Datasheet > UCC19412

UCC19412

更新时间： 2024-11-27 22:40:07

品牌	Logo	应用领域
德州仪器 - TI		转换器升压转换器
页数	文件大小	规格书
8页	146K
描述
Low Power Synchronous Boost Converter

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中文翻译

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UCC19412 数据手册

application

INFO

UCC19411/2/3

UCC29411/2/3

UCC39411/2/3

PRELIMINARY

available

Low Power Synchronous Boost Converter

FEATURES

DESCRIPTION

• 1V Input Voltage Operation Start-up

Guaranteed under FULL Load on

Main Output, and Operation Down to

0.5V

The UCC39411 family of low input voltage, single inductor boost

converters is optimized to operate from a single or dual alkaline cell, and

steps up to a 3.3V, 5V, or adjustable output at 200mW. The UCC39411

family also provides an auxiliary 7V output, primarily for the gate drive

supply, which can be used for applications requiring an auxiliary output,

such as 5V, by linear regulating. The primary output will start up under full

load at input voltages typically as low as 0.8V with a guaranteed max of

1V, and will operate down to 0.5V once the converter is operating,

maximizing battery utilization.

• 200mW Output Power at Battery

Voltages as low as 0.8V

• Secondary 7V Supply from a Single

Inductor

• Output Fully Disconnected in

The UCC39411 family is designed to accommodate demanding

applications such as pagers and cell phones that require high efficiency

over a wide operating range of several milli-watts to a couple of hundred

milli-watts. High efficiency at low output current is achieved by optimizing

switching and conduction losses with a low total quiescent current (50µA).

At higher output current the 0.5Ω switch, and 1.2Ω synchronous rectifier

along with continuous mode conduction provide high power efficiency. The

wide input voltage range of the UCC39411 family can accommodate other

power sources such as NiCd and NimH.

Shutdown

• Adaptive Current Mode Control for

Optimum Efficiency

• High Efficiency over Wide Operating

Range

• 6µA Shutdown Supply Current

• Output Reset Function with

Programmable Reset Period

The 39411 family also provides shutdown control. Packages available are

the 8 pin SOIC (D), 8 pin DIP (N or J), and 8 pin TSSOP (PW) to optimize

board space.

SIMPIFIED BLOCK DIAGRAM AND APPLICATION CIRCUIT (UCC39412)

22µH

100µF

1V TO 3.5V

VIN

VGD

VOUT

3.3V 200mW

1.2Ω

100µF

START-UP

CIRCUITRY

0.5Ω

MODULATOR CONTROL CIRCUIT

RES

SYNCHRONOUS RECTIFICATION CIRCUITRY

ANTI-CROSS CONDUCTION

START-UP

MULTIPLEXING LOGIC

MAX INPUT POWER CONTROL

ADAPTIVE CURRENT CONTROL

RESB

RESET CONTROL CIRCUIT

GLITCH SUPRESSION

SD/FB

PROGRAMMABLE TIMING

GND

UDG-98067

Note: Pinout shown is for the TSSOP Package. Consult Package Descriptions for DIP and SOIC configurations.

SLUS245A - MARCH 1999

12 3 4 5 6 7 8

中文翻译

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