公开(公告)号：EP1134881B1

公开(公告)日：2006-01-04

申请号：EP00830202.8

申请日：2000-03-17

Applicant: STMicroelectronics S.r.l.

Inventor： Gattavari, Giuseppe ,  Adragna, Claudio ,  Fagnani, Mauro

IPC: H02M3/335

CPC classification number: H02M3/335 ,  Y10S323/901

公开(公告)号：EP1178591B1

公开(公告)日：2004-04-14

申请号：EP00830547.6

申请日：2000-07-31

Applicant: STMicroelectronics S.r.l.

Inventor： Bontempo, Gregorio ,  Adragna, Claudio ,  Fagnani, Mauro ,  Pidutti, Albino ,  Pulvirenti, Francesco ,  Quaglino, Roberto ,  Gattavari, Giuseppe

IPC: H02M3/28

CPC classification number: H02M3/28 ,  H02M1/32 ,  H02M3/33523

公开(公告)号：EP1134881A1

公开(公告)日：2001-09-19

申请号：EP00830202.8

申请日：2000-03-17

Applicant: STMicroelectronics S.r.l.

Inventor： Gattavari, Giuseppe ,  Adragna, Claudio ,  Fagnani, Mauro

IPC: H02M3/335

CPC classification number: H02M3/335 ,  Y10S323/901

Abstract: A method and a circuit for disabling a converter while allowing its self-recovery, the converter circuit comprising a transformer (T1) provided with an auxiliary winding (L1) self-supplying, after start-up, an integrated circuit (IC) containing the programming, driving, controlling and protecting circuitry of the converter, a start-up circuit directly connected to a power source, a rectifying circuit (D1, C1) of the voltage induced in the auxiliary winding (L1), supplying through a voltage regulator stage (R1, Z1, T1) the integrated circuit at a regulated voltage (Vreg), at least an external line comprising a sensor of an electrical or physical quantity to be monitored (NTC, Rs), biased to a reference voltage, functionally coupled to a disable input pin (A-REC) of the integrated circuit for disabling it when a certain threshold value is surpassed. The method consists in using the regulated self-supply voltage of the converter (Vreg) as biasing voltage of the external sensor line and as reference voltage of an hysteresis comparator monitoring the signal representing the monitored quantity produced an the external sensor line. Upon the switching of the hysteresis comparator the integrated converter circuit (IC) is turned off and the limiting value of the rectified voltage (Vcc) self-supplying the integrated converter circuit (IC) is markedly reduced by short-circuiting to ground a portion (Z4, Z5) of a sectionable voltage clamp chain (Z2, Z3, Z4, Z5) coupled between the output (Vcc) of the rectifying circuit (D1, C1) and a common ground node of the circuit.

Abstract translation: 一种用于在允许其自恢复的同时禁用转换器的方法和电路，所述转换器电路包括设置有辅助绕组（L1）的变压器（T1），所述辅助绕组（L1）在启动后自供应集成电路（IC） 编程，驱动，控制和保护转换器的电路，直接连接到电源的启动电路，在辅助绕组（L1）中感应的电压的整流电路（D1，C1），通过调压器级 （Vreg）的至少一个外部线路（R1，Z1，T1），所述外部线路包括被监控的电或物理量的传感器（NTC，Rs），偏置到参考电压，功能性地耦合到 集成电路的禁用输入引脚（A-REC），用于在超过某个阈值时将其禁用。 该方法包括使用转换器的调节自供电压（Vreg）作为外部传感器线路的偏置电压，并将滞后比较器的参考电压用于监控代表监控量产生的外部传感器线路的信号。 在迟滞比较器的切换时，集成转换器电路（IC）关断，并且自供应集成转换器电路（IC）的整流电压（Vcc）的极限值通过将接地的一部分短路 （D1，C1）的输出（Vcc）和该电路的公共接地节点之间的可分段电压钳位链（Z2，Z3，Z4，Z5）的输出端（Z1，Z4，Z5）

公开(公告)号：EP0871328A1

公开(公告)日：1998-10-14

申请号：EP97830164.6

申请日：1997-04-09

Applicant: STMicroelectronics S.r.l.

Inventor： Adragna, Claudio ,  Gattavari, Giuseppe ,  Fagnani, Mauro

IPC: H04N3/185 ,  H02M3/335

CPC classification number: H04N3/185 ,  H02M3/33523

Abstract: The power output of a static DC_DC converter employing a current mode PWM controller is controlled upon the varying of the switching frequency, by detecting the sawtooth signal produced by the local oscillator generating a DC signal with amplitude inversely proportional to the frequency and by alternatively clamping the output voltage of the error amplifier of the PWM controller at a voltage proportional to the amplitude of said DC signal or by offsetting the signal present on the currents sensing resistor by a voltage corresponding to the difference between a constant voltage and said DC signal.

Abstract translation: 采用电流模式PWM控制器的静态DC_DC转换器的功率输出通过检测由本地振荡器产生的具有与频率成反比的幅度的DC信号产生的锯齿波信号，并且通过交替钳位 PWM控制器的误差放大器的输出电压与所述DC信号的幅度成比例的电压，或者通过将存在于电流检测电阻上的信号偏移与恒定电压和所述DC信号之间的差相对应的电压。