TM1814 is four channels LED constant current adjustable driver IC with function of internal control
synchronizing, which can achieve a wide range of display as MCU inputs one group of data set by constant
current and PWM to TM1814. When input signal is disconnected, it can realize synchronized fixation of
colorful pattern change and prevent in-operation of subsequent cascade chip caused by chip damage. Internal
chip is integrated with MCU solidification program and single wire digital interface, data flip-latch, LED
constant current driver, circuit, etc. Internal VDD pin is integrated with 5V regulator with less peripheral
devices, which applies to guardrail tube, point source and LED decorative products. This product has excellent
performance and reliable quality.
Features
Adopt power CMOS technology
Withstand voltage of OUT output port is 32V
5 V voltage-regulator tube is built into VDD, and the voltage supports 6-24 V after cascading the
resistor
Constant current can achieve level 64 adjustment (6.5 mA-38mA)
PWM brightness controls circuit, and 256 brightness is adjustable
Accurate current output value
Maximum error (between channels): ±3%
Maximum error (between chips): ±5%
Single line serial concatenated port
Oscillation mode: build in RC vibration and conduct clock synchronization according to signals on
data line. After receiving the data from this unit, it can reproduce follow-up data and send it to lower
level through data output end, and signals will not be distorted and reduced along with cascade
Build in power on reset circuit, and after powering on reset, all registers are initialized to zero
External control mode data transmission rate is 800 KHZ
Internal control mode data transmission rate is 500 KHZ
Internal control mode chip sends 2048 points of data
Encapsulation mode: SOP8 #CommonPartsLibrary #IntegratedCircuit
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