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AM4961AGHTR-G1 データシート(PDF) 9 Page - Diodes Incorporated |
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AM4961AGHTR-G1 データシート(HTML) 9 Page - Diodes Incorporated |
9 / 17 page AM4961A Document number: DS36626 Rev. 1 - 2 9 of 17 www.diodes.com October 2013 © Diodes Incorporated AM4961A A Product Line of Diodes Incorporated Applications Note Typical Application Circuit for PWM input signal for speed control with AM4961A is shown below. The speed is primarily controlled by a voltage on the VPWM pin (either from DC voltage signal or PWM inputs signal converted to DC voltage) or alternatively a PWM signal on COSC pin. OUT2 OUT1 VCC GND VMIN CT VPWM VREF COSC HIN- FG HB RD HIN+ Hall AM4961A D1 C1 1 µF or greater R1 27k R2 10k R4 39k R6 330k R7 100k R5 100k PWM VCC L1 R3 7.5k R8 68k C2 0.33 µF C3 100pF C4 0.47 µF 1 (1) 2 (3) 3 (4) 4 (5) 5 (6) 6 (7) 7 (8) 8 (9) 9 (10) 10 (11) 11 (12) 12 (13) 13 (14) 14 (15) PGND (16) Q1 Typical Application Circuit – External PWM Input Speed Control Note: 9. C1 is for power stabilization and should be 1uF or higher depending on the motor current and motor design. Power Supply Stabilization The recommended operating voltage range for AM4961A is 3.5V to 16V. A decoupling capacitor C1 (which also acts as re-circulating capacitor at commutation) should be connected close to the VCC pin. C1 is for power stabilization and should be 1µF or higher depending on the motor current and motor design. Hall Bias and Hall Input for Commutation Signal The HB pin provides a 1.25V Hall bias voltage to drive Hall element. The output of the Hall elements or the Hall switches connect to Hall input H+ and H- pin as described previously in functional description section. To avoid noise, the connection to the Hall element or switch should be as short as possible. The Hall input stage (H+ and H- pin) has a hysteresis of 20mV typical. The differential Hall input signal should be 50mV peak or higher. Output PWM Frequency Setting – CSOSC Capacitor The output PWM frequency is generated by comparing VPWM or VMIN (whichever is lower) to the triangular wave on the COSC pin. See “Speed Control and Minimum Speed Setting” figure. The triangular wave is generated at the COSC pin when a capacitor C3 is connected between it and the ground. The triangular wave has high level of 0.3VCC typical and low level voltage of 0.16VCC typical. For 12V nominal supply these two levels are 3.6V and 1.95V typically. The capacitor C3 of 100pF at COSC pin provides output PWM frequency of 25kHZ typical. The C3 capacitor should be connected close to the COSC pin. |
同様の部品番号 - AM4961AGHTR-G1 |
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同様の説明 - AM4961AGHTR-G1 |
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