LB1939T: Motor Driver, Constant Voltage/Current, H-Bridge, 2-Channel
The LB1939T is a bipolar stepping motor driver that features low voltage operation, a low saturation voltage and low power consumption. It operates full/half step drive. It supports constant voltage and constant current drive, can control two iris motors and is optimal for shutter, iris and AF drive in 3V battery operated still digital cameras and other battery operated equipment.
Features- Low voltage drive
- Low saturation voltage output
- Supports constant voltage and constant current drive
- Built-in reference voltage circuit
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Applications- 3V Battery Operated Equipment
| End Products- Digital Still Cameras
- Digital Video Cameras
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Application Notes (1)
Package Drawings (1)
Data Sheets (1)
Evaluation Board Documents (4)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| LB1939TGEVB | Active | Pb-free | EVABOARD FOR LB1939T |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| LB1939T-MPB-E | Last Shipments | Pb-free | TSSOP-20 | 948AX | 3 | Fan-Fold | 70 | |
| LB1939T-TLM-E | Active | Pb-free | TSSOP-20 | 948AX | 3 | Tape and Reel | 2000 | $1.261 |
Specifications
| Product | VM Min (V) | VM Max (V) | VCC Min (V) | VCC Max (V) | IO Max (A) | IO Peak Max (A) | Step Resolution | Control Type | Feedback Method | Current Sense | Regulator Output | Fault Detection | Flyback Protection | RDS(on) Typ (Ω) |
|---|
| LB1939T-TLM-E | 1.6 | 10.5 | 1.9 | 10.5 | 0.4 | | ½ | Parallel | None | External Resistor | Yes | Thermal | Integrated Active | |
