Datasheet > UCC280000N

UCC280000N

更新时间： 2024-02-04 15:20:10

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其他 - ETC		模拟IC
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8页	239K
描述
Analog IC

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技术参数
数据手册

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UCC280000N 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.84	Is Samacsys：	N
Base Number Matches：	1

UCC280000N 数据手册

UCC1800/1/2/3/4/5

UCC2800/1/2/3/4/5

UCC3800/1/2/3/4/5

Low-Power BiCMOS Current-Mode PWM

FEATURES

DESCRIPTION

• 100µA Typical Starting Supply Current

The UCC1800/1/2/3/4/5 family of high-speed, low-power integrated cir-

cuits contain all of the control and drive components required for off-line

and DC-to-DC fixed frequency current-mode switching power supplies

with minimal parts count.

• 500µA Typical Operating Supply

Current

• Operation to 1MHz

• Internal Soft Start

These devices have the same pin configuration as the UC1842/3/4/5

family, and also offer the added features of internal full-cycle soft start

and internal leading-edge blanking of the current-sense input.

• Internal Fault Soft Start

The UCC1800/1/2/3/4/5 family offers a variety of package options, tem-

perature range options, choice of maximum duty cycle, and choice of crit-

ical voltage levels. Lower reference parts such as the UCC1803 and

UCC1805 fit best into battery operated systems, while the higher refer-

ence and the higher UVLO hysteresis of the UCC1802 and UCC1804

make these ideal choices for use in off-line power supplies.

• Internal Leading-Edge Blanking of the

Current Sense Signal

• 1 Amp Totem-Pole Output

• 70ns Typical Response from

Current-Sense to Gate Drive Output

The UCC180x series is specified for operation from –55 C to +125 C,

• 1.5% Tolerance Voltage Reference

the UCC280x series is specified for operation from –40 C to +85 C, and

the UCC380x series is specified for operation from 0 C to +70 C.

• Same Pinout as UC3842 and

UC3842A

Part Number

UCCx800

UCCx801

UCCx802

UCCx803

UCCx804

UCCx805

Maximum Duty Cycle

Reference Voltage

Turn-On Threshold

Turn-Off Threshold

100%

50%

7.2V

9.4V

6.9V

7.4V

8.3V

3.6V

8.3V

3.6V

100%

50%

12.5V

4.1V

12.5V

4.1V

50%

BLOCK DIAGRAM

UDG92009-3

03/99

12 3 4 5 6 7 8

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