ISL97671AIRZ-T View Datasheet(PDF) - Intersil
Part Name
Description
Manufacturer
ISL97671AIRZ-T Datasheet PDF : 28 Pages
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ISL97671A
Electrical Specifications VIN = 12V, EN = 5V, RSET = 20.1kΩ, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +85°C. (Continued)
PARAMETER
rDS(ON)
SS
DESCRIPTION
Internal Boost Switch ON-resistance
Soft-Start
CONDITION
TA = +25°C
100% LED Duty Cycle
MIN
MAX
(Note 8) TYP (Note 8) UNIT
235
300
mΩ
7
ms
Eff_peak Peak Efficiency
ΔIOUT/ΔVIN
DMAX
Line Regulation
Boost Maximum Duty Cycle
DMIN
Boost Minimum Duty Cycle
fOSC_hi
fOSC_lo
ILX_leakage
REFERENCE
Lx Frequency High
Lx Frequency Low
LX Pin Leakage Current
VIN = 12V, 72 LEDs, 20mA each,
L = 10µH with DCR 101mΩ,
TA = +25°C
VIN = 12V, 60 LEDs, 20mA each,
L = 10µH with DCR 101mΩ,
TA = +25°C
FSW = 1, 600kHz
FSW = 0, 1.2MHz
FSW = 1, 600kHz
FSW = 0, 1.2MHz
FSW = 1, 600kHz
FSW = 0, 1.2MHz
LX = 45V, EN = 0V
92.9
%
90.8
%
0.1
%
90
%
81
9.5
%
17
475
600
640
kHz
0.97
1.14
1.31
MHz
10
µA
FAULT DETECTION
VSC
Short Circuit Threshold Accuracy
Temp_shtdwn Temperature Shutdown Threshold
7.5
8.2
V
150
°C
Temp_Hyst Temperature Shutdown Hysteresis
23
°C
VOVPlo
Overvoltage Limit on OVP Pin
CURRENT SOURCES
1.19
1.25
V
IMATCH
DC Channel-to-Channel Current Matching
RSET = 20.1kΩ, Reg0x00 = 0xFF,
(IOUT = 20mA)
±0.7
±1.0
%
IACC
Current Accuracy
-1.5
+1.5
%
VHEADROOM
Dominant Channel Current Source Headroom ILED = 20mA
at CH Pin
TA = +25°C
500
mV
VRSET
Voltage at RSET Pin
RSET = 20.1kΩ
1.2
1.22
1.24
V
ILED(max)
Maximum LED Current per Channel
VIN = 12V, VOUT = 45V, Fsw = 1.2MHz,
50
mA
TA = +25°C
PWM GENERATOR
VIL
VIH
FPWMI
PWMACC
tDIRECTPWM
FPWM
FAULT PIN
Guaranteed Range for PWM Input Low Voltage
Guaranteed Range for PWM Input High Voltage
PWM Input Frequency Range
PWM Dimming Accuracy (Except Direct PWM
Dimming)
Direct PWM Minimum On Time
Direct PWM Mode
PWM Dimming Frequency Range
0.8
V
1.5
VDD
V
200
30,000
Hz
8
bits
250
350
ns
100
30,000
Hz
IFAULT
VFAULT
Fault Pull-down Current
Fault Clamp Voltage with Respect to VIN
VIN = 12V
VIN = 12, VIN - VFAULT
12
21
30
µA
6
7
8.3
V
6
FN7709.1
March 24, 2011
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