ISL976787IBZ Просмотр технического описания (PDF) - Renesas Electronics
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ISL976787IBZ
Renesas Electronics
ISL976787IBZ Datasheet PDF : 24 Pages
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ISL97687
Electrical Specifications All specifications below are characterized at TA = -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
MAX
(Note 10) TYP (Note 10) UNIT
DMAX
DMIN
fSW
Boost Maximum Duty Cycle
Boost Minimum Duty Cycle
Boost Switching Frequency (See Equation 4)
EFFPEAK
REFERENCE
Boost Peak Efficiency
fSW = 600kHz
fSW = 1.2MHz
ROSC = 250kΩ
ROSC = 83kΩ
ROSC = 42kΩ
92
%
26
%
180
200
220 kHz
540
600
660 kHz
1.08
1.2
1.32 MHz
90
%
IMATCH
Channel-to-Channel Current Matching
IACC
Absolute Current
FAULT DETECTION
Channels are in a single IC,
-2
±1
2
%
ILED: 100mA
RISET1/2 = 28.7kΩ
-3
3
%
VSC
Channel Short Circuit Threshold
VTEMP
Over-Temperature Threshold
VTEMP_ACC
Over-Temperature Threshold Accuracy
VOVP_OUT
Overvoltage Limit on OVP Pin
VOVP_IN
Overvoltage Limit on VIN Pin
DIGITAL I/O LOGIC LEVEL SPECIFICATIONS
7.2
1.18
8
150
5
1.22
35
8.8
V
°C
°C
1.24
V
V
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
VHEADROOM_RANGE Dominant Channel Current Sink Headroom Range at CHx ILED = 20mA,
Pin
TA = +25°C
VISET1,2
Voltage at ISET1 and 2 Pins
ILED_MAX
Maximum LED Current per Channel
PWM GENERATOR
0.75
V
(Note 12)
90
mV
1.18
160
1.21
1.24
V
mA
fPWM
Generated PWM Frequency (See Equation 3)
Dimming Range
fPWMI
VPWM_SET
VACTL
PWM Dimming Duty Cycle Limits
PWMI Input Frequency Range
PWM_SET Voltage
Analog Dimming Input
RPWM_SET = 333kΩ
RPWM_SET = 3.3kΩ
fPWM ≤ 20kHz
RPWM_SET = 3.3kΩ
0% Dimming
100% Dimming
45
4.5
0.1
60
1.18
0.28
2.95
50
5
1.21
0.3
3
55
Hz
5.5 kHz
100
%
20k Hz
1.25
V
0.31
V
3.1
V
tPWM_MIN
Minimum PWM On Time in Direct PWM Mode
350
ns
NOTES:
10. 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.
11. At maximum VIN of 32V, minimum VOUT is 35V. Minimum VOUT can be lower at lower VIN.
12. Varies within the range specified by VHEADROOM_RANGE.
FN7714 Rev.3.00
Sep 13, 2017
Page 7 of 24
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