发明名称 |
Negative voltage clamp circuit for controlling currents in inductive loads |
摘要 |
A circuit capable of driving inductive loads below a chip substrate voltage level while minimizing on-chip power dissipation and eliminating parasitic effects. Two negative voltage drive modes are included in the circuit design. The first drive circuit forces a low negative voltage referenced to the circuit output voltage across an inductive load referenced to ground to provide a slow recirculation of the current in the inductive load. The second drive circuit forces a large negative voltage referenced to the circuit output voltage across the inductive load to provide a fast collapse of the inductive load. The switching regulator switches off when the current to the inductive load reaches a first value and switches on when the recirculating current from back e.m.f. reaches a second value. The switching regulator initially provides a higher level of power when first tuned on.
|
申请公布号 |
US5134537(A) |
申请公布日期 |
1992.07.28 |
申请号 |
US19910803756 |
申请日期 |
1991.12.05 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
BUSS, KENNETH G.;CAMPOS, ERIC E. |
分类号 |
H01F7/18;H01H47/32 |
主分类号 |
H01F7/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|