AAT1164 Advanced Analog Technology, Inc., AAT1164 Datasheet - Page 21

• Manufacturer Part Number: AAT1164
• Description: Triple-channel Tft Lcd Power Solution With Operational Amplifiers
• Manufacturer: Advanced Analog Technology, Inc.

Example 6:
The output voltage ripple of V
1%, the minimum capacitance value can be calculated
as
Operational Amplifier
The AAT1164 has five independent amplifiers. The
operational amplifiers are usually used to drive V
and the gamma correction divider string for TFT-LCD.
The output resistors and capacitors of amplifiers are
used as low pass filters and compensators for unity gain
stable.
η : Efficiency, about 60% at charge pump circuit
C
C
C
C2, C4, C9, C10, C12
OUT
OUT
OUT
DESIGNATION
(V
(V
U1, U2, U3
C5, C6, C7
≥
Table 5. Recommended Components
OUT3
OUT2
2V
C3
I
D
LOAD
L
ripple S
)
)
≥
≥
f
η 2 250mV 1.19MHz
η 2 60mV 1.19MHz
×
×
Advanced Analog Technology, Inc.
30mA
30mA
6.8 µH, 1.8A,
MITSUMI C6-K1.8L 6R8
200mA 30V Schottky barrier
diode (SOT-23),
DIODES BAT54S
2A 20V rectifier diode
DIODES DFLS220L
10 µF, 25V X5R ceramic
capacitor
1 µF, 25V X5R ceramic
capacitor
0.1 µF, 50V X5R ceramic
capacitor
×
×
OUT3
DESCRIPTION
and V
≈
≈
0.33µF
–
0.1µF
OUT2
–
Advanced Analog Technology, Inc . –
is under
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Page 21 of 24
Version 1.00
AAT1164/AAT1164B/AAT1164C
–
April 2007