各ch独立したPWM調光機能搭載による細やかな色制御を実現 Independent Dimming for each Channel Ensures Smooth Color Control PWM調光機能内蔵 定電流RGB LEDドライバ Constant Current RGB LED Driver with PWM Dimming Function BD2808MUV-M Features ●各ch独立した8bitPWM調光機能とRGB専用の 6bit電流DAC搭載により滑らかな電流制御を実現 Independent 8bit PWM dimming function for each channel and 6bit RBG current DACs enable smooth, precise current control ●8グループのPWM分散制御機能とSlow Slew Rate 機能 により低ノイズを実現 Low noise achieved through a slow slew rate function and 8-group distributed control ●アドレス選択機能によりICを最大64pcs並列制御可能 Address selection function makes it possible to control up to 64 units in parallel Applications ●車載クラスターパネル向けインジケータ Indicators for cluster panels VQFN48MCV070 ●車載RGB LEDモジュールおよびディスプレイ Automotive RGB LED modules and displays ●その他車載LED装飾機能 Other automotive LED-equipped systems Block Diagram Electrical Characteristics パワーオンリセット/ サーマルシャットダウン 機能内蔵 各Ch独立した8bit PWM調光機能内蔵+6bit RGB用 電流DAC内蔵により、マイコン負荷の低減を実現! ピュアホワイト&きめ細やかな色制御を実現 Built-in Power ON Reset and Thermal Shutdown functions Independent 8bit PWM dimming function for each channel and 6bit RGB current DACs lighten MCU load while enabling pure white illumination and smooth color control VCC POR TSD 1μF/10V 高精度LED電流マッチング:±3%(18mA設定時) VLED VREF 2線シリアルI/F OSC High accuracy LED current matching : ±3% (18mA setting) CLK 各チャネル独立 8bit PWM調光機能 (疑似Logカーブ) SDI Built-in independent 8bit PWM dimming function for each channel (pseudo log curve) SDO I/O EN信号 EN Signal Digital Control OE OUTB0 OUTR1 OUTG1 R用電流設定 Current setting for RED OUTB1 G用電流設定 Current setting for Green A1 デバイスアドレス選択 OUTG0 6bit DAC A0 Device Address selection terminals (6bit = 64pcs Max.) 90 OUTR0 2-Wire Serial I/F On/Off 輝度変化が見えやすい Duty 領域では 1/512step で制御 (%) 100 6bit DAC A2 A3 B用電流設定 Current setting for Blue A4 OUTR6 6bit DAC A5 OUTG6 OUTB6 LED Brightness (PWM Duty) VCC OUTR7 OUTG7 XERR 1/512 step control in the easily visible brightness region 一般的な 8bit 調光 Duty 変化ライン (Linear) General 8bit dimming duty change line (linear) 80 70 1 / 512 step 60 50 40 2 / 512 step 輝度変化が見えにくい Duty 領域では 4/512step で制御 Achieve smoother current control 4/512 step control in the less visible brightness region 30 20 BD2808MUV-M 搭載の 8bit 疑似 Log 調光時の Duty 変化ライン 10 BD2808MUV-M duty change line during 8bit pseudo log dimming OUTB7 0 0 64 128 192 256 8bit PWM Dimming (256 Steps) PGND PGND ISET PGND AGND AGND Built-in 6bit current DAC function (3 groups for R/G/B) ISET 6bit電流DAC機能搭載(R/G/B用の3グループ) 4 / 512 step よりきめ細やかな 電流制御を実現 !! Lineup Part No. ☆ BD2808MUV-M Supply Voltage (V) 3.0 to 5.5 Output Voltage (V) 20 No. of Output (ch) RGB × 8 (24ch) Output Method Constant Current Max. LED Current 50mA / ch Output Format Other Output Format Built-in 64-step Built-in 256 step PWM current DAC for RGB control for all channels Control Method Max. Clock Frequency 2-Wire Serial 1.0MHz Package VQFN48MCV070 ☆ : Under development
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