APW7190 Datasheet, PDF (1/23 Pages) Anpec Electronics Coropration – 5V or 12V Single Output PWM Controller with PFM

APW7190
5V or 12V Single Output PWM Controller with PFM
Features
General Description
• Operating with Single 5~12V Supply Voltage or
The APW7190 is a single-phase, constant-on-time, syn-
Two Supply Voltages
• ±0.6% 0.5V Reference
chronous PWM controller, which drives N-channel MOS-
FETs. The APW7190 allows wide input voltage that is
either a single 5~12V or two supply voltage(s) for various
- Over Line, Load Regulation, and Operating Temp. applications. An internal 0.5V temperature-compensated
• Drive Dual Low Cost N-Channel MOSFETs
- Adaptive Shoot-Through Protection
reference voltage with high accuracy is designed to meet
the requirement of low output voltage applications.
The PWM controller operates fixed 300kHz pseudo-con-
• Power-On-Reset Monitoring on VCC Pin
stant frequency PWM with an adaptive constant-on-time
• High Efficiency at Light Load
• Constant-On-Time Control Scheme
control. The device provides excellent transient response
and accurate DC voltage output in either PFM or PWM
Mode. In Pulse Frequency Mode (PFM), the APW7190 pro-
- Switching Frequency Compensation for PWM
vides very high efficiency over light to heavy loads with
Operation
• 300kHz Constant Switching Frequency
loading-modulated switching frequencies. The device
works in ultrasonic mode with PFM at no load. The unique
ultrasonic mode maintains the switching frequency above
• Integrated MOSFET Drivers and Bootstrap Diode 20kHz, which eliminates noise in audio applications.
• Internal Integrated Soft-Start
The APW7190 is equipped with accurate current-limit,
output under-voltage, and output over-voltage protections.
• Built-In Ultrasonic Mode Control Scheme with PFM _{A Power-On-Reset function monitors the voltage on VCC}
• Adaptive Dead-Time Control
to prevent wrong operation during power-on. The
• Power Good Monitoring
• 70% Under-Voltage Protection
APW7190 has a 4ms digital soft-start to ramp up the
output voltage with programmable slew rate to reduce
the start-up current. A soft-stop function actively dis-
• 125% Pre-Over-Voltage and Over-Voltage
charges the output capacitors with controlled reverse in-
Protection
• Adjustable Current-Limit Protection
ductor current.
The APW7190 is available in TDFN3x3-10 package.
- Using Low-Side MOSFET’s R_DS(ON)
• Over-Temperature Protection
Applications
• 3mmx3mm TDFN-10 (TDFN3x3-10) Package
• Mother Board
• Lead Free and Green Devices Available
• Low Cost PC
(RoHS Compliant)
• 5V or 12V-Input DC/DC Regulators
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.1 - Mar., 2009
www.anpec.com.tw