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SM8135BB Scheda tecnica(PDF) 8 Page - Nippon Precision Circuits Inc |
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SM8135BB Scheda tecnica(HTML) 8 Page - Nippon Precision Circuits Inc |
8 / 19 page SM8135B SEIKO NPC CORPORATION —8 Immediately after startup, the device operates in ×1.5 mode for a fixed interval (soft start time: approximately 1.43ms) to set the current for LEDs connected to the DIN pins. After the soft start time has elapsed, the LEDs are turned ON. Approximately 2ms is required for the LED drive current to reach the set drive value. (1) If the EN signal is input after power is applied, the soft start time begins on the EN rising edge. The DIM pulse input for dimming is active during the soft start time. (2) After the soft start time (1.43ms) has elapsed, the LEDs are turned ON. Approximately 2ms is required for LED drive current to reach set values. Switching to Standby Mode The SM8135B switches from ×1.0/×1.5/×2.0 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 automatically when the LEDs turn OFF in order to reduce current consumption. I If EN is LOW for longer than the enable hold time of 1.00ms (typ), the SM8135B 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 input signal LED current (1) (2) typ: 1.43ms Soft start time LED ON typ: 2ms CE hold time typ: 1.00ms EN LED current 1.0 or 1.5 Standby mode |
Codice articolo simile - SM8135BB |
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