美国芯源系统股份有限公司(Monolithic Power System Inc.，下称MPS)成立于1997年，是美国一家专门从事高性能数模混合半导体芯片设计、开发、制造和销售的公司。总部位于美国加利福尼亚州硅谷，2004年11月在纳斯达克成功上市。MPS电源芯片具有高集成度，小体积，高效率，易开发的特点。随着环保意识的增强，市场的兴起，MPS推出了一系列针对LED市场的升降压电源管理芯片。

Parts：
1. MP2370DJ-LF-Z 应用于MR16规格上，DC-DC转换。
2. MP2483DQ-LF-Z 应用于，路灯等，可做升降压转换。
3. MP2488DN-LF-Z 应用于60V Vin内路灯系统，DC-DC转换。

产品规格：
1. MP2370DJ-LF-Z for MR16

2. Features：
a. DC12V input, driver 1 WLED or 2 WLEDs
b. 1.2A, 24V, 1.4MHz Step-Down White LED Driver
c. 0.35  Internal Power MOSFET Switch
d. 0.1 A Shutdown Mode
e. Fixed 1.4MHz Frequency
f. Short and Open protection.
g. 0.15V Sense Voltage
h. TSOT23-6 Package

产品说明： 
    The MP2370 is a monolithic step-down white,LED driver with a built-in power MOSFET.It achieves 1.2A peak output current over a wide input supply range with exclent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown.

产品应用：
1. WLED Drivers
2. Distributed Power Systems
3. Battery Charger
4. Pre-Regulator for Linear

产品规格：
1. MP2483DQ-LF-Z Boost-Buck

2. Features
a. Unique Step-up/down Operation
b. Wide 4.5V to 55V Operating Input
c. 0.15  Internal Power MOSFET
d. Adjustable Switching Frequency
e. Analog and PWM Dimming
f. 0.2V Reference Voltage
g. 5 A Shutdown Mode
h. Open Strings Protection
i. Input Over Voltage Protection
j. Output Short Circuit Protection

产品说明： 
    The MP2483 is a 55V, 2.5A, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 2.5A peak output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes thermal shutdown, cycle-by-cycle peak current limiting, input over voltage protection, open strings protection and output short circuit protection.

产品应用：
1. General LED Illuminations
2. LCD Backlight Panels
3. Handheld Computers
4. Automotive Internal Lighting
5. Portable Multimedia Players
6. Portable GPS Devices

产品规格：
1.MP2488DN-LF-Z DC-DC for Street lighting

2. Features
a. Wide 4.5V to 55V Operating Input Range
b. 220m  Internal Power MOSFET
c. Up to 200kHz Programmable Switching Frequency
d. 130 A Quiescent Current
e. Ceramic Capacitor Stable
f. Internal Soft-Start
g. Up to 97.5% Efficiency
h. 200mV reference voltage for high efficiency
i. Available in 3x3mm 10-Pin QFN and SOIC8 with Exposed Pad Packages

产品说明： 
    The MP2488 is a fixed frequency step-down switching regulator to deliver a constant current of up to 2A to high power LEDs. It integrates a high-side, high voltage power MOSFET with a current limit of 3.2A. The wide 4.5V to 55V input range accommodates a variety of step-down applications, making it ideal for automotive, industry and general lighting applications. Peak current mode control and 200mV reference are applied for fast loop response, easycompensation and accurate LED current regulation. The switching frequency is programmable with an external resistor up to 200kHz, which can prevent EMI (Electromagnetic Interference) noise problems. The thermal shut down provides reliable, fault tolerant operations. A 12 A quiescent current in shutdown mode allows its use in battery-powered applications.

产品应用：
High power LED dirver
Automotive and General Lighting
Constant Source

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