产品名称:

WTC02SP

  • 产品参数
  • 应用秘籍
  • 产品概述
  • 工作电路
  • 参考方案

Operating voltage:

WTC02SP: 3.3V

Output voltage range: GND

Power consumption: 3V is less than 1.6 Ma when full speed working

Sensing thickness (insulating medium): 0-20mm,Maximum: 50mm

(It needs to cooperatively use the different sizes of induction disk)

Response time of effective touch: Less than 100ms

Operating temperature: -40°C—+85°C

Storage temperature: -50°C—+125°C


WTC02SP can be used with single facer and can be applied to various kinds of small home appliances, digital

product, toy and etc.

The single WTC02SP can realize the touch switch and touch adjustment of LED lamp.


WTC02SP is the two-channel capacitive touch-sensitive integrated circuit of high performance low costdesigned for small home appliance and LED touch light and other applications by Wincom Technology. It canreplace the mechanical light touch key to realize waterproof and dustproof, seal isolation, with strong andartistic operation interface. A WTC02SP can achieve 1 to 2 independent keys. The user can use it flexiblyaccording to the needs.


WTC6104BSI Pin Diagram:

WTC02SP (2键 电容感应式触摸按键芯片)

 

 Definitions of Pins:

The definitions of WTC02SP pins are as shown in the table below:

Pin No. Pin NameUsage Function Description
1SW1 |Interface of touch key 1 (sense element 1)
2SW0|Interface of touch key 0 (sense element 0)
3CSEL|Capacitor interface for adjusting the sensitivity
4GND|Power ground
5OS|

Output mode selection

The connected VCC is two keys which is the normal light

touch key mode, and the connected GND OUT0 is the

self-locking key output mode, and OUT1 is the PWM

dimming output

6VCC |Power input
7
OUT0OSW0 status output
8OUT0OSW1 status output


 

Peripheral Circuit and Precautions:

The peripheral circuit of WTC02SP is very simple, and only needs a few resistors and capacitors. The key component is capacitor CSEL for adjusting the sensitivity and IK resistance group for measuring the matched impedance of circuit. CSEL should use 10%-precision polyester capacitor, capacitor made of NOP material or capacitor made of X7R material . 1K resistance group can provide you with the best and most stable measurement effect, and CSEL and matched resistance shall be placed as close as possible to IC at PCB layout.

WTC02SP (2键 电容感应式触摸按键芯片)

                              Figure 4: WTC02SP Application Schematic Diagram

 Output Display:

When the occurrence of effective touch on the sense element is detected, WTC02SP will output the status of corresponding sense element channel within 100ms, so that it can be processed by user MCU, or directly drive the execution circuit to work. WTC02SP has two output modes. It is selected by the VCC or GND of the OS leg of IC.


1. Light touch key mode: pin OS connecting to VCC

When OS I connecting to VCC, the output mode of the general light touch key is used for the corresponding output of WTC02SP SW0 and SW1. After the effective touch is detected on the induction disc, the corresponding indicator pin outputs the low level. After he finger is left, the indicating pin restores the output high level. Taking SW0 channel as an example, the relationship between the output signal and the input channel of the sensor is shown in figure 2

The SW1 channel is the same. When OUT0 and OUT1 are electrified, the initial electrical level is the high level



WTC02SP4

            Figure 2: key output timing diagram of WTC02SP OS when receiving VCC

2. Self-locking switch and PWM dimming mode: pin OS connecting to GND

WTC02SP4

  Figure 3:The SW0 key outputs the sequence diagram when the WTC02SP pin OS is connected to GND

 

相关案例 / Case 更多>>
2017 - 09 - 01
点击次数: 194
1  产品 简介WTC9002N16 是为满足 LED 滑动调光而设计的一款高性能,高可靠的电容式触摸感应芯片滑条芯片,该芯片内部集成了自主设计的 6 通道电容测量电路、自校准电路和 RISC 处理器,为用户提供带 25 级 PWM 输出和 5 档亮度级别显示的触摸感应滑动调光芯片。1.1  技术参数?  满足工业应用规格要求可以为用户提供更可靠的性能,和更宽的应用范...
Copyright ©20015 - 2018 Shenzhen Wincom Electronics Co., Ltd.,
犀牛云提供企业云服务
Tel:0755-26406919
Fax:0755-26403148
Customer serviceQQ:2880484193
Zip:330520
X
3

SKYPE 设置

4

阿里旺旺设置

5

电话号码管理

  • 4006-971-972
6

二维码管理

展开