Functional Diagram
Functional Diagrams
TemplateByTechPubs
OFFICIAL VISIO TEMPLATE SPECIFICATIONS
OFFICIAL VISIO TEMPLATE SPECIFICATIONS
maxim integrated TM
maxim
integrated
TM
A Few Helpful Guidelines from Tech Pubs
A Few Helpful
Guidelines from
Tech Pubs
Rectangles in technical drawings should be made with square c...
·
Rectangles
in technical
drawings should be made
with
square
corners, not
rounded
Do not use the bold font except when writing a Maxim part num...
·
Do not use the bold font
except when writing a
Maxim part number or a
major component block
(Maxim part number
should be in
ARIAL
BOLD
in
8 point
)
·
Use the
Component
Library
provided. Please
do not resize components
Please keep your drawing within the area shown to ensure your...
·
Please keep your
drawing within the area
shown to ensure your
drawing fits into the layout
ALL TEXT IN THE TEMPLATE SHOULD BE IN CAPITAL LETTERS All Tex...
ALL TEXT IN THE TEMPLATE SHOULD BE IN CAPITAL LETTERS
All Text
must
use the
ARIAL NARROW
font. The size must be
7 point
. This is the default style
Line weights
should be
0.5
point
which is already set in the components
Subscripts
should be set at
9 point
in combination with the subscript position under FONT
Superscripts
should be set at
9 point
in combination with the superscript position under FONT
IMPORTANT! YOU
MUST
USE THE COMPONENT LIBRARY
Use the provided component library. Figures in the component library have already been drawn
with 0.5 point width. Use the library, prevent rework!
All figures should be set to “no fill,” with no colors or sha...
·
All figures should be set
to
“
no fill
,
”
with
no
colors
or
shading
and no
logos
. Consult Technical
Publications first if you
must use colors or
shading in a drawing.
·
Do not use gradation on
any line.
·
Place drawing near the
center of page. No need
to crop. Leave it on full
page
Save yourself Some time! Under HOME, set the FILL to “NO FILL...
SAVE YOURSELF
SOME TIME!
Under
HOME
, set the
FILL
to
“
NO FILL
”
BEFORE
you begin
working. This will avoid having
to drop the fill out
each time
you draw a component
Figures must be built using the components from the template ...
FIGURES
MUST
BE BUILT USING THE COMPONENTS FROM THE TEMPLATE LIBRARY
Figures created from Visio and dropped into the template
do not qualify
as using the Tech Pubs template
.
FYI: Use of any unofficial Visio template will not be accepted for
any
data sheet submission
Not using this template will delay the production of your data sheet.
OfficialVisioTemplateByTechPubs (REV02A)
OfficialVisioTemplateByTechPubs (
REV02A
)
Enable Input. Connect EN to logic-high for normal operation. When EN is taken low, the device is disabled after a delay of tEN_OFF. Do not leave the EN input open.
EN
EN
V18 UVLO
V18 UVLO
Output of Internal 1.8V Regulator. Connect 1μF and 0.1μF capacitors from V18 to GND with the 0.1μF capacitor placed closest to the pin.
V18
V18
LED Ground. LEDGND is the return path connection for the linear current sinks. Connect GND, LEDGND, and PGND at a single point.
LEDGND
LEDGND
CONTROL LOGIC
CONTROL
LOGIC
POR
POR
DRIVE LOGIC
DRIVE
LOGIC
OUT_
OUT_
4
4
MAX25512
MAX25512
gM
g
M
Boost Voltage Monitoring Input. Connect a resistor-divider from the boost converter output to GND with its midpoint connected to the BSTMON pin in order to set the maximum boost output voltage.
BSTMON
BSTMON
ILIMLV
I
LIMLV
Switching Converter Compensation Input. Connect the compensation network from COMP to GND for current-mode control (see the Feedback Compensation section).
COMP
COMP
Output of Internal 1.8V Regulator. Connect 1μF and 0.1μF capacitors from V18 to GND with the 0.1μF capacitor placed closest to the pin.
V18
V18
Open-Drain Fault Output. FLTB asserts low when a fault is detected. Connect a pull-up resistor from FLTB to a logic supply of 5V or lower.
FLTB
FLTB
EAREF
EAREF
BOOST OSC.
BOOST
OSC
PWM
PWM
Switching Converter Compensation Input. Connect the compensation network from COMP to GND for current-mode control (see the Feedback Compensation section).
COMP
COMP
VBG
VBG
Signal GND. GND is the current return path connection for the low-noise analog signals. Connect GND, LEDGND, and PGND at a single point.
GND
GND
Oscillator Timing Resistor Connection. Connect a timing resistor (RT) to GND to program the switching frequency. Apply an AC-coupled external clock at RT to synchronize the switching frequency with an external clock.
RT
RT
COMPARATOR ARRAY
COMPARATOR
ARRAY
SHORTGND
SHORTGND
4
4
LEDSHORT
LEDSHORT
LEDOPEN
LEDOPEN
LEDUNUSED
LEDUNUSED
4
4
4
4
DAC
DAC
9
9
COMPH
COMPH
COMPL
COMPL
LODIM
LODIM
BOOSTON
BOOSTON
SSDONE
SSDONE
Gate Connection for External Series nMOSFET. Driven by the internal charge pump.
NGATE
NGATE
0.35V
0.35V
UV
UV
Digital PWM Dimming Input. Apply a PWM signal to DIM for LED dimming control. Connect DIM to a logic supply of 5V or lower if dimming control is not used.
DIM
DIM
LED Current-Adjust Input. Connect a resistor (RISET) from ISET to GND to set the current through each LED string (ILED), according to the formula ILED = 1500/RISET. Place the resistor close to the pin to avoid parasitic capacitance.
ISET
ISET
IMON_
IMON_
REFERENCE CURRENT GENERATION
REFERENCE
CURRENT
GENERATION
IREF_
IREF_
BANDGAP
BANDGAP
THERMAL SENSOR
THERMAL
SENSOR
20MHz CLOCK
20MHz
CLOCK
CHARGE PUMP
CHARGE
PUMP
Power Ground. PGND is the DRAIN current return path connection. Connect GND, LEDGND, and PGND at a single point.
PGND
PGND
SSDONE
SSDONE
LINEAR REG.
LINEAR
REG
Input Voltage. Connect to protected battery. Bypass IN with a minimum of 2.2μF in parallel with 0.1μF placed close to the pin.
IN
IN
IREF
IREF
LED Short Detection Threshold-Adjust Input. Connect a resistive divider from V18 to RSDT and GND to program the LED short detection threshold. Connect RSDT directly to V18 to disable LED short detection or when programming the threshold using the I2C interface.
RSDT
RSDT
Drain Connection of Internal Switching Power nMOSFET. Connect to the external inductor and rectifier diode.
DRAIN
DRAIN
CURRENT-SENSE
CURRENT-
SENSE
HIGH-/LOW-VOLTAGE DETECT
HIGH-/LOW-VOLTAGE
DETECT
ILIM
I
LIM
Temperature Sensor Input. To implement LED current reduction at high temperatures connect an NTC temperature sensor to GND with resistors from the NTC to TEMP and to V18. If unused, connect TEMP to V18.
TEMP
TEMP
INTERFACE
INTERFACE
Bidirectional I2C Data Pin. Connect a pull-up resistor from this node to the logic supply voltage.
SDA
SDA
I2C Clock Input Pin. Connect a pull-up resistor from this node to the logic supply voltage.
SCL
SCL
SLOPE COMP
SLOPE
COMP
CCRANK
CCRANK
4x
4x
0.95V
0.95V
OV
OV
VINUV
VINUV
UVLO
UVLO
1.5V
1.5V
Input Voltage. Connect to protected battery. Bypass IN with a minimum of 2.2μF in parallel with 0.1μF placed close to the pin.
IN
IN
LDUMP
LDUMP
LDUMP
LDUMP
4
4
DAC
DAC
8
8
