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TEA1750 Datasheet

GreenChip III SMPS control IC

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TEA1750 pdf
TEA1750
GreenChip III SMPS control IC
Rev. 02 — 15 December 2008
Product data sheet
www.datasheet4u.com
1. General description
The GreenChip III is the third generation of green Switched Mode Power Supply (SMPS)
controller ICs. The TEA1750 combines a controller for Power Factor Correction (PFC) and
a flyback controller. Its high level of integration allows the design of a cost-effective power
supply with a very low number of external components.
The special built-in green functions provide high efficiency at all power levels. This applies
to quasi-resonant operation at high power levels, quasi-resonant operation with valley
skipping, as well as to reduced frequency operation at lower power levels. At low power
levels, the PFC switches over to burst mode control to maintain high efficiency. In burst
mode, soft-start and soft-stop functions are added to eliminate audible noise.
During low power conditions, the flyback controller switches to frequency reduction mode
and limits the peak current to 25 % of its maximum value. This will ensure high efficiency
at low power and good standby power performance while minimizing audible noise from
the transformer.
The proprietary high voltage BCD800 process makes direct start-up possible from the
rectified universal mains voltage in an effective and green way. A second low voltage
Silicon On Insulator (SOI) IC is used for accurate, high speed protection functions and
control.
The TEA1750 enables highly efficient and reliable supplies with power requirements up to
250 W, to be designed easily and with the minimum number of external components.
2. Features
2.1 Distinctive features
I Integrated PFC and flyback controller
I Universal mains supply operation (70 V AC to 276 V AC)
I High level of integration, resulting in a very low external component count and a
cost-effective design
2.2 Green features
I On-chip start-up current source
2.3 PFC green features
I Valley/zero voltage switching for minimum switching losses (patented)
I Frequency limitation to reduce switching losses
I Burst mode operation if a low load is detected at the flyback output (patented)


NXP Semiconductors Electronic Components Datasheet

TEA1750 Datasheet

GreenChip III SMPS control IC

No Preview Available !

TEA1750 pdf
NXP Semiconductors
TEA1750
GreenChip III SMPS control IC
www.datasheet4u.com
2.4 Flyback green features
I Valley switching for minimum switching losses (patented)
I Frequency reduction with fixed minimum peak current at low power operation to
maintain high efficiency at low output power levels
2.5 Protection features
I Safe restart mode for system fault conditions
I Continuous mode protection by means of demagnetization detection for both
converters (patented)
I UnderVoltage Protection (UVP) (foldback during overload)
I Accurate OverVoltage Protection (OVP) for both converters (adjustable for flyback
converter)
I Open control loop protection for both converters
I IC OverTemperature Protection (OTP)
I Low and adjustable OverCurrent Protection (OCP) trip level for both converters
I Soft (re)start for both converters
I Soft stop PFC to minimize audible noise
I Mains UnderVoltage Protection (UVP)/ brownout protection
I General purpose input for latched protection, e.g. to be used for system
Overtemperature protection
3. Applications
I The device can be used in all applications that require an efficient and cost-effective
power supply solution up to 250 W. Notebook adapters in particular can benefit from
the high level of integration.
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
TEA1750T
SO16
plastic small outline package; 16 leads; body width 3.9 mm
Version
SOT109-1
TEA1750_2
Product data sheet
Rev. 02 — 15 December 2008
© NXP B.V. 2008. All rights reserved.
2 of 29


Part Number TEA1750
Description GreenChip III SMPS control IC
Maker NXP Semiconductors
Total Page 29 Pages
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