UCC2808AD-1

更新时间： 2024-11-27 22:59:31

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
10页	160K
描述
LOW POWER CURRENT MODE PUSH-PULL PWM

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中文翻译

获取价格

数据手册
替代型号

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UCC2808AD-1 数据手册

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SLUS456D – APRIL 1999 - REVISED AUGUST 2002

D OR N PACKAGE

(TOP VIEW)

Dual Output Drive Stages in Push-Pull

Configuration

Current Sense Discharge Transistor to

Improve Dynamic Response

VDD

COMP

OUTA

OUTB

GND

130-µA Typical Starting Current

1-mA Typical Run Current

Operation to 1 MHz

Internal Soft Start

PW PACKAGE

(TOP VIEW)

On-Chip Error Amplifier With 2-MHz Gain

Bandwidth Product

OUTA

VDD

COMP

OUTB

GND

On Chip VDD Clamping

Output Drive Stages Capable of 500-mA

Peak-Source Current, 1-A Peak-Sink Current

description

The UCC3808A is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC3808A

contains all of the control and drive circuitry required for off-line or dc-to-dc fixed frequency current-mode switching

power supplies with minimal external parts count.

The UCC3808A dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half the

oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns

depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle to less than

50%.

block diagram

COMP

VDD

OVERCURRENT

COMPARATOR

22 k

Ω

PEAK CURRENT

COMPARATOR

14 V

0.75 V

2.0 V

0.5 V

2.2 V

OUTA

VDD OK

OSCILLATOR

PWM

LATCH

1.2R

VDD–1 V

PWM

COMPARATOR

VDD

0.5 V

SOFT START

OUTB

GND

VOLTAGE

REFERENCE

SLOPE = 1 V/ms

Note: Pinout shown is for SOIC and PDIP packages. TSSOP pinout is different.

UDG-00097

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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中文翻译

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UCC2808AD-1 替代型号

型号	品牌	替代类型	描述	数据表
UCC2808ADTR-1G4	TI	类似代替	具有放电晶体管、12.5/8.3V UVLO、温度范围为 -40°C 至 85°C 的低功
UCC2808AD-1G4	TI	类似代替	Low-Power Current-Mode Push-Pull PWM 8-SOIC -40 to 85
UCC2808ADTR-1	TI	类似代替	LOW POWER CURRENT MODE PUSH-PULL PWM

与UCC2808AD-1相关器件

型号	品牌	获取价格	描述	数据表
UCC2808AD-1G4	TI	获取价格	Low-Power Current-Mode Push-Pull PWM 8-SOIC -40 to 85
UCC2808AD-1Q1	TI	获取价格	LOW POER CURRENT MODE PUSH-PULL PWM
UCC2808AD-2	TI	获取价格	LOW POWER CURRENT MODE PUSH-PULL PWM
UCC2808AD-2G4	TI	获取价格	具有放电晶体管、4.3/4.1V UVLO、温度范围为 -40°C 至 85°C 的低功耗
UCC2808AD-2Q1	TI	获取价格	LOW POER CURRENT MODE PUSH-PULL PWM
UCC2808ADTR-1	TI	获取价格	LOW POWER CURRENT MODE PUSH-PULL PWM
UCC2808ADTR-1G4	TI	获取价格	具有放电晶体管、12.5/8.3V UVLO、温度范围为 -40°C 至 85°C 的低功
UCC2808ADTR-2	TI	获取价格	LOW POWER CURRENT MODE PUSH-PULL PWM
UCC2808ADTR-2G4	TI	获取价格	具有放电晶体管、4.3/4.1V UVLO、温度范围为 -40°C 至 85°C 的低功耗
UCC2808AN-1	TI	获取价格	LOW POWER CURRENT MODE PUSH-PULL PWM

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