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发布时间：2007-07-26 浏览：22702次
L6219
Dual Full-Bridge PWM Motor Driver
6219.pdf
Sumzi Electronics Co., Ltd
Features
- Interchangeable with SGS L6219DS
- 750 mA Continuous Output Current
- 45 V Output Sustaining Voltage
- Internal Clamp Diodes
- Internal PWM Current Control
- Low Output Saturation Voltage
- Internal Thermal Shutdown Circuitry
- Similar to Dual PBL3717, UC3770
Description
The L6219DS motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. Both bridges are capable of sustaining 45 V and include internal pulse-width modulation (PWM) control of the output current to 750 mA. The outputs have been optimized for a low output saturation voltage drop (less than 1.8 V total source plus sink at 500 mA).
For PWM current control, the maximum output current is determined by the user's selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0, 33, 67, or 100% of the maximum level. A PHASE input to each bridge determines load current direction.
The bridges include both ground clamp and flyback diodes for protection against inductive transients. Internally generated delays prevent cross-over currents when switching current direction. Special power-up sequencing is not required. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits.
The L6219DS is supplied in a 24-pin surface-mountable SOIC. Its batwing construction provides for maximum package power dissipation in the smallest possible construction. This device is also available on special order for operation from -40°C to +85°C or to +105°C. A leadfree version (100% matte tin leadframe) is also available.
Typical Application
Functional Block Diagram
| Part Number | Package Type | RoHS | Part Composition/ | Temperature |
| Compliant | RoHS Data | |||
| L6219DS | 24-lead SOIC | -- | -- | -20 °C to 85 °C |
| L6219DS-T | 24-lead SOIC | -- | -- | -20 °C to 85 °C |
| L6219DSTR | 24-lead SOIC | -- | -- | -20 °C to 85 °C |
| L6219DSTR-T | 24-lead SOIC | -- | -- | -20 °C to 85 °C |
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