MAX17061ETI+ Maxim Integrated Products, MAX17061ETI+ Datasheet - Page 19

• Manufacturer Part Number: MAX17061ETI+
• Description: IC LED DRVR WHITE BCKLGT 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX17061ETI+

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 4.5 V ~ 26 V
• Voltage - Output: 5V
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Operating Supply Voltage: 5 V
• Maximum Supply Current: 2 mA
• Maximum Power Dissipation: 1667 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The list of ID values for vendors is shown in Table 3.
The MAX17061 includes a thermal-protection circuit.
When the local IC temperature exceeds +160°C (typ),
the controller and current sources shut down and do
not restart until the die temperature drops by 15°C.
When thermal shutdown occurs, Bit 1 of fault/status
register is set to 1.
Table 3. Vendor IDs
Table 4. Component List
Table 5. Component Suppliers
White LED
Number of WLEDs
Input Voltage
Inductor
Input Capacitors
Output Capacitor
C
Diode Rectifier
Murata
Nichia
Sumida
Toshiba
Vishay
OUT
FREQUENCY
SWITCHING
7–14
15
ID
0
1
2
3
4
5
6
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
Vendor ID register not implemented
Analog Devices
Thermal Shutdown
Micro Semi
SMBus for LCD Panel Applications
VENDOR
Reserved
O2 Micro
Maxim
MPS
ST
TI
1MHz
8-String White LED Driver with
770-436-1300
248-352-6575
847-545-6700
949-455-2000
203-268-6261
PHONE
All MAX17061 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.
At light loads, the MAX17061 automatically skips pulses
to improve efficiency and prevent overcharging the output
capacitor. The output current for the converter SKIP oper-
ation can be calculated by the following equation:
where I
is the input voltage, T
and V
Step-Up Converter Current Calculation
DIODE
O(SKIP)
I
O SKIP
(
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
is the forward voltage of rectifier diode D.
is the output current in SKIP mode, V
)
www.murata.com
www.nichia.com
www.sumida.com
www.toshiba.com/taec
www.vishay.com
2
V
L
IN
ON(MIN)
2
V
OUT
Design Procedure
T
ON MIN
1MHz
is the minimum on-time,
(
WEBSITE
V
DIODE
)
2
f
OSC
V
IN
19
IN