Rohm Productdetail
车载用低Duty LCD段码驱动器_BU97550KV-M
BU97550KV-M是1/8、1/7、1/5、1/4、1/3占空比、Static车载用通用LCD驱动器，最多可显示528段LCD。
本产品支持高液晶电压驱动及高帧频率驱动，也可驱动高显示精度的VA液晶。最多可控制9个通用／WM输出，通过丰富的频率设定功能，无需频闪即可实现LED背光和LED按钮的照明。还内置最多30键的键盘扫描功能，可实现PCB上的配线削减和MCU的尺寸缩减和成本削减。内置有EVR功能，可进行LCD对比度的调节，还支持TTL电平输入，因此能直接连接各种电源电压的MCU。
特性：
Grade
Automotive
Segment Element
528
Duty
1/8, 1/7, 1/5, 1/4, 1/3, Static
Bias
1/4, 1/3, 1/2
Elements of MUX 1:1
70
Elements of MUX 1:3
210
Elements of MUX 1:4
280
Elements of MUX 1:5
345
Elements of MUX 1:8
528
Interface [line serial]
3wire+KEYOUT
Interface Voltage (Min.)[V]
2.7
Interface Voltage (Max.)[V]
6.0
Power Supply for LCD (Min.)[V]
2.7
Power Supply for LCD (Max.)[V]
6.0
Max GPO [port]
9
Max KEYSCAN [Key]
30
TTL input Support
Yes
LCD Driving Waveform
Line/Frame
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
85
特点：
- 1/8, 1/7, 1/5, 1/4, 1/3duty or Static setting selectable
1/8duty driving: Max 528 segments
1/7duty driving: Max 469 segments
1/5duty driving: Max 345 segments
1/4duty driving: Max 280 segments
1/3duty driving: Max 210 segments
Static driving: Max 70 segments - 1/4, 1/3 or 1/2 bias setting selectable
- Support wide range of operation voltage from 2.7V to 6.0V,
which can support TN LCD and VA LCD display. - Integrated LCD voltage driving circuit
- Integrated oscillation circuit for LCD frame frequency
- Line or Frame inversion driving selectable
- Integrated 9ch general purpose outputs/ PWM outputs (SEG selectable)
- Support 256 step PWM function to realize backlight/ button LED illumination
- Support LCD frame frequency from 49Hz to 391Hz, total 16setting
- Support PWM frequency from 146Hz to 2.34KHz, total 16setting
- Support 3 wire serial interface + KEYOUT
- Support TTL level input to connect 3.3V MCU directly
- Support Max 30 key input detection (SEG selectable)
- Integrated EVR function to adjust LCD contrast
- Integrated voltage detected type power on reset circuit
- No external components required
- Low power consumption design
- Qualified AEC-Q100 Grade3