dm134 dm135 dm136
16-bit constant current led drivers
general description
the dm134 dm135 dm136 are constant current drivers specifically designed for led display applications. the value of constant current can be varied using an external resistor. the devices include a 16-bit shift register, latches, and constant current drivers on a single silicon cmos chip.
features
● 5v cmos compatible input
● maximum clock frequency: 25mhz(cascade operation)
● maximum output voltage: 17v
● package: dip24, sop24, ssop24, qfn32,
tssop24-exposedpad(dm135)
● package and pin layout: pin layout and functionality are similar to those of the st2221c(each characteristic value is different.)
● constant current matching（ta=25℃`vdd=5.0v）
chip-to chip:±10.0%
bit-to-bit:
dm134:±4.0% @ iout=30-90ma
±6.0%@iout=20-30ma
dm135:±4.0% @ iout=10-50ma
±6.0%@iout=5-10ma
dm136:±4.0% @ iout=3-15ma
dm114
8位led横流驱动芯片
工作电压3.3v-5v
芯片概述
dm114是专为led显示应用所设计的横流驱动芯片。8个输出通道的电流可由一外挂电
阻调整。内建8比特移位缓存器，数据锁存器，以及横流电路组件于硅cmos芯片上。
芯片特色
● 最大输出承受电压：17v
● 最大时钟频率：25mhz(级联操作)
● 芯片工作电压：3.3v-5.0v
● coms兼容输入
● 封装形式：pdip16, sop16, ssop16
● 封装及管脚定义与通用16脚led横流驱动器st2221a完全兼容（每个特征值不同）
● 恒流性：（ta=25℃`vdd=5.0v）
芯片间输出电流最大差异值：chip-to chip:±10.0%
bit-to-bit:±4.0% @ iout=30-90ma
±6.0%@iout=20-30ma