UCC3809-2

Name: UCC3809-2
Brand: TI
SKU: UCC3809-2
Price: 1.088 USD

활성

15V/8V UVLO, 0C~70C를 지원하는 경제적인 1차측 컨트롤러

지금 주문

데이터 시트

document-pdfAcrobat Economy Primary Side Controller datasheet (Rev. B) (영어)

UCC3809-2

활성

데이터 시트

지금 주문

제품 상세 정보

Vin (max) (V)

19

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Buck, Flyback, Forward

Rating

Catalog

Features

Adjustable switching frequency, Multi-topology, Soft start

Duty cycle (max) (%)

70

Vin (max) (V)

19

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Buck, Flyback, Forward

Rating

Catalog

Features

Adjustable switching frequency, Multi-topology, Soft start

Duty cycle (max) (%)

70

SOIC (D)

8

29.4 mm² 4.9 x 6

TSSOP (PW)

8

19.2 mm² 3 x 6.4

VSSOP (DGK)

8

14.7 mm² 3 x 4.9

User Programmable Soft Start With Active Low Shutdown
User Programmable Maximum Duty Cycle
Accessible 5V Reference
Undervoltage Lockout
Operation to 1MHz
0.4A Source/0.8A Sink FET Driver
Low 100µA Startup Current

User Programmable Soft Start With Active Low Shutdown
User Programmable Maximum Duty Cycle
Accessible 5V Reference
Undervoltage Lockout
Operation to 1MHz
0.4A Source/0.8A Sink FET Driver
Low 100µA Startup Current

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.

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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