MAX1986ETE+T Maxim Integrated Products, MAX1986ETE+T Datasheet - Page 9

• Manufacturer Part Number: MAX1986ETE+T
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX1986ETE+T

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.2MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details

Figure 1. Standard Application Circuit of the MAX1984
MAX1984 MAX1985 MAX1986
16
17
18
19
20
0.22µF
BRIGHTNESS
CONTROL
C3
LED SELECT
2.7V TO 5.5V
V
V
IN
PIN
IN
2 x 2.2µF
16
17
18
19
20
14
13
16
15
17
19
20
8
REF
SETI
BITA
BITB
BITC
MODE
SEL
LDG
C1
_______________________________________________________________________________________
GND
3
10µH
MAX1984
L1
12
13
14
15
16
2
LX
18
IN
OUT
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
NAME
MODE
BITA
BITC
SEL
IN
1
4
5
6
7
9
10
11
12
C2
0.1µF
D1
D2
D3
D4
D5
D6
D7
D8
Brightness Control Input (Multimode):
Brightness Control Input:
Input Supply. IN provides power to the internal control circuitry and MOSFET
drivers. Bypass IN to GND with a minimum 0.1µF ceramic capacitor.
Brightness Control Mode Selection Input. Connect MODE and BITC to IN for
DPWM control. Connect MODE, BITA, and BITC to IN for analog control. For 2-bit
parallel control, connect MODE to IN and BITC to ground. For 3-bit parallel control,
connect MODE to GND.
LED Selection Input. Connect SEL to IN to turn on all LEDs. Connect SEL to ground
to turn on only LED1–LED5 (MAX1984), LED1–LED4 (MAX1985), or LED1 to LED3
(MAX1986). Leave SEL unconnected or force to V
(MAX1984), LED3–LED6 (MAX1985), or LED4 (MAX1986).
C4
2 x 2.2µF
DPWM Mode: DPWM control signal input.
Analog Mode: Connect to IN.
2- or 3-Bit Parallel Mode: Digital input. Most significant bit (MSB).
DPWM Mode: Connect to IN.
Analog Mode: Connect to IN.
2-Bit Parallel Mode: Connect to GND.
3-Bit Parallel Mode: Digital input (LSB).
Ultra-High-Efficiency White
Pin Description (continued)
FUNCTION
IN
LED Drivers
/2 to turn on only LED6 to LED8
9