Title:
【発明の名称】パワ―MOSトランジスタブリッジ駆動用ポンプ式充電回路
Document Type and Number:
Japanese Patent JP2525247
Kind Code:
B2
Abstract:
The circuit comprises a tank capacitance (C) and a charge circuit supplied with the same voltage (Vs) as the bridge (M1, M2) and comprising an inductance (L) and a control transistor (T). There is also provided a control circuit (CC), which comprises an oscillator (OSC) controlling the periodic switching of control transistor (T) and a comparator (CP1) which controls the momentary clamping of control transistor (T) in the condition wherein the charge circuit is interrupted when the difference between the voltage across capacitance (C) and the power supply voltage exceeds a preset maximum value and the unclamping of the same transistor (T) when such difference falls below a preset minimum value. A further comparator (CP2) similarly clamps control transistor (T) if there is an excess current in the transistor itself. The generated voltage (Vp), which is higher than the supply voltage (Vs), controls, through a driver circuit (DS2), the gate of a power MOS transistor (M2).
Inventors:
DOMENIKO ROTSUSHI
KURAUDEIO DEIATSUTSUI
KURAUDEIO DEIATSUTSUI
Application Number:
JP18486389A
Publication Date:
August 14, 1996
Filing Date:
July 19, 1989
Export Citation:
Assignee:
ETSUSE JI ETSUSE TOMUSON MIKUROERETSUTORONIKA SPA
International Classes:
H02M3/155; H02M3/156; H02M7/538; H02M3/07; H03K17/06; H03K17/082; H03K17/60; (IPC1-7): H02M3/155; H03K17/60
Domestic Patent References:
| JP60125167A | ||||
| JP6032570A | ||||
| JP5910166A | ||||
| JP58207870A | ||||
| JP60166284U | ||||
| JP6051784U |
Attorney, Agent or Firm:
Shinichi Ogawa (2 outside)