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LB1980H Datasheet(PDF) 5 Page - Sanyo Semicon Device |
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LB1980H Datasheet(HTML) 5 Page - Sanyo Semicon Device |
5 / 7 page LB1980H No.5974-5/7 Pin Function Pin No. Pin Name Function Equivalent circuit 27 28 1 UOUT VOUT WOUT U phase output, Spark killer diodes are built-in. V phase output, Spark killer diodes are built-in. W phase output, Spark killer diodes are built-in. 4 5 Rf (SENSE) Rf (PWR) Output current detection. The control block current limiter operates using the resistor Rf connected between these pins and ground. Also, the lower side saturation prevention circuit and the torque ripple correction circuit operate based on the voltages across this resistor. It is especially important to note that, since the saturation prevention level is set using this voltage, the lower side saturation prevention circuit will become less effective in the high current region if the value of Rf is lowered excessively. Also, the PWR and SENSE pins must be connected together. 22 VS Output block power supply 150 µA VS VCC OUT Rf (PWR) Rf (SENSE) 30k Ω 200 Ω 200 Ω Lower side saturation prevention circuit input block 10 µA VCC 22 1 28 27 24 4 5 GSENSE Ground sensing. The influence of the common ground impedance on Rf can be excluded by connecting this pin to nearest ground for the Rf resistor side of the motor ground wiring that includes Rf. (This pin must not be left open.) 6 FR Forward / reverse selection. The voltage applied to this pin selects the motor direction (forward or reverse). (Vth=2.5V at VCC=5V (typical)) 23 ADJ Used for external adjustment of the torque ripple correction ratio. Apply a voltage externally with a low-impedance circuit to the ADJ pin to adjust the correction ratio. The correction ratio falls as the applied voltage is increased, and increases as the applied voltage decreases. The torque ripple correction ratio can be modified by factors in the range 0 to 2 times the ratio that applies when his pin is left open. (The pin voltage is set to about VCC / 2 internally, and the input impedance is about 5k Ω.) 200 µA VCC VCC VCC VCC FR 200 Ω 1/2 VCC 10k Ω 10k Ω 6k Ω 6k Ω 500 Ω 10k Ω 10k Ω ADJ 20 µA 6 23 7 GND Ground for all circuits other than the output transistors. The lowest potential of the output transistors is that of the Rf pin. 8 FGIN- Input used when the FG amplifier is used as an inverting input. A feedback resistor must be connected between FGOUT and this pin. 9 FGIN+ Non-inverting input used when the FG amplifier is used as a differential input amplifier. No bias is applied internally. 5 µA VCC 300 Ω FGIN(+) FGIN(−) 300 Ω 8 9 10 FGOUT FG amplifier output. There is an internal resistive load. 14 FC Speed control loop frequency characteristics correction. VCC VCC FC 10k Ω 2k Ω VCC FGOUT 300 Ω 14 10 Continued on next page. |
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