INDUSTRY

美信集成MOSFET和高边电流检测电路的2MHz的引进，突出（乙肝）LED驱动器产品：MAX16822A / B和MAX16832A /荤*.这些高度集成的设备，以减少半导体照明（SSL）的设计规模，复杂性和成本，简化了绿色照明技术的实施。不仅如此，该设备还提供了系统设计的LED转换效率高和先进的热管理功能的重要特点。 MAX16822A / B和MAX16832A / C的射灯，MR111和其他建筑照明，以及汽车前后的理想照明（RCL，DRL和雾灯/近光）。
系列高压，开关模式高亮度LED驱动器，以便能够输出95％的效率的18W（MAX16822A / B）或36W（MAX16832A /三）电力，驱动多达15个串联白光LED。 MAX16822A / B的LED串可以提供高达持续的直流电流，MAX16832A 350mA的/ C可提供高达700mA的连续直流电流。器件提供模拟亮度调整功能，可以通过外部直流电压和PWM的LED电流输入的亮度控制，以实现亮度控制水平广泛。
这些HB LED驱动器仅需少量外部无源元件，完成低成本LED驱动电路设计。器件集成了导通状态电阻为0.85Ω（MAX16822A / B）和0.45Ω（MAX16832A / C）的65V的MOSFET开关，无需外部功率晶体管的需要。此外，高边电流检测和当前设置，以确保± 3％的LED电路集成在同一时间电流准确度，进一步减少了外部器件数量。
磁滞降压型（降压）设备的方式，以便能够达到65V的直流输入电压驱动的乙肝长串LED。这不控制环路补偿，从而简化了设计，大大减少了元件数量控制方法。 MAX16822A / B和MAX16832A / C是不使用根据输出电容器的条件将能保持LED电流纹波10％（甲版）和30％（B和C版本）或更少。此外，该器件支持高达2MHz的开关频率允许使用小尺寸元件。
MAX16822A / B和MAX16832A / C具有热关断电路，可在过热保护装置的情况。 200mV的高边在大幅减少的压力降外部审查两端的流阻电流检测，从而降低功耗。此外，该器件还提供热折返保护，当LED串在超速门的温度与外部负温度系数（NTC）的热敏电阻器用于降低LED电流模拟。
可靠的HB LED驱动器产品线6.5V的输入电压范围为65V的，在-40 ° C的工作至+125 ° C汽车级温度范围。 MAX16822A /乙提供无铅，8引脚SO封装，MAX16832A / C提供裸焊盘8引脚SO封装。 MAX16822A / B开始为1.31美元（1000起开始于0.99美元，MAX16832A / ç，美国离岸价）。

Maxim efficient introduction of high-pressure drive HBLED products realize green lighting program

Maxim Integrated MOSFET and the introduction of high-side current detection circuit 2MHz, highlight (HB) LED driver products: MAX16822A / B and MAX16832A / C *. These highly integrated devices to reduce the semiconductor lighting (SSL) design size, complexity and cost, simplify the implementation of green lighting technology. Not only that, the device also provides system design LED critical characteristics of high conversion efficiency and advanced thermal management capabilities. MAX16822A / B and MAX16832A / C ideal for MR16, MR111 and other architectural lighting, as well as the car before and after lighting (RCL, DRL, and fog / light near).
the series high-voltage, switch-mode HB LED drivers in order to be able to output 95% efficiency of 18W (MAX16822A / B) or 36W (MAX16832A / C) power, drive up to 15 tandem white led. MAX16822A / B for the LED string can provide up to 350mA of continuous DC current, MAX16832A / C can provide up to 700mA of continuous DC current. Devices to provide analog brightness adjustment function can be through an external DC voltage and PWM brightness control of LED current input in order to achieve a wide range of brightness level of control.
these HB LED driver only a few external passive components to complete the low-cost LED driver circuit design. Device integrates RDSON for 0.85Ω (MAX16822A / B) and 0.45Ω (MAX16832A / C) of the 65V switching MOSFET, eliminating the need for external power transistor. In addition, the high-side current detection and integration of the current setting circuit in ensuring ± 3% LED current accuracy at the same time, further reducing the required number of external devices.
type hysteretic buck (buck) mode of the device in order to be able to up to 65V DC input voltage drive long string of HB LED. This control method without control loop compensation, which simplifies the design and greatly reducing the number of components. MAX16822A / B and MAX16832A / C is not in use under the conditions of the output capacitor will be able to keep the LED current ripple 10% (A version) and 30% (B and C versions) or less. In addition, the device supports up to 2MHz switching frequency allows the use of small size components.
MAX16822A / B and MAX16832A / C has a thermal shutdown circuit may be circumstances in overheating protection device. 200mV High Side Current Sense of greatly reducing the flow resistance at both ends of the external review of pressure drop, thereby reducing power consumption. In addition, the device also provides simulation of hot reentry protection, when the LED strings door temperature in excess of the limit, with an external negative temperature coefficient (NTC) thermistor used to reduce the LED current.
the reliable HB LED driver product line input voltage range of 6.5V to 65V, work in -40 ° C to +125 ° C automotive temperature range. MAX16822A / B to provide lead-free, 8-pin SO package, MAX16832A / C to provide the bare pad 8 pin SO package. MAX16822A / B starts at $ 0.99, MAX16832A / C starts at $ 1.31 (1000 up, FOB USA).

(08-9-5)