TPS61185 具有 PWM 控制接口的用于笔记本电脑的 2A WLED 驱动器

TPS61185 描述

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
Topology	Boost
Type	Inductive
Vin(Min)(V)	4.2
Vin(Max)(V)	24
Switch Current Limit(Typ)(A)	2
Output Voltage(Max)(V)	38
Switching Frequency(Max)(kHz)	2000
LED(#)	10
LED Configuration	Series
Over-Voltage Protection(Min)(V)	37
Peak Efficiency(%)	90
Iq(Typ)(mA)	2
Operating Temperature Range(°C)	-40 to 85
Pin/Package	24VQFN

TPS61185 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
• APPLICATIONS

TPS61185 芯片订购指南

器件	状态	温度	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
TPS61185RGER	ACTIVE	-40 to 85	1.80 | 1ku	VQFN (RGE) | 24	3000 | LARGE T&R
TPS61185RGET	ACTIVE	-40 to 85	2.10 | 1ku	VQFN (RGE) | 24	250 | SMALL T&R

TPS61185 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
TPS61185RGER	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS61185RGER	TPS61185RGER
TPS61185RGET	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS61185RGET	TPS61185RGET

TPS61185 应用技术支持与电子电路设计开发资源下载

1. TPS61185 数据资料 dataSheet 下载.PDF
2. TI 德州仪器照明解决方案产品选型与价格 . xls
3. 照明和显示屏电源选择指南 (PDF 1427 KB)
4. 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
5. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A) (PDF 2206 KB)
6. PowerPADTM Made Easy (PDF 57 KB)
7. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
9. 所选封装材料的热学和电学性质 (PDF 645 KB)
10. 高速数据转换 (PDF 1967 KB)

TPS61185 相关工具

名称	型号	公司	工具/软件类型
TPS61185 评估模块	TPS61185EVM	Texas Instruments	开发电路板/EVM
TPS61185 评估模块	TPS61185EVM-259	Texas Instruments	开发电路板/EVM
用于 TPS61185 2A WLED 驱动器 IC 的评估模块	TPS61185EVM-335	Texas Instruments	开发电路板/EVM