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ISL97687IRTZ-HEVALZ Datasheet(PDF) 7 Page - Intersil Corporation

Part # ISL97687IRTZ-HEVALZ
Description  4-Channel LED Driver with Phase Shift Control and 10-Bit Dimming Resolution
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL97687IRTZ-HEVALZ Datasheet(HTML) 7 Page - Intersil Corporation

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ISL97687
7
FN7714.1
September 27, 2012
DMAX
Boost Maximum Duty Cycle
fSW = 600kHz
92
%
DMIN
Boost Minimum Duty Cycle
fSW = 1.2MHz
26
%
fSW
Boost Switching Frequency (See Equation 4)
ROSC = 250kΩ
180
200
220
kHz
ROSC = 83kΩ
540
600
660
kHz
ROSC = 42kΩ
1.08
1.2
1.32
MHz
EFFPEAK
Boost Peak Efficiency
90
%
REFERENCE
IMATCH
Channel-to-Channel Current Matching
Channels are in a single IC,
ILED: 100mA
-2
±1
2
%
IACC
Absolute Current
RISET1/2 = 28.7kΩ
-3
3
%
FAULT DETECTION
VSC
Channel Short Circuit Threshold
7.2
8
8.8
V
VTEMP
Over-Temperature Threshold
150
°C
VTEMP_ACC
Over-Temperature Threshold Accuracy
5
°C
VOVP_OUT
Overvoltage Limit on OVP Pin
1.18
1.22
1.24
V
VOVP_IN
Overvoltage Limit on VIN Pin
35
V
DIGITAL I/O LOGIC LEVEL SPECIFICATIONS
VIL
Logic Input Low Voltage - STV, EN_PS, EN_VSYNC,
EN_ADIM, PWMI, CSEL, EN
0.8
V
VIH
Logic Input High Voltage - STV, EN_PS, EN_VSYNC,
EN_ADIM, PWMI, CSEL, EN
1.5
5.5
V
STV
Frame frequency
30
240
Hz
CURRENT SOURCES
VHEADROOM
Dominant Channel Current Source Headroom at CH Pin ILED = 160mA
TA = +25°C
0.75
V
VISET1,2
Voltage at ISET1 and 2 Pins
1.18
1.21
1.24
V
ILED_MAX
Maximum LED Current per Channel
160
mA
PWM GENERATOR
fPWM
Generated PWM Frequency (See Equation 3)
RPWM_SET = 333kΩ
45
50
55
Hz
RPWM_SET = 3.3kΩ
4.5
5
5.5
kHz
Dimming Range
PWM Dimming Duty Cycle Limits
fPWM ≤ 20kHz
0.1
100
%
fPWMI
PWMI Input Frequency Range
60
20k
Hz
VPWM_SET
PWM_SET Voltage
RPWM_SET = 3.3kΩ
1.18
1.21
1.25
V
VACTL
Analog Dimming Input
0% Dimming
0.28
0.3
0.31
V
100% Dimming
2.95
3
3.1
V
tPWM_MIN
Minimum PWM On Time in Direct PWM Mode
350
ns
NOTES:
9. 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.
10. At maximum VIN of 32V, minimum VOUT is 35V. Minimum VOUT can be lower at lower VIN.
Electrical Specifications All specifications below are characterized at T
A = -40°C to +105°C; VIN = 12V, EN = 5V. Boldface limits apply
over the operating temperature range, -40°C to +105°C. (Continued)
PARAMETER
DESCRIPTION
CONDITION
MIN
(Note 9)
TYP
MAX
(Note 9)
UNIT


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