MP4651 datasheet(5/12 Pages) MPS

Part #	MP4651

Description	Off Line LED Driver

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Manufacturer	MPS [Monolithic Power Systems]

Direct Link	http://www.monolithicpower.com

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MP4651—OFF LINE LED DRIVER

MP4651 Rev.1.0

www.MonolithicPower.com

5

1/13/2011

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

ELECTRICAL CHARACTERISTICS (continued)

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Fault Timer (FT)

Threshold

Vth(FT)

2.2

2.4

2.6

V

Source Current

ISOURCE(FT)

8

µA

Comp

Clamp Voltage

VCOMP

0.60

V

Reference Current

ICOMP+

20

µA

Pull Down Current at Fault

Condition

ICOMP-FAULT

Fault Mode is triggered

30

µA

Burst Frequency Synchronization (SYNC)

High logic level

VSYNC-H

1.4

V

Low logic level

VSYNC-L

0.7

V

Pulse width

tsync

6

10

20

µs

Synchronizing Frequency

fSYNC

DC input burst dimming,

Compared to the

frequency fBFS set by

BFS pin R and C

110%

120%

Fault Detection Threshold (SSD, FB)

SSD Threshold

VSSD

2.22

2.36

2.55

V

SSD Detection Delay Time

TD SSD

7

µs

FB threshold

VFB th

1.1

1.2

1.3

V

FB Detection Delay Time

TDFB

7

µs

Output Gate Driver (VCC)

Voltage

VVCC

No load

8.7

9.7

10.5

V

Current

IVCC

20

mA

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