MP4655–PURE, SINGLE-STAGE, LLC, LED CURRENT AND SYSTEM VOLTAGE CONTROLLER

MP4655 Rev 1.0

www.MonolithicPower.com

8

2/2/2016

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Parameter

Symbol

Condition

Min

Typ

Max

Units

Internal Voltage Loop Compensation Transconductance Op-Amp for Extra MOSFET Control (DCOMP)

Low-level clamp voltage

Normal operation,

VOCP = 0V

0.41

V

High-level clamp votlage

Normal operation,

VOCP = 0V

2.1

V

Transconductance

150

μA/V

Saturated output current

30

50

70

μA

Bus Voltage Stage Current Detection (VOCP)

VOCP detection threshold

-230

-203

-176

mV

VOCP delay time

OCP < -200mV

7

µs

Over LED Voltage Protection (VLED1, VLED2)

Over LED voltage protection

threshold

2.33

2.41

2.49

V

Over LED voltage delay time

8

μs

Gain of differential voltage

protection

14

16.

18

Internal resistance

16

20

24

kΩ

Over LED voltage to latch up

LLC

2.85

3

3.15

V

Duration time to latch up

7.6

μs

Burst Mode (Pulse Skipping) Threshold at Normal Operation (VCOMP, ICOMP, VFB, IFB)

VCOMP threshold for burst

mode

PS_ON = H,

1.05

1.1

1.15

V

VCOMP hysteresis for burst

mode

PS_ON = H

80

100

120

mV

VFB threshold for burst mode

PS_ON = H

1.05

VFB reset threshold for burst

mode

0.95

ICOMP

threshold

for

burst

mode

PS_ON = H,

1.05

1.12

1.18

V

ICOMP hysteresis for burst

mode

100

mV

IFB threshold for burst mode

PS_ON = H

1.08

(6)

IFB reset threshold for burst

mode

0.92

(6)