MAX16806EVKIT+ Maxim Integrated Products, MAX16806EVKIT+ Datasheet - Page 16

• Manufacturer Part Number: MAX16806EVKIT+
• Description: EVAL KIT FOR MAX16806
• Manufacturer: Maxim Integrated Products

Specifications of MAX16806EVKIT+

• Current - Output / Channel: 350mA
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable, Extra 5V Output
• Voltage - Input: 5.5 ~ 40V
• Utilized Ic / Part: MAX16806
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
Thermal Foldback Clamp Level is a 3-bit register that
sets the minimum percentage of the LED current. Only
the first 3 bits of the data byte program the Thermal
Foldback Clamp Level register. The remaining 5 bits
are ignored. See
value is 40%.
The MAX16805/MAX16806 use the EEPROM Content
Transfer register to transfer data from the EEPROM to
the dynamic registers. A write command issued to this
register transfers data from the EEPROM to the dynam-
ic registers. Data bytes written to the EEPROM Content
Transfer register do not have any significance. At
power-up, the EEPROM content is automatically loaded
into the dynamic registers.
The EEPROM Program Enable register enables the
EEPROM for programming. Write to the EEPROM
Programming Enable register to initiate the EEPROM
programming cycle. Data written to the register does
not have any significance, however, it must be issued
following a write command [(0xFF), (0xCA)] to the
Password register.
Table 8. Thermal Foldback Clamp Level
16
THERMAL FOLDBACK
EEPROM Content Transfer Register (0x06)
EEPROM Program Enable Register (0x08)
CLAMP LEVEL (%)
Thermal Foldback Clamp Level Register
______________________________________________________________________________________
100
91
83
74
66
57
49
40
Table
BIT 2
8. The factory-default register
0
0
0
0
1
1
1
1
BIT 1
(0x05), MAX16806
0
0
1
1
0
0
1
1
BIT 0
0
1
0
1
0
1
0
1
(0x00)
(0x01)
(0x02)
(0x03)
(0x04)
(0x05)
(0x06)
(0x07)
HEX
The MAX16805/MAX16806 use a sense resistor across
CS+ and CS- to set the LED current. The differential
sense amplifier connected across R
ground-loop immunity and low-frequency noise rejec-
tion. The LED current is given by the equation below:
V
using I
Set V
ming. The MAX16805/MAX16806 use dynamic regis-
ters to program the EEPROM. Once the desired
dynamic registers have been updated with a setting,
write the data byte (0xCA) to the Password register
(0xFF). The data byte (0xCA) enables the EEPROM
programming mode. Any other data byte except the
(0xCA) disables the EEPROM programming mode. To
transfer data from dynamic registers to the EEPROM,
write to EEPROM Program Enable register (0x08).
For proper operation, the minimum input voltage must
always be:
where V
connected LEDs and ΔV
output voltage.
SENSE
IN
V
2
IN(MIN)
C.
FT(MAX)
to 22V before initiating the EEPROM program-
is programmable from 103mV to 198mV
> V
Applications Information
I
LED
is the total forward voltage of all series
SENSE
= V
Programming the LED Current
SENSE
Input Voltage Considerations
+ V
DO(MAX)
FT(MAX)
Programming EEPROM
/ R
SENSE
is the maximum drop
+ ΔV
SENSE
DO(MAX)
provides