Patent ID: 8669790

Claim:
Control circuit arrangement for pulse-width modulated DC/DC converter comprising: a phase generator for a driver which provides respective gate signals (gaten, gatep) to a first and a second driver transistor, the phase generator comprising a first input terminal for a control signal (p_off_pwm); and a clock control circuit having a clock input terminal for a clock signal (xclk) and an input terminal for a pulse width modulated signal (pwm), the clock control circuit providing the control signal (p_off_pwm) in response to signal edges of the pulse width modulated signal (pwm) and the clock signal (xclk) applied thereto; wherein the phase generator further comprises a mode selection input terminal for a mode selection signal (hd), and the phase generator comprises a selection circuit to select a first mode of operation or a second mode of operation based on the mode selection signal (hd), and the phase generator provides a) in the first mode of operation each of the gate signals (gaten, gatep) in response to the control signal (p_off_pwm) and in response to the respective other gate signal, b) in the second mode of operation a first one of the gate signals (gaten, gatep) in response to the control signal (p_off_pwm), and c) a second one of the gate signals (gaten, gatep) in response to the control signal (p_off_pwm) and the clock signal (xclk).