Datasheet > UCC2941J-ADJ

UCC2941J-ADJ

更新时间： 2024-11-19 23:39:03

品牌	Logo	应用领域
其他 - ETC		开关信息通信管理控制器
页数	文件大小	规格书
11页	227K
描述
Current-Mode SMPS Controller

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中文翻译

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UCC2941J-ADJ 数据手册

application

INFO

UCC2941-3/-5/-ADJ

UCC3941-3/-5/-ADJ

available

1V Synchronous Boost Converter

FEATURES

DESCRIPTION

• 1V Input Voltage Operation Startup

Guaranteed Under Full Load on Main

Output With Operation Down to 0.4V

The UCC3941 family of low input voltage single inductor boost converters

are optimized to operate from a single or dual alkaline cell, and step up to

a 3.3V, 5V, or an adjustable output at 500mW. The UCC3941 family also

provides an auxiliary 9V 100mW output, primarily for the gate drive supply,

which can be used for applications requiring an auxiliary output such as a

5V supply by linear regulating. The primary output will start up under full

load at input voltages typically as low as 0.8V, with a guaranteed maximum

of 1V, and will operate down to 0.4V once the converter is operating, maxi-

mizing battery utilization.

• Input Voltage Range of 1V to V_OUT

0.5V

• 500mW Output Power at Battery

Voltages as Low as 0.8V

• Secondary 9V Supply From a Single

Inductor

Demanding applications such as Pagers and PDA’s require high efficiency

from several milli-watts to several hundred milli-watts, and the UCC3941

family accommodates these applications with >80% typical efficiencies

over the wide range of operation. The high efficiency at low output current

is achieved by optimizing switching and conduction losses along with low

quiescent current. At higher output current the 0.25Ω switch, and 0.4Ω syn-

chronous rectifier, along with continuous mode conduction, provide high ef-

ficiency. The wide input voltage range on the UCC3941 family can

accommodate other power sources such as NiCd and NiMH.

• Adjustable Output Power Limit Control

• Output Fully Disconnected in

Shutdown

• Adaptive Current Mode Control for

Optimum Efficiency

• 8µA Shutdown Supply Current

Other features include maximum power control and shutdown control.

Packages available are the 8-pin SOIC (D) and 8-pin DIP (N or J).

SIMPLIFIED BLOCK DIAGRAM AND APPLICATION CIRCUIT

10µF

0.8V TO VOUT +0.5V

22µH

VIN

UCC3941-3 = 3.3V

UCC3941-5 = 5.0V

UCC3941-ADJ = 1.30V TO 6V

VOUT

VGD

0.4Ω

STARTUP

CIRCUITRY

10µF

0.25Ω

100µF

MODULATOR CONTROL CIRCUIT

SYNCHRONOUS RECTIFICATION CIRCUITRY

ANTI-CROSS CONDUCTION

STARTUP

MULTIPLEXING LOGIC

MAXIMUM INPUT POWER CONTROL

ADAPTIVE CURRENT CONTROL

PLIM

*SGND/FB

OPEN=SD

UCC3941-ADJ

1.25V

–

PGND

*FOR UCC3941-ADJ ONLY:

PIN 7 = SGND & PGND, PIN 6 = OUTPUT SENSE FEEDBACK, FB.

UDG-98147

SLUS242 - JULY 1999

12 3 4 5 6 7...11

中文翻译

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与UCC2941J-ADJ相关器件

型号	品牌	获取价格	描述	数据表
UCC2941N-3	ETC	获取价格	Current-Mode SMPS Controller
UCC2941N-3G4	ROCHESTER	获取价格	Switching Regulator, Current-mode, 1.3A, 200kHz Switching Freq-Max, BICMOS, PDIP8, DIP-8
UCC2941N-3G4	TI	获取价格	1.3A SWITCHING REGULATOR, 200kHz SWITCHING FREQ-MAX, PDIP8, DIP-8
UCC2941N-5	ETC	获取价格
UCC2941N-ADJ	ROCHESTER	获取价格	Switching Regulator, Current-mode, 0.2A, 200kHz Switching Freq-Max, BICMOS, PDIP8, PLASTIC
UCC29421	TI	获取价格	Multimode High Frequency PWM Controller
UCC29421N	TI	获取价格	Multimode High Frequency PWM Controller
UCC29421PW	TI	获取价格	Multimode High Frequency PWM Controller
UCC29421PWR	ETC	获取价格	Analog IC
UCC29421PWTR	TI	获取价格	Multimode High Frequency PWM Controller

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