ISL78171 Datasheet, PDF (3/29 Pages) Intersil Corporation – 6-Channel, 50mA Automotive LED Driver with Ultra-high Dimming Ratio and Phase Shift Control

ISL78171
Block Diagram
V_IN = 4.5V TO 26.5V
L=15uH
SCHOTTKY
DIODE, 60V, 3A
40V, 6 x 50mA*
V_IN
EN
VDC REG
OSC AND
RAMP
COMP
FPWM
LED PWM
CONTROL
FAULT
ISL78171
FAULT/STATUS
REGISTER
=0
LOGIC
IMAX ILIMIT
FET
DRIVER
LX
OVP
OVP
PGND
COMP
RSET
AGND
SMBCLK/SCL
SMBDAT/SDA
PWM
GM
AMP
REFERENCE
GENERATOR
+
-
HIGHEST VF
STRING
DETECT
+
-
SMBUS/I²C
INTERFACE
AND PWM
CONTROL
LOGIC
REGISTERS
PWM BRIGHTNESS CONTROL
DEVICE CONTROL
FAULT/STATUS
IDENTIFICATION
DC BRIGHTNESS CONTROL
CONFIGURATION
PWM/OC/SC
DC
OC, SC
DETECT
OC, SC
DETECT
CH0
CH5
*V_IN > 12V
FAULT/STATUS
REGISTER
TEMP
SENSOR
+
-
FAULT/STATUS
REGISTER
FIGURE 2. ISL78171 BLOCK DIAGRAM
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP RANGE
(°C)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
ISL78171ARZ
8171
-40 to +105
20 Ld 3x4 QFN
L20.3x4
ISL78171ARZ-EVALZ
Evaluation Board
NOTES:
1. Add “-T* suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see product information page for ISL78171. For more information on MSL please see techbrief TB363.
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June 15, 2015