DATA SHEET
AAT2822/2823/2824/2825
TFT-LCD DC/DC Converter with WLED Driver and VCOM Buffer
Component
Part Number
Description
Manufacturer
TFT-LCD DC-DC Converter with WLED
Driver and VCOM Buffer
U1
AAT2822IBK
Skyworks
C1
C2
C3, C4
C5
C6
C7
C8
C9
GRM188R61A475K
GRM188R71C104K
GRM21BR61C106K
GRM31CR71H225K
GRM31CR61C226M
GRM188R71A224K
GRM1885C1H101J
GRM2195C1H822J
GRM188R61E104K
CAP CERAMIC 4.7μF 0603 X5R 10V 10%
CAP CERAMIC 0.1μF 0603 X7R 16V 10%
CAP CERAMIC 10μF 0805 X5R 16V 10%
CAP CERAMIC 2.2μF 1206 X7R 50V 10%
CAP CERAMIC 22μF 1206 X5R 16V 20%
CAP CERAMIC 0.22μF 0603 X7R 10V10%
CAP CERAMIC 100pF 0603 COG 50V 5%
CAP CERAMIC 8nF 0805 X7R 50V 10%
CAP CERAMIC 0.1μF 0603 X5R 25V 10%
Murata
C10, C12, C22, C23
C11, C13, C14,
C15, C27, C28
C16, C18
C17, C19, C20,
C21, C29, C30
GRM188R71H104K
GRM188R61E224K
GRM21BR71H224K
CAP CERAMIC 0.1μF 0603 X7R 50V 10%
CAP CERAMIC 0.22μF 0603 X5R 25V10%
CAP CERAMIC 0.22μF 0805 X7R 50V10%
CAP CERAMIC 10nF 0603 X7R 50V 10%
C24
C25
GRM188R71H103K
NC
C26
GRM1885C1H100J
BAT54SDW-7-F
SS16L
CAP CERAMIC 10pF 0603 COG 50V 5%
Schottky Diode Array 30V SC70-6
Schottky Diode 1A 60V Micro SMP
POWER INDUCTOR 2.2μH 3.0A SMD
A1, A2, A3, A4
D1, D2
L1, L2
Diode Inc
Taiwan Semiconductor
Sumida
CDRH5D16-2R2
Adjustable Value (See Equations.1 – 5
and Table 5); 0603
R2, R4, R6, R8, R9
R3, R7, R10
R5, R13, R14
R11
RC0603FR-0760K4L
RC0603FR-0710KL
RC0603FR-07200KL
RC0603FR-0717K4L
RC0603FR-070RL
RC0603FR-07100RL
NC
Res 6.04kΩ 1/10W 1% 0603 SMD
Res 10kΩ 1/10W 1% 0603 SMD
Res 200kΩ 1/10W 1% 0603 SMD
Res 17.4kΩ 1/10W 1% 0603 SMD
Res 0Ω 1/10W 1% 0603 SMD
Yageo
R12
R15, R19, R20, R21
R17
R18, R22, R23, R25
Res 100Ω 1/10W 1% 0603 SMD
Table 3: AAT2822IBK Evaluation Board Bill Of Materials (BOM).
Panel Sizes (inches)
WLED Matrix (Series and Parallel)
Ballast Resistor R8 (Ω)
5
5.6
7
8
10
5
3S5P
3S6P
3S9P
2.37
2.0
1.3
1.2
1.0
4.7
3S10P/11P
3S13P
7S2P
Table 4: Ballast Resistor Selection for Different Panel Sizes.
VAVDD
VFB
VAVDD
0.6V
Eq. 1: R2 = R3 ·
-1 = 6.04kΩ ·
-1
VGL
VFBN
VGL
1.2V
Eq. 2:
R9 =
· R10
=
· 6.04kΩ
VGH
VFBP
VGH
0.6V
R = R ·
- 1 = 6.04kΩ ·
- 1
Eq. 3:
6
7
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
22
202081B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 2, 2012
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
