearwater, Florida, MicroMo Electronics, Inc. is the North American source for the world's smallest high precision DC drive systems, components, and controls. MicroMo Electronics, Inc. is a member of the FAULHABER Group which offers the world's largest consolidated portfolio of miniature and micro drive system technologies available from one partner in the world today. The Group specializes in the design and manufacture of complex, high precision miniature and micro drive systems for challenging areas of application like medical devices, handling automation, telecommunications, and precision optics.

PSC AC Motors for OEM's Custom configured for each application.

3.3", 42 and 48 frame sizes

1/20 to 1/3 HP

2, 4, or 6 pole = speeds from 1075 to 3450 RPM with 2 and 3 speed windings available

UL & CSA

Thermally protected 100-277 VAC 50/60 HZ

5 different mounting options: tapped holes, foot mount, studs, Ring mount, and resilient base Ball bearing construction

Applications: HAVC: condenser fans, oil burner pumps, draft inducers, heat pumps, unit ventilators, fan coils, dehumidifiers, air purifiers

Pumps: utility, sump, carbonators, industrial, compressors

Refrigeration: display cases, icemakers

Ventilation: bathroom fans, range hoods

Shaded Pole AC Motors for OEM's Custom configured for each application.

3.3", 42 and 48 frame sizes 5 watt to 1/15 HP when run in air. Can be run in Oil at up to ½ HP

2 or 4 pole = speeds from 1550 to 3450 RPM 2 and 3 speed windings available

UL & CSA Thermally protected 100-277 VAC 50/60 HZ

5 different mounting options: tapped holes, foot mount, studs, Ring mount, and resilient base

Ball bearing construction

Applications: HAVC: condenser fans, oil burner pumps, draft inducers, heat pumps, unit ventilators, fan coils, dehumidifiers, air purifiers

Pumps: utility, sump, carbonators, industrial, compressors

Refrigeration: display cases, icemakers

Ventilation: bathroom fans, range hoods