UCD9240
www.ti.com. SLUS766C – JULY 2008 – REVISED NOVEMBER 2008 Digital PWM System Controller
FEATURES 1 Fully Configurable Multi-Output and
Multi-Phase Non-Isolated DC/DC PWM
Controller Controls Up To Four Voltage Rails and Up To
Eight Phases Supports Switching Frequencies Up to 2MHz
With 250 ps Duty-Cycle Resolution Up To 1mV Closed Loop Resolution Hardware-Accelerated, 3-Pole/3-Zero
Compensator With Non-Linear Gain for
Improved Transient Performance Supports Multiple Soft-Start and Soft-Stop
Configurations Including Prebias Start-up Supports Voltage Tracking, Margining and
Sequencing Supports Current and Temperature Balancing
for Multi-Phase Power Stages Supports Phase Adding/Shedding for
Multi-Phase Power Stages Sync In /Out Pins Align DPWM Clocks
Between Multiple UCD9240 Devices Fan Monitoring and Control 12-Bit Digital Monitoring of Power Supply
Parameters Including:
– Input Current and Voltage
– Output Current and Voltage
– Temperature at Each Power Stage Multiple Levels of Overcurrent Fault
Protection:
– External Current Fault Inputs
– Analog Comparators Monitor Current
Sense Voltage
– Current Continually Digitally Monitored Over and Undervoltage Fault Protection Overtemperature Fault Protection Enhanced Nonvolatile Memory With Error …
