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ISL97671
Ordering Information
PART NUMBER PART
(Notes 1, 2, 3) MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
Pin Configuration
ISL97671
(20 LD QFN)
TOP VIEW
ISL97671IRZ
7671
20 Ld 4x3 QFN
L20.3x4
ISL97671IRZ-EVAL
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.
FAULT
VIN
EN
VDC
PWM
1
2
3
4
5
20
19
18
17
16 OVP
15 CH5
14 CH4
13 CH3
12 CH2
3. For Moisture Sensitivity Level (MSL), please see device information
SMBDAT/SDA*
6
11
CH1
page for ISL97671 . For more information on MSL please see
techbrief TB363 .
7
8
9
10
Pin Descriptions (I = Input, O = Output, S = Supply)
PIN NAME
FAULT
VIN
EN
VDC
PWM
SMBDAT/SDA*
PIN #
1
2
3
4
5
6
TYPE
O
S
I
S
I
I/O
DESCRIPTION
Fault disconnect switch.
Input voltage for the device and LED power.
The device needs 4ms for initial power-up enable. It will be disabled if it is not biased for longer than 28ms.
De-couple capacitor for internally generated supply rail.
PWM brightness control pin or DPST control input.
SMBus/I 2 C serial data input and output. When pins 6 and 7 are grounded or in logic 0’s for longer than 60ms, the
drivers will be controlled by external PWM signal.
SMBCLK/SCL*
7
I
SMBus/I 2 C serial clock input. When pins 6 and 7 are grounded or in logic 0’s for longer than 60ms, the drivers will
be controlled by external PWM signal.
FPWM
8
I
Set PWM dimming frequency, FPWM by connecting a resistor. See the “PWM Dimming Frequency Adjustment”
section for resistor calculation.
AGND
CH0
CH1
CH2
CH3
CH4
CH5
OVP
RSET
COMP
PGND
LX
9
10
11
12
13
14
15
16
17
18
19
20
S
I
I
I
I
I
I
I
I
O
S
O
3
Analog Ground for precision circuits.
Input 0 to current source, FB, and monitoring.
Input 1 to current source, FB, and monitoring.
Input 2 to current source, FB, and monitoring.
Input 3 to current source, FB, and monitoring.
Input 4 to current source, FB, and monitoring.
Input 5 to current source, FB, and monitoring.
Overvoltage protection input.
Resistor connection for setting LED current, (see Equation 2 for calculating the I LED(peak) ).
Boost compensation pin.
Power ground
Input to boost switch.
FN7631.3
August 14, 2012
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