ISL97671 Intersil, ISL97671 Datasheet - Page 2

• Manufacturer Part Number: ISL97671
• Description: 6-Channel SMBus/I2C or PM Dimming LED Driver
• Manufacturer: Intersil

Block Diagram
FIGURE 2. ISL97671 TYPICAL APPLICATION DIAGRAM WITH EXTERNAL PWM SIGNAL CONTROL
SMBDAT/SDA
SMBCLK/SCL
EN
PWM
V
IN
= 4.5V TO 26.5V
V
COMP
AGND
RSET
IN
f
VDC
PWM
= 4.5~26.5V
2
LED PWM
CONTROL
OSC AND
REG
COMP
RAMP
VIN
VIN
SMBUS/I
INTERFACE
AND PWM
CONTROl
LOGIC
+
+
-
-
2
AMP
C
GM
PWM BRIGHTNESS CONTROL
DC BRIGHTNESS CONTROL
FIGURE 3. ISL97671 BLOCK DIAGRAM
GENERATOR
DEVICE CONTROL
Σ = 0
REFERENCE
IDENTIFICATION
CONFIGURATION
IMAX ILIMIT
FAULT/STATUS
FAULT
FAULT/STATUS
REGISTERS
17
1
2
4
7
6
5
3
8
9
REGISTER
FAULT
VIN
VDC
SMBCLK/SCL
SMBDAT/SDA
PWM
EN
RSET
FPWM
AGND
ISL97671
ISL97671
HIGHEST VF
LOGIC
STRING
DETECT
PWM/OC/SC
COMP
DC
PGND 19
OVP
CH0
CH1
CH2
CH3
CH4
CH5
+
+
-
-
LX 20
ISL97671
16
10
11
12
13
14
15
18
DRIVER
FET
V
+
+
OUT
-
-
FAULT/STATUS
DETECT
OC, SC
REGISTER
= 45V*, 40mA PER STRING
DETECT
OC, SC
LX
LX
OVP
CH0
CH5
FAULT/STATUS
REGISTER
SENSOR
TEMP
*V
IN
(6 x 13 = 78 EDs)
45V*, 40mA PER STRING
> 12V
*V
PGND
IN
> 12V
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June 24, 2010
FN7631.0