TEA1752T
HV start-up DCM/QR flyback controller with integrated
DCM/QR PFC controller
Rev. 2 — 16 November 2012
Product data sheet
1. General description
The TEA1752T is the third generation of green Switched Mode Power Supply (SMPS)
controller ICs. The TEA1752T 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
efficiency applies to quasi-resonant operation at high-power levels, quasi-resonant
operation with valley skipping, as well as reduced frequency operation at lower power
levels. At low-power levels, the PFC switches off to maintain high efficiency.
During low-power conditions, the flyback controller switches to frequency reduction mode
and limits the peak current to an adjustable minimum value. This mode ensures high
efficiency at low-power and good standby power performance while minimizing audible
noise from the transformer.
The TEA1752T is a Multi-Chip Module, (MCM), containing 2 chips. The proprietary
high-voltage BCD800 process which makes direct start-up possible from the rectified
universal mains voltage in an effective and green way. The second low voltage
Silicon On Insulator (SOI) is used for accurate, high speed protection functions and
control.
The TEA1752T enables the design of highly efficient and reliable supplies with power
requirements of up to 250 W with a minimum number of external components.
Remark:
All values provided throughout the running text, are typical values unless
otherwise stated.
NXP Semiconductors
TEA1752T
HV start-up flyback controller with integrated PFC controller
2. Features and benefits
2.1 Distinctive features
Integrated PFC and flyback controller
Universal mains supply operation (70 V AC to 276 V AC)
Dual boost PFC with accurate maximum output voltage (NXP patented)
High level of integration, resulting in a very low external component count and a
cost-effective design
Adjustable PFC switch-off delay
2.2 Green features
On-chip start-up current source
2.3 PFC green features
Valley/zero voltage switching for minimum switching losses (NXP patented)
Frequency limitation to reduce switching losses
PFC is switched off when a low load is detected at the flyback output
2.4 Flyback green features
Valley switching for minimum switching losses (NXP patented)
Frequency reduction with adjustable minimum peak current at low-power operation to
maintain high efficiency at low output power levels
2.5 Protection features
Safe restart mode for system fault conditions
Continuous mode protection with demagnetization detection for both converters (NXP
patented)
UnderVoltage Protection (UVP) (foldback during overload)
Accurate OverVoltage Protection (OVP) for both converters (adjustable for flyback
converter)
Mains voltage independent OverPower Protection (OPP)
Open control loop protection for both converters. The open-loop protection on the
flyback converter is a safe restart
OverTemperature Protection (OTP)
Low and adjustable OverCurrent Protection (OCP) trip level for both converters
General-purpose input for latched protection, for system OverTemperature Protection
(OTP) for example
3. Applications
The device is used in all applications that require an efficient and cost-effective power
supply solution for up to 250 W. Notebook adapters in particular can benefit from the
high level of integration
TEA1752T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 16 November 2012
2 of 33
NXP Semiconductors
TEA1752T
HV start-up flyback controller with integrated PFC controller
4. Ordering information
Table 1.
Ordering information
Package
Name
TEA1752T
SO16
Description
plastic small outline package; 16 leads; body width 3.9 mm
Version
SOT109-1
Type number
TEA1752T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 16 November 2012
3 of 33
NXP Semiconductors
TEA1752T
HV start-up flyback controller with integrated PFC controller
5. Block diagram
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Fig 1.
Block diagram
TEA1752T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 16 November 2012
4 of 33
NXP Semiconductors
TEA1752T
HV start-up flyback controller with integrated PFC controller
6. Pinning information
6.1 Pinning
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Fig 2.
Pin configuration: TEA1752T (SOT109-1)
6.2 Pin description
Table 2.
Symbol
V
CC
GND
FBCTRL
FBAUX
LATCH
PFCCOMP
VINSENSE
PFCAUX
VOSENSE
FBSENSE
PFCSENSE
PFCDRIVER
FBDRIVER
PFCTIMER
HVS
HV
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Description
supply voltage
ground
flyback control input
auxiliary winding input for demagnetization timing and flyback OVP
general-purpose protection input
frequency compensation pin for PFC
mains voltage sense input
auxiliary winding input for demagnetization timing for PFC
sense input for PFC output voltage
flyback current sense input
PFC current sense input
PFC gate-driver output
flyback gate-driver output
delay timer pin for PFC on/off control
high-voltage safety spacer, not connected
high-voltage start-up / flyback valley sensing
TEA1752T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 16 November 2012
5 of 33
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