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AN2836 Datasheet(PDF) 1 Page - STMicroelectronics |
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AN2836 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 57 page  July 2009 Doc ID 15084 Rev 1 1/57 AN2836 Application note L6225, L6226, L6227 dual full-bridge drivers 1 Introduction Modern motion control applications need more flexibility that can be addressed only with specialized IC products. The L6225, L6226, L6227 are dual full-bridge driver ICs specifically developed to drive a wide range of motors. These ICs are one-chip, cost-effective solutions that include several unique circuit design features. These features allow the devices to be used in many applications including DC and stepper motor driving. The principal aim of this development project was to produce easy-to-use, fully-protected power ICs. In addition several key functions such as protection circuit and PWM current control drastically reduce the number of external components to meet requirements for many different applications. The L6225, L6226, L6227 are highly integrated, mixed-signal power ICs that allow the user to easily design a control system for two-phase bipolar stepper motors, multiple DC motors and a wide range of inductive loads. Figure 1 to Figure 3 show the block diagrams of the L6225, L6226, L6227 . Each IC integrates eight power DMOS plus other added features for safe operation and flexibility. The L6227 also features a constant tOFF PWM current control technique (synchronous mode) for each of the two full bridges www.st.com |
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