发明名称 |
Electronic ballast with protected analog dimming control interface |
摘要 |
A control signal interface circuit includes a line voltage protection circuit coupled to first and second input terminals. The protection circuit provides an input DC voltage across the input terminals within a predetermined range (i.e., 0-10 Vdc) and prevents the application of an input line voltage (i.e., 347 Vac) across the input terminals. A first current source circuit is coupled to the protection circuit, an isolation circuit is coupled to the first current source circuit and a second current source circuit is coupled to the isolation circuit. The first and second current source circuits collectively provide a linear output DC voltage with respect to the input DC voltage. At least one of the first and second current source circuits include circuitry wherein the linear conversion of the input DC voltage to the output DC voltage is independent of the temperature. |
申请公布号 |
US8654485(B1) |
申请公布日期 |
2014.02.18 |
申请号 |
US201113076888 |
申请日期 |
2011.03.31 |
申请人 |
KOEHLER JAMES;UNIVERSAL LIGHTING TECHNOLOGIES, INC. |
发明人 |
KOEHLER JAMES |
分类号 |
H02H7/00;H02H3/20;H02H9/00;H02H9/04;H05B37/00;H05B37/02 |
主分类号 |
H02H7/00 |
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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