公开(公告)号：EP0285417A3

公开(公告)日：1989-03-01

申请号：EP88302885.4

申请日：1988-03-30

申请人： GENERAL ELECTRIC COMPANY

发明人： Carlson, Peter John ,  Hodgins, Robert George

IPC分类号： H05B39/02

CPC分类号： H05B39/02

摘要： The junction temperature rise of a power MOSFET (12;202;402) serially connected to a lamp (32;204;404) whose resistance nonlinearly increases during turn-on is moderated by the use of control circuitry which initially sets up a relatively low essentially constant current flow through the lamp and transistor and then automatically after the lamp resistance reaches a preselected level, the lamp is allowed to draw significantly more current. Alternatively, there is initially an essentially constant flow of current to the MOSFET gate, causing a gradual turn-on, until the lamp resistance reaches the preselected level. The size and therefore cost of the power MOSFET is reduced significantly because the magnitude of the current spike generated by turning on the lamp is significantly reduced by the use of the novel control circuitry.

公开(公告)号：EP0285417A2

公开(公告)日：1988-10-05

申请号：EP88302885.4

申请日：1988-03-30

申请人： GENERAL ELECTRIC COMPANY

发明人： Carlson, Peter John ,  Hodgins, Robert George

IPC分类号： H05B39/02

CPC分类号： H05B39/02

摘要： The junction temperature rise of a power MOSFET (12;202;402) serially connected to a lamp (32;204;404) whose resistance nonlinearly increases during turn-on is moderated by the use of control circuitry which initially sets up a relatively low essentially constant current flow through the lamp and transistor and then automatically after the lamp resistance reaches a preselected level, the lamp is allowed to draw significantly more current. Alternatively, there is initially an essentially constant flow of current to the MOSFET gate, causing a gradual turn-on, until the lamp resistance reaches the preselected level. The size and therefore cost of the power MOSFET is reduced significantly because the magnitude of the current spike generated by turning on the lamp is significantly reduced by the use of the novel control circuitry.

摘要翻译： 串联连接到其导通电阻非线性增加的灯（32; 204; 404）的功率MOSFET（12; 202; 402）的结温升高通过使用最初设置相对较低的控制电路来缓和 基本上恒定的电流流过灯和晶体管，然后在灯电阻达到预选电平后自动流动，灯被允许抽出明显更多的电流。 或者，最初有一个基本恒定的电流流向MOSFET栅极，导致逐渐导通，直到灯电阻达到预选电平。 通过使用新颖的控制电路，功率MOSFET的尺寸和因此的成本显着降低，因为通过导通灯而产生的电流尖峰的幅度显着降低。