4

FN6570.0

May 9, 2008

Thermal Information

VIN, FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 24V

VDC, COMP, RSET, EN/PWM . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V

OVP, IIN0 - IIN7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V

LX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 36V

PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V

Above voltage ratings are all with respect to GND pin

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Thermal Resistance (Typical, Notes 1, 2)

θ

θ

24 Ld QFN . . . . . . . . . . . . . . . . . . . . . .

39

2

Thermal Characterization (Typical, Note 3)

24 Ld QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

~0.7

Maximum Continuous Junction Temperature . . . . . . . . . . . . +125°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

NOTES:

1.

θ

Brief TB379.

2. For

θ

can be estimated more accurately than the

θ

4. Limits established by characterization and are not production tested.

Electrical Specifications

with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits

established by characterization and are not production tested.

PARAMETER

DESCRIPTION

CONDITION

MIN

TYP

MAX

UNIT

GENERAL

VIN

Backlight Supply Voltage

≤ 9 LEDs per channel

(3.5V/30mA type)

624

V

IVIN_STBY

VIN Shutdown Current

5µA

Output Voltage

34.5

V

Vuvlo

Undervoltage Lockout Threshold

2.45

2.8

V

Vuvlo_hys

Undervoltage Lockout Hysteresis

300

mV

SS

Soft-start

1ms

PWM GENERATOR

EN/PWM

EN/PWM Voltage Range

2.7

5.5

V

ENmin

Minimum Enable Signal

40

µs

tMAX_PWM_OFF

Maximum PWMI Off Time Before

Shutdown

EN/PWMI toggles

28

ms

REGULATOR

VDC

LDO Output Voltage

5.0

5.5

V

IVDC_STBY

Standby Current

EN/PWM = 0V

20

µA

IVDC

Active Current

EN/PWM = 5V

10

mA

VLDO

VDC LDO Dropout Voltage

30

200

mV

BOOST

SWILimit

Boost FET Current Limit

2.3

3.2

A

2.2

A

Internal Boost Switch ON-Resistance

130

260

m

Ω

ISL97636