RT8498 datasheet(3/12 Pages) RICHTEK

Part #	RT8498

Description	8V Multi-Topology LED Driver with Dimming Control

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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RT8498

3

DS8498-01 April 2017

www.richtek.com

©

is a registered trademark of Richtek Technology Corporation.

Electrical Characteristics

Recommended Operating Conditions

(Note 4)



Supply Input Voltage, VCC ----------------------------------------------------------------------------------------------- 3V to 18V



Junction Temperature Range ---------------------------------------------------------------------------------------------

−40°C to 125°C



Ambient Temperature Range ---------------------------------------------------------------------------------------------

−40°C to 85°C

Absolute Maximum Ratings

(Note 1)



Supply Input Voltage, VCC -----------------------------------------------------------------------------------------------

−0.3V to 21V



SW Pin Voltage at Switching Off, ISN ---------------------------------------------------------------------------------

−0.3V to 21V



DCTL, ACTL Pin Voltage --------------------------------------------------------------------------------------------------

−0.3V to 21V



Power Dissipation, PD @ TA = 25

°C

SOT-23-6 --------------------------------------------------------------------------------------------------------------------- 0.48W



Package Thermal Resistance (Note 2)

SOT-23-6,

θJA ---------------------------------------------------------------------------------------------------------------- 208.2°C/W



Junction Temperature ------------------------------------------------------------------------------------------------------ 150

°C



Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260

°C



Storage Temperature Range ---------------------------------------------------------------------------------------------

−65°C to 150°C



ESD Susceptibility (Note 3)

HBM (Human Body Model) ----------------------------------------------------------------------------------------------- 2kV

(VCC = 12V, No Load on any Output, TA = 25

°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Overall

Supply Current

IVCC

--

3

mA

VIN Under Voltage Lockout

Threshold

VUVLO

VIN rising

2.1

2.55

3

V

VIN falling

1.8

2.2

2.6

Shutdown Current

ISHDN

VDCTL < 0.1V

--

10

A

Enable Voltage

Logic-High

VDCTL_H

0.65

--

V

Logic-Low

VDCTL_L

--

0.2

Current Sense Amplifier

Input Threshold (VVCC  VISN)

VACTL  1.25V

96

100

104

mV

Input Current

IISN

VISN = 12V

--

20

--

A

LED Dimming

Analog Dimming ACTL Pin Input

Current

IACTL

0.65

 VACTL  3V

2

--

A

LED Maximum Current on

Threshold at ACTL

VACTL_ON

(VVCC  VISN) = 100mV

--

1.33

1.4

V

LED Current Off Threshold at

ACTL

VACTL_OFF

0.57

0.65

0.72

V

DCTL Input Current

IDCTL

0.3V

 VDCTL  5V

--

0.5

--

A

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