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TD340ID Datasheet(PDF) 9 Page - STMicroelectronics |
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TD340ID Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 21 page TD340 9/21 Figure 3 : Synchronous Rectification Principle Table 1 : Function Table in Digital and Analog Modes Notes: - Standby state is active when STB Y pin is pulled low - Disable state is active when one of the following conditions is met: UVLO, OVLO, Reset, Watchdog Timeout. Stby State Disable State IN1 (V) IN2 (V) Mosfets Status Comments digital analog Q1L Q1H Q2L Q2H 1 X X X X OFF OFF OFF OFF Motor Off in Standby Mode X 1 X X X OFF OFF OFF OFF Motor Off in Disable Mode 0 0 0 idle 0 to 1.2 0 ON OFF ON OFF Motor Brake Low 0 0 0 idle 0 to 1.2 5 OFF ON OFF ON Motor Brake High 0 0 PWM 1.2 to 3.6 0 OFF ON PWM !PWM Motor x% Forward 0 0 PWM 1.2 to 3.6 5 PWM !PWM OFF ON Motor x% Backward 0 0 5 idle 3.6 to 5 0 OFF ON ON OFF Motor 100% Forward 0 0 5 idle 3.6 to 5 5 ON OFF OFF ON Motor 100% Backward ex1: Speed: PWM=x% No synchronous rectification HIGH DISSIPATION THROUGH FREE WHEEL DIODE! M PWM FULL FULL x% 1-x% FULL ON OFF OFF ex2: Speed: PWM=x% With synchronous rectification - TD340 LOW DISSIPATION THROUGH LOW Rdson! M PWM FULL FULL x% 1-x% PWM ON OFF |
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