tea1733t NXP Semiconductors, tea1733t Datasheet
tea1733t
Manufacturer Part Number
tea1733t
Description
Greenchip Smps Control Ic
Manufacturer
NXP Semiconductors
Datasheet
1.TEA1733T.pdf
(17 pages)
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1. General description
2. Features
2.1 Features
The TEA1733(L) is a low cost Switched Mode Power Supply (SMPS) controller IC
intended for flyback topologies. The TEA1733(L) operates in fixed frequency mode. To
reduce ElectroMagnetic Interference (EMI), frequency jitter has been implemented. For
Continuous Conduction Mode (CCM) operation, slope compensation is integrated.
The TEA1733(L) IC features an OverPower Protection (OPP). The controller can be set to
accept an overpower situation for a limited amount of time.
Two pins are reserved for protection purposes. Input UnderVoltage Protection (UVP) and
OverVoltage Protection (OVP), output OVP and OverTemperature Protection (OTP) 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(L) 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.
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TEA1733T; TEA1733LT
GreenChip SMPS control IC
Rev. 01 — 26 October 2009
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 A)
Low supply current during normal operation (typically 0.5 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 at low power operation to
maintain high efficiency at low output power levels
Slope compensation for CCM operation
Low and adjustable OverCurrent Protection (OCP) trip level
Adjustable soft start
Two protection inputs (e.g. for input UVP and OVP, OTP and output OVP)
IC overtemperature protection
Objective data sheet
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