isl97673 Intersil Corporation, isl97673 Datasheet - Page 2

• Manufacturer Part Number: isl97673
• Description: 6-channel Smbus Or Pwm Dimming Led Driver With Phase Shift Control
• Manufacturer: Intersil Corporation

Block Diagram
SMBCLK(SCL)
SMBDAT(SDA)
EN/PWM
VDC
FPWM
GND
SEL1
SEL2
VIN = 4.5V~26V
RSET
COMP
SMBus/
Control
Controller
Dimming
I2C
REG
REG
OSC &
RAMP
Comp
Dimming Mode
Control Ckt
Ext PWM
VIN
VIN
Selection
REF_OVP
+
-
Bias
2
Phase Shift
fsw
Controller
REF_VSC
REF
GEN
AMP
GM
FAULT
FIGURE 2. ISL97673 BLOCK DIAGRAM
Σ
ISL97673
VSET
=0
Imax
Fault/Status
Fault/Status
Register
Register
Controls
ILIMIT
PWM0
DAC0
ISL97673
10uH/3A
String Detect
DAC0
Highest VF
Controls
PWM1
DAC1
Logic
Fault/Status Control
Controls
PWM5
D AC5
PWM0
+
-
DAC1
O/P Short
PWM1
Drivers
FET
Boost SW
DAC5
+
-
PWM5
Open Ckt, Short Ckt
0
+
-
LX
Detects
OVP
p e
Fault/Status
Sensor
1
Temp
Register
4.7uF/50V
5
CH0
CH1
CH5
OVP
PGND
45V*, 25mA per string
78 (6x13) LEDs
*V
* Vin > 6V
40mA
IN
> 12V
June 24, 2010
FN7633.0