MAX16816 Maxim Integrated Products, MAX16816 Datasheet - Page 19

• Manufacturer Part Number: MAX16816
• Description: Programmable Switch-Mode LED Driver
• Manufacturer: Maxim Integrated Products

Table 1. Programming Mode Entry Codes
Table 2. EEPROM Memory Map
The MAX16816 features a FAULT output multiplexed
with a 1-Wire programming interface. Once the voltage
at UVEN exceeds the UVLO threshold, the device is
enabled and FAULT will pulse low once, indicating the
beginning of the programming window. Two program-
ming mode entry codes must be entered within 8ms
after the pulse to enter programming mode (see Table
1). The MAX16816 will register the second entry code
only after the first code has been received. Once the
MAX16816 successfully enters programming mode, the
data and clock for the 1-Wire interface are supplied
through FAULT.
Once the programming window has passed, the EEPROM
is no longer accessible without cycling power to the
Binning Adjustment (BIN)
REG2 Control (DRPS)
Bl anki ng Ti m e Ad j ustm ent ( BLN K)
Digital Soft-Start Duration (SS)
Internal Oscillator
Enable/Disable (RTOF)
Slope Compensation (ESLP)
PROGRAMMING MODE
PASS_CODE_1
PASS_CODE_2
ENTRY CODE
REGISTER
______________________________________________________________________________________
Programmable Switch-Mode LED Driver
with Analog-Controlled PWM Dimming
FAULT 1-Wire Interface
D7
0
0
ADDRESS
EEPROM
28h–2Bh
38h–3Bh
24h–27h
34h–36h
RANGE
32h–33h
37h
D6
0
0
NO. OF
BITS
4
4
2
1
4
2
D5
1
0
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
D4
0
0
device. Under these conditions, FAULT will go low only
when a fault (overvoltage, overcurrent, or HICCUP mode)
occurs or when the supply voltage drops below the UVLO
threshold.
Nonvolatile EEPROM is available to configure the
MAX16816 through a 1-Wire serial interface. Registers
are located in a linear address space as shown in
Table 2. All other EEPROM locations are reserved.
Configure the six control registers to adjust parameters
including the REG2 voltage, soft-start durations, blank-
ing time, LED load current (binning), slope compensa-
tion, and to enable/disable the RTOF oscillator. See the
1-Wire Interface section for more information about
1-Wire programming.
Adjusts the LED current.
Sets the output voltage for REG2. Connect REG2 to DRI
to supply the high-side voltage for the gate driver, DRV.
Ad j usts the b l anki ng ti m e for d eb ounci ng .
Adjusts the soft-start duration to allow the load current to
ramp up in a controlled manner, minimizing output
overshoot.
Enables/disables the internal oscillator for stand-alone
operation or to synchronize with an external clock.
Adjusts the slope compensation for stability.
D3
1
1
D2
0
0
EEPROM and Programming
DESCRIPTION
D1
0
0
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D0
1
1
CODE
HEX
29h
09h
19