The TPS92551 Constant Current Buck LED Driver Micro-Module drives maximum 450mA LED current up to 16 LEDs in a single string (maximum 23W). It integrates all the power components including the power inductor. The TPS92551 provides a full turn-key, highly efficient solution for wide range of single string LED lighting applications with up to 95% power efficiency. It accepts an input voltage ranging from 4.5V to 60V and delivers a 350mA LED current as default. The LED current is adjustable from 300mA to 450mA by charging a single external resistor.

The module operates at constant switching frequency (800kHz) with low Electro Magnetic Interference(EMI) complying with EN55015 standard. The module has fast control loop to realize fine LED current pulse yielding 256–step PWM dimming resolution at 240Hz for general lighting. Protection features include thermal shutdown, input under-voltage lockout, LED open-circuit and short-circuit protections. The TPS92551 Micro-Module is available in 7-pin PFM power package.

• Integrated All Power Components Including the Power Inductor
• Wide Input Voltage Range : 4.5V - 60V
• Constant Switching Frequency at 800kHz
• High Contrast Ratio (Minimum Dimming Current Pulse width < 16μs)
• Drives up to 16 LEDs in series at 60V input
• ±3.5% Typical LED Current Accuracy
• LED Current Adjustable from 300mA to 450mA
• Up to 95% Efficiency
• TPS92551 Modules can be Connected in Parallel for Higher Current Operation
• Input Under-Voltage Lock-Out (UVLO)
• Compatible with Ceramic and Low ESR Capacitors
• Low Electro Magnetic Interference (EMI) Complies with EN55015 Standard EN55015, refer to and
• LED Open and Short Circuit Protections
• Thermal Shutdown and RoHS Compliant
• -40?C to +125?C Junction Temperature Range

Package Highlights

• 7-Lead Easy-to-Use Package (Similar to TO-263)
• Single Exposed Die Attach Pad for Enhanced Thermal Performance
• 10.2 x 13.8 x 4.6 mm Package

All trademarks are the property of their respective owners.

• Input voltage (type)
• DC/DC
• Topology
• Buck
• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 60
• Iout (Max) (A)
• 0.45
• Iq (Typ) (mA)
• 2.65
• Features
• Enable/Shutdown, Integrated Switch, Thermal Shutdown
• Operating temperature range (C)
• -40 to 125
• Dimming method
• Analog, PWM

TPS92551的完整型号有：TPS92551TZ/NOPB、TPS92551TZX/NOPB，以下是这些产品的关键参数及官网采购报价：

TPS92551TZ/NOPB，工作温度：-40 to 125，封装：TO-PMOD (NDW)-7，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网TPS92551TZ/NOPB的批量USD价格：3.902（1000+）

TPS92551TZX/NOPB，工作温度：-40 to 125，封装：TO-PMOD (NDW)-7，包装数量MPQ：500个，MSL 等级/回流焊峰值温度：Level-3-245C-168 HR，引脚镀层/焊球材料：SN，TI官网TPS92551TZX/NOPB的批量USD价格：3.252（1000+）

TPS92551 PSpice Transient Model

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)