BS45B2210 Datasheet | Holtek Semiconductor

Description The BS45B2210 is a capacitive LED Lighting Touch IC, which supports one-channel touch input and two-channel PWM output. This device can configure 7 light control modes and sensitivity adjustment test mode by configuring pins, which can meet the requirements of different situations. This device adopts a special integrated circuit internally, which has a high power supply rejection ratio and can reduce the occurrence of key detection errors. This feature ensures that the device still has high reliability in applications under adverse environmental conditions. It has the advantages of low power consumption, high anti-interference and instant use after power on. Features - Operating voltage: 2.2V~5.5V - Sleep current about 2.5μA@3V - Reliable one-channel touch input - Maximum key pressed duration time detection: 32s - Multiple optional modes: OPTION1~3 - Two-channel PWM output, frequency 31.25k Hz Pin Assignment TOUCHKEY OPTION1 OPTION2 OPTION3 BS45B2210 8 SOP-A VDD VSS PWM1 PWM2 Pin Description Pin Name TOUCHKEY OPTION1 OPTION2 OPTION3 PWM2 PWM1 VSS VDD Pin No. 1 2 3 4 5 6 7 8 Type Input Input Input Input Output Output - - Description Touch key input pin Mode selection pin 1 Mode selection pin 2 Mode selection pin 3 Light adjustment, PWM2 output Light adjustment, PWM1 output Ground Supply voltage Rev. 1.00 May 10, 2024 BS45B2210 LED Lighting Touch IC Functional Introduction The TOUCHKEY touch input corresponds to PWM light control output, and the LED light switch and brightness change are controlled by adjusting the PWM output signal duty. The frequency of PWM signal is fixed at 31.25k Hz, and there are 8 modes for selection, which are determined by the input status of OPTION1, OPTION 2 and OPTION 3 pins after power on. The device OPTION pin has an internal pull-up resistor, which is 1 when floating and 0 when connecting to GND, as follows: Mode OPTION3 OPTION2 OPTION1 Function...