发明名称 |
HIGH-SIDE CURRENT SENSE HYSTERETIC LED CONTROLLER |
摘要 |
Systems and methods for hysteretically controlling Light Emitting Diodes (LEDs) when the input voltage is greater than or equal to 18 volts. An example system includes one or more LEDs and a circuit electrically coupled to the one or more LEDs. The circuit hysteretically controls an input voltage supplied to the one or more LEDs based on a sensed electric current that passes through the LEDs. The circuit includes a MOSFET switch for switching on and off the input voltage supplied to the one or more LEDs, a current sensing subcircuit including a first integrated circuit (IC) for sensing the current flowing through the one or more LEDs, a hysteretic comparator circuit including a second IC for generating a hysteretic control signal based on the sensed current, and a switch driver including a third IC for controlling operation of the switch based on the generated hysteretic control signal. |
申请公布号 |
WO2008115286(A3) |
申请公布日期 |
2008.11.13 |
申请号 |
WO2007US81577 |
申请日期 |
2007.10.17 |
申请人 |
HONEYWELL INTERNATIONAL INC.;SCHINDEL, DARREN T.;DE OTO, LEONARD |
发明人 |
SCHINDEL, DARREN T.;DE OTO, LEONARD |
分类号 |
H05B33/08 |
主分类号 |
H05B33/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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