ISL97673IRZ-TK Intersil, ISL97673IRZ-TK Datasheet - Page 16

• 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
1
2
3
4
5
CH0 Short Circuit
CH0 Short Circuit
CH0 Short Circuit
CH0 Open Circuit
with infinite
resistance
CH0 LED Open
Circuit but has
paralleled Zener
FAILURE MODE
REG
VSET/2
VIN
IMAX
DRIVER
Upper
Over-Temperature
Protection limit (OTP)
not triggered and CH0
< 4V
Upper OTP triggered
but VCH0 < 4V
Upper OTP not
triggered but CH0 >
4V
Upper OTP not
triggered and CH0 <
4V
Upper OTP not
triggered and CH0 <
4V
16
DETECTION MODE
ILIMIT
REGISTER
STATUS
FAULT/
FAULT
FIGURE 24. SIMPLIFIED FAULT PROTECTIONS
LOGIC
CONTROL
TABLE 2. PROTECTIONS TABLE
SMB/I
LOGIC
DRIVER
SHORT
CH0 ON and burns power.
All channels go off until chip
cooled and then comes back
on with current reduced to
76%. Subsequent OTP
triggers will reduce I
further.
CH1 disabled after 6 PWM
cycle time-out.
V
will time-out after 6 PWM
cycles and switch off. V
will drop to normal level.
CH1 remains ON and has
highest VF, thus V
increases.
O/P
FET
2
THRM
THRM
SHDN
SHDN
FAILED CHANNEL ACTION
C
OTP
OTP
OUT
PWM/OC0/SC0
will ramp to OVP. CH1
ISL97673
VSET
LX
VSC
VSC
DC CURRENT
+
-
OVP
OUT
T2
T1
OUT
SENSOR
REF
TEMP
OUT
VOUT
Q0
Same as CH0
CH1 through CH5 Normal
CH1 through CH5 Normal
CH1 through CH5 ON, Q1
through Q5 burn power
PWM/OC5/SC5
CH1 through CH5 Normal
CH0
VSET
GOOD CHANNELS
+
-
ACTION
Q5
CH5
Highest VF of
CH1 through
CH5
Highest VF of
CH1 through
CH5
Highest VF of
CH1 through
CH5
Highest VF of
CH1 through
CH5
VF of CH0
REGULATED
June 24, 2010
V
BY
OUT
FN7633.0