| 摘要 |
The present invention refers to an apparatus for driving an electromagnetic load (LD). The apparatus comprises a power stage (1, 2) comprising at least one first (1) and one second (2) transistor half-bridge and the electromagnetic load (LD) is arranged between the first (1) and the second (2) half-bridge. The apparatus comprises a first (5) and a second (6) device suitable for driving in linear modality respectively the first (1) and the second (2) half-bridge and another device (7) suitable for driving in pulse width modulation modality the first half-bridge (1), first switch means (SW1) suitable for connecting the first half-bridge (1) to the first device (5) or to the other device (7) in response to a control signal (Lin/PWM), second switch means (SW2) suitable for connecting the second half-bridge (2) to the second device (6) in response to the control signal (Lin/PWM). The apparatus has an input signal (Vin) and comprises a further device (10) suitable for connecting the second half-bridge (2) to a first reference voltage (Vgate) and to a second reference voltage (GND), with said first reference voltage (Vgate) greater than said second reference voltage (GND), when said first half-bridge (1) is connected to the other device (7) suitable for driving it in pulse width modulation modality. |
