tea1541 NXP Semiconductors, tea1541 Datasheet - Page 3

• Manufacturer Part Number: tea1541
• Description: Smps Control Ic With Synchronization Function
• Manufacturer: NXP Semiconductors

Philips Semiconductors
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2003 Aug 11
TEA1541P
Universal mains supply operation (70 to 276 V AC)
High-level of integration requiring few external
components
Synchronization with internal frequency divider
Frequency independent over-power protection.
Frequency reduction at low power standby for improved
system efficiency (<3 W)
Burst mode operation for very low power standby
levels (<1 W)
On-chip start-up current source.
Safe restart mode for system fault conditions
Continuous mode protection using demagnetization
detection (zero switch-on current)
Accurate and adjustable overvoltage protection
Winding short-circuit protection
Undervoltage protection (foldback during overload)
Overtemperature protection
Adjustable low overcurrent protection (OCP) trip level
Soft (re)start
Mains voltage-dependent operation-enabling level.
SMPS control IC with
synchronization function
NUMBER
FEATURES
ORDERING INFORMATION
TYPE
Distinctive features
Green features
Protection features
NAME
DIP8
plastic dual-in-line package; 8 leads (300 mil)
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DESCRIPTION
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The TEA1541 is a second generation GreenChip
Switched Mode Power Supply (SMPS) controller IC that
operates directly from the rectified universal mains.
A high-level of integration provides a cost-effective power
supply requiring only a few external components.
The TEA1541 controller enables easy design of highly
efficient, reliable switched mode power supplies.
Its internal oscillator can be synchronized to pulses from
an external signal source. External synchronizing pulses
whose frequency is above the SMPS switching frequency
range are divided by an internal divider.
Special built-in green functions ensure optimum efficiency
at all power levels. At low power (standby) levels, the
SMPS supply operates at a lower frequency. In burst
standby mode, power consumption can be reduced to less
than 1 W.
The proprietary EZ-HV SOI process allows start-up
directly from the rectified mains voltage, avoiding the need
for bleeder circuits, and also saves energy.
A low voltage BICMOS implements accurate control and
high speed protection functions.
(1) GreenChip is a trademark of Koninklijke Philips
PACKAGE
Electronics N.V.
GENERAL DESCRIPTION
Product specification
TEA1541
VERSION
SOT97-1
TM(1)