LB11873: Three-Phase Brushless Motor Driver for Polygonal Mirror Motors
The LB11873 is a 3-phase brushless motor driver developed for driving the polygonal mirror motor used in plain-paper copiers and similar products. This IC can implement the circuits required for polygonal mirror motor drive (speed control and driver circuits) in a single chip. The LB11873 implements low-noise/low-vibration PWM drive by changing the current at phase switching gradually to reduce motor noise.
Features- Three-phase bipolar drive (quiet direct PWM)
- PLL speed control circuit
- Hall sensor FG support
- Dedicated external clock
- Brake mode switching circuit (free running and reverse braking)
- Phase lock detection output (with masking function)
- Built-in current limiter, constraint protection, undervoltage protection, thermal protection, and CLK line disconnection protection circuits
- Input pins support 3V system microcontrollers
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Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| LB11873-MPB-E | Last Shipments | Pb-free | HSOP-36 | 943AC | 3 | Fan-Fold | 20 | |
| LB11873-TRM-E | Active | Pb-free | HSOP-36 | 943AC | 3 | Tape and Reel | 1000 | $1.4666 |
Specifications
| Product | Phase | VM Min (V) | VM Max (V) | VCC Min (V) | VCC Max (V) | IO Max (A) | IO Peak Max (A) | Control Type | Current Sense | Regulator Output | Fault Detection |
|---|
| LB11873-TRM-E | 3 | 9.5 | 28 | 9.5 | 28 | | 1.8 | Clock | External Resistor | Yes | Over-Current |
