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SM8136A Datasheet(PDF) 7 Page - Nippon Precision Circuits Inc |
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SM8136A Datasheet(HTML) 7 Page - Nippon Precision Circuits Inc |
7 / 15 page SM8136A SEIKO NPC CORPORATION —7 Immediately after startup, the device operates in ×1.5 mode for a fixed interval (soft start time: approximately 2ms) to set the current for LEDs connected to the DIN pins. (1) If the EN signal is input after power is applied, the soft start time begins on the EN rising edge. The EN input signal for dimming is active during the soft start time. (2) The LED drive starts immediately before the end of the LED turn-on delay time. Switching to Standby Mode The SM8136A operating mode switches from ×1.0/×1.5 mode to standby mode if EN goes LOW and stays LOW for an interval of 1.00ms (typ). This function is used to switch the internal circuits to standby mode auto- matically when the LEDs turn OFF in order to reduce current consumption. I When EN is LOW for longer than the CE hold time of 1.00ms (typ), the SM8136A switches to standby mode. In standby mode, the internal circuits are reset, hence the drive current settings must be re-entered to restart the device. Soft start time and LED current Switching to standby mode, and EN hold time EN LED current (1) (2) Soft start time typ: 2ms LED ON Dimming pulse enable VIN VIN High CE hold time typ: 1.00ms EN LED current 1.0 or 1.5 Standby mode |
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Similar Description - SM8136A |
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