Startup of DC-DC converters utilizing multiple power segments
First Claim
1. A DC-DC converter system, comprising:
- power stage circuitry comprising a plurality of power segments coupled in parallel, said power stage circuitry is coupled between an input voltage and output stage circuitry and configured to deliver power to a load coupled to said output stage circuitry; and
pulse width modulation (PWM) and power stage controller circuitry configured to sequentially and progressively activate said plurality of power segments to limit an input in-rush current from said input voltage during a ramp up period and output voltage at said output stage circuitry, said PWM and power stage controller circuitry comprising a voltage threshold selection and comparator circuit configured to select an output voltage threshold from a plurality of output voltage thresholds and compare said selected output voltage threshold to said output voltage and to activate one of said power segments associated with said selected output voltage threshold.
7 Assignments
0 Petitions
Accused Products
Abstract
Generally, this disclosure provides methods and systems for improved startup for DC-DC converters that reduce input voltage droop, in-rush current and output voltage jumps. The system may include a power stage circuitry including a plurality of power segments coupled in parallel, the power stage circuitry is coupled between an input voltage and output stage circuitry and configured to deliver power to a load coupled to the output stage circuitry. The system may further include PWM and power stage controller circuitry configured to sequentially and progressively activate the plurality of power segments to limit an input in-rush current from the input voltage during a ramp up period and output voltage at the output stage circuitry.
-
Citations
18 Claims
-
1. A DC-DC converter system, comprising:
-
power stage circuitry comprising a plurality of power segments coupled in parallel, said power stage circuitry is coupled between an input voltage and output stage circuitry and configured to deliver power to a load coupled to said output stage circuitry; and pulse width modulation (PWM) and power stage controller circuitry configured to sequentially and progressively activate said plurality of power segments to limit an input in-rush current from said input voltage during a ramp up period and output voltage at said output stage circuitry, said PWM and power stage controller circuitry comprising a voltage threshold selection and comparator circuit configured to select an output voltage threshold from a plurality of output voltage thresholds and compare said selected output voltage threshold to said output voltage and to activate one of said power segments associated with said selected output voltage threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method, comprising:
-
determining a plurality of output voltage threshold values and a plurality of current limit timer values; activating a first power segment of a DC-DC converter; monitoring output voltage and current; determining if said output voltage equals a first of said output voltage threshold values; determining if a first of said current limit timer values has timed out; and activating a second power segment of said DC-DC converter if said output voltage equals said first output voltage threshold value or if said first current limit timer value has timed out. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
Specification