MP3383

– 4-STRING, MAX 80V VOUT, STEP-UP WLED CONTROLLER

MP3383 Rev. 1.0

MonolithicPower.com

6

5/2/2022

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

© 2022 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VIN = 15V, VEN = 5V, TA = 25°C, unless otherwise noted.

Parameters

Symbol

Condition

Min

Typ

Max

Unit

General

Operating input voltage

VIN

6

33

V

Quiescent supply current

IQ

VIN = 15V, no switching

3

4

mA

Shutdown supply current

IST

VEN = 0V, VIN = 15V

1

μA

Low-dropout (LDO) output

voltage

VCC

13V < VIN, 0 < ICC < 10mA

10.5

12

13.5

V

VCC under-voltage lockout

(UVLO) threshold

VCC_UVLO

Rising edge

4.5

5

5.5

V

VCC UVLO hysteresis

threshold

500

mV

Enable (EN) high threshold

VEN_HIGH

VEN rising

1.2

V

EN low threshold

VEN_LOW

VEN falling

0.4

V

Step-Up Converter

Gate driver sourcing

impedance

VCC = 12V,VGATE = 12V

4

Ω

Gate driver sinking

impedance

VCC = 12V, IGATE = 10mA

3.4

Ω

Switching frequency

fSW

ROSC = 100k

Ω

450

500

550

kHz

OSC pin voltage

VOSC

ROSC = 100k

Ω, fSW = 500kHz

0.75

0.8

0.85

V

Maximum duty cycle

DMAX

ROSC = 100k

Ω, fSW = 500kHz

89

%

Cycle-by-cycle ISENSE

current limit

Duty = 89%

160

200

mV

Latch-off ISENSE current limit

500

mV

COMP source current limit

ICOMP_SOLI

1V < COMP < 2.7V

75

μA

COMP sink current limit

ICOMP_SILI

1V < COMP < 2.7V

15

μA

COMP transconductance

GCOMP

ΔICOMP = ±10µA

400

μA/V

Current Dimming

PWM input low threshold

VPWM_LO

VPWM falling

0.4

V

PWM input high threshold

VPWM_HI

VPWM rising

1.2

V

ADIM input low threshold

VADIM_LO

VADIM falling

0.4

V

ADIM input high threshold

VADIM_HI

VADIM rising

1.2

V

Current Regulation

ISET pin voltage

VISET

1.17

1.2

1.23

V

LEDx average current

ILED

RISET = 13.33

kΩ, analog and

PWM dimming duty cycle = 100%

87

90

93

mA

RISET = 12

kΩ, PWM dimming duty

cycle = 100%, analog dimming

duty cycle = 5%

5

6

7

mA

Current matching (6)

RISET = 13.33

kΩ, analog and

PWM dimming duty cycle =

100%, ILED = 90mA

1.8

%

RISET = 12

kΩ, PWM dimming duty

cycle = 100%, analog dimming

duty cycle = 5%, ILED = 5mA

5.5

%

LEDx regulation voltage

ILED = 100mA

250

mV

ILED = 300mA

450

mV