What is claimed is:
1. A gate driver comprising:
an edge detection circuit for detecting leading and trailing edges of a control input signal;
an ON pulse generation circuit for generating an ON pulse in response to the leading or trailing edge of the control input signal, which is detected by the edge detection circuit;
a first OFF pulse generation circuit for generating a first OFF pulse in response to the leading or trailing edge of the control input signal, which is detected by the edge detection circuit;
a status hold circuit for driving an output element in response to the ON pulse outputted from the ON pulse generation circuit and for holding driving status of the output element until the first OFF pulse is outputted from the first OFF pulse generation circuit; and
a second OFF pulse generation circuit for generating a second OFF pulse in response to a protect operation signal and for supplying the second OFF pulse to the status hold circuit, thereby to stop driving of the output element when protect operation is instructed by the protect operation signal.
2. The gate driver according to claim 1, further comprising an abnormality detection circuit for detecting abnormal status, and a protect operation signal generation circuit for generating the protect operation signal when an abnormality is detected by the abnormality detection circuit and for supplying the protect operation signal to the second OFF pulse generation circuit.
3. The gate driver according to claim 1, wherein the second OFF pulse generation circuit generates the second OFF pulse only when the control input signal is at a level which instructs turn-off of the output element.
4. A gate driver comprising:
an edge detection circuit supplied with a control input signal and a protect operation signal, for detecting leading and trailing edges of the control input signal, the edge detection circuit being let stop operating when protect operation is instructed by the protect operation signal;
an ON pulse generation circuit for generating an ON pulse in response to the leading or trailing edge of the control input signal, which is detected by the edge detection circuit;
a first OFF pulse generation circuit for generating a first OFF pulse in response to the leading or trailing edge of the control input signal, which is detected by the edge detection circuit;
a status hold circuit for driving an output element and for holding driving status of the output element until the first OFF pulse is outputted from the first OFF pulse generation circuit; and
a second OFF pulse generation circuit for generating a second OFF pulse in response to the control input signal and the protect operation signal and for providing the second OFF pulse to the status hold circuit, wherein
when turn-off of the output element is instructed by the control input signal and protect operation is instructed by the protect operation signal, the second OFF pulse is outputted to stop driving of the output element.
5. A gate driver comprising:
an abnormality detection circuit for detecting abnormal status;
a protect operation signal generation circuit for generating a protect operation signal when an abnormality is detected by the abnormality detection circuit;
a first determination circuit inputted with a control input signal of a high side, a control input signal of a low side, and the protect operation signal, for determining whether the control input signal of the high-side can be transmitted or not depending on status of the control input signal of the low side and the protect operation signal;
a second determination circuit inputted with a control input signal of a high side, a control input signal of a low side, and the protect operation signal, for determining whether the control input signal of the low side can be transmitted or not depending on status of the control input signal of the high side and the protect operation signal, and to drive the low-side output element;
a trigger signal generation circuit inputted with the protect operation signal, for generating a trigger signal for generating a high-side OFF pulse in synchronization with generation of the protect operation signal;
a third determination circuit supplied with the trigger signal outputted from the trigger signal generation circuit and an output signal from the first determination circuit, for determining whether the trigger signal can be transmitted or not depending on status of the control input signal of the high side;
an OFF pulse generation circuit supplied with the output signal from the first determination circuit and an output signal from the third determination circuits, for detecting falling of the control input signal of the high side and falling of the trigger signal and for generating an OFF pulse;
an ON pulse generation circuit supplied with the output signal of the first determination circuit, for detecting rising of the control input signal of the high side, and for generating an ON pulse; and
a status hold circuit for driving a high-side output element in response to the ON pulse outputted from the ON pulse generation circuit, and for holding driving status of the high-side output element until the OFF pulse is outputted from the OFF pulse generation circuit.
6. A power converter constructed by integrating a gate driver and an output element driven by the gate driver, in one-chip, the gate driver comprising:
an edge detection circuit for detecting leading and trailing edges of a control input signal;
an ON pulse generation circuit for generating an ON pulse in response to the leading or trailing edge of the control input signal, which is detected by the edge detection circuit;
a first OFF pulse generation circuit for generating a first OFF pulse in response to the leading or trailing edge of the control input signal, which is detected by the edge detection circuit;
a status hold circuit for driving the output element in response to the ON pulse outputted from the ON pulse generation circuit and for holding driving status of the output element until the first OFF pulse is outputted from the first OFF pulse generation circuit; and
a second OFF pulse generation circuit for generating a second OFF pulse in response to a protect operation signal and for supplying the second OFF pulse to the status hold circuit, thereby to stop driving of the output element.
7. The power converter according to claim 6, wherein the gate driver further comprises an abnormality detection circuit for detecting abnormal status, and a protect operation signal generation circuit for generating the protect operation signal when an abnormality is detected by the abnormality detection circuit and for supplying the protect operation signal to the second OFF pulse generation circuit.
8. The power converter according to claim 6, wherein the second OFF pulse generation circuit generates the second OFF pulse only when the control input signal is at a level which instructs turn-off of the output element.
9. A power converter constructed by integrating a gate driver and high-side and low-side output elements driven by the gate driver, in one-chip, the gate driver comprising:
an abnormality detection circuit for detecting abnormal status;
a protect operation signal generation circuit for generating a protect operation signal when an abnormality is detected by the abnormality detection circuit;
a first determination circuit inputted with a control input signal of a high side, a control input signal of a low side, and the protect operation signal, for determining whether the control input signal of the high-side can be transmitted or not depending on status of the control input signal of the low side and the protect operation signal;
a second determination circuit inputted with a control input signal of a high side, a control input signal of a low side, and the protect operation signal, for determining whether the control input signal of the low side can be transmitted or not depending on status of the control input signal of the high side and the protect operation signal, and to drive the low-side output element;
a trigger signal generation circuit inputted with the protect operation signal, for generating a trigger signal for generating a high-side OFF pulse in synchronization with generation of the protect operation signal;
a third determination circuit supplied with the trigger signal outputted from the trigger signal generation circuit and an output signal from the first determination circuit, for determining whether the trigger signal can be transmitted or not depending on status of the control input signal of the high side;
an OFF pulse generation circuit supplied with the output signal from the first determination circuit and an output signal from the third determination circuits, for detecting falling of the control input signal of the high side and falling of the trigger signal and for generating an OFF pulse;
an ON pulse generation circuit supplied with the output signal of the first determination circuit, for detecting rising of the control input signal of the high side, and for generating an ON pulse; and
a status hold circuit for driving a high-side output element in response to the ON pulse outputted from the ON pulse generation circuit, and for holding driving status of the high-side output element until the OFF pulse is outputted from the OFF pulse generation circuit.
10. A gate driver for controlling high-side and low-side switching elements constructed in a pushpull structure, comprising a high-side gate driver circuit for driving the high-side switching element in response to a high-side input signal, and a low-side gate driver circuit for driving the low-side switching element, the high-side gate driver circuit including:
a first edge detection circuit for detecting leading and trailing edges of the high-side input signal for driving the high-side switching element;
a second edge detection circuit for detecting leading and trailing edges of the low-side input signal for driving the low-side switching element;
an ON pulse generation circuit for generating an ON pulse, based on a detection output of the first edge detection circuit;
an OFF pulse generation circuit for generating an OFF pulse, based on detection outputs of the first and second edge detection circuits;
a latch circuit supplied with each of the ON pulse outputted from the ON pulse generation circuit and the OFF pulse outputted from the OFF pulse generation circuit, for holding ONOFF information of the high-side switching element instructed by the high-side input signal; and
a drive circuit for outputting a high-side gate signal for controlling the high-side switching element in accordance with the ONOFF information held by the latch circuit, and
when driving of the low-side switching element is instructed by the low-side input signal, the OFF pulse is generated from the OFF pulse generation circuit thereby to forcedly turn off the high-side switching element.
11. The gate driver according to claim 10, further comprising a filter circuit supplied with the detection output of the second edge detection circuit, a PWM (Pulse Width Modulation) control start time and a control period are distinguished from each other by the filter circuit, and the detection output of the second edge detection circuit is supplied to the OFF pulse generation circuit only at the PWM control start time.
12. The gate driver according to claim 10, wherein the high-side gate driver circuit and the low-side gate driver circuit are integrated in one-chip.
13. A power converter constructed by integrating a high-side and low-side switching elements having a pushpull structure, a high-side gate driver circuit for driving the high-side switching element in response to a high-side input signal, and a low-side gate driver circuit for driving the low-side switching element in response to a low-side input signal, in one-chip, the high-side gate driver circuit including:
a first edge detection circuit for detecting leading and trailing edges of the high-side input signal for driving the high-side switching element;
a second edge detection circuit for detecting leading and trailing edges of the low-side input signal for driving the low-side switching element;
an ON pulse generation circuit for generating an ON pulse, based on a detection output of the first edge detection circuit;
an OFF pulse generation circuit for generating an OFF pulse, based on detection outputs of the first and second edge detection circuits;
a latch circuit supplied with each of the ON pulse outputted from the ON pulse generation circuit and the OFF pulse outputted from the OFF pulse generation circuit, for holding ONOFF information of the high-side switching element instructed by the high-side input signal; and
a drive circuit for outputting a high-side gate signal for controlling the high-side switching element in accordance with the ONOFF information held by the latch circuit, wherein
when driving of the low-side switching element is instructed by the low-side input signal, the OFF pulse is generated from the OFF pulse generation circuit thereby to forcedly turn off the high-side switching element.
14. A gate driver for controlling the high-side and low-side switching elements having a pushpull structure, comprising a high-side gate driver circuit for driving the high-side switching element in response to a high-side input signal, and a low-side gate driver circuit for driving the low-side switching element in response to a low-side input signal, the high-side gate driver circuit including:
an edge detection circuit for detecting leading and trailing edges of the high-side input signal for driving the high-side switching element;
an input terminal externally inputted with a high-side forced OFF signal for forcedly turning off the high-side switching element;
an ON pulse generation circuit for generating an ON pulse, based on a detection output of the edge detection circuit;
an OFF pulse generation circuit for generating an OFF pulse, based on the detection output of the edge detection circuit and the high-side forced OFF signal inputted through the input terminal;
a latch circuit supplied with each of the ON pulse outputted from the ON pulse generation circuit and the OFF pulse outputted from the OFF pulse generation circuit, for holding ONOFF information of the high-side switching element instructed by the high-side input signal; and
a drive circuit for outputting a high-side gate signal for controlling the high-side switching element in accordance with the ONOFF information held by the latch circuit, wherein when the input terminal is inputted with the high-side forced OFF signal, the high-side switching element is forcedly turned off.
15. The gate driver according to claim 14, wherein the high-side gate driver circuit and the low-side gate driver circuit are integrated in one-chip.
16. A power converter constructed by integrating high-side and low-side switching elements having a pushpull structure, a high-side gate driver circuit for driving the high-side switching element in response to a high-side input signal, and a low-side gate driver circuit for driving the low-side switching element in response to a low-side input signal, in one-chip, the high-side gate driver circuit including:
an edge detection circuit for detecting leading and trailing edges of the high-side input signal for driving the high-side switching element;
an input terminal externally inputted with a high-side forced OFF signal for forcedly turning off the high-side switching element;
an ON pulse generation circuit for generating an ON pulse, based on a detection output of the edge detection circuit;
an OFF pulse generation circuit for generating an OFF pulse, based on the detection output of the edge detection circuit and the high-side forced OFF signal inputted through the input terminal;
a latch circuit supplied with each of the ON pulse outputted from the ON pulse generation circuit and the OFF pulse outputted from the OFF pulse generation circuit, for holding ONOFF information of the high-side switching element instructed by the high-side input signal; and
a drive circuit for outputting a high-side gate signal for controlling the high-side switching element in accordance with the ONOFF information held by the latch circuit, wherein
when the input terminal is inputted with the high-side forced OFF signal, the high-side switching element is forcedly turned off.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A jacket having warm pockets with both pockets being attachable and detachable which is opened and closed by means of an engaging element such as a zipper, buttons, etc. and a user can input hands into left and right sides about the engaging element, comprising:
an opening and closing part which opens and closes an end portion of one side of the pocket and is provided at an inner side of the jacket close to the opened end portion of the pocket; and
a plurality of engaging means which are provided at one side of the opening and closing part, both the pockets being connected by means of the engaging means of both sides after the opening and closing part is opened.
2. A jacket having warm pockets with both pockets being attachable and detachable according to claim 1, wherein an opening part is formed at one side of an inner surface of the pocket, and a tube-like passage is connected from the opening part of the pocket formed at both sides to the interior of the backside, so the pockets of both sides communicate with each other.
3. A jacket having warm pockets with both pockets being attachable and detachable according to claim 1, wherein a connection raw cloth member is engaged to an end portion of the pocket, and an engaging member is provided at one side of the connection raw cloth member, so the connection raw cloth members of both sides are engaged with each other by means of each engaging member after the opening and closing part is opened.
4. A jacket having warm pockets with both pockets being attachable and detachable according to claim 1, wherein a plurality of heating element accommodation pockets are provided at an inner side of the pocket or at a tube-like passage for thereby accommodating the heating element.
5. A jacket having warm pockets with both pockets being attachable and detachable according to claim 4, wherein a warming cover pocket is provided at an upper surface of the heating element accommodation pocket.
6. A jacket having warm pockets with both pockets being attachable and detachable according to claim 4, wherein an input part is formed at one side of the jacket close to the heating element accommodation pocket for the purpose of accommodating the heating element in the heating element accommodation pocket.
7. A jacket having warm pockets with both pockets being attachable and detachable according to claim 4, wherein there is provided a close contact means by which the heating element accommodation pocket comes into close contact with a body, and an operation opening and closing part is formed at one side of the jacket for the purpose of easily operating the close contact means.
8. A jacket having warm pockets with both pockets being attachable and detachable according to claim 7, wherein said close contact means has a cut-away part at one side of the jacket and is divided into two parts, and an adhering member is provided at one side of the cut-away part for thereby adhering by adjusting both the divided sides to a user’s body shape.
9. A jacket having warm pockets with both pockets being attachable and detachable according to claim 7, wherein said close contact means helps the heating element accommodation pocket come into close contact with a body by forming part or all parts of the jacket of a flexible material.
10. A jacket having warm pockets with both pockets being attachable and detachable according to claim 7, wherein said close contact means is characterized in that the other side of a length adjusting band having an engaging part at its one side is engaged to one side of the jacket, and a ring through which the length adjusting band passes is provided at one side of the jacket, and the length adjusting band passes through the ring and comes out of the ring, and each length adjusting band is engaged using the engaging part, and the jacket is tightened, so the heating element accommodation pocket comes into dose contact with a body.
11. A jacket having warm pockets with both pockets being attachable and detachable according to claim 7, wherein said close contact means is characterized in that an engaging part is provided at one side of the length adjusting band both ends of which are engaged to one side of the jacket, and the ring through which the length adjusting band passes is provided at one side of the jacket, and the length adjusting band surrounds the backside of the jacket, and as the length adjusting band is pulled forward using each engaging part, it is engaged, so the heating element accommodation pocket comes into close contact with a body by tightening the jacket.
12. A jacket having warm pockets with both pockets being attachable and detachable according to claim 10, wherein said length adjusting band is detachable from one side of the jacket.
13. A jacket having warm pockets with both pockets being attachable and detachable according to claim 11, wherein said length adjusting band is detachable from one side of the jacket.