The JTMA7159A is a dual channel voltage mode and syn-chronou

1.产品概述 2.产品特点 3.应用范围 4.下载产品资料PDF文档
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品

一,产品概述(General Description)
The JTMA7159A is a dual channel voltage mode and syn-chronous
PWM controller which drives dual N-channel MOSFETs. The two channels
are operated with 180 de-gree 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, over-temperature, and
over-current protections.
The JTMA7159A provides excellent regulation for output load variation.
The internal 1.0V temperature-compen- sated 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 JTMA7159A has been equipped with excellent pro-tection
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 ex-ceeds 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) moni-tor the FB
voltage to protect JTMA7159A from burnout when output voltage is
under 50% or over 120% of normal out-put voltage. The JTMA7159A
is available in SOP-20 package.

二.产品特点(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 Package
Lead Free and Green Devices Available (RoHS Compliant)

三,应用范围 (Applications)

SMPS

四.下载产品资料PDF文档

JTMA7159

五,产品封装图 (Package)

六.电路原理图

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