ISL78171 Datasheet, PDF (5/29 Pages) Intersil Corporation – 6-Channel, 50mA Automotive LED Driver with Ultra-high Dimming Ratio and Phase Shift Control

ISL78171
Absolute Maximum Ratings
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V
EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VIN - 0.3V
FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VIN - 8.5V to VIN + 0.3V
VDC, COMP, RSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V
SMBCLK/SCL, SMBDAT/SDA, FPWM, PWM . . . . . . . . . . . . . . -0.3V to 5.5V
OVP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.8V
CH0-CH5, LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 42.5V
PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Above voltage ratings are all with respect to AGND pin
ESD Rating
Human Body Model (Tested per AEC-Q100-002) . . . . . . . . . . . . . . .3.5kV
Machine Model (Tested per AEC-Q100-003) . . . . . . . . . . . . . . . . . . 200V
Charged Device Model (Tested per AEC-Q100-011). . . . . . . . . . . . .1.5kV
Thermal Information
Thermal Resistance (Typical)
_JA (°C/W) _JC (°C/W)
20 Ld QFN Package (Notes 4, 5, 7) . . . . . .
40
2.5
Thermal Characterization (Typical)
_JT (°C/W)
20 Ld QFN Package (Note 6) . . . . . . . . . . . . . . . . . . . . .
1
Maximum Continuous Junction Temperature . . . . . . . . . . . . . . . . .+125°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +105°C
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 26.5V
LX max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40.5V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. _JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
5. For _JC, the “case temp” location is the center of the exposed metal pad on the package underside.
6. _JT is the  junction-to-top thermal characterization parameter. If the package top temperature can be measured with this rating then the die junction
temperature can be estimated more accurately than the _JC and _JA thermal resistance ratings.
7. Refer to JESD51-7 high effective thermal conductivity board layout for proper via and plane designs.
Electrical Specifications V_IN = 12V, EN = 5V, R_SET = 20.1kΩ, unless otherwise noted. Boldface limits apply across the operating
temperature range, -40°C to +105°C.
PARAMETER
DESCRIPTION
TEST CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8)
UNIT
GENERAL
V_IN (Note 9) Backlight Supply Voltage
≤10 LEDs per channel
(type 3.2V (typ)/20mA)
4.5
26.5
V
I_{VIN_STBY}
I_VIN
V_IN Shutdown Current
V_IN Active Current
V_IN = 24V, EN =5V, V_DD = 5V.
SDA, SCL are high
5
µA
5
mA
V_OUT
Output Voltage
V_UVLO
V_{UVLO_HYS}
REGULATOR
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
4.5V < V_IN ≤ 26.5V,
f_SW = 600kHz
8.55V < V_IN ≤ 26.5V,
f_SW = 1.2MHz
40
V
40
V
2.1
2.6
V
200
mV
V_DC
I_{VDC_STBY}
V_LDO
EN_LOW
EN_HI
t_ENLow
BOOST
LDO Output Voltage
Standby Current
VDC LDO Load Regulation
EN Input Low Voltage
EN Input High Voltage
EN Low Time To Shutdown
V_IN ≥ 6V
EN = 0V
V_IN > 5.5V, I_LDO=0 to 20mA
4.55
4.8
5
V
5
µA
20
200
mV
0.5
V
1.8
V
30.5
ms
SW_ILimit
r_DS(ON)
SS
Boost FET Current Limit
Internal Boost Switch ON-resistance
Soft-start
T_A = +25°C
100% LED Duty Cycle
1.5
2.0
2.7
A
235
300
mΩ
7
ms
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5
FN8602.0
June 15, 2015