APW7159C中文资料茂达电子数据手册PDF规格书

特性 Features

· Single 12V Power Supply Required

· Excellent Output Voltage Regulation

- 1.0V±0.8% Internal Reference Over Line and

Temperature

· Simple Single Loop Control Design

- Voltage Mode PWM Control

· 0~100% Duty Ratio

· Programmable Frequency Range from 50kHz to

400kHz (Constant 50kHz when Floating)

· Integrated Soft-Start and Soft-Off (Patent Pending)

· Support Pre-Biased Power-On

· Both Channel with 180o Phase Shift

· Integrated Boot-Strap Diode

· Over-Current Protection

- Sense High Side MOSFET’s RDS(ON)

· 120% Over-Voltage Protection

· 50% Under-Voltage Protection

· Over-Temperature Protection

· Available in SOP-20, TSSOP-20 and TSSOP-20P

Packages

· Lead Free and Green Devices Available

(RoHS Compliant)

Applications

· SMPS

General Description

· SMPS

Simplified Application Circuit

S

The APW7159C is a dual channel voltage mode and synchronous PWM controller which drives dual N-channel

MOSFETs. The two channels are operated with 180 degree phase shift.

The device integrates all of the control, monitoring, and

protecting functions into a single package; provides two

controlled power output with over-voltage, overtemperature, and over-current protections.

The APW7159C provides excellent regulation for output

load variation. The internal 1.0V temperature-compensated reference voltage provides high accuracy of 0.8%

over line and temperature. The device includes a 50kHz

free-running triangle-wave oscillator that is adjustable

from 50kHz to 400kHz.

The APW7159C has been equipped with excellent protection functions: POR, OCP, UVP, and OVP protections.

The Power-On-Reset (POR) circuit can monitor the VCC

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 high

side MOSFET’s RDS(ON). When the output current reaches

the trip point, the controller will be latched. Under-Voltage

Protection(UVP) and Over-Voltage Protection (OVP) monitor the FB voltage to protect APW7159C from burnout

when output voltage is under 50% or over 120% of normal output voltage. The APW7159C is available in SOP20, TSSOP-20 and TSSOP-20P packages.