MP5007DQ データシートの表示（PDF） - Monolithic Power Systems

部品番号

コンポーネント説明

一致するリスト

MP5007DQ

5V, 1A- 5A Programmable Current Limit Switch

Monolithic Power Systems 

MP5007 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH

The Enable/Fault line must be above the mid

level for the output to be turned on.

The fault flag is a internal flip-flop that can be set

or reset under various conditions:

1. Thermal Shutdown: set fault flag

2. Under Voltage: reset fault flag

3. Low voltage on Enable/Fault pin: reset

fault flag

4. Mid voltage on Enable/Fault pin: no

effect

Under a fault, the Enable/Fault pin is driven to

the mid level.

There are 4 types of faults, and each fault has a

direct and indirect effect on the Enable/Fault pin

and the internal fault flag. In a typical application

there are one or more of the MP5007 chips in a

system. The Enable/Fault lines will typically be

connected together.

Fault description

Short/over current

Under Voltage

Over Voltage

Thermal Shutdown

Table3 — Fault Function Influence in Application

Internal action

Effect on Fault

Pin

Effect on

Flag

Effect on secondary Part

Limit current

Output is turned off

Limit output voltage

Shutdown part. The

part is latched off

until a UVLO or

externally driven to

ground.

none

Internally drives

Enable/Fault pin to

Logic low

None

Internally drives

Enable/Fault pin

to mid level

none

Flag is

reset

None

Flag is Set

none

Secondary part output is

disabled, and fault flag is

reset.

None

Secondary part output is

disabled.

Under Voltage Lock Out Operation

If the supply (input) is below the UVLO threshold,

the output is disabled, and the fault line is driven

low.

When the supply goes above the UVLO

threshold, the output is enabled and the fault line

is released. When the fault line is released, EN

will be pulled high by a 28uA current source. No

external pull up resistor is required. In addition,

the pull up voltage is limited to 5 volts.

Thermal Protection

When thermal protection is triggered, the output

is disabled and the fault line is driven to the mid

level. The thermal fault condition is latched

(meaning the fault flag is set), and the part will

remain latched off until the fault (enable) line is

brought low. Cycling the power below the UVLO

threshold will also reset the fault flag.

MP5007 Rev.1.1

www.MonolithicPower.com

9

9/2/2014

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2014 MPS. All Rights Reserved.

Share Link: