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LB1928 Datasheet(PDF) 6 Page - Sanyo Semicon Device |
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LB1928 Datasheet(HTML) 6 Page - Sanyo Semicon Device |
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6 / 11 page  LB1928 No. 6198-6/11 Pin number 28 1 2 3 5 4 6 7 8 9 10 Pin name OUT1 OUT2 OUT3 GND2 VM VCC VREG PWM CSD XI XO Equivalent circuit Pin Description Pin function Motor drive output pins. Connect a Schottky diode between these outputs and VCC. Output ground pin. Output block power supply and output current detection pin. Connect a resistor (Rf) between this pin and VCC to detect the output current as a voltage. The output current is limited according to the equation IOUT = VRF/Rf. Power supply pin (except for output block) Regulated power supply output pin (5V output) Connect a capacitor (approx. 0.1 µF) between this pin and ground to stabilize the output. PWM frequency setting pin. Connect a capacitor between this pin and ground. C = 3900 pF results in a frequency of about 18 kHz. Lock protection circuit operation time setting pin. Connecting a capacitor of about 10 µF between this pin and ground results in a protection circuit operation time of about 3.3 seconds. Quartz oscillator pins. Connect to quartz oscillator to generate the reference clock. When an external clock (of several MHz) is used, the clock signal should be input via a resistor of about 5.1 k Ω connected in series with the XI pin. In this case, the XO pin must be left open. Continued on next page 5 3 1 2 28 VCC 300 Ω VM A12983 6 VCC A12984 7 200 Ω 2k Ω VREG A12985 10 9 VREG A12987 8 300 Ω 1k Ω VREG A12986 |
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