UCC3917

更新时间： 2024-11-19 22:52:39

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
9页	230K
描述
Positive Floating Hot Swap Power Manager

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中文翻译

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数据手册

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UCC3917 数据手册

application

INFO

UCC1917

UCC2917

UCC3917

available

Positive Floating Hot Swap Power Manager

FEATURES

DESCRIPTION

• Manages Hot Swap of 15V and

The UCC3917 family of positive floating hot swap managers provides complete

power management, hot swap, and fault handling capability. The voltage limita-

tion of the application is only restricted by the external component voltage limi-

tations. The IC provides its own supply voltage via a charge pump off of VOUT.

The onboard 10V shunt regulator protects the IC from excess voltage. The IC

also has catastrophic fault indication to alert the user that the ability to shut off

the output NMOS has been bypassed. All control and housekeeping functions

are integrated and externally programmable. These include the fault current

level, maximum output sourcing current, maximum fault time, soft start time,

and average NMOS power limiting.

Above

• Precision Fault Threshold

• Programmable Average Power

Limiting

• Programmable Linear Current

Control

• Programmable Overcurrent Limit

• Programmable Fault Time

The fault level across the current sense amplifier is fixed at 50mV to minimize

total drop out. Once 50mV is exceeded across the current sense resistor, the

fault timer will start. The maximum allowable sourcing current is programmed

with a voltage divider from the VREF/CATFLT pin to generate a fixed voltage

on the MAXI pin. The current level at which the output appears as a current

source is equal to VMAXI divided by the current sense resistor. If desired, a con-

trolled current startup can be programmed with a capacitor on MAXI.

• Internal Charge Pump to Control

External NMOS Device

• Fault Output and Catastrophic

Fault Indication

• Fault Mode Programmable to

Latch or Retry

When the output current is below the fault level, the output device is switched

on with full gate drive. When the output current exceeds the fault level, but is

less than maximum allowable sourcing level programmed by MAXI, the output

remains switched on, and the fault timer starts charging CT. Once CT charges

to 2.5V, the output device is turned off and attempts either a retry sometime

later or waits for the state on the LATCH pin to change if in latch mode. When

the output current reaches the maximum sourcing current level, the output de-

vice appears as a current source.

• Shutdown Control

• Undervoltage Lockout

BLOCK DIAGRAM

VDD

LATCH

PLIM

UVLO

>10V=ENABLE

< 6V=DISABLE

40µA

VDD

40µA

DISABLE

SHTDWN 12

VOUT

OUTPUT

VOUT

OUTPUT

LOW

VOUT

FLTOUT 11

C1P

OVER

CURRENT

REFERENCE

50mV

COMPARATOR

LOGIC

SUPPLY

SENSE

VOUT

ON-TIME

DELAY

C1N

C2P

C2N

10 CT

200mV

VREF/CATFLT

MAXI

UDG-99055

VSS

SLUS203A - AUGUST 1999

12 3 4 5 6 7...9

中文翻译

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与UCC3917相关器件

型号	品牌	获取价格	描述	数据表
UCC3917D	TI	获取价格	Positive Floating Single, Hot-Swap IC Commercial Temp. 16-SOIC 0 to 70
UCC3917DG4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
UCC3917DTR	TI	获取价格	Positive Floating Single, Hot-Swap IC Commercial Temp. 16-SOIC 0 to 70
UCC3917DTRG4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
UCC3917J	TI	获取价格	Positive Floating Hot-Swap Power Manager
UCC3917N	TI	获取价格	Positive Floating Single, Hot-Swap IC Commercial Temp. 16-PDIP 0 to 70
UCC3918	TI	获取价格	Low On Resistance Hot Swap Power Manager
UCC3918DP	TI	获取价格	LOW ON-RESISTANCE HOT SWAP POWER MANAGER
UCC3918DP	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, SOIC-16
UCC3918DPTR	TI	获取价格	LOW ON-RESISTANCE HOT SWAP POWER MANAGER

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