TEA1733MT View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

TEA1733MT

GreenChip SMPS control IC

NXP Semiconductors. 

TEA1733MT

GreenChip SMPS control IC

Rev. 1 — 4 February 2011

Preliminary data sheet

1. General description

The TEA1733MT is a low cost Switched Mode Power Supply (SMPS) controller IC

intended for flyback topologies. It operates in fixed frequency mode. Frequency jitter has

been implemented to reduce ElectroMagnetic Interference (EMI). Slope compensation is

integrated for Continuous Conduction Mode (CCM) operation.

The TEA1733MT IC includes OverPower Protection (OPP). This enables the controller to

operate under overpower situations for a limited amount of time.

Two pins, VINSENSE and PROTECT, are reserved for protection purposes. Input

UnderVoltage Protection (UVP) and OverVoltage Protection (OVP), output OVP and

OverTemperature Protection (OTP) can be implemented using a minimal number of

external components.

At low power levels the primary peak current is set to 25 % of the maximum peak current

and the switching frequency is reduced to limit switching losses. The combination of fixed

frequency operation at high output power and frequency reduction at low output power

provides high-efficiency over the total load range.

The TEA1733MT enables low-cost, highly efficient and reliable supplies for power

requirements up to 75 W to be designed easily and with a minimum number of external

components.

2. Features and benefits

2.1 Features

„ SMPS controller IC enabling low-cost applications

„ Large input voltage range (12 V to 30 V)

„ Very low supply current during start-up and restart (typically 10 μA)

„ Low supply current during normal operation (typically 0.55 mA without load)

„ Overpower or high/low line compensation

„ Adjustable overpower time-out

„ Adjustable overpower restart timer

„ Fixed switching frequency with frequency jitter to reduce EMI

„ Frequency reduction with fixed minimum peak current to maintain high-efficiency at

low output power levels

„ Slope compensation for CCM operation

„ Low and adjustable OverCurrent Protection (OCP) trip level

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