The UCC28610 brings a new level of performance and reliability to the AC and DC consumer power supply solution.
A PWM modulation algorithm varies both the switching frequency and primary current while maintaining discontinuous or transition mode operation over the entire operating range. Combined with a cascoded architecture, these innovations result in efficiency, reliability, and system cost improvements over a conventional flyback architecture.
The UCC28610 offers a predictable maximum power threshold and a timed response to an overload, allowing safe handling of surge power requirements. Overload fault response is user-programmed for retry or latch-off mode. Additional protection features include output overvoltage detection, programmable maximum on-time, and thermal shutdown.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
UCC28610 | SOIC (8) | 4.90 mm x 3.91 mm |
PDIP (8) | 9.81 mm x 6.35 mm |
Changes from F Revision (November 2014) to G Revision
Changes from E Revision (September 2012) to F Revision
Changes from D Revision (January 2011) to E Revision
Changes from C Revision (January 2009) to D Revision
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | NO. | |||
CL | 3 | I | (Current Limit) This pin programs the peak primary inductor current that is reached each switching cycle. Program with a resistor between CL and GND. | |
DRV | 6 | O | (DRiVe) This pin drives the source of an external high voltage power MOSFET. The DRV pin carries the full primary current of the converter. Connect a Schottky diode between DRV and VDD to provide initial bias at start up. | |
FB | 1 | I | (FeedBack) The FB current, IFB, commands the operating mode of the UCC28610. The FB voltage is always 0.7 V. This pin only detects current. | |
GND | 7 | — | (GrouND) This pin is the current return terminal for both the analog and power signals in the UCC28610. This terminal carries the full primary current of the converter. Separate the return path of the bulk capacitor from the return path of FB, ZCD, MOT, and CL. | |
MOT | 4 | I | (Maximum On Time) This pin has three functions:
Functions 1 and 2 are programmed with a resistor between MOT and GND. |
|
VDD | 8 | — | This is the bias supply pin for the UCC28610. It can be derived from an external source or an auxiliary winding. This pin must be decoupled with a 0.1-μF ceramic capacitor placed between VDD and GND, as close to the device as possible. | |
VGG | 5 | — | This pin provides a DC voltage for the gate of the external high voltage MOSFET. This pin must be decoupled with a 0.1-μF ceramic capacitor placed between VGG and GND, as close to the device as possible. This pin also initiates start-up bias through a large value resistor that is connected to the input bulk voltage. | |
ZCD | 2 | I | (Zero Current Detection) This pin has two functions:
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