基于TPS61185设计的高度集成大尺寸LCD背光技术
本文介绍tps61185主要特性,方框图以及多种典型应用电路.
tps61185是ti 公司的高度集成大尺寸lcd背光解决方案.器件包括内置的高效率升压稳压器和2.0a/40v功率mosfet.8个电流沉稳压器具有高精度的电流稳流和匹配(1%),支持多达80个led,每串串联多达10个led.输入电压4.5v -21v, 开关频率600khz 到1mhz,可调光频率从100 hz 到5 khz,主要用在笔记本电脑lcd显示器背光.
the tps61185 ic provides highly integrated solutions for large-size lcd backlighting. this device has a built-in high efficiency boost regulator with integrated 2 a/40 v power mosfet. the eight current sink regulators provide high precision current regulation and matching. in total, the device can support up to 80 leds. in addition, the boost output automatically adjusts its voltage to the wled forward voltage to improve efficiency.
the tps61185 supports the pwm method for brightness dimming. simply tie the unused current sinks to ground if fewer than eight are needed. during pwm dimming, each of the eight current regulators is turned on/off at the duty cycle determined by an external pulse width modulation (pwm) signal input to the pwm pin.
tps61185主要特性:
4.2 v to 24 v input voltage
integrated 2 a/40 v mosfet
600 khz to 2 mhz programmable switching frequency
adaptive boost output for best efficiency
design to use small l-c components
integrated loop compensation
eight 25 ma current sinks
up to 10 wled in series
1% current matching and accuracy
pwm brightness interface control
200 mv ripple under pwm dimming
driver for input/output isolation pfet
programmable over voltage threshold
100 hz to 5 khz programmable pwm dimming frequency
up to 20 khz direct pwm dimming frequency
enhanced electrostatic discharge immunity level
built-in wled open/short protection
over temperature protection
24 pin 4 mm × 4 mm qfn package
tps61185应用:
• notebook lcd display backlight
图1.tps61185方框图
图2.tps61185典型应用电路图
图3.tps61185带关断iso-fet的典型应用电路图
图4.tps61185可编频率调光的典型应用电路图
图5.tps61185 6串led的典型应用电路图
图6.tps61185 46串40ma led的典型应用电路图
rj45接口是什么?rj45接口有什么用
PY32 系列单片机开发常见问题解答
MAX2981 集成电力线通信模拟前端收发器和线驱动器
特斯拉升级来了 特斯拉2021款Model 3升级的全部项目介绍
5G+车联网 让惬意在公路上挥洒
基于TPS61185设计的高度集成大尺寸LCD背光技术
边缘计算在云和嵌入式世界之间架起了桥梁
台佑电子：迈进全电动立式注塑机行业的蓝海
Facebook 将自行开发、可支持自家 AI 程序的定制「ASIC」芯片
蓝牙midi和蓝牙音频或者蓝牙audio有什么区别呢
2010年国内家居照明市场将稳健上升
OPPO与联发科紧密合作的忧患
浅谈汽车连接器的性能
硬件错误侦测
中国汽车品牌在全球汽车行业中的价值表现
基于DSP和FPGA的机器视觉系统设计与实现
工信部公示物联网安全标准五大项目
市值蒸发近3000亿，又一家互联网巨头陨落，原因让人不解
5G时代，多端口器件测试面临哪些挑战？
小米平板3发布：超大电池联发科处理器，或推Pro版本可运行win10
tps61185是ti 公司的高度集成大尺寸lcd背光解决方案.器件包括内置的高效率升压稳压器和2.0a/40v功率mosfet.8个电流沉稳压器具有高精度的电流稳流和匹配(1%),支持多达80个led,每串串联多达10个led.输入电压4.5v -21v, 开关频率600khz 到1mhz,可调光频率从100 hz 到5 khz,主要用在笔记本电脑lcd显示器背光.
the tps61185 ic provides highly integrated solutions for large-size lcd backlighting. this device has a built-in high efficiency boost regulator with integrated 2 a/40 v power mosfet. the eight current sink regulators provide high precision current regulation and matching. in total, the device can support up to 80 leds. in addition, the boost output automatically adjusts its voltage to the wled forward voltage to improve efficiency.
the tps61185 supports the pwm method for brightness dimming. simply tie the unused current sinks to ground if fewer than eight are needed. during pwm dimming, each of the eight current regulators is turned on/off at the duty cycle determined by an external pulse width modulation (pwm) signal input to the pwm pin.
tps61185主要特性:
4.2 v to 24 v input voltage
integrated 2 a/40 v mosfet
600 khz to 2 mhz programmable switching frequency
adaptive boost output for best efficiency
design to use small l-c components
integrated loop compensation
eight 25 ma current sinks
up to 10 wled in series
1% current matching and accuracy
pwm brightness interface control
200 mv ripple under pwm dimming
driver for input/output isolation pfet
programmable over voltage threshold
100 hz to 5 khz programmable pwm dimming frequency
up to 20 khz direct pwm dimming frequency
enhanced electrostatic discharge immunity level
built-in wled open/short protection
over temperature protection
24 pin 4 mm × 4 mm qfn package
tps61185应用:
• notebook lcd display backlight
图1.tps61185方框图
图2.tps61185典型应用电路图
图3.tps61185带关断iso-fet的典型应用电路图
图4.tps61185可编频率调光的典型应用电路图
图5.tps61185 6串led的典型应用电路图
图6.tps61185 46串40ma led的典型应用电路图
rj45接口是什么?rj45接口有什么用
PY32 系列单片机开发常见问题解答
MAX2981 集成电力线通信模拟前端收发器和线驱动器
特斯拉升级来了 特斯拉2021款Model 3升级的全部项目介绍
5G+车联网 让惬意在公路上挥洒
基于TPS61185设计的高度集成大尺寸LCD背光技术
边缘计算在云和嵌入式世界之间架起了桥梁
台佑电子：迈进全电动立式注塑机行业的蓝海
Facebook 将自行开发、可支持自家 AI 程序的定制「ASIC」芯片
蓝牙midi和蓝牙音频或者蓝牙audio有什么区别呢
2010年国内家居照明市场将稳健上升
OPPO与联发科紧密合作的忧患
浅谈汽车连接器的性能
硬件错误侦测
中国汽车品牌在全球汽车行业中的价值表现
基于DSP和FPGA的机器视觉系统设计与实现
工信部公示物联网安全标准五大项目
市值蒸发近3000亿，又一家互联网巨头陨落，原因让人不解
5G时代，多端口器件测试面临哪些挑战？
小米平板3发布：超大电池联发科处理器，或推Pro版本可运行win10