Title:
DC-DC CONVERTERS
Document Type and Number:
WIPO Patent Application WO/2018/051087
Kind Code:
A8
Abstract:
A voltage reducing circuit (102) comprises a power switch circuit portion (10) comprising a high-side (128) and low-side (130) field-effect-transistors connected at a switch node (138). The power switch circuit portion has an on-state wherein the high-side transistor is enabled and the low-side transistor is disabled and, vice versa, an off-state. An energy storage circuit portion (106) comprising an inductor (32) connected to the switch node is arranged to provide an output voltage (136). A drive circuit portion (104) receives a pulse width modulated control signal and outputs pulse width modulated (PWM) drive signals. A pre-biasing circuit portion (150) applies bias voltages to the gate terminals of the high-side and low-side transistors in response to the PWM drive signals, wherein the pre-biasing circuit portion is arranged such that the bias voltage applied to the gate terminal of the currently disabled transistor is set to an intermediate voltage before switching between the on-state and the off-state.
Inventors:
HALLIKAINEN SAMULI ANTTI (NO)
Application Number:
PCT/GB2017/052701
Publication Date:
September 07, 2018
Filing Date:
September 13, 2017
Export Citation:
Assignee:
NORDIC SEMICONDUCTOR ASA (NO)
SAMUELS ADRIAN JAMES (GB)
SAMUELS ADRIAN JAMES (GB)
International Classes:
H02M3/156; H02M1/08; H02M1/38
Attorney, Agent or Firm:
DEHNS (GB)
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