RT8577 datasheet(5/12 Pages) RICHTEK

5 / 12 page

DS8577-00 November 2011

www.richtek.com

RT8577

Electrical Characteristics

(VCC = 12V, TA = 25

°C, unless otherwise specified)

Absolute Maximum Ratings

(Note 1)

Supply Voltage, VCC, STATUS ------------------------------------------------------------------------------------------ 33V

LED1 to LED4 --------------------------------------------------------------------------------------------------------------- 50V

PWM, EN, DRV, SEN, SS, VC, RT, CREG, OVP/UVP, RISET ------------------------------------------------- 5.5V

Power Dissipation, PD @ TA = 25

°C

WQFN-20L 5x5 ------------------------------------------------------------------------------------------------------------- 2.778W

Package Thermal Resistance (Note 2)

WQFN-20L 5x5,

θJA -------------------------------------------------------------------------------------------------------- 36°C/W

WQFN-20L 5x5,

θJC ------------------------------------------------------------------------------------------------------- 6°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 Mode) ----------------------------------------------------------------------------------------------- 2kV

MM (Machine Mode) ------------------------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions

(Note 4)

Supply Voltage, VCC ------------------------------------------------------------------------------------------------------- 9V to 28V

LED1 to LED4 --------------------------------------------------------------------------------------------------------------- 45V

ILED1 to ILED4 ----------------------------------------------------------------------------------------------------------------- 10mA to 200mA

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

−40°C to 125°C

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

−40°C to 85°C

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Supply Voltage

Supply Current

IVCC

Switching Off

Shutdown Current

ISHDN

VEN < 0.7V

μA

VDD LDO Output

VCREG

VDD LDO Capability

ICREG

VCC Rising

6.7

VCC UVLO Threshold

VUVLO

Hysteresis

1.4

Logic-High

VENH

1.5

EN Threshold

Voltage

Logic-Low

VENL

0.8

LED Current Programming

LED Current Accuracy

RISET = 9.1kΩ, VPWM > 1.2V

114

120

126

LED Current Matching

RISET = 9.1kΩ, VPWM > 1.2V

LEDx

LED_AVE

100%

−

±1.5

±3

LED1 to LED4 Regulation Voltage

ILED = 200mA

0.6

VLED Threshold

No Connection

0.1

RISET Pin Voltage

1.2

To be continued

RT8577 Datasheet(PDF) 5 Page - Richtek Technology Corporation

RT8577 Datasheet(HTML) 5 Page - Richtek Technology Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

Datasheet Download

Link URL