MP4658 – 4-STRING, 80V RETURN LED DRIVER WITH AC/DC FEEDBACK

MP4658 Rev. 1.0

MonolithicPower.com

4

10/13/2021

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ELECTRICAL CHARACTERISTICS

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

Parameter

Symbol

Condition

Min

Typ

Max

Units

VIN Supply

VIN supply range

6

36

V

VIN UVLO

VIN_UVLO

4.5

4.79

5.5

V

VIN UVLO hysteresis

VIN_HYS_UVLO

500

mV

Quiescent current

IQ

PWM = ADIM = 0

0.5

mA

Analog Dimming

ADIM logic high

VADIM_HI

1.5

V

ADIM logic low

VADIM_LO

0.4

V

ADIM/PWM pull-down resistor

RADIM_DOWN

1

M

Ω

Analog dimming input

frequency range

5 (5)

100 (5)

kHz

Duration to disable the ADIM

pin

tADIM_ST

30

ms

ADIM pin input impedance for

slow soft PWM dimming (3ms)

25

50

k

Ω

ADIM pin input impedance for

fast soft PWM dimming (700µs)

15

k

Ω

PWM Dimming

PDIM logic high

VPDIM_HI

1.5

V

PDIM logic low

VPDIM_LO

0.4

V

PDIM pull-down resistor

RPDIM_DOWN

1

M

Ω

PDIM input frequency range

100 (5)

Hz

Duration to disable the PDIM

pin

tPDIM_ST

30

ms

OPT

OPT pin output voltage range

Normal operation H

2.3

V

Normal operation L

0.8

V

OPT pin output voltage when

latched off

3.3

V

Source current capability

IOPT

20

mA

VFB

Reference voltage

VFB_REF

PWM off

1.182

1.2

1.218

V

FB pull-down resistor

RFB_DOWN

1

M

Ω

VFB over-voltage protection

(OVP)

VFB_OVP

1.24

VREF_VFB

System open feedback

protection

VREF_OPEN

500

mV

Compensation Loop for LED (COMP1)

Gain bandwidth product

GBCOMP1

75pF on COMP1

1 (5)

MHz

Open-loop DC gain

AV_COMP1

COMP1 open

70 (5)

dB

Input common-mode range

VCM_COMP1

For design

-0.3 (5)

+4 (5)

V

Transconductance

GM_COMP1

PWM = high

720

μA/V