APW7074
APW7074 is Synchronous Buck PWM Controller manufactured by Anpec Electronics Coropration.
Features
- Single 12V Power Supply Required
- 0.8V Reference with 1% Accuracy
- Shutdown and Soft-Start Function
- 300k Hz Fixed Switching Frequency
- Voltage Mode PWM Control Design
- Up to 100% Duty Cycle
- Under-Voltage Protection
- Over-Current Protection
- SOP-14 Package
- Lead Free and Green Devices Available
(Ro HS pliant)
Applications
- Graphic Cards
Synchronous Buck PWM Controller
General Description
The APW7074 is a voltage mode synchronous PWM controller with fixed 300k Hz switching frequency, which drivers dual N-channel MOSFETs. The device integrates the controling, monitoring, and protecting functions into a single package, which provides a controlled power output with under-voltage and over-current protections.
The APW7074 provides excellent regulation for output load variation. The internal 0.8V temperature-pensated reference voltage is designed for the requirements of low output voltage applications.
The APW7074 has excellent protection functions: POR, OCP, and UVP. The Power-On-Reset (POR) circuit can monitor the VCC, EN, and OCSET voltage to make sure the supply voltage exceeds their threshold voltage while the controller is running. The Over-Current Protection (OCP) monitors the output current by using the voltage drop across the upper and lower MOSFET’s RDS .(ON) When the output current reaches the trip point, the controller will run the soft-start function until the fault events are removed. The Under-Voltage Protection (UVP) monitors the voltage at FB pin (V ) for short-circuit pro-
FB tection when the VFB is less 50% VREF, the controller will shutdown the IC directly.
Pin Configuration
NC OCSET
SS P
FB EN GND
1 14 V CC 2 13 PV CC 3 12 LGA TE 4 11 PGND 5 10 BOOT 6 9 UGA TE 7 8 PHASE
SOP-14 TOP V IEW
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....
