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NXP Semiconductors Electronic Components Datasheet

TEA1738T Datasheet

GreenChip SMPS control IC

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TEA1738T pdf
TEA1738T; TEA1738LT
GreenChip SMPS control IC
Rev. 2 — 14 January 2011
Product data sheet
1. General description
The TEA1738(L) is a low cost Switched Mode Power Supply (SMPS) controller IC
intended for flyback topologies. The TEA1738(L) operates in peak current and frequency
control mode. Frequency jitter has been implemented to reduce ElectroMagnetic
Interference (EMI). Slope compensation is integrated for Continuous Conduction Mode
(CCM) operation.
The TEA1738(L) 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), output OverVoltage Protection (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 TEA1738(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.
2. Features and benefits
2.1 Features
„ SMPS controller IC enabling low-cost applications
„ Large input voltage range (12 V to 30 V)
„ Integrated OverVoltage Protection (OVP) on pin VCC
„ Very low supply current during start-up and restart (10 μA typical)
„ Low supply current during normal operation (0.55 mA typical 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 at medium power operation to maintain high efficiency
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NXP Semiconductors Electronic Components Datasheet

TEA1738T Datasheet

GreenChip SMPS control IC

No Preview Available !

TEA1738T pdf
NXP Semiconductors
TEA1738T; TEA1738LT
GreenChip SMPS control IC
„ Frequency reduction with fixed minimum peak current at low power to maintain high
efficiency at low output power levels
„ Frequency increase at peak power operation
„ 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 OTP)
„ 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
TEA1738T
SO8
plastic small outline package; 8 leads; body width 3.9 mm
TEA1738LT
SO8
plastic small outline package; 8 leads; body width 3.9 mm
Version
SOT96-1
SOT96-1
TEA1738T_TEA1738LT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 14 January 2011
© NXP B.V. 2011. All rights reserved.
2 of 21


Part Number TEA1738T
Description GreenChip SMPS control IC
Maker NXP
Total Page 21 Pages
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