ISL97671IRZ-T Intersil, ISL97671IRZ-T Datasheet - Page 22

• Manufacturer Part Number: ISL97671IRZ-T
• Description: IC LED DVR PWM CTRL 6CH 20QFN
• Manufacturer: Intersil

Specifications of ISL97671IRZ-T

• 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
• 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
• Voltage - Output: -

Fault/Status Register (0x02)
This register has 6 status bits that allow monitoring of
the backlight controller’s operating state. Bit 0 is a logical
“OR” of all fault codes to simplify error detection. Not all
of the bits in this register are fault related (Bit 3 is a
simple BL status indicator). The remaining bits are
reserved and return a “0” when read and ignore the bit
value when written. All of the bits in this register are
read-only, with the exception of bit 0, which can be
cleared by writing to it.
• A Read Byte cycle to Register 0x02 indicates the
• A Read Byte cycles to Register 0x2 also returns
• 1_CH_SD returns a 1 if one or more channels have
• 2_CH_SD returns a 1 if two or more channels have
• A fault will not be reported in the event that the BL is
RESERVED RESERVED 2_CH_SD 1_CH_SD BL_STAT OV_CURR THRM_SHDN
current BL on/off status in BL_STAT (1 if the BL is on,
0 if the BL is off).
FAULT as the logical OR of THRM_SHDN, OV_CURR,
2_CH_SD, and 1_CH_SD should these events occur.
faulted out.
faulted out.
commanded on and then immediately off by the
system.
REGISTER 0x02
Bit 7 (R)
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BIT
Bit 6 (R)
FAULT/STATUS REGISTER
22
Bit 5 (R)
BIT ASSIGNMENT
FIGURE 32. DESCRIPTIONS OF FAULT/STATUS REGISTER
THRM_SHDN
OV_CURR
2_CH_SD
1_CH_SD
BL_STAT
FAULT
Bit 4 (R)
Bit 3 (R)
= Two LED output channels are shutdown (1 = shutdown, 0 = OK)
= One LED output channel is shutdown (1 = shutdown, 0 = OK)
= BL Status (1 = BL On, 0 = BL Off)
= Input Overcurrent (1 = Overcurrent condition, 0 = Current OK)
= Thermal Shutdown (1 = Thermal Fault, 0 = Thermal OK)
= Fault occurred (Logic “OR” of all of the fault conditions)
ISL97671
Bit 2 (R)
• When FAULT is set to 1, it will remain at 1 even if the
• The default value for Register 0x02 is 0x00.
Identification Register (0x03)
The ID register contains 3 bit fields to denote the LED
driver (always set to 1), manufacturer and the silicon
revision of the controller IC. The bit field widths allow up
to 16 vendors with up to 8 silicon revisions each. In order
to keep the number of silicon revisions low, the revision
field will not be updated unless the part will make it out
to the user’s factory. Thus, if during the engineering
development process, 3 silicon spins were needed, the
next available revision ID would be used for all 3 spins
until that same ID made it to the factory. Except Bit 7,
which has to be 1, all of the bits in this register are read-
only.
• Vendor ID 9 represents Intersil Corporation.
• The default value for Register 0x03 is 0xC8.
The initial value of REV shall be 0. Subsequent values of
REV will increment by 1.
signal which sets it goes away. FAULT will be cleared
when the BL_CTL bit of the Device Control Register is
toggled or when written low. At that time, if the fault
condition is still present or reoccurs, FAULT will be
set to 1 again. BL_STAT will not cause FAULT to be
set
.
BIT FIELD DEFINITIONS
Bit 1 (R)
Bit 0 (R)
FAULT
June 24, 2010
FN7631.0