UCC2809DTR-1 ,1FEATURES DESCRIPTION• User Programmable Soft Start With The UCC3809 family of BCDMOS economy low po ..
UCC2809DTR-1G4 ,Economy Primary Side Controller 8-SOIC -40 to 85features full cycle soft• Low 100µA Startup Currentstart.The family has UVLO thresholds and hystere ..
UCC2809DTR-2 ,1FEATURES DESCRIPTION• User Programmable Soft Start With The UCC3809 family of BCDMOS economy low po ..
UCC2809DTR-2G4 ,Economy Primary Side Controller 8-SOIC -40 to 85features full cycle soft• Low 100µA Startup Currentstart.The family has UVLO thresholds and hystere ..
UCC2809P-1 ,1ELECTRICAL CHARACTERISTICS : Unless otherwise specified, C = 0.47 F, VDD = 12V. T =T .VREF A JPARA ..
UCC2809PTR-1 ,1features full cycle soft• Low 100µA Startup Currentstart.The family has UVLO thresholds and hystere ..
UPA101G-E1 ,12ⅴ8 CROSSPOINT SWITCH WITH CONTROL MEMORYApplications include a multiplier,double balanced mixer, phase detector, or AGC circuit. The two p ..
UPA102G ,Ultra-high-frequency NPN transistor arrayapplicationsinclude: pulse pattern generators, oscillators, differential amps, high speed comparato ..
UPA102G-E1 ,Ultra-high-frequency NPN transistor arrayFEATURES• TWO BUILT-IN DIFFERENTIAL AMPLIFIER CIRCUITS: (Each Transistor has fT 9 GHz)• OUTSTANDING ..
UPA103G ,HIGH FREQUENCY NPN TRANSISTOR ARRAYFEATURES• FIVE MONOLITHIC 9 GHz fT TRANSISTORS:Two of these use a common emitter pin and can be use ..
UPA103G-E1 ,HIGH FREQUENCY NPN TRANSISTOR ARRAYFEATURES• FIVE MONOLITHIC 9 GHz fT TRANSISTORS:Two of these use a common emitter pin and can be use ..
UPA103G-E1 ,HIGH FREQUENCY NPN TRANSISTOR ARRAYAPPLICATIONSThe μPA103 is a user configurable Silicon bipolar transistor array consisting of a comm ..
UCC28091-UCC2809D-1-UCC2809D-1G4-UCC2809DTR-1-UCC2809DTR-1G4-UCC2809P-1-UCC2809PTR-1-UCC2809PTR-1G4-UCC2809PW-1-UCC2809PWTR-1-UCC2809PWTR-1G4
Economy Primary Side Controller
UCC1809-1/-2
UCC2809-1/-2
UCC3809-1/-2
FEATURES User Programmable Soft Start With
Active Low Shutdown User Programmable Maximum Duty
Cycle Accessible 5V Reference Undervoltage Lockout Operationto 1MHz 0.4A Source/0.8A Sink FET Driver Low 100µA Startup Current
Economy Primary Side Controller
TYPICAL APPLICATION DIAGRAM
DESCRIPTIONThe UCC3809 familyof BCDMOS economy low power integrated circuits
containsall the control and drive circuitry required for off-line and isolated
DC-to-DC fixed frequency current mode switching power supplies with
minimal external parts count. Internally implemented circuits include
undervoltage lockout featuring startup current less than 100µA,a user ac-
cessible voltage reference, logicto ensure latched operation,a PWM com-
parator, anda totem pole output stageto sinkor source peak current. The
output stage, suitable for driving N-Channel MOSFETs,is lowin the off
state.
Oscillator frequency and maximum duty cycle are programmed with two
resistors anda capacitor. The UCC3809 family also features full cycle soft
start.
The family has UVLO thresholds and hysteresis levels for off-line and
DC-to-DC systemsas shownin the tableto the left.
The UCC3809 and the UCC2809 are offeredin the8 pin SOIC (D), PDIP
(N), TSSOP (PW), and MSOP (P) packages. The small TSSOP and
MSOP packages make the device ideal for applications where board
space and height areata premium.
