isl97635 Intersil Corporation, isl97635 Datasheet - Page 6

• Manufacturer Part Number: isl97635
• Description: Smbus 8-channel Led Driver
• Manufacturer: Intersil Corporation

Electrical Specifications
t
t
t
t
t
t
GENERAL TIMING SPECIFICATIONS (Note 4)
t
t
t
t
t
t
t
t
t
t
t
CURRENT SOURCES
V
V
ILEDmax
PWM GENERATOR
FPWM
DPWM
tMAX_PWM_OFF
HD:DAT
SU:DAT
LOW
HIGH
F
R
1
2
3
4
5
6
7
8
9
10
11
headroom
RSET
PARAMETER
Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
Clock/data Fall Time
Clock/data Rise Time
Minimum Setup Time Between V
with EN = 1 and SMBus Communications
Minimum Setup Time Between EN Going High with V
above VUVLO and SMBus Communications
Minimum Time Between V
EN = 1 to SMBus BL CTRL On
Minimum Time Between EN Going High with V
VUVLO to SMBus BL CTRL On
Minimum Time for LED Output to Respond to SMBus Data at
any Levels
Response Time Between Backlight CTRL Off with Boost
Not Switching to Backlight CTRL On with Boost Switching
Response Time Between Backlight CTRL On with Boost
Switching to Backlight CTRL Off with Boost Not Switching
LED Channel Short Circuit Fault Detection to Status
Register Data Ready
V
Status Register Data Ready
Time Between VIN Rising Above VUVLO with EN = 1 and
V
Time Between EN Going High with V
a V
Dominant Channel Current Source Headroom at IIN Pin
Voltage at RSET Pin
Maximum LED Current per Channel
Generated PWM Frequency
Duty Cycle Of Generated PWM (DC-to-PWM)
Maximum PWMI Off Time Before Shutdown
OUT-GND
OUT-GND
OUT-GND
Short Circuit Detection During Operation to
Short being Reported in Status Register
6
Short being Reported in Status Register
All specifications below are tested at T
unless otherwise noted. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
specified. Temperature limits established by characterization and are not production tested. (Continued)
DESCRIPTION
IN
Rising above VUVLO with
IN
Rising above VUVLO
IN
Above VUVLO and
ISL97635
IN
above
A
IN
= -40°C to +85°C; V
EN = 1, T
capacitor < 10µF
V
VDC capacitor < 10µF
EN = 1, T
V
V
T
V
T
V
T
V
T
V
T
EN = 1, VDC capacitor < 10µF,
T
V
10µF, T
used.
I
R
R
C
C
V
CFPWM = 27nF
V
CFPWM = 27nF
EN/PWMI toggles
LED
A
A
A
A
A
A
IN
IN
IN
IN
IN
IN
IN
IN
PWMO
PWMO
SET
SET
FPWM
PWMO
= +25°C
= +25°C
= +25°C
= +25°C, LEDs Active
= +25°C, Fault FET used
= +25°C, Fault FET used.
> VUVLO, VDC capacitor <
> VUVLO, T
> VUVLO, T
> VUVLO, EN = 1,
> VUVLO, EN = 1,
> VUVLO, EN = 1,
> VUVLO, EN = 1,
> VUVLO, EN = 1,
= 20mA, T
= 36.6kΩ
= 20.9kΩ
A
= 27nF
= 0.3V
= 1.1V
= 220nF
= +25°C, Fault FET
CONDITION
A
A
= +25°C, VDC
= +25°C
IN
A
A
A
= 12V, EN = 5V, R
= +25°C
= +25°C,
= +25°C
MIN
300
250
680
4.7
4.0
SET
= 36.6kΩ,
TYP
100
700
200
4.5
4.5
80
80
30
30
35
90
10
28
5
5
5
6
5
December 22, 2008
MAX
1000
300
720
50
FN6434.2
UNIT
mV
mV
mA
ms
ms
ms
ms
ms
ms
Hz
ns
ns
µs
µs
ns
ns
µs
µs
µs
µs
µs
µs
%
%