UCD8220, UCD8620
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SLUS652B–MARCH 2005–REVISED SEPTEMBER 2005
DESCRIPTION (continued)
The UCD8220 and UCD8620 can be configured for either peak current mode or voltage mode control. They
provide a programmable current limit function and a digital output current limit flag which can be monitored by the
host controller to set the current limit operation. For fast switching speeds, the output stages use the TrueDrive™
architecture, which delivers rated current of ±4 A into the gate of a MOSFET. Finally they also include a 3.3-V,
10-mA linear regulator to provide power to the digital controller or act as a reference in the system.
The UCD8K controller family is compatible with the standard 3.3-V I/O ports of UCD9K digital power controllers,
DSPs, Microcontrollers, or ASICs and is offered in PowerPAD™ HTSSOP and QFN packages.
SIMPLIFIED APPLICATION DIAGRAMS
Figure 2. UCD8220 Typical Simplified Half-Bridge Converter Application Schematic
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