isl97635a Intersil Corporation, isl97635a Datasheet - Page 6

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

Electrical Specifications
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
I
PWM GENERATOR (Note 4)
FPWM
DPWM
t
SU:DAT
LOW
HIGH
F
R
1
2
3
4
5
6
7
8
9
10
11
LEDmax
MAX_PWM_OFF
headroom
RSET
PARAMETER
Data Setup Time
Clock Low Period
Clock High Period
Clock/Data Fall Time
Clock/Data Rise Time
Minimum Setup Time Between V
VUVLO with EN = 1 and SMBus Communications
Minimum Setup Time Between EN Going High with
V
Minimum Time Between V
with EN = 1 to SMBus BL CTRL On
Minimum Time Between EN Going High with V
above 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
to Status Register Data Ready
Time Between VIN Rising Above VUVLO with
EN = 1 and V
Status Register
Time Between EN Going High with V
VUVLO and a V
Status Register
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
IN
OUT-GND
above VUVLO and SMBus Communications
Short Circuit Detection During Operation
6
All specifications below are tested at T
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)
OUT-GND
OUT-GND
DESCRIPTION
Short being Reported in
Short being Reported in
IN
Rising above VUVLO
IN
Rising above
IN
Above
ISL97635A
IN
A
= -40°C to +85°C; V
EN = 1, T
V
VDC capacitor < 10µF
EN = 1, T
V
V
V
V
V
Active
V
FET used
EN = 1, VDC capacitor < 10µF, T
Fault FET used.
V
T
I
R
R
C
V
V
EN/PWMI toggles
LED
A
IN
IN
IN
IN
IN
IN
IN
IN
PWMO
PWMO
SET
SET
FPWM
= +25°C, Fault FET used.
> VUVLO, T
> VUVLO, T
> VUVLO, EN = 1, T
> VUVLO, EN = 1, T
> VUVLO, EN = 1, T
> VUVLO, EN = 1, T
> VUVLO, EN = 1, T
> VUVLO, VDC capacitor < 10µF,
= 20mA, T
= 36.6kΩ
= 20.9kΩ
= 27nF, C
= 0.3V CFPWM = 27nF
= 1.1V CFPWM = 27nF
A
A
= +25°C, VDC capacitor < 10µF
= +25°C
CONDITION
A
A
A
= +25°C
= +25°C,
PWMO
= +25°C
IN
= 12V, EN = 5V, R
= 220nF
A
A
A
A
A
= +25°C
= +25°C
= +25°C
= +25°C, LEDs
= +25°C, Fault
A
= +25°C,
SET
MIN TYP MAX UNIT
250
680
= 36.6kΩ, unless
4.7
4.0
100
700
200
4.5
4.5
80
80
30
30
35
90
10
28
5
5
5
6
5
December 22, 2008
1000
300
720
50
FN6564.2
mV
mV
mA
ms
ms
ms
ms
ms
Hz
ms
ns
µs
µs
ns
ns
µs
µs
µs
µs
µs
µs
%
%