ISL97675 Просмотр технического описания (PDF) - Renesas Electronics
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ISL97675 Datasheet PDF : 21 Pages
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ISL97675
Electrical Specifications All specifications below are tested at TA = +25°C; VIN = 12V, EN = 3.3V, RISET = 19.6k, unless otherwise noted.
Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
SYMBOL
PARAMETER
CONDITION
MIN
MAX
(Note 8)
TYP
(Note 8) UNIT
BOOST
SWILimit
Boost FET Current Limit
1.5
2.2
2.7
A
rDS(ON)
SS
Internal Boost Switch ON-Resistance
Soft-Start
TA = +25°C
100% LED Duty Cycle
230
300
m
14
ms
Eff_peak
Peak Efficiency
VIN = 12V, 48 LEDs, 20mA
92
%
each, L = 10µH with DCR
101mTA = +25°C
IOUT/VIN
Line Regulation
0.1
%
DMAX
Boost Maximum Duty Cycle
FSW < 0.5 * VDDIO
91
%
FSW > 0.5 * VDDIO
82
%
DMIN
Boost Minimum Duty Cycle
FSW < 0.5 * VDDIO
FSW > 0.5 * VDDIO
8.5
%
16.5
%
FSW
Boost Switching Frequency
FSW <0.5 * VDDIO
FSW >0.5 * VDDIO
475
600
640
kHz
950
1200
1280
kHz
ISW_leakage SW Leakage Current
SW = 45V, EN = 0
10
µA
CURRENT SOURCES
IMATCH
IACC
VHEADROOM
DC Channel-to-Channel Current Matching
RISET = 19.6k,
(IOUT = 20mA)
RISET = 39.2k,
(IOUT = 10mA)
Current Accuracy
RISET = 19.6k,
(IOUT = 20mA)
Dominant Channel Current Source Headroom
at FBx Pin
-1.5
+1.5
%
-1.5
+1.5
%
-1.5
+1.5
%
500
mV
(Note 10)
VHEADROOM_RANGE Dominant Channel Current Sink Headroom ILED = 20mA, TA = +25°C
Range at FBx Pin
90
mV
VISET
ILEDmax
Voltage at ISET Pin
Maximum LED Current per Channel
PWM INTERFACE
1.2
4-Channel, VIN = 4.5V,
VOUT = 40V, FSW = 600kHz
1.22
30
1.24
V
mA
VIL
VIH
FPWMI
Guaranteed Range for PWM Input Low Voltage
Guaranteed Range for PWM Input High Voltage
PWMI Input Frequency Range
0.8
V
1.5
V
100
30,000
Hz
PWMACC
PWMI Input Accuracy
8
bits
PWMHYST
PWMI Input Allowable Jitter Hysteresis
-0.46
+0.46
LSB
PWM GENERATOR
FPWM
PWM Dimming Frequency Range
RFPWM = 1.5M
45
50
55
Hz
RFPWM = 1.5k
33
37
39
kHz
VRFPWM
Voltage at RFPWM pin
1.19
1.22
1.24
V
tDIRECTPWM Direct PWM Minimum On Time
Direct PWM Mode
250
350
ns
FN7630 Rev.2.00
Sep 13, 2017
Page 7 of 21
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