AAT1407 Advanced Analogic Technologies, Inc., AAT1407 Datasheet - Page 14
![no-image](/images/manufacturer_photos/0/0/13/advanced_analogic_technologies__inc__sml.jpg)
AAT1407
Manufacturer Part Number
AAT1407
Description
6 Channel Led Backlight Driver With Integrated Boost And High Frequency Direct Pwm Dimming
Manufacturer
Advanced Analogic Technologies, Inc.
Datasheet
1.AAT1407.pdf
(16 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AAT1407IMK-T1
Manufacturer:
SKYWORKS/思佳讯
Quantity:
20 000
The right half plane (RHP) zero can be calculated by:
It is recommended to design the bandwidth to one
decade lower than the frequency of RHP zero to guaran-
tee the loop stability. A series capacitor and resistor
network (R1 and C3) connected to the COMP pin sets the
pole and zero which are given by:
14
SwitchReg
TM
6 Channel LED Backlight Driver with Integrated Boost and High Frequency Direct PWM Dimming
f
Z_ESR
f
P_COM
f
Z_COM
=
2π · L
=
VIN
=
2π · R
2π · R
1
· I
V
1
1
IN
OUT
EA
1
2
· C
Figure 3: AAT1407 Equivalent Output Stage.
· C
· V
3
3
L1
OUT
w w w . a n a l o g i c t e c h . c o m
Where:
C
R
R
(2.97MΩ).
A 15nF (C3) capacitor and a 5kΩ (R1) resistor in series
are chosen for optimum phase margin and fast transient
response.
3
1
EA
is the compensation resistor
is the compensation capacitor
D1
is the output resistance of the error amplifier
ESR
C4
VOUT
R
PRODUCT DATASHEET
O
I
OUT
AAT1407
1407.2010.06.1.0