ISL97682 Ver la hoja de datos (PDF) - Intersil
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ISL97682 Datasheet PDF : 17 Pages
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ISL97682, ISL97683, ISL97684
Electrical Specifications All specifications below are characterized at TA = -40°C to +85°C; VIN = 12V, EN = 5V, RSET = 20kΩ,
unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
DESCRIPTION
CONDITION
MIN
MAX
(Note 7)
TYP
(Note 7) UNIT
DMIN
FSW
ILX_leakage
Boost Minimum Duty Cycle
Boost Switching Frequency
LX Leakage Current
VFSW < 2.4V (FSW = 600kHz)
8
%
VFSW > 2.4V
(FSW = 1.0MHz)
15
%
FSW < 2.4V
500
600
650
kHz
FSW > 2.4V
0.9
1.0
1.1
MHz
LX = 45V, EN = 0
10
µA
REFERENCE
IMATCH
Channel-to-Channel DC Current Matching
RSET = 20kΩ (ILED = 20mA for
-2
ISL97683/4 and 40mA for
ISL97682)
+2
%
RSET = 40kΩ (ILED = 10mA for
-2.5
ISL97683/4 and 20mA for
ISL97682)
+2.5
%
IACC
Current Accuracy
FAULT DETECTION
ILED = 20mA (ISL97683/4)
-2
ILED = 40mA (ISL97682)
+2
%
VSC
Channel Short Circuit Threshold
Vtemp
Over-Temperature Threshold
Vtemp_acc
Over-Temperature Threshold Accuracy
VOVPlo
Overvoltage Limit on OVP Pin
OVPfault
OVP Short Detection Fault Level
CURRENT SOURCES
3.8
1.18
4.4
150
5
1.22
70
4.9
V
°C
°C
1.24
V
mV
VHEADROOM
Dominant Channel Current Source Headroom ILED = 20mA
at CH Pin
500
mV
VRSET
ILED(max)
Voltage at RSET Pin
Maximum LED Current per Channel
ISL97682
ISL97683
1.2
1.22
1.24
V
100
mA
50
mA
ISL97684
50
mA
PWM GENERATOR
VIL
VIH
FPWMI
DPWMACC
Guaranteed Range for PWM Input Low Voltage
Guaranteed Range for PWM Input High Voltage
PWMI Input Frequency Range
Direct PWM Dimming Output Maximum
Resolution
0.8
V
1.5
V
100
30,000 Hz
85
ns
tDPWM_ON_MIN
PWMACC
Direct PWM Dimming Minimum On-Time
PWM Dimming with Adjustable Dimming
Frequency Output Resolution
Direct PWM Mode
250
450
ns
8
bit
PWMHYST
PWMI Input Allowable Jitter Hysteresis
-0.46
+0.46 LSB
FPWM
Generated PWM Dimming Frequency Range
100
30,000 Hz
VFPWM
Voltage at FPWM pin
RFPWM = 3.3kΩ
1.20
1.22
1.24
V
NOTES:
7. Parameters 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.
8. At maximum VIN of 26V, minimum VOUT is 28V. Minimum VOUT can be lower at lower VIN.
6
FN7689.0
March 11, 2011
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