MAX16838AUP datasheet(3/21 Pages) MAXIM

Part #	MAX16838AUP

Description	Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

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Manufacturer	MAXIM [Maxim Integrated Products]

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Integrated, 2-Channel, High-Brightness LED Driver

with High-Voltage Boost and SEPIC Controller

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VEN = 12V, RRT = 12.2kI, RISET = 15kI, CVCC = 1FF, VCC = VDRV = VCFB, DRAIN, COMP, OUT_, FLT = unconnected, VOV

= VCS = VLEDGND = VDIM = VPGND = VSGND = 0V, VGATE = VNDRV, TA = TJ = -40NC to +125NC, unless otherwise noted. Typical

values are at TA = 25NC.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Oscillator Frequency Accuracy

fSW = 200kHz to 2MHz

-7.5

+7.5

%

Synchronization Logic-High

VRT rising

1.8

3.6

V

Synchronization Logic-Low

VRT falling

2.5

V

Logic-Level Before SYNC

Capacitor

3.1

3.8

V

Synchronization Pulse Width

50

ns

SYNC Frequency Range

fSYNC

1.1 x

fSW

1.5 x

fSW

Hz

PWM COMPARATOR

Leading-Edge Blanking

66

ns

Propagation Delay to NDRV

Including leading-edge blanking time

100

ns

SLOPE COMPENSATION

Slope Compensation Peak

Voltage per Cycle

Voltage ramp added to CS

0.12

V

CS LIMIT COMPARATOR

CS Threshold Voltage

VCS_MAX VCOMP = 3V

285

300

315

mV

CS Limit Comparator Propagation

Delay to NDRV

10mV overdrive (including leading-edge

blanking time)

100

ns

CS Input Current

ICS

0 P VCS P 0.35V

-1.3

+0.5

F

A

ERROR AMPLIFIER

OUT_ Regulation Voltage

VDIM = 5V

0.9

1

1.1

V

Transconductance

Gm

340

600

880

F

S

No-Load Gain

A

(Note 4)

50

dB

COMP Sink Current

ISINK

VDIM = VOUT_ = 5V, VCOMP = 3V

400

800

F

A

COMP Source Current

ISOURCE

VDIM = 5V, VOUT_ = VCOMP = 0V

400

800

F

A

MOSFET DRIVER

NDRV On-Resistance

ISINK = 100mA, VIN > 5.5V

1.5

4

I

ISOURCE = 100mA, VIN > 5.5V

1.5

4

I

Peak Sink Current

VNDRV = 5V

0.8

A

Peak Source Current

VNDRV = 0V

0.8

A

POWER MOSFET

Power Switch On-Resistance

ISWITCH = 0.5A, VGS = 5V

0.15

0.35

I

Switch Leakage Current

VDRAIN = 40V, VGATE = 0V

0.003

1.2

F

A

Switch Gate Charge

VDRAIN = 40V, VGS = 4.5V

3.1

nC

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