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DESCRIPTION (continued)
SIMPLIFIED APPLICATION DIAGRAMS
UCD8220
SLUS652D – MARCH 2005 – REVISED OCTOBER 2006
The UCD8220 can be configured for either peak current mode or voltage mode control. It provides 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 stage uses the TrueDrive™
architecture, which delivers rated current of 4 A into the gate of a MOSFET. Finally it also includes a 3.3-V,
10-mA linear regulator to provide power to the digital controller or act as a reference in the system.
The UCD8220 controller 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.
Figure 2. UCD8220 Typical Simplified Half-Bridge Converter Application Schematic
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