MAX16833EVKIT+ Maxim Integrated Products, MAX16833EVKIT+ Datasheet

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MAX16833EVKIT+

Manufacturer Part Number
MAX16833EVKIT+
Description
KIT EVAL FOR MAX16833 LED DRIVER
Manufacturer
Maxim Integrated Products
Datasheets
1.MAX16833AUET.pdf (22 pages)
2.MAX16833EVKIT.pdf (8 pages)

Specifications of MAX16833EVKIT+

Current - Output / Channel
1A
Outputs And Type
1, Non-Isolated
Voltage - Output
3 ~ 36 V
Features
Analog Brightness control
Voltage - Input
5 ~ 18 V
Utilized Ic / Part
MAX16833A/B
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-5187; Rev 2; 12/10
The MAX16833/MAX16833B/MAX16833C/MAX16833D
are peak current-mode-controlled LED drivers for boost,
buck-boost, SEPIC, flyback, and high-side buck topolo-
gies. A dimming driver designed to drive an external
p-channel in series with the LED string provides wide-
range dimming control. This feature provides extremely
fast PWM current switching to the LEDs with no transient
overvoltage or undervoltage conditions. In addition to
PWM dimming, the ICs
DC input at ICTRL. The ICs sense the LED current at the
high side of the LED string.
A single resistor from RT/SYNC to ground sets the
switching frequency from 100kHz to 1MHz, while an
external clock signal capacitively coupled to RT/SYNC
allows the ICs to synchronize to an external clock. In
the MAX16833/MAX1833C, the switching frequency
can be dithered for spread-spectrum applications. The
MAX16833B/MAX16833D instead provide a 1.64V refer-
ence voltage with a 2% tolerance.
The ICs operate over a wide 5V to 65V supply range
and include a 3A sink/source gate driver for driving
a power MOSFET in high-power LED driver applica-
tions. Additional features include a fault-indicator output
(FLT) for short or overtemperature conditions and an
overvoltage-protection sense input (OVP) for overvoltage
protection. High-side current sensing combined with a
p-channel dimming MOSFET allow the positive terminal
of the LED string to be shorted to the positive input termi-
nal or to the negative input terminal without any damage.
This is a unique feature of the ICs.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
/V denotes an automotive qualified part.
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.
Ordering Information continued at end of data sheet.
MAX16833AUE+
MAX16833AUE+/v+
Automotive Exterior Lighting:
Commercial, Industrial, and Architectural
Lighting
PART
High-Beam/Low-Beam/Signal/Position Lights
Daytime Running Lights (DRLs)
Fog Light and Adaptive Front Light Assemblies
_______________________________________________________________ Maxim Integrated Products 1
-40°C to +125°C
-40°C to +125°C
General Description
provide
TEMP RANGE
Integrated High-Side Current Sense
analog dimming using a
High-Voltage HB LED Drivers with
Applications
PIN-PACKAGE
16 TSSOP-EP*
16 TSSOP-EP*
S Boost, SEPIC, and Buck-Boost Single-Channel
S +5V to +65V Wide Input Voltage Range with a
S Integrated High-Side Current-Sense Amplifier
S ICTRL Pin for Analog Dimming
S Integrated High-Side pMOS Dimming MOSFET
S Programmable Operating Frequency (100kHz to
S Frequency Dithering for Spread-Spectrum
S 2% Accurate 1.64V Reference (MAX16833B)
S Full-Scale, High-Side, Current-Sense Voltage of
S Short-Circuit, Overvoltage, and Thermal
S Fault Indicator Output
S -40NC to +125NC Operating Temperature Range
S Thermally Enhanced 5mm x 4.4mm, 16-Pin TSSOP
WITH LOAD
6V TO 18V
DUMP UP
LED Drivers
Maximum 65V Boost Output
Driver (Allows Single-Wire Connection to LEDs)
1MHz) with Synchronization Capability
Applications (MAX16833)
200mV
Protection
Package with Exposed Pad
TO 70V
PWMDIM
Frequency Dithering
Frequency Dithering
FUNCTIONALITY
Simplified Operating Circuit
IN
PWMDIM
MAX16833
PGND
ISENSE+
DIMOUT
ISENSE-
NDRV
OVP
Ordering Information
CS
MAX DUTY CYCLE (%)
Features
88.5
88.5
LED+
LED-

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MAX16833EVKIT+ Summary of contents

Page 1

... Exposed pad. /V denotes an automotive qualified part. Ordering Information continued at end of data sheet. _______________________________________________________________ Maxim Integrated Products 1 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. S Boost, SEPIC, and Buck-Boost Single-Channel ...

Page 2

High-Voltage HB LED Drivers with Integrated High-Side Current Sense ABSOLUTE MAXIMUM RATINGS IN to PGND ........................................................... -0.3V to +70V ISENSE+, ISENSE-, DIMOUT to PGND ................ -0.3V to +80V DIMOUT to ISENSE+ ...............................................-9V to +0.3V ISENSE- to ISENSE+ ............................................-0.6V to +0.3V ...

Page 3

High-Voltage HB LED Drivers with Integrated High-Side Current Sense ELECTRICAL CHARACTERISTICS (continued 12V 12.4kI VCC 0V, V OVP CS PGND SGND noted. ...

Page 4

High-Voltage HB LED Drivers with Integrated High-Side Current Sense ELECTRICAL CHARACTERISTICS (continued 12V 12.4kI VCC 0V, V OVP CS PGND SGND noted. ...

Page 5

High-Voltage HB LED Drivers with Integrated High-Side Current Sense ELECTRICAL CHARACTERISTICS (continued 12V 12.4kI VCC 0V, V OVP CS PGND SGND noted. ...

Page 6

High-Voltage HB LED Drivers with Integrated High-Side Current Sense (V = +12V 1FF VIN VCC LFRAMP DIMOUT RISE TIME vs. TEMPERATURE 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 -40 - TEMPERATURE ...

Page 7

High-Voltage HB LED Drivers with Integrated High-Side Current Sense (V = +12V 1FF VIN VCC LFRAMP NDRV RISE/FALL TIME vs. TEMPERATURE 60 50 NDRV FALL TIME 40 NDRV RISE TIME 30 20 -40 -15 ...

Page 8

High-Voltage HB LED Drivers with Integrated High-Side Current Sense PIN NAME LFRAMP Low-Frequency Ramp Output. Connect a capacitor from LFRAMP to ground to program the ramp (MAX16833/ frequency, or connect to SGND if not used. A resistor can be connected ...

Page 9

High-Voltage HB LED Drivers with Integrated High-Side Current Sense UVLO 5V REG 5V UVLO RT/ RT OSCILLATOR SYNC SLOPE COMPENSATION CS/PWM CS BLANKING RAMP GENERATION 0.42V LFRAMP V BG MIN ICTRL LPF OUT ISENSE+ 6.15 ISENSE- 3.3V ...

Page 10

High-Voltage HB LED Drivers with Integrated High-Side Current Sense UVLO 5V REG UVLO RT/ RT OSCILLATOR SYNC SLOPE COMPENSATION CS/PWM CS BLANKING 1.64V (80µA) REFERENCE 0.42V REF V BG MIN ICTRL LPF OUT ISENSE+ 6.15 ISENSE- 3.3V ...

Page 11

High-Voltage HB LED Drivers with Integrated High-Side Current Sense Detailed Description The MAX16833/MAX16833B/MAX16833C/MAX16833D are peak current-mode-controlled LED drivers for boost, buck-boost, SEPIC, flyback, and high-side buck topolo- gies. A low-side gate driver capable of sinking and sourcing 3A can drive ...

Page 12

High-Voltage HB LED Drivers with Integrated High-Side Current Sense Analog Dimming (ICTRL) The ICs offer an analog dimming control input (ICTRL). The voltage at ICTRL sets the LED current level when V < 1.2V. The LED current can be linearly ...

Page 13

High-Voltage HB LED Drivers with Integrated High-Side Current Sense C1 C2 680pF 1000pF SYNC D2 R2 SD103AWS 22I GND Figure 1. SYNC Circuit Figure 1 shows the frequency-synchronization circuit suitable for applications where a 5V amplitude pulse with 20% to ...

Page 14

High-Voltage HB LED Drivers with Integrated High-Side Current Sense Thermal Protection The ICs feature thermal protection. When the junction temperature exceeds +160NC, the ICs turn off the external power MOSFETs by pulling the NDRV low and DIMOUT high. External MOSFETs ...

Page 15

High-Voltage HB LED Drivers with Integrated High-Side Current Sense Inductor Selection In the boost converter (see the Typical Operating Circuits), the average inductor current varies with the line voltage. The maximum average current occurs at the lowest line voltage. For ...

Page 16

High-Voltage HB LED Drivers with Integrated High-Side Current Sense Slope Compensation Slope compensation should be added to converters with peak current-mode control operating in continuous- conduction mode with more than 50% duty cycle to avoid current-loop instability and subharmonic oscilla- ...

Page 17

High-Voltage HB LED Drivers with Integrated High-Side Current Sense where amperes farads, f LED OUT hertz, and volts. The remaining 50% of OUTRIPPLE allowable ripple is for the ESR of the ...

Page 18

High-Voltage HB LED Drivers with Integrated High-Side Current Sense 2  × × LED   2    × +     ON OFF ...

Page 19

High-Voltage HB LED Drivers with Integrated High-Side Current Sense and C4 is chosen to set the integrator zero ZRHP frequency to maintain loop stability. For optimum per- formance, choose the components using the following equations: × × ...

Page 20

High-Voltage HB LED Drivers with Integrated High-Side Current Sense 18V WITH LOAD DUMP UP TO 70V C1 PWMDIM 18V WITH LOAD DUMP UP TO 70V C1 PWMDIM ...

Page 21

High-Voltage HB LED Drivers with Integrated High-Side Current Sense PART TEMP RANGE MAX16833BAUE+ -40°C to +125°C MAX16833BAUE/V+ -40°C to +125°C MAX16833CAUE+ -40°C to +125°C MAX16833CAUE/V+ -40°C to +125°C MAX16833DAUE+ -40°C to +125°C MAX16833DAUE/V+ -40°C to +125°C +Denotes a lead(Pb)-free/RoHS-compliant package. ...

Page 22

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 22 2010 Maxim Integrated Products © ...

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