MAX16828EVKIT+ Maxim Integrated Products, MAX16828EVKIT+ Datasheet - Page 7

• Manufacturer Part Number: MAX16828EVKIT+
• Description: EVALUATION KIT FOR MAX16828
• Manufacturer: Maxim Integrated Products

Specifications of MAX16828EVKIT+

• Current - Output / Channel: 200mA
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable, Extra 5V Output
• Voltage - Input: 6.5 ~ 40V
• Utilized Ic / Part: MAX16828
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX16815/MAX16828 include a fixed +5V output
regulator that delivers up to 4mA of load current
throughout the 6.5V to 40V input voltage range.
Connect a 0.1µF compensation capacitor from V5 to
ground. Shorting V5 to ground disables the thermal
shutdown. V5 stays on during PWM dimming.
The MAX16815/MAX16828 enter a thermal-shutdown
mode in the event of overheating. This typically occurs
in overload or output short-circuit conditions. If the
junction temperature exceeds T
internal thermal-protection circuitry turns off the series
pass device. The MAX16815/MAX16828 recover from
thermal-shutdown mode once the junction temperature
drops by 24°C (typ). The devices therefore protect
themselves by thermal cycling in the event of a short-
circuit or overload condition. Shorting V5 to ground dis-
ables the thermal shutdown.
High-Brightness LED Drivers with PWM Dimming
High-Voltage, 100mA/200mA Adjustable Linear
_______________________________________________________________________________________
Detailed Description
EN
V5
GND
Thermal Protection
J
= +159°C (typ), the
+5V Regulator
SHUTDOWN
THERMAL
MAX16815
MAX16828
REGULATOR
BANDGAP
AND 5V
1.2V
DIM
The MAX16815/MAX16828 use a sense resistor across
CS+ and GND for the TDFN package or across CS+
and CS- for the SO package, to set the LED current.
The LED current is given by I
For proper operation, the minimum input voltage must
always be:
where V
connected LEDs. The minimum operating voltage of the
device is +6.5V. The device operates below +6.5V;
however, output current may not meet the full regulation
specification (see the Typical Operating Characteristics )
and the V5 regulator will drop below 5V.
Provide a pulse to the dimming input (DIM) of the
MAX16815/MAX16828 to produce a PWM output.
Alternatively, connect DIM to IN and pulse IN.
V
IN(MIN)
FT(MAX)
IREG
≥ V
DIFF
AMP
RSNS(MAX)
Applications Information
is the total forward voltage of all series
Low-Frequency PWM Dimming
Programming the LED Current
SO Functional Diagram
Input-Voltage Considerations
0.8µA
IN
+ V
P
LED
FT(MAX)
= V
OUT
CS+
CS-
RSNS
+ ∆V
at the Output
/R
DO
SENSE
(MAX)
.
7