ISL97672B

5

FN7995.1

November 22, 2013

REGULATOR

VDC

LDO Output Voltage

4.55

4.8

5

V

IVDC_STBY

Standby Current

EN = 0V

5

µA

VLDO

VDC LDO Droop Voltage

20

200

mV

Guaranteed Range for EN Input Low Voltage

0.5

V

Guaranteed Range for EN Input High Voltage

1.8

V

EN Low Time Before Shut-down

30

us

BOOST

Boost FET Current Limit

1.5

2.0

2.7

A

Internal Boost Switch ON-Resistance

235

300

mΩ

SS

Boost Soft-start Time

100% LED Duty Cycle

7

ms

Eff_peak

Peak Efficiency

each, L = 10µH with DCR

101mΩ

92.9

%

each, L = 10µH with DCR

101mΩ

90.8

%

Line Regulation

0.1

%

Boost Maximum Duty Cycle

90

%

81

%

Boost Minimum Duty Cycle

9.5

%

17

%

Minimum Switching Frequency

175

200

235

kHz

Maximum Switching Frequency

1.312

1.50

1.69

MHz

LX Leakage Current

LX = 45V, EN = 0

10

µA

CURRENT SOURCES

Channel-to-Channel Current Matching

±0.7

±1.0

%

Current Accuracy

-1.5

+1.5

%

Dominant Channel Current Source Headroom

500

(Note 9)

mV

Dominant Channel Current Source Headroom

560

(Note 9)

710

860

(Note 9)

mV

Voltage at RSET Pin

1.2

1.22

1.24

V

Maximum LED Current per Channel

50

mA

FAULT DETECTION

VSC

Channel Short Circuit Threshold

PWM Dimming = 100%

7.5

8.2

V

Temp_shtdwn

Over- Temperature Shutdown Threshold

150

°C

Temp_Hyst

Over- Temperature Shutdown Hysteresis

23

°C

VOVPlo

Overvoltage Limit on OVP Pin

1.199

1.24

V

limits apply over the operating junction temperature range, -40°C to +85°C.

PARAMETER

DESCRIPTION

CONDITION

MIN

(Note 8)

TYP

MAX

(Note 8)

UNIT