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

MP4655 Rev 1.0

www.MonolithicPower.com

6

2/2/2016

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© 2016 MPS. All Rights Reserved.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Analog Dimming

Analog dimming full scale

VIFB = 200mV

2.32

2.39

2.46

V

Dimming linearity

VIFB_ADIM

VADIM = 1.2V

100

mV

Dimming linearity

VIFB_ADIM

VADIM = 0.8V

66.8

mV

Dimming linearity

VIFB_ADIM

VADIM = 0.3V

25

mV

Dimming linearity

VIFB_ADIM

VADIM = 0.1V

8.5

mV

ADIMP logic high

VADIM_PHI

1.8

3.5

V

ADIMP logic low

VADIM_PLO

0.9

V

ADIMP pull-up resistor

RADIM_P_UP

1.5

MΩ

ADIMP disable threshold

4.7

V

PWM Dimming

PWM logic high threshold

PWM dimming

1.4

17

2

V

PWM logic input hysteresis

PWM dimming

0.6

V

Operating Frequency

Minimum frequency set voltage

IFB = 0.1V, PWMIN = high

1.65

1.73

1.83

V

Minimum operating frequency

IFB = 0.1V, PWMIN = high

42.5

kHz

Maximum operating frequency

IFB = 0.21V, PWMIN = high

130

kHz

Output PWM Dimming Signal for LED (DIMO)

Logic high voltage

Normal operation

12.5

V

Logic low voltage

At fault condition,

or PWMIN is low

0.1

V

DIMO up-side resistance

20mA drive source current

for design

62

Ω

DIMO low-side resistance

100mA drive sink current

for design

7

Ω

LED Stage Enable (EN_LED)

EN_LED logic high threshold

EN_LED rising

1.4

1.7

2

V

EN_LED logic input hysteresis

0.6

V

IC Enable Signal (PS_ON)

Threshold for IC standby

Rising edge

0.7

0.8

0.9

V

Duration time to shut down IC

1

ms

Threshold to turn on IC to

operate normally

1.9

2

2.1

V