MAX17061AEVKIT+ Maxim Integrated Products, MAX17061AEVKIT+ Datasheet - Page 19

• Manufacturer Part Number: MAX17061AEVKIT+
• Description: Power Management Modules & Development Tools MAX17061A EVAL KIT MAX17061A EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX17061AEVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

All MAX17061A designs should be prototyped and test-
ed prior to production. Table 4 provides a list of power
components for the typical applications circuit. Table 5
lists component suppliers.
External component value choice is primarily dictated
by the output voltage and the maximum load current,
as well as maximum and minimum input voltages.
Begin by selecting an inductor value. Once L is known,
choose the diode and capacitors.
To ensure the stable operation, the MAX17061A
includes slope compensation, which sets the minimum
inductor value. In continuous-conduction mode (CCM),
the minimum inductor value is calculated with the fol-
lowing equation:
Table 4. Component List
Table 5. Component Suppliers
White LED
Number of WLEDs
Input Voltage
Inductor
Input Capacitors
Output Capacitor
C
Diode Rectifier
Murata Electronics North America, Inc.
Nichia Corp.
Sumida Corp.
Toshiba America Electronic Components, Inc.
Vishay
L
OUT
CCM MIN
FREQUENCY
SWITCHING
Step-Up Converter Current Calculation
(
)
V
OUT MAX
SUPPLIER
______________________________________________________________________________________
Nichia NSSW008C
3.2V (typ), 3.5V (max) at 20mA
10 pcs x 4 strings, 25mA (max)
7V to 21V
10µH, 1.2A power inductor
TDK VLP6810T-100M1R2; Sumida CR6D09HPNP-100MC
4.7µF ±10%, 25V X5R ceramic capacitor (1206)
Murata GRM319R61E475KA12D
0.33µF ±10%, 50V X7R ceramic capacitor (1206) (6x)
Murata GRM319R71H334K
TDK C3216JB1H334K
0.7A, 60V Schottky diode (US-flat)
Toshiba CUS04
(
2 24 7
)
Design Procedure
V
.
DIODE
mV f
SMBus for LCD Panel Applications
OSC MIN
2
(
V
IN MIN
1MHz
8-String White LED Driver with
(
)
)
R
S
248-352-6575
770-436-1300
847-545-6700
949-455-2000
203-268-6261
PHONE
where 24.7mV is a scale factor from the slope compen-
sation, the L
stable operation in CCM, and R
equivalent sensing scale factor from the controller’s
internal current-sense circuit.
The controller can also operate in discontinuous con-
duction mode (DCM). In this mode, the inductor value
can be lower, but the peak inductor current is higher
than in CCM. In DCM, the maximum inductor value is
calculated with the following equation:
where the L
for DCM,
and I
LDCM
OUT(MAX)
(
MAX
Nichia NSSW008C
3.2V (typ), 3.5V (max) at 20mA
10 pcs x 8 strings, 25mA (max)
7V to 21V
10µH, 2.5A power inductor
TDK SLF10145T-100M2R5-PF
10µF ±10%, 25V X5R ceramic capacitor (1206)
Murata GRM31CR61E106KA
1µF ±10%, 50V X7R ceramic capacitor (1206) (4x)
Murata GRM31MR71H105KA
TDK C3216X7R1H105K
3A, 60V Schottky diode
Nihon EC31QS06
CCM(MIN)
DCM(MAX)
is the nominal regulator efficiency (85%),
)
is the maximum output current.
2
1
f
OSC MAX
www.murata-northamerica.com
www.nichia.com
www.sumida.com
www.toshiba.com/taec
www.vishay.com
V
OUT MAX
is the minimum inductor value for
(
is the maximum inductor value
(
V
IN MIN
)
V
(
IN MIN
)
V
1MHz
(
OUT MAX
V
WEBSITE
)
S
DIODE
)
=12mΩ (typ) is the
(
2
)
I
OUT MAX
(
)
19