公开(公告)号：US6023178A

公开(公告)日：2000-02-08

申请号：US50583

申请日：1998-03-30

申请人： Masaki Shioya ,  Hideaki Matsumura ,  Takumi Ooe ,  Iwao Nakanishi ,  Masuo Hanawaka

发明人： Masaki Shioya ,  Hideaki Matsumura ,  Takumi Ooe ,  Iwao Nakanishi ,  Masuo Hanawaka

IPC分类号： H02M3/335 ,  H03K3/017

CPC分类号： H02M3/33523

摘要： A pulse width control IC circuit that greatly reduces price, increases packaging density,and improves reliability for switching power supply units, wherein the IC circuit is on a single chip and includes a main converter control section that controls the ON and OFF actions of a main switch outside the IC, an output MOSFET, and an auxiliary converter control section that controls the ON and OFF actions of the output MOSFET.

摘要翻译： 一种脉冲宽度控制IC电路，其大大降低了价格，提高了封装密度，并提高了开关电源单元的可靠性，其中IC电路在单个芯片上，并且包括主转换器控制部分，其控制主电源的ON和OFF动作 在IC外部切换，输出MOSFET和辅助转换器控制部分，用于控制输出MOSFET的ON和OFF动作。

公开(公告)号：US5862044A

公开(公告)日：1999-01-19

申请号：US969335

申请日：1997-11-28

申请人： Masaki Shioya ,  Hideaki Matsumura ,  Takumi Ooe

发明人： Masaki Shioya ,  Hideaki Matsumura ,  Takumi Ooe

IPC分类号： H02M1/00 ,  H02M3/335 ,  H02M7/122

CPC分类号： H02M3/33523 ,  H02M1/32 ,  H02M2001/0006

摘要： A switching power supply apparatus wherein a main converter turns "on" and "off" a DC current applied to a primary winding of a main transformer using a main switching element and outputs a main output voltage to the secondary side after rectifying and smoothing current induced in a secondary winding; an error amplifier generates an error voltage between the main output voltage and a first reference voltage; a PWM control circuit outputs an on-off control signal for the main switching element so that the error voltage is minimized; a photo coupler receives the error voltage and provides an output to the PWM control circuit; an over-voltage protection circuit generates an over-voltage protection signal when the main output voltage exceeds a second reference voltage; an on-off circuit outputs either a high level potential or a common level potential depending on whether the power is to be turned "on" or "off"; a shut down latch circuit outputs a shut down signal when the over-voltage protection signal represents an over-voltage state; and a shut down implementation circuit holds the input voltage to the photo-coupler at a value which suppresses input to the photo-coupler when a signal from the on-off circuit specifies power off or when the shut down signal from the shut down latch circuit is effective; whereby only a single isolator is required in the apparatus.

摘要翻译： 一种开关电源装置，其中主转换器使用主开关元件将施加到主变压器的初级绕组的DC电流“on”和“off”，并且在整流和平滑电流感应之后将主输出电压输出到次级侧 在次级绕组中; 误差放大器在主输出电压和第一参考电压之间产生误差电压; PWM控制电路输出用于主开关元件的通断控制信号，使得误差电压最小化; 光耦合器接收误差电压并向PWM控制电路提供输出; 当主输出电压超过第二参考电压时，过电压保护电路产生过电压保护信号; 开关电路根据电源是否被“接通”还是“关闭”而输出高电平电位或公共电平电位; 当过电压保护信号表示过电压状态时，关闭锁存电路输出关闭信号; 并且关闭实施电路将来自光电耦合器的输入电压保持为当来自开 - 关电路的信号指定电源关闭时或当来自关闭锁存电路的关闭信号时抑制对光电耦合器的输入的值 是有效的; 从而在设备中仅需要一个隔离器。