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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

鈥?/div>

100

碌

A Typical Starting Supply Current

鈥?/div>

500

碌

A Typical Operating Supply

Current

鈥?/div>

Operation to 1MHz

鈥?/div>

Internal Soft Start

鈥?/div>

Internal Fault Soft Start

鈥?/div>

Internal Leading-Edge Blanking of the

Current Sense Signal

鈥?/div>

1 Amp Totem-Pole Output

鈥?/div>

70ns Typical Response from

Current-Sense to Gate Drive Output

鈥?/div>

1.5% Tolerance Voltage Reference

鈥?/div>

Same Pinout as UC3842 and

UC3842A

Part Number

UCCx800

UCCx801

UCCx802

UCCx803

UCCx804

UCCx805

DESCRIPTION

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.

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.

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

critical 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.

The UCC180x series is specified for operation from 鈥?5 C to +125 C,

o

the UCC280x series is specified for operation from 鈥?0 C to +85 C, and

o

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

o

Maximum Duty Cycle

100%

50%

100%

50%

Reference Voltage

5V

4V

5V

4V

Turn-On Threshold

7.2V

9.4V

12.5V

4.1V

12.5V

4.1V

Turn-Off Threshold

6.9V

7.4V

8.3V

3.6V

8.3V

3.6V

BLOCK DIAGRAM

UDG92009-3

SLUS270C

- MARCH 1999 - REVISED JANUARY 2005

標(biāo)準(zhǔn)包裝
75
類(lèi)別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 切換控制器
系列
-
PWM 型
電流模式
輸出數(shù)
1
頻率 - 最大
1MHz
占空比
50%
電源電壓
3.6 V ~ 12 V
降壓
無(wú)
升壓
是
回掃
是
反相
無(wú)
倍增器
無(wú)
除法器
無(wú)
Cuk
無(wú)
隔離
無(wú)
工作溫度
-40°C ~ 85°C
封裝/外殼
8-SOIC（0.154"，3.90mm 寬）
包裝
管件

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UCC2805DG4 Datasheet

PDF預(yù)覽

UCC2805DG4 產(chǎn)品屬性

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