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Anachip
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AP2008 Datasheet Preview

AP2008 Datasheet

PWM Buck Controller

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AP2008 pdf
PWM Buck Controller
„ Features
- PWM Buck Control Circuitry
- Operating voltage can be up to 20V
- Under voltage Lockout (UVLO) Protection
- Short Circuit Protection (SCP)
- Soft-start circuit
- Variable Oscillator Frequency -- 300KHz Max
- 0.77V voltage reference Output
- 8-pin PDIP and SOP packages
„ Applications
- Backlight inverter
- LCD Monitor
- XDROM, XDSL Product
- DC/DC converters in computers, etc.
„ Pin Assignment
( Top View )
OUT
VCC
COMP
FB
1
2
3
4
8 GND
7 CT
6 SS
5 SCP
PDIP/SOP
AP2008
„ General Description
The AP2008 integrates Pulse-Width-Modulation
(PWM) control circuit into a single chip, mainly
designs for power-supply regulator. All the functions
included an on-chip 0.77V reference output, an
error amplifier, an adjusted oscillator, a soft-start,
UVLO, SCP circuitry, and a push-pull output circuit.
Switching frequency can be adjustable by trimming
CT. During low VCC situation, the UVLO makes
sure that the outputs are off until the internal circuit
is operational normally.
„ Pin Descriptions
Name
CT
FB
SS
COMP
OUT
GND
VCC
SCP
Description
Timing Capacitor
Voltage Feedback
Soft-Start.
Feedback Loop Compensation
PWM Output
Ground
Supply Voltage
Short Circuit Protection
„ Ordering Information
AP2008 X X X
Package
Lead Free
Packing
N: PDIP-8L Blank : Normal
Blank : Tube
S: SOP-8L L : Lead Free Package 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. 1.0 Oct 11, 2004
1/8



Anachip
Anachip

AP2008 Datasheet Preview

AP2008 Datasheet

PWM Buck Controller

No Preview Available !

AP2008 pdf
PWM Buck Controller
„ Block Diagram
VCC
0.77V
Bandgap
Reference
2.5V
Internal use
UVLO
SS CT
10K-300KHz / CT value
Oscillator
FB
COMP
Error Amplifier
-
1.5V +
Iss
PWM Amplifier
+
+
-
0.7V -
+
AP2008
VCC
OUT
SCP
GND
„ Absolute Maximum Ratings
Symbol
VCC
VI
VO
ISOURCE
ISINK
TOP
TST
TLEAD
Parameter
Supply voltage
Amplifier input voltage
Collector output voltage
Source current
Sink current
Operating temperature range
Storage temperature range
Lead temperature 1.6 mm(1/16 inch) from case for 10 seconds
Rating
22
20
VCC-1.0V
200
200
-20 to +85
-65 to +150
260
Unit
V
V
V
mA
mA
oC
oC
oC
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Oct 11, 2004
2/8


Part Number AP2008
Description PWM Buck Controller
Maker Anachip
Total Page 8 Pages
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AP2008 pdf
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