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HV892 Datasheet(PDF) 4 Page - Sirectifier Semiconductors |
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HV892 Datasheet(HTML) 4 Page - Sirectifier Semiconductors |
4 / 6 page 4 HV892 Applications Information I2C The HV892 is a write-only fast mode I2C device. Logic voltages are referenced to V DD. Address The HV892 recognizes a 7-bit address. The device is pre-programmed with an I2C address of 0100011b. For other ad- dresses, please contact the factory. Data A single byte written to the HV892 controls the operation of the lens driver. See the Command Table below. The MSB is clocked-in first. Command Table AMP Description 00h Low power standby mode. When in standby mode, the internal boost converter and H-bridge oscillator are shut down, and the OUT pins are held at ground. Any AMP value other than 00h brings the HV892 out of standby mode. The time it takes the HV892 to exit standby mode and achieve full output amplitude is less than 20ms with a 4.7nF capacitor on the HV pin. Faster startup times may be achieved by lowering C HV at the expense of possible waveform distortion. 01h-FFh Controls output amplitude according to: V OUT(RMS) = 9.8VRMS + AMP • 205mVRMS Supplies V IN should be ramped up in less than 2.0ms to assure the driver starts-up in standby mode. If brought up slower, the driver may not start-up in standby mode, with output amplitude at an indeterminate level. In this case, writing AMP = 00h brings the driver to standby mode. No damage will occur if ramped slower than 2.0ms. Output Waveform DX 1 / fOUT dV/dt (all edges) AMP=FFh AMP<FFh DX |
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