TOP243F

Duty Cycle:	66.5%
Mounting Type:	Through Hole
Supplier Device Package:	TO-262-7C
Package / Case:	TO-262-7 (Formed Leads), 6 Leads
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Frequency Control
Fault Protection:	Current Limiting, Over Temperature, Over Voltage
Power (Watts):	45W
Frequency - Switching:	66kHz ~ 132kHz
Series:	TOPSwitch®-GX
Voltage - Supply (Vcc/Vdd):	--
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Obsolete
Packaging:	Tube

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TOP243F Application Field and Working Principle

PMIC - AC DC Converters, Offline Switchers

The TOP243F is an integrated offline switcher having excellent cost/performance that is suitable for a broad range of low power ac-dc converters. With its innovative design, this device also excels in applications that require a current mode control scheme and external current sensing.The TOP243F has a unique current mode control feature. It uses an external current sense resistor to sense the load current, and uses an internal voltage reference to compare the sensed current and regulate output voltage to a desired level. This device is specifically designed for high efficiency ac-dc converters that require high power density without compromising acoustic noise. The device requires minimal to no external components for most applications.The TOP243F also offers a wide range of features designed to improve its performance and reduce cost. It features an integrated thermal shutdown circuit that protects the device from overheating in case of a fault. Additionally, it features a programmable cycle-by-cycle short circuit protection for enhanced system reliability. Additionally, an internal frequency jitter circuit prevents the input frequency and ripple from affecting the operation of the device.The TOP243F is suitable for a wide range of applications. It is ideal for low power ac-dc adapters, such as laptop power adapters and other low power portable equipment. It also finds applications in lighting, as well as industrial control systems where it can regulate both dc and ac outputs. Moreover, because of its current mode control design, the TOP243F is also suitable for motor control applications, such as motor speed control, motor voltage control and motor position control.In addition to its innovative current mode control feature, the device also offers a variety of protection features to ensure system safety. It utilizes a Burst-Mode control scheme to deliver power efficiently while minimizing acoustic noise. Additionally, the device includes an Over Voltage Protection (OVP) circuit that will shut down the device if the output voltage exceeds a pre-determined level. It also features an Under Voltage Lock-Out (UVLO) circuit that will prevent the device from starting up if the input voltage is too low. In summary, the TOP243F is a versatile integrated offline switcher designed for a broad range of ac-dc converters. It features an innovative current mode control scheme and numerous protection features. It is suitable for a variety of applications such as ac-dc converters, lighting and motor control. Additionally, it delivers superior efficiency and acoustic noise levels with minimal input ripple.

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