APW8722 Datasheet, PDF (1/23 Pages) Anpec Electronics Coropration – 5V to 12V Single Buck Voltage Mode PWM Controller

APW8722/A/B/C/D
5V to 12V Single Buck Voltage Mode PWM Controller
Features
General Description
• Wide 5V to 12V Supply Voltage
The APW8722 is a voltage mode, fixed 200kHz/300kHz/
• Power-On-Reset Monitoring on VCC
600kHz switching frequency, synchronous buck converter.
• Excellent Output Voltage Regulations
The APW8722 allows wide input voltage that is either a
- 0.6V Internal Reference for APW8722/A/D
single 5~12V or two supply voltage(s) for various
- 0.8V Internal Reference for APW8722B/C
applications. A power-on-reset (POR) circuit monitors the
- ±0.6% Over-Temperature Range
VCC supply voltage to prevent wrong logic controls. A built-
• Integrated Soft-Start
in soft-start circuit prevents the output voltages from over-
• Voltage Mode PWM Operation with External ^{shoot as well as limits the input current. An internal 0.6V}
temperature-compensated reference voltage with high
Compensation
accuracy is designed to meet the requirement of low out-
• Up to 90% Duty Ratio for Fast Transient Response _{put voltage applications. The APW8722 provides excel-}
• Constant Switching Frequency
lent output voltage regulations against load current
- 300kHz ±10% for APW8722/B
variation.
- 200kHz ±10% for APW8722C
The controller’s over-current protection monitors the out-
- 600kHz ±10% for APW8722A/D
put current by using the voltage drop across the RDS
• Integrated Bootstrap Forward P-CH MOSFET
(ON) of low-side MOSFET, eliminating the need for a cur-
• 50% Under-Voltage Protection
• 125% Over-Voltage Protection
• Adjustable Over-Current Protection Threshold
- Using the R_DS(ON) of Low-Side MOSFET
• Shutdown Control by COMP
• SOP-8P Package
• Lead Free and Green Devices Available
(RoHS Compliant)
rent sensing resistor that features high efficiency and
low cost. In addition, the APW8722 also integrates excel-
lent protection functions. The over-voltage protection (OVP)
, under-voltage protection (UVP). OVP circuit which moni-
tors the FB voltage to prevent the PWM output from over
voltage, and UVP circuit which monitors the FB voltage to
prevent the PWM output from under voltage or short circuit.
The APW8722 is available in SOP-8P packages
Applications
• Graphic Cards
• DSL, Switch HUB
• Wireless Lan
• Notebook Computer
• Mother Board
• LCD Monitor/TV
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.
Copyright © ANPEC Electronics Corp.
1
Rev. A.3 - Jun., 2013
www.anpec.com.tw