Multi-phase DC-DC controller
A DC-to-DC, controller technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve problems such as affecting resistance value, function setting malfunction, and increasing circuit cost.
Active Publication Date: 2019-04-05
UPI SEMICON CORP
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Problems solved by technology
[0005] However, when the enable pin EN in the drive circuit 2 connected to the drive control pin DRCTRL has an internal ground resistance, it will affect the resistance value of the ground resistance RG externally connected to the drive control pin DRCTRL, so that the generated There is an error in the reference current, which in turn leads to malfunction of the function setting
In order to improve the above deficiency, in the prior art, an additional buffer element BF (such as figure 1 shown), but it also leads to an increase in circuit cost
Method used
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[0069] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Elements / members with the same or similar numbers used in the drawings and embodiments are used to represent the same or similar parts.
[0070]A preferred embodiment of the present invention is a multi-phase DC-DC controller. In this embodiment, the multi-phase DC-DC controller can be connected to a driver (such as a driving circuit or a driving switch circuit) and selectively output a PWM signal or an enabling signal to the driver, but not limited thereto.
[0071] Please refer to image 3 , image 3 A schematic diagram of the multiphase DC-to-DC controller in this embodiment. Such as image 3 As shown, the multi-phase DC-to-DC controller 3 is connected to the driving switch circuit 4 . The multi-phase DC-to-DC controller 3 includes a phase detection selection unit 30, a time signal generation unit 32, an enab...
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A multi-phase DC-DC controller is provided and is connected to a driver having an enable pin. The controller includes an N-th phase current sensing pin, an N-th phase PWN pin, a phase detection selection unit, an enable setting unit and a switching unit, with the N being a positive integer. The N-th phase PWN pin is connected to the enable pin. The phase detection selection unit is connected to the N-th phase current sensing pin, and generates a control signal according to a detection signal of the N-th phase current sensing pin. The enable setting unit provides an enable signal. The switchingunit is connected to the enable setting unit and the phase detection selection unit, and switches a signal path according to the control signal to let the enable signal be provided to the enable pinof the driver through the N-th phase PWN pin. The multi-phase DC-DC controller can omit the cost of arranging an external buffer and can effectively improve flexibility of circuit application.
Description
technical field [0001] The present invention relates to power conversion, in particular to a multi-phase DC-to-DC controller. Background technique [0002] The multi-phase DC-to-DC controller includes a timing signal generating unit and multiple PWM pins. The timing signal generating unit transmits multiple PWM signals to multiple external drivers through multiple PWM pins. circuit (Driver) or drive switch circuit (DrMOS). [0003] Please refer to figure 1 , in the prior art, the phase subtraction unit 10 in the traditional multi-phase DC-to-DC controller 1 can judge the number of idle phases according to the detection signal DS detected by the current sensing pin CSNx, so as to find out that there is no operation And idle pulse width modulation pin. When the detection signal DS detected by the current sensing pin CSNx is the operating voltage VCC, the phase subtraction unit 10 determines that the pulse width modulation pin PWMx does not need to send a pulse width modulat...
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IPC IPC(8): H02M3/00H02M1/088
CPCH02M1/088H02M3/00
Inventor 张志廉洪沛霝徐正青洪焕然
Owner UPI SEMICON CORP