ISL97673IRZ-TK Intersil, ISL97673IRZ-TK Datasheet - Page 17

• Manufacturer Part Number: ISL97673IRZ-TK
• Description: IC LED DVR PWM CTRL 6CH 20QFN
• Manufacturer: Intersil

Specifications of ISL97673IRZ-TK

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: RGB, White LED
• Frequency: 600kHz, 1.2MHz
• Voltage - Supply: 4.5 V ~ 26.5 V
• Voltage - Output: *
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 40mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CASE
10
11
6
7
8
9
V
V
V
V
IH
IH
IL
IL
CH0 LED Open
Circuit but has
paralleled Zener
CH0 LED Open
Circuit but has
paralleled Zener
Channel-to-
Channel
ΔVF too high
Channel-to-
Channel ΔVF too
high
Output LED stack
voltage too high
V
to GND at start-up
or V
operation
NOTES:
SMBus/I
FAILURE MODE
OUT
SMBCLK
SMBDAT
P
S = start condition
P = stop condition
A = acknowledge
A = not acknowledge
R/W = read enable at high; write enable at low
OUT
/LX shorted
t
BUF
shorted in
2
C Description
S
t
HD:STA
Upper OTP triggered
but CH0 < 4V
Upper OTP not
triggered but CHx >
4V
Lower OTP triggered
but CHx < 4V
Upper OTP triggered
but CHx < 4V
V
LX current and timing
are monitored.
OVP pins monitored
for excursions below
20% of OVP threshold.
17
t
LOW
DETECTION MODE
OUT
> VOVP
t
TABLE 2. PROTECTIONS TABLE (Continued)
R
FIGURE 25. SMBus/I
t
HD:DAT
All channels go off until chip
cooled and then comes back
on with current reduced to
76%. Subsequent OTP
triggers will reduce I
further
CH0 remains ON and has
highest VF, thus V
increases.
Any channel at below the target current will fault out after
6 PWM cycles.
Remaining channels driven with normal current.
All channels go off until chip cooled and then comes back
on with current reduced to 76%. Subsequent OTP triggers
will reduce I
Any channel that is below the target current will time-out
after 6 PWM cycles, and V
regulation voltage required for other channels.
The chip is permanently shutdown 31mS after power-up if
V
FAILED CHANNEL ACTION
OUT
/Lx is shorted to GND.
t
ISL97673
HIGH
t
F
OUT
t
SU:DAT
2
further
C INTERFACE
OUT
OUT
S
t
OUT
SU:STA
will return to the normal
Same as CH0
V
switches OFF after 6 PWM
cycles. This is an unwanted
shut off and can be
prevented by setting OVP at
an appropriate level.
OUT
GOOD CHANNELS
increases, then CH-X
ACTION
t
SU:STO
VF of CH0
VF of CH0
Highest VF of
CH0 through
CH5
Highest VF of
CH0 through
CH5
Highest VF of
CH0 through
CH5
REGULATED
P
June 24, 2010
V
BY
OUT
FN7633.0