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TEA1733MT Datasheet

GreenChip SMPS control IC

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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


NXP Semiconductors Electronic Components Datasheet

TEA1733MT Datasheet

GreenChip SMPS control IC

No Preview Available !

NXP Semiconductors
TEA1733MT
GreenChip SMPS control IC
„ Adjustable soft start operation
„ Two protection inputs (e.g. for input UVP and OVP, OTP and output OVP)
„ IC overtemperature protection
3. Applications
„ All applications requiring efficient and cost-effective power supply solutions up to
75 W.
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
TEA1733MT
SO8
plastic small outline package; 8 leads; body width 3.9 mm
Version
SOT96-1
TEA1733MT
Preliminary data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 4 February 2011
© NXP B.V. 2011. All rights reserved.
2 of 20


Part Number TEA1733MT
Description GreenChip SMPS control IC
Maker NXP
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