MAX17061A Maxim Integrated Products, MAX17061A Datasheet - Page 18

• Manufacturer Part Number: MAX17061A
• Description: 8-String White LED Driver
• Manufacturer: Maxim Integrated Products

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8-String White LED Driver with
SMBus for LCD Panel Applications
The list of ID values for vendors is shown in Table 3.
The MAX17061A includes a thermal-protection circuit.
When the local IC temperature exceeds +160°C (typ),
the controller and current sources shut down and do
not restart until the die temperature drops by 15°C.
When thermal shutdown occurs, Bit 0 and Bit 1 of
fault/status register is set to 1.
Fault/Status Register: Address is 0x02. This register has 6 status bits that allow monitoring the backlight con-
troller’s operating state. Bit 6 and Bit 7 are reserved bits, and Bit 3 is the status indicator or backlight. The other 5
bits are fault indicators. Bit 0 is a logical OR of all fault codes including LED open/short to simplify error detection.
All the bits in this register are read only. The reserved bits return a zero when read.
Bit field definitions:
Identification Register: Address is 0x03. The ID register contains two bit fields to denote the manufacturer and the
silicon revision of the controller IC. The bit field widths were chosen to allow up to 32 vendors with up to eight silicon
revisions each. This register is read only. The value for the MAX17061A is 0x81.
Bit field definitions:
18
LED PANEL
RESERVED
BIT FIELD
BIT FIELD
Bit 7 = 1
Bit [6..3]
Bit [2..0]
REGISTER 0x02
Bit 7 (R)
______________________________________________________________________________________
REGISTER 0x03
Bit 7
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED
DEFINITION
THRM_SHD Thermal shutdown (1 = thermal fault, 0 = thermal OK)
DEFINITION
OV_CURR
LED panel
2_CH_SD
1_CH_SD
MFG[3..0]
BL_STAT
REV[2..0]
Bit 6 (R)
Bit 6 (R)
FAULT
MFG3
Two or more LED output channels are faulted (1 = faulted, 0 = OK)
At least one LED output channel is faulted (1 = faulted, 0 = OK)
Backlight status (1 = BL on, 0 = BL off)
Input overcurrent (1 = overcurrent condition, 0 = current OK)
Any fault, logic OR of all fault conditions (1 = fault condition, 0 = no fault)
2_CH_SD
Display panel using LED backlight, bit 7 = 1
Manufacturer ID; see Table 3, default = 0
Silicon rev (revs 0–7 allowed for silicon spins), default = 1
Bit 5 (R)
Thermal Shutdown
Bit 5 (R)
MFG2
FAULT STATUS REGISTER
ID REGISTER
1_CH_SD
Bit 4 (R)
Bit 4 (R)
MFG1
BL_STAT
Bit 3 (R)
Table 3. Vendor IDs
Bit 3 (R)
MFG0
DESCRIPTION
DESCRIPTION
7–14
15
ID
0
1
2
3
4
5
6
OV_CURR
Bit 2 (R)
Bit 2 (R)
REV2
DEFAULT VALUE 0x81
Vendor ID register not implemented
DEFAULT VALUE 0x00
THRM_SHDN
Bit 1 (R)
Bit 1 (R)
Analog Devices
REV1
Micro Semi
VENDOR
Reserved
O2 Micro
Maxim
MPS
ST
TI
Bit 0 (R)
FAULT
Bit 0 (R)
REV0