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UC2860DW Fiches technique(PDF) 8 Page - Texas Instruments

No de pièce UC2860DW
Description  Resonant Mode Power Supply Controller
Download  10 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2860DW Fiches technique(HTML) 8 Page - Texas Instruments

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UC1860
UC2860
UC3860
OUTPUT STAGE
The two totem pole output stages can be programmed by
Mode to operate alternately or in unison. When Mode is
low the outputs alternate. During UVLO, the outputs are
low.
Extreme care needs to be exercised in the application of
these outputs. Each output can source and sink transient
currents of 2A or more and is designed for high values of
dl/dt. This dictates the use of a ground plane, shielded in-
terconnect cables, Schottky diode clamps from the output
pins to Pwr Gnd (power ground), and some series resis-
tance to provide damping. Pwr Gnd should not exceed
±0.2V from signal ground.
BYPASS NOTE
The reference should be bypassed with a 0.1
µF ceramic
capacitor from the VREF pin directly to the ground plane
near the Signal Ground pin. The timing capacitors on
CVFO and RC should be treated likewise. VCC, however,
should be bypassed with a ceramic capacitor from the
VCC pin to the section of ground plane that is connected
to Power Ground. Any required bulk reservoir capacitor
should parallel this one. The two ground plane sections
can then be joined at a single point to optimize noise re-
jection and minimize DC drops.
Output Saturation Voltage vs Load Current
Output Saturation Voltage vs Load Current
Output Rise & Fall Time vs Load Capacitance
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD.
• MERRIMACK, NH 03054
TEL. 603-424-2410
• FAX 603-424-3460
8


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