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首页产品索引HV9912

HV9912

购买收藏
SWITCH-MODE LED DRIVER IC WITH HIGH CURRENT ACCURACY

 

产品信息

The HV9912 is a current mode control LED driver IC designed to control single switch PWM converters (buck, boost, buck-boost or SEPIC) in a constant frequency mode. The controller uses a peak current-mode control scheme with programmable slope compensation and includes an internal transconductance amplifier to control the output current in closed loop enabling high output current accuracy (in the case of buck and buck-boost converters, the output current can be sensed using a high side current sensor like the HV7800). In the constant frequency mode, multiple HV9912 ICs can by synchronized to each other or to an external clock using the SYNC pin. Programmable MOSFET current limit enables current limiting during input under voltage and output overload conditions. The IC also includes a 0.2A source and 0.4A sink gate driver that makes the HV9912 suitable for high power applications. An internal 90V linear regulator powers the IC eliminating the need for a separate power supply for the IC. The IC also provides a FAULT output, which can be used to disconnect the LEDs in case of a fault condition using an external disconnect FET. HV9912 also provides a TTL compatible, low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz. The HV9912 includes hiccup protection from both short and open circuits, with automatic recovery after the fault condition is cleared. The HV9912 is a pin compatible replacement toHV9911. It is compatible with existing HV9911 designs which have an input voltage of less than 90V by changing ROVP1, ROVP, and RT.

  Switch mode controller for single switch drivers

   ♦ Buck

   ♦ Boost

   ♦ Buck-boost and SEPIC

  Works with high side current sensors

  Closed loop control of output current

  High PWM dimming ratio

  Internal 90V linear regulator (can be extended using external Zener diodes)

  Internal 2% voltage reference (0°C

  Constant frequency operation

  Programmable slope compensation

  Linear & PWM dimming

  +0.2A/-0.4A gate drive

  Hiccup mode protection for both short circuit and open circuit conditions

  Synchronization capability

  Pin compatible with HV9911

电路图、引脚图和封装图

在线购买

型号制造商描述购买
HV9912NG-G-M934FairchildIC GP OPAMP 2 CIRCUIT 9SIP 立即购买
HV9912NG-G-M901Epson有源晶振 SMD3225_4P 立即购买
HV9912NG-GATSHEATSINK30X30X15MMR-TABT412 立即购买

技术资料

标题类型大小(KB)下载
利用AD9912超奈奎斯特频率操作得到高RF输出信号PDF312 点击下载
AD9912,pdf datasheet (1 GSPS DRAR554 点击下载
EVAL-AD9912A_评估板使用手册PDF496 点击下载
Agilent N9912A FieldFox RF AnaRAR122 点击下载
AD9912英文资料PDF642 点击下载
AD9912原理图PDF124 点击下载

应用案例更多案例

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