AP2001
Monolithic Dual Channel PWM Controller
Features
- Dual PWM Control Circuitry
- Operating voltage can be up to 50V
- Adjustable Dead Time Control (DTC)
- Under voltage Lockout (UVLO) Protection
- Short Circuit Protection (SCP)
- Variable Oscillator Frequency...... 500Khz Max
- 2.5V voltage reference Output
- 16-pin PDIP and SOP packages
General Description
The AP2001 integrates Pulse-width-Modulation
(PWM) control circuit into a single chip, mainly
designs for power-supply regulator. All the functions
included an on-chip 2.5V reference output, two
error amplifiers, an adjustable oscillator, two
dead-time comparators, UVLO, SCP, DTC circuitry,
and dual common-emitter(CE) output transistor
circuit.
Recommend the output CE transistors as pre-driver
for Driving externally. The DTC can provide from
0% to 100%. Switching frequency can be
adjustable by trimming RT and CT. During low VCC
situation, the UVLO makes sure that the outputs
are off until the internal circuit is operational
normally.
Applications
- Backlight inverter
- DC/DC converts in computers, etc.
Pin Assignments
( Top View )
CT
RT
EA1+
EA1-
FB1
DTC1
OUT1
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
Pin Descriptions
Name
REF
SCP
EA2+
EA2-
FB2
DTC2
OUT2
VCC
Description
Timing Capacitor
Timing Resistor
Error Amplifier Input(+)
Error Amplifier Input(-)
Feedback Loop Compensation
Dead Time Control
Pre-driver Output
Ground
Supply Voltage
Short Circuit Protection
Voltage Reference
CT
RT
EA+
EA -
FB
DTC
OUT
9
PDIP/SOP
GND
VCC
SCP
REF
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. 0.3 Feb 20, 2004
1/8
ANACHIP [ ANACHIP CORP ]
