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| 型号： | APW6020C-TU |
| 厂商： | Anpec Electronics Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Advanced Dual PWM and Dual Linear Power Controllers |
| 中文描述： | 先进的双PWM和双线性功率控制器 |
| 文件页数： | 1/13页 |
| 文件大小： | 128K |
| 代理商： | APW6020C-TU |
Copyright
ANPEC Electronics Corp.
Rev. A.2 - May, 2001
APW 6020
www.anpec.com.tw
1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Advanced Dual PWM and Dual Linear Power Controllers
Features
General Description
4 Regulated Voltages are provided
Microprocessor Core (1.3V to 3.5V)
AGP Bus (1.5V or 3.3V)
Memory (1.8V) , GTL Bus (1.5V)
Simple Single-Loop Control Designs
Voltage-Mode PWM Control
Fast PWM Converter Transient Response
High-Bandwidth Error Amplifiers
Full 0% to 100% Duty Ratios
Excellent Output Voltage Regulation
Core PWM Output :
±
1% Over Temperature
Other Outputs :
±
3% Over Temperature
TTL-Compatible 5- Bit DAC Microprocessor
Core Output Voltage Selection
Wide Range - 1.3V
DC
to 3.5 V
DC
Power-Good Output Voltage Monitor
Over-Voltage and Over-Current Fault Monitors
Small Converter Size
Constant Frequency Operation
200kHz Free-Running Oscillator ; Program-
mable From 50kHz to Over 800kHz
Small External Component Count
Applications
The APW6020 provides the power control and pro-
tection for four output voltages in high-performance ,
graphics intensive microprocessor and computer
applications. The IC integrates two voltage-mode
PWM controllers and two linear controllers , as well
as the monitoring and protection functions into a single
package. One PWM controller regulates the micro-
processor core voltage with a synchronous-rectified
buck converter. The second PWM controller sup-
plies the computer’s AGP 1.5V or 3.3V bus power
with a standard Buck converter. The linear control-
lers requlate the power for the 1.5V GTL bus , and
the 1.8V power for the North/South Bridge core volt-
age and/or cache memory circuits. The APW6020
includes an Intel-compatible , TTL 5-input digital-to-
analog converter (DAC) that adjusts the core PWM
output voltage from 1.3 V
DC
to 2.05 V
in 0.05V steps
and from 2.1 V
to 3.5 V
in 0.1V increments. The
precision reference and voltage-mode control provide
±
1% static regulation. The second PWM controller’s
output is user-selectable , through a TTL-compatible
signal applied at the SELECT pin , for levels of 1.5V
or 3.3V with
±
3% accuracy. The two linear regula-
tors provide fixed output voltages of 1.5V
±
3% (V
OUT3
) and 1.8V
±
3% (V
).
The APW6020 monitors all the output voltages. A
single Power Good signal is issued when the core is
within
±
10% of the DAC setting and all other outputs
are above their under-voltage levels. Additional built-
in over-voltage protection for the core output uses
the lower MOSFET to prevent output voltages above
115% of the DAC setting. The PWM controller’s over-
current function monitors the output current by using
the voltage drop across the upper MOSFET’s r
DS(ON)
.
Motherboard Power Regulation for Computers
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