MAX1579ETG+ Maxim Integrated Products, MAX1579ETG+ Datasheet - Page 12

• Manufacturer Part Number: MAX1579ETG+
• Description: IC PS BIAS/WHITE LED TFT 24-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1579ETG+

• Applications: LCD Display
• Current - Supply: 3mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Number Of Segments: 8
• Operating Supply Voltage: 2.7 V to 5.5 V
• 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

Complete Bias and White LED Power Supplies
for Small TFT Displays
Table 1. Recommended Components for
the Typical Application Circuit
+ Denotes lead-free package.
12
MAX1579ETG
MAX1579ETG+
DESIGNATION
C9, C10, C11,
Ordering Information (continued)
C4, C5, C12
C13, C14
PART
______________________________________________________________________________________
C1, C8
C6, C7
D2–D7
R2, R3
C2
C3
D1
L1
R1
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
4.7µF, 6.3V X5R ceramic capacitors (0603)
Murata GRM188R60J475KE19
0.1µF, 6.3V X5R ceramic capacitor (0402)
TDK C1005X5R1A104K
0.1µF, 50V X7R ceramic capacitor (0603)
TDK C1608X7R1H104K
1µF, 16V X7R ceramic capacitors (0805)
TDK C2012X7R1C105K
2.2µF, 6.3V X5R ceramic capacitors (0603)
Taiyo Yuden JMK107BJ225KA
1µF, 6.3V X5R ceramic capacitors (0402)
Murata GRM155R60J105KE19
40V, 0.5A Schottky diode
International Rectifier MBRX0540
White LEDs
Nichia NSCW215T
22µH, 250mA inductor (1210)
Murata LQH32CN220K53
22.1Ω ±1% resistor (0402)
200Ω ±5% resistors (0402)
DESCRIPTION
PIN-PACKAGE
24 Thin QFN 4mm x 4mm
(T2444-4)
24 Thin QFN 4mm x 4mm
(T2444-4)
Figure 3. Typical Application Circuit
MAIN OUTPUT
2.7V TO 5.5V
PWM OR
ANALOG
DIMMING
+5V, 25mA
OFF
4.7μF
INPUT
C1
ON
0.1μF
2.2μF
2.2μF
4.7μF
1μF
C9
C2
C6
C7
C8
IN
CTRL
COMP
ONBIAS
C1P
C1N
C2P
C2N
V
MAIN
GND
DD
MAX1578
MAX1579
22μH
L1
PGND
PMPB
PMP
OUT
CU1
CD1
CU2
CD2
POS
CU3
NEG
CS
LX
C14
1μF
C13
1μF
D1
C12
1μF
C11
1μF
C5
1μF
C10
1μF
200Ω
200Ω
R2
R3
C3
0.1μF
OUTPUT UP TO
8 LEDS IN SERIES
C4
1μF
POSITIVE OUTPUT
+15V, 100μA
NEGATIVE OUTPUT
-10V, 100μA
R1
22.1Ω
D2–D7