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AN1762 Datasheet(PDF) 1 Page - STMicroelectronics |
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AN1762 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 53 page  1/53 AN1762 APPLICATION NOTE December 2003 1 INTRODUCTION The L6205, L6206, L6207 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 L6205, L6206, L6207 block diagrams. Each IC integrates eight Power DMOS plus other added features for safe operation and flexibility. The L6207 also features a constant tOFF PWM current control technique ( Synchronous mode) for each of the two full bridges. Figure 1. L6205 block diagram. D99IN1091A GATE LOGIC OVER CURRENT DETECTION OVER CURRENT DETECTION GATE LOGIC VCP VBOOT ENA IN1A IN2A ENB IN1B IN2B VBOOT 5V 10V VSA V SB OUT1A OUT2A OUT1B OUT2B SENSEA CHARGE PUMP VOLTAGE REGULATOR THERMAL PROTECTION VBOOT VBOOT 10V 10V BRIDGE A BRIDGE B SENSEB OCDA OCDB by Vincenzo Marano L6205, L6206, L6207 DUAL FULL BRIDGE DRIVERS Modern motion control applications need more flexibility that can be addressed only with specialized IC products. The L6205, L6206, L6207 are dual full bridge drivers 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 exter- nal components count to meet requirements for many different applications. |
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