MAX16816ATJ+T Maxim Integrated Products, MAX16816ATJ+T Datasheet - Page 20

• Manufacturer Part Number: MAX16816ATJ+T
• Description: IC LED DRIVR HIGH BRIGHT 32-TQFN
• Manufacturer: Maxim Integrated Products
• Type: HBLED Driverr

Specifications of MAX16816ATJ+T

• Topology: PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 125kHz ~ 500kHz
• Voltage - Supply: 5.5 V ~ 76 V
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 125°C
• Internal Switch(s): Yes
• Efficiency: 90%
• Low Level Output Current: 76 mA
• High Level Output Current: 67 mA
• Operating Supply Voltage: 5.5 V to 76 V
• Maximum Supply Current: 4.5 mA
• Maximum Power Dissipation: 2758 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Current - Output / Channel: -
• Lead Free Status / Rohs Status: Details

The MAX16816 uses a feedback loop to control the
load current. The differential voltage across the current-
sense resistor, R
adjustable reference to regulate the LED current. The
voltage across the sense resistor is measured differen-
tially to achieve high immunity to common-mode noise.
The MAX16816 includes a factory-set regulation volt-
age of 133mV ±3% across R
regulation voltage by programming the binning adjust-
ment register (see Table 3). The reference voltage level
may not necessarily be equal to the regulation voltage.
There are offsets involved that are trimmed at the facto-
ry. Read the default register code and step up the code
by one to increase the regulation voltage by 6.66mV.
Step down the code by one to reduce the regulation
voltage by 6.66mV.
REG2 is EEPROM configurable to supply a voltage rang-
ing from 5V to 15V and is capable of sourcing up to
20mA. Connect REG2 to the primary switching MOSFET
gate-driver supply input, DRI, for normal operation.
Table 3. Binning Adjustment Register
Programmable Switch-Mode LED Driver
with Analog-Controlled PWM Dimming
* Not recommended
20
VOLTAGE LEVEL
REFERENCE
______________________________________________________________________________________
173.33*
180.00*
186.67*
193.33*
200.00*
100.00
106.67
113.33
120.00
126.67
133.33
140.00
146.67
153.33
160.00
166.67
(mV)
Binning Adjustment Register (BIN)
CS
, is compared with an internal
REG2 Control Register (DRPS)
27h
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
EEPROM ADDRESS
CS
. Adjust the differential
26h
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
25h
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
24h
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Adjust REG2 by programming the REG2 Control
Register. See Table 4.
The MAX16816 features a programmable blanking time
to mask out the current-sense signal for a short dura-
tion to avoid the ILIM and HICCUP comparators from
prematurely terminating the on-cycle of the switching
MOSFET. This blanking time allows for higher input cur-
rent during startup without triggering a fault condition.
The blanking time is adjustable in the range of 150ns to
75ns by configuring the EEPROM. See Table 5.
Table 4. REG2 Control Register
Table 5. Blanking Time
* Factory default
* Factory default
BLANKING TIME
REG2 OUTPUT
VOLTAGE
10.333
11.000
11.667
12.333
13.000
13.667
14.333
15.000
7.000*
5.000
5.667
6.333
7.667
8.333
9.000
9.667
150*
(ns)
125
100
Blanking Time Adjustment Register (BLNK)
(V)
75
2Bh
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
33h
0
0
1
1
EEPROM ADDRESS
EEPROM ADDRESS
2Ah
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
29h
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
32h
0
1
0
1
28h
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1