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橫流驅動芯片

工作電壓3.3v-5v

芯片概述

   dm114是專為led顯示應用所設計的橫流驅動芯片。8個輸出通道的電流可由一外掛電

阻調整。內建8比特移位緩存器，數據鎖存器，以及橫流電路組件于硅cmos芯片上。

芯片特色

●          最大輸出承受電壓：17v

●          最大時鐘頻率：25mhz(級聯操作)

●          芯片工作電壓：3.3v-5.0v

●          coms兼容輸入

●          封裝形式：pdip16, sop16, ssop16

●          封裝及管腳定義與通用16腳led橫流驅動器st2221a完全兼容（每個特征值不同）

●          恒流性：（ta=25℃`vdd=5.0v）

芯片間輸出電流最大差異值：chip-to chip:±10.0%

                                      bit-to-bit:±4.0% @ iout=30-90ma

                                                 ±6.0%@iout=20-30ma