Datasheet > UCC2920J

UCC2920J

更新时间： 2024-02-22 13:37:23

品牌	Logo	应用领域
德州仪器 - TI		信息通信管理
页数	文件大小	规格书
7页	243K
描述
1-CHANNEL POWER SUPPLY SUPPORT CKT

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UCC2920J 技术参数

是否无铅：	含铅	生命周期：	Obsolete
包装说明：	,	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.72	可调阈值：	NO
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT	信道数量：	1
功能数量：	1	最高工作温度：	85 °C
最低工作温度：	-40 °C	认证状态：	Not Qualified
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	3 V
标称供电电压 (Vsup)：	5 V	技术：	BICMOS
温度等级：	INDUSTRIAL	Base Number Matches：	1

UCC2920J 数据手册

UCC2920

UCC3920

PRELIMINARY

–3V to –15V Hot Swap Power Manager

FEATURES

DESCRIPTION

•

Integrated 0.1Ω

The UCC3920 Low RDSon Hot Swap Power Manager provides complete power man-

agement, hot swap capability, and circuit breaker functions. The only component

needed to operate the device, other than supply bypassing, is the fault timing capaci-

tor, CT. All control and housekeeping functions are integrated and externally program-

mable. These include the fault current level, maximum output sourcing current, maxi-

mum fault time, and start up delay. In the event of a constant fault, the internal fixed

2% duty cycle ratio limits the average output power.

Power MOSFET

•

–3V to –15V Operation

Programmable

Electronic Circuit

Breaker

•

Digital Programmable

Current Limit from 0A

to 3A

The internal 3 bit DAC allows programming of the fault level current from 0mA to

500mA with 250mA resolution, and from 500mA to 3A with 500mA resolution. The

IMAX control pin sets the maximum sourcing current to 1A above the fault level when

driven low, and to a full 4A when driven high for applications which require fast output

charging.

Programmable

Maximum Output

Current from 0A to 4A

When the output current is below the fault level, the output MOSFET is switched on

with a nominal resistance of 0.1Ω. When the output current exceeds the fault level or

the maximum sourcing level, the output remains on, but the fault timer starts charging

CT. Once CT charges to a preset threshold, the switch is turned off, and remains off

for 50 times the programmed fault time. When the output current reaches the maxi-

mum sourcing level, the MOSFET transitions form a switch to a constant current

source, regulating the output current at a constant level.

•

Programmable On

Time

Fixed 2% Fault Duty

Cycle

•

Thermal Shutdown

Other features include an Open Drain Fault Output Indicator, Thermal Shutdown, Un-

dervoltage Lockout, –3V to –15V operation, and a low thermal resistance Small Out-

line Power Package. All level shifting is done internally, which means that the DAC,

IMAX and Shutdown Inputs can be driven form the logic supply. The fault output is

also referenced to the logic GND, so this can easily interface back to the logic supply.

Fault Output Indicator

Power SOIC Package

BLOCK DIAGRAM

UDG-96235-1

4/97

12 3 4 5 6 7

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