Gate driver circuit
First Claim
Patent Images
1. A gate driver circuit, comprising:
- a driving signal generating unit configured to generate first and second control signals based on a data signal and a fault state signal and control gate detection;
a driving inverter configured to operate in response to the first and second control signals to generate a gate signal and provide the gate signal to a power switch element; and
a soft turn-off/gate detecting unit configured to operate in response to the second control signal, perform a soft turn-off in the case of a fault, and detect the gate signal to provide a detected signal;
wherein the first control signal has a level into which the data signal is inverted when the fault state signal is at the low level and has a level into which the fault state signal is inverted regardless of a level of the data signal when the fault state signal is at the high level,wherein the second control signal has a same level as the first control signal when the fault state signal is at the low level and has a level of the fault state signal regardless of the level of the first control signal when the fault state signal is at the high level.
1 Assignment
0 Petitions
Accused Products
Abstract
A gate driver circuit may include a driving signal generating unit generating first and second control signals based on a data signal and a fault state signal and controlling gate detection, a driving inverter operating in response to the first and second control signals to generate a gate signal and providing the gate signal to a power switch element, and a soft turn-off/gate detecting unit operating in response to the second control signal, performing a soft turn-off in the case of a fault, and detecting the gate signal to provide a detected signal.
9 Citations
19 Claims
-
1. A gate driver circuit, comprising:
-
a driving signal generating unit configured to generate first and second control signals based on a data signal and a fault state signal and control gate detection; a driving inverter configured to operate in response to the first and second control signals to generate a gate signal and provide the gate signal to a power switch element; and a soft turn-off/gate detecting unit configured to operate in response to the second control signal, perform a soft turn-off in the case of a fault, and detect the gate signal to provide a detected signal; wherein the first control signal has a level into which the data signal is inverted when the fault state signal is at the low level and has a level into which the fault state signal is inverted regardless of a level of the data signal when the fault state signal is at the high level, wherein the second control signal has a same level as the first control signal when the fault state signal is at the low level and has a level of the fault state signal regardless of the level of the first control signal when the fault state signal is at the high level. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A gate driver circuit, comprising:
-
a driving signal generating unit configured to generate first and second control signals based on a data signal and a fault state signal and control gate detection; a driving inverter configured to operate in response to the first and second control signals to generate a gate signal and provide the gate signal to a power switch element; a soft turn-off/gate detecting unit configured to operate in response to the second control signal, perform a soft turn-off in the case of a fault, and detect the gate signal to provide a detected signal; a clamp controlling unit configured to provide a gate clamp control signal based on the second control signal and the detected signal; and an active clamp circuit unit configured to operate in response to the clamp control signal of the clamp controlling unit to connect a gate of the power switch element to a ground; wherein the first control signal has a level into which the data signal is inverted when the fault state signal is at the low level and has a level into which the fault state signal is inverted regardless of a level of the data signal when the fault state signal is at the high level, wherein the second control signal has a same level as the first control signal when the fault state signal is at the low level and has a level of the fault state signal regardless of the level of the first control signal when the fault state signal is at the high level. - View Dependent Claims (7, 8, 9, 10, 11, 12)
-
-
13. A gate driver circuit, comprising:
-
a driving signal generating unit configured to generate first and second control signals based on a data signal and a fault state signal and control gate detection; a driving inverter configured to operate in response to the first and second control signals to generate a gate signal and provide the gate signal to a power switch element; a soft turn-off/gate detecting unit configured to operate in response to the second control signal, perform a soft turn-off in the case of a fault, and detect the gate signal to provide a detected signal; a clamp controlling unit configured to provide a gate clamp control signal based on the second control signal and the detected signal; and an active clamp circuit unit configured to operate in response to the clamp control signal of the clamp controlling unit to connect a gate of the power switch element to a ground, wherein the driving signal generating unit and the clamp controlling unit are implemented as a logical circuit; wherein the first control signal has a level into which the data signal is inverted when the fault state signal is at the low level and has a level into which the fault state signal is inverted regardless of a level of the data signal when the fault state signal is at the high level, wherein the second control signal has a same level as the first control signal when the fault state signal is at the low level and has a level of the fault state signal regardless of the level of the first control signal when the fault state signal is at the high level. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification