PWM調光機能内蔵 定電流RGB LEDドライバ

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