TOP232G

Duty Cycle:	78%
Mounting Type:	Surface Mount
Supplier Device Package:	SMD-8B
Package / Case:	8-SMD (7 Leads), Gull Wing
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Frequency Control
Fault Protection:	Current Limiting, Over Temperature, Over Voltage
Power (Watts):	15W
Frequency - Switching:	66kHz ~ 132kHz
Series:	TOPSwitch®-FX
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Part Status:	Obsolete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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Introduction

TOP232G is a high-performance, low-cost, monolithic control circuit for off-line switched mode power supplies (SMPS). It is specifically designed for the construction of universal off-line power supplies from to 350W. The TOP232G offers a combination of features and assembly time not available in any other cost and performance off-line control. The device reads current levels and voltages, senses SMPS parameters such as current and power limit, and then responds to over-voltage, under-voltage, over-current, and short-circuit conditions.

PMIC - AC DC Converters

AC DC converters are used in many applications for converting alternating current (AC) to direct current (DC). TOP232G is used in AC DC converters in which it acts as a monitoring and control circuit. The TOP232G monitors the input AC or DC voltage and current, as well as the output voltage and current from the DC circuit. Additionally, it monitors static parameters, such as current and power limit and over-voltage, under-voltage, over-current, and short circuit conditions. When used in AC DC converters, the power factor of the system can also be improved. This is achieved by dynamically adjusting the average order of the PWM signal depending on the line load and input voltage. To do this, the TOP232G is equipped with an advanced voltage/current loop control system. This system compares the ratio of the sensed input power to the sensed output power to ensure that the energy drawn from the AC source is not in excess of the energy required by the output load.

Offline Switchers

Offline switchers are used in off-line power supplies, where the device is powered from a power source external to the device being powered. TOP232G is an ideal choice for offline switchers due to its low cost, high performance and long life. The TOP232G provides an efficient means for regulating output voltage and current for reliable and safe operation of connected loads. It monitors the input voltage, current, output current and power limit, and responds to over-voltage, under-voltage, over-current and short-circuit conditions. In addition, the TOP232G incorporates a protection circuit that extends the life of the switch by monitoring the temperature of the control chip and regulating the output current accordingly. TOP232G also features several different operating modes that allow it to work efficiently in a wide range of applications. It operates in discontinuous mode (DCM) when the load current is low, which helps in improving the efficiency of the system. It also operates in critical conduction mode (CMM) when the load current is high to ensure that the output voltage is always maintained at the sufficient level.

Conclusion

The TOP232G is a high-performance, low-cost, and compact monolithic circuit ideal for off-line switched mode power supplies. It can be used in both AC DC converters and offline switchers for efficient power conversion and reliable output. With its advanced monitoring and protection systems, the TOP232G is capable of regulating output voltage and current in a wide variety of operating modes to extend switch and system life. Additionally, its integrated components reduce assembly time and cost.

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