controllers into a single chip, mainly designs for
power-supply regulator. All the functions included
an on-chip 1.25V/0.8V reference output, error
amplifier, UVLO, current limit. During low VCC
situation, the UVLO makes sure that the outputs
are off until the internal circuit is operational
normally.
Applications
- Backlight inverter
- LCD Monitor
- XDROM, XDSL Product
Pin Assignment
(Top View)
GND 1
EN1/2 2
OUT1 3
FB1
4
8
AP450
7
6
5
Vcc
V
REF
OUT2
FB2
Pin Descriptions
Pin
Name
GND
EN1/2
OUT1
FB1, 2
OUT2
V
REF
Vcc
Pin
No.
1
2
3
4, 5
6
7
8
Description
Signal Ground
Channel 1/2 Enable Pin
Linear Controller CH1output
Voltage Feedback
Linear Controller CH2 output
1.25V/0.8V Output
Supply Voltage
SOP-8L/PDIP-8L
Ordering Information
AP450 X X X
Bandgap Version
A: 1.25V
BG
B: 0.8V
BG
Package
N: PDIP-8L
S: SOP-8L
Packing
Blank: Tube
A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.1 Sep 7, 2004
1/6
AP450
2 Channel Linear Controller with Enable Function
Block Diagram
+
FB2
Amp
_
LPF
Buffer
Current
Limit
OUT2
+
FB1
EN1/2
_
Amp
LPF
Buffer
Current
Limit
OUT1
V
REF
2.5V
Bandgap
Reference
1.25V/0.8V
UVLO
Vcc
GND
Absolute Maximum Ratings
Symbol
V
CC
V
I
V
O1
/ V
O2
T
OP
T
ST
T
LEAD
Supply voltage
Amplifier input voltage
CH1 / CH1Linear driver voltage to ground
Operating temperature range
Storage temperature range
Lead temperature 1.6 mm(1/16 inch) from case for 10 seconds
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