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UCC2806M
Low Power, Dual Output, Current Mode PWM Controller
UCC1806UCC2806UCC3806SLUS272F-- FEBRUARY 2000-- REVISED AUGUST 2006
LOW- POWER, DUAL-OUTPUT,CURRENT-MODE PWM CONTROLLER
FEATURES BiCMOS Versionof UC3846 Family 1.4-mA Maximum Operating Current 100-μA Maximum Startup Current ±0.5-A
Peak Output Current 125-ns Circuit Delay Easier Parallelability Improved Benefitsof Current Mode Control
DESCRIPTIONThe UCC3806familyofBiCMOS PWM controllersoffers exceptionally improved performance withafamiliararchitecture. Withthe same block diagramand pinoutof the popular UC3846 series, theUCC3806 line features increased switchingfrequency capability while greatly reducing thebias current used within the device. Witha typicalstartup currentof50 μA anda well defined voltagethreshold for turn-on, these devices are favored
for applications ranging from off-line powersuppliesto battery operated portable equipment.Dual high-current,MOSFET drivingoutputs andafast current sense loop further enhance deviceversatility.
All the benefitsof current mode control includingsimpler loop closing, voltage feed-forward,parallelabilitywith current sharing,pulse-by-pulsecurrent limiting, and push/pull symmetrycorrection are readily achievable with theUCC3806 series.
These devices are availablein multiple packageoptions for both through-hole and surface mountapplications; andin commercial, industrial, andmilitary temperature ranges.
The UCC1806is specified for operation from--55°Cto 125°C, the UCC2806is specified foroperation from- -40°Cto85°C, and the UCC3806is specified for operation from 0°Cto70°C.
SIMPLIFIED APPLICATION DIAGRAM
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