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NXP Semiconductors Electronic Components Datasheet

TEA1733 Datasheet

GreenChip SMPS control IC

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TEA1733(L)
GreenChip SMPS control IC
Rev. 01.11 — 10 July 2009
Objective specification
1. General description
The TEA1733 is a low cost Switched Mode Power Supply (SMPS) controller IC intended
for flyback topologies.
The TEA1733 operates in fixed frequency mode. To reduce EMI, frequency jitter has been
implemented. For Continuous Conduction Mode (CCM) operation, slope compensation is
integrated. The controller can be set to accept an over-power situation for a limited
amount of time.
Two pins are reserved for protection purposes. Input under and over voltage protection,
output over voltage protection and over temperature protection can be implemented with 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 the 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 TEA1733 enable 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
2.1 Features
„ SMPS controller IC enabling low cost applications
„ Large input voltage range (12V up to 30V)
„ Very low supply current during start-up and restart (typ. 10μA)
„ Low supply current during normal operation (typ. 500μA without load)
„ Over-power compensation
„ Adjustable over-power time-out
„ Adjustable over-power restart timer
„ Fixed switching frequency with frequency jitter to reduce EMI
„ Frequency reduction with fixed minimum peak current at low power operation to
maintain high efficiency at low output power levels
„ Slope compensation for CCM operation
„ Low and adjustable over current protection (OCP) trip level
„ Soft start
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NXP Semiconductors Electronic Components Datasheet

TEA1733 Datasheet

GreenChip SMPS control IC

No Preview Available !

NXP Semiconductors
TEA1733
GreenChip SMPS control IC
„ Two protection inputs (e.g. for input under voltage and over voltage protection, over
temperature protection and output over voltage protection)
3. Applications
„ The devices can be used in all applications that require an efficient and cost-effective
power supply solution up to 75 W.
TEA1733
Objective specification
Rev. 01.11 — 10 July 2009
© NXP B.V. 2009. All rights reserved.
2 of 19


Part Number TEA1733
Description GreenChip SMPS control IC
Maker NXP
Total Page 19 Pages
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