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DESCRIPTION (continued)

SIMPLIFIED APPLICATION DIAGRAMS

UCD8220, UCD8620

SLUS652B – MARCH 2005 – REVISED SEPTEMBER 2005

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.

Figure 2. UCD8220 Typical Simplified Half-Bridge Converter Application Schematic

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