isl97635a Intersil Corporation, isl97635a Datasheet - Page 3

• Manufacturer Part Number: isl97635a
• Description: Smbus 6-channel Led Driver
• Manufacturer: Intersil Corporation

Block Diagram
SMBCLK
SMBDAT
PWMO
PWMI
VBL+ = 6V TO 24V
COMP
RSET
f
GND
VDC
PWM
CONTROL
LED PWM
OSC AND
REG
RAMP
COMP
VIN
VIN
INTERFACE
INTERFACE
SMBUS
3
+
+
-
-
AMP
GM
PWM BRIGHTNESS CONTROL
DC BRIGHTNESS CONTROL
REFERENCE
GENERATOR
Σ
IMAX
DEVICE CONTROL
FAULT
CONFIGURATION
FAULT/STATUS
IDENTIFICATION
= 0
FAULT/STATUS
REGISTERS
REGISTER
FIGURE 1. ISL97635A BLOCK DIAGRAM
ILIMIT
HIGHEST VF
LOGIC
DETECT
STRING
ISL97635A
PWM/OC/SC
AM
+
+
-
-
ISL97635A
DRIVER
FET
+
+
-
-
FAULT/STATUS
DETECT
OC, SC
REGISTER
DETECT
OC, SC
LX
LX
OVP
IIN0
IIN5
FAULT/STATUS
SENSOR
REGISTER
TEMP
(6 x 9 = 54 WHITE LEDS)
34.5V, 30mA PER STRING
PGND
December 22, 2008
FN6564.2