See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

DGK | 8

Temp:

I (-40 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

UCC2809P-2


Economy Primary Side Controller

TI Store Price:

 
 
Qty.Price
1 - 9 $ 2.75
10 - 24 $ 2.48
25 - 99 $ 2.26
100 - 249 $ 2.04
250 - 499 $ 1.84
500 - 749 $ 1.55
750 - 999 $ 1.31
1000 - 9999 $ 1.10

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Texas Instruments UCC2809P-2

The UCC3809 family of BCDMOS economy low power integrated circuits contains all 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 accessible voltage reference, logic to ensure latched operation, a PWM comparator, and a totem pole output stage to sink or source peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.

Oscillator frequency and maximum duty cycle are programmed with two resistors and a 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 systems as shown in the table to the left.

The UCC3809 and the UCC2809 are offered in the 8 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 are at a premium.

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