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MAX16828ATT+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX16815/MAX16828 current regulators operate
from a 6.5V to 40V input voltage range and deliver up
to 100mA (MAX16815) or 200mA (MAX16828) to high-
brightness LED (HB LED) loads. The output current is
adjusted by using an external current-sense resistor in
series with the LEDs. The MAX16815/MAX16828’s dim-
ming input allows wide-range “pulsed” PWM operation.
An on-board pass element minimizes external compo-
nents while providing ±3.5% output-current accuracy.
The MAX16815/MAX16828 are available in a thermally
enhanced, 3mm x 3mm, 6-pin TDFN package with
exposed pad and in an 8-pin SO package with
exposed pad; they are specified over the automotive
-40°C to +125°C temperature range.
Applications
Automotive Interior: Map, Courtesy,
and Cluster Lighting
Automotive Exterior: Rear Combination Lights
(RCLs)
Emergency Vehicle Warning Lights
Signage and Indicators
Ambient and Architectural Lighting
LED Bulbs
Display Backlighting
Features
o 6.5V to 40V Operating Range
o Adjustable LED Current
MAX16815: 35mA to 100mA
MAX16828: 35mA to 200mA
o ±3.5% LED Current Accuracy
o High-Voltage DIM Input for Dimming Interface
o Integrated Pass Element with Low-Dropout
Voltage (0.4V typ)
o 5V Regulated Output with 4mA Source Capability
o Thermal Shutdown
o Output Short-Circuit Protection
o Available in Small, Thermally Enhanced,
3mm x 3mm, 6-Pin TDFN and 8-Pin SO with
Exposed Pad Packages
o -40°C to +125°C Operating Temperature Range
MAX16815/MAX16828
High-Voltage, 100mA/200mA Adjustable Linear
High-Brightness LED Drivers with PWM Dimming
________________________________________________________________
Maxim Integrated Products
1
Simplified Diagram
Ordering Information
MAX16815
MAX16828
IN
OUT
V5
LEDs
R
SENSE
0.1µF
6.5V TO 40V
+5V REG
CS+
0.1µF
GND
DIM
PWM
DIMMING
CS-
MAX16815
MAX16828
IN
OUT
V5
LEDs
R
SENSE
C1
+6.5V TO +40V
+5V REG
CS+
C2
CS-
DIM
PWM DIMMING
GND
EN
19-4032; Rev 1; 7/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX16815ATT+ -40°C to +125°C 6 TDFN-EP*
MAX16815ASA+ -40°C to +125°C 8 SO-EP*
MAX16828ATT+ -40°C to +125°C 6 TDFN-EP*
MAX16828ASA+ -40°C to +125°C 8 SO-EP*
Typical Operating Circuit
Pin Configurations appear at end of data sheet.
MAX16815/MAX16828
High-Voltage, 100mA/200mA Adjustable Linear
High-Brightness LED Drivers with PWM Dimming
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, V
EN
= 12V (SO only), C
V5
= 0.1µF to GND, I
V5
= 0, V
DIM
= 4V, V
CS-
= 0V (SO only), connect R
SENSE
= 2Ω (MAX16815)
and R
SENSE
= 1Ω (MAX16828) between CS+ and GND. T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN to GND ...............................................................-0.3V to +45V
CS+, CS-, V5 to GND ...............................................-0.3V to +6V
DIM, EN to GND...........................................-0.3V to (V
IN
+ 0.3V)
OUT Short Circuited to GND Duration
(at V
IN
= +16V) .......................................................60 minutes
Maximum Current into Any Pin (except IN and OUT).......±20mA
Continuous Power Dissipation (T
A
= +70°C)
6-Pin, 3mm x 3mm TDFN
(derate 18.2mW/°C above +70°C)..........................1454.5mW
8-Pin SO (derate 23.3mW/°C above +70°C)...........1860.5mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
6-Pin, 3mm x 3mm TDFN ...............................................9°C/W
8-Pin SO .........................................................................7°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
6-Pin, 3mm x 3mm TDFN .............................................42°C/W
8-Pin SO .......................................................................43°C/W
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
IN
(Note 3) 6.5 40.0 V
I
LOAD
= 100mA 0.82 2
Ground Current I
G
I
LOAD
= 200mA 1 2
mA
Shutdown Supply Current I
SHDN
V
EN
≤ 0.6V (SO only) 35 70 µA
R
SENSE
= 2_ (MAX16815) 100
Guaranteed Output Current I
OUT
R
SENSE
= 1_ (MAX16828) 200
mA
35mA < I
OUT
< 100mA (MAX16815) ±3.5
Output Current Accuracy
35mA < I
OUT
< 200mA (MAX16828) ±3.5
%
I
OUT
= 100mA (current pulsed),
12V < V
IN
< 40V (MAX16815) (Note 4)
0.1 0.4
I
OUT
= 100mA (current pulsed),
6.5V < V
IN
< 12V (MAX16815) (Note 4)
0.1 0.6
I
OUT
= 200mA (current pulsed),
12V < V
IN
< 40V (MAX16828) (Note 5)
0.27 0.55
Dropout Voltage ∆VDO
I
OUT
= 200mA (current pulsed),
6.5V < V
IN
< 12V (MAX16828) (Note 5)
0.27 0.7
V
Current rising 9.7
Output Current Slew Rate
Current falling 9.7
mA/µs
V
OUT
= 0V, V
IN
= 12V, MAX16815 130 200 270
Short-Circuit Current
V
OUT
= 0V, V
IN
= 12V, MAX16828 250 300 350
mA
EN INPUT (SO ONLY)
EN Input Current
I
EN
-2.5 -1 -0.2 µA
EN Input Voltage High
V
IH
2.8 V
EN Input Voltage Low
V
IL
0.6 V
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
MAX16815/MAX16828
High-Voltage, 100mA/200mA Adjustable Linear
High-Brightness LED Drivers with PWM Dimming
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, V
EN
= 12V (SO only), C
V5
= 0.1µF to GND, I
V5
= 0, V
DIM
= 4V, V
CS-
= 0V (SO only), connect R
SENSE
= 2Ω (MAX16815)
and R
SENSE
= 1Ω (MAX16828) between CS+ and GND. T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT SENSE
Regulated R
SENSE
Voltage V
RSNS
V
RSNS
= V
CS+
for TDFN package;
V
RSNS
= V
CS+
- V
CS-
for SO package
193 200 207 mV
CS- Voltage Range SO only -0.3 +4.7 V
Input Current (CS+)
V
CS+
= 220mV
2.7 7 µA
Input Current (CS-)
V
CS+
= 220mV (SO only)
-50 17.2 µA
DIM Input Current V
DIM
= 0V -2.5 -1.0 -0.2 µA
DIM Input-Voltage High V
IH
2.8 V
DIM Input-Voltage Low V
IL
0.6 V
Turn-On Time t
ON
After V
DIM
rising to 4V (Note 7) 100 µs
Turn-Off Time t
OFF
After V
DIM
falling to 0.6V (Note 7) 55 µs
THERMAL OVERLOAD
Thermal-Shutdown Temperature +159 °C
Thermal-Shutdown Hysteresis 24 °C
+5V REGULATOR
Output-Voltage Load Regulation V
V5
(Note 8) 4.8 5.0 5.2 V
Output Voltage ∆V
V5
0 < I
V5
< 4mA 12 20 mV/mA
V5 Short-Circuit Current V
V5
= 0 (Note 9) 15 mA
Note 2: All devices are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design.
Note 3: Resistors were added from OUT to CS+ to aid with power dissipation.
Note 4: Dropout is measured as follows:
Connect R
O
from OUT to CS+. Connect R
SENSE
= 2Ω (MAX16815) from CS+ to GND (for TDFN) or from CS+ to CS- (for
SO). Set V
IN
= 12V (record V
OUT1
= V
OUT
). For V
IN
= 40V, use R
O
= 360Ω; for V
IN
= 6.5V, use R
O
= 56Ω.
Reduce V
IN
until V
OUT
= 0.97 x V
OUT1
(record as V
IN2
and V
OUT2
). ∆V
DO
= V
IN2
- V
OUT2
.
Note 5: Dropout is measured as follows:
Connect R
O
from OUT to CS+. Connect R
SENSE
= 1Ω (MAX16828) from CS+ to GND (for TDFN) or from CS+ to CS- (for
SO). Set V
IN
= 12V (record V
OUT1
= V
OUT
). For V
IN
= 40V, use R
O
= 180Ω; for V
IN
= 6.5V, use R
O
= 27Ω.
Reduce V
IN
until V
OUT
= 0.97 x V
OUT1
(record as V
IN2
and V
OUT2
). ∆V
DO
= V
IN2
- V
OUT2
.
Note 6: I
V5
= 0mA.
Note 7: t
ON
time includes the delay and the rise time needed for I
OUT
to reach 90% of its final value. t
OFF
time is the time needed for
I
OUT
to drop below 10%. See the
Typical Operating Characteristics
. t
ON
and t
OFF
are tested with 100Ω (MAX16815) or 51Ω
(MAX16828) from OUT to CS+.
Note 8: Current regulation varies with V5 load (see the
Typical Operating Characteristics
).
Note 9: Thermal shutdown does not function if V5 is shorted to ground.
P1-P3P4-P6P7-P9P10-P11

MAX16828ATT+T

Mfr. #:
Buy MAX16828ATT+T
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers 100/200mA Adj Lnear HB w/PWM Dimming
Lifecycle:
New from this manufacturer.
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