tea1541 NXP Semiconductors, tea1541 Datasheet - Page 15

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

Philips Semiconductors
11 APPLICATION INFORMATION
A typical flyback converter that uses the TEA1541 consists
of an input filter, a transformer with a third (auxiliary)
winding, and an output stage with a feedback circuit.
Capacitor C
voltage from the rectified high voltage (AC) mains during
start-up, or from the auxiliary winding during operation.
Resistor R
at pin I
primary peak current. Resistor R
enable soft start and burst standby mode operation.
2003 Aug 11
handbook, full pagewidth
SMPS control IC with
synchronization function
sense
Sync
sense
. The resistor value defines the maximum
VCC
converts the primary current into a voltage
connected to pin V
R SYNC
C SYNC
R REG
C VCC
C REG
MDB081
Fig.8 Flyback configuration with synchronization and soft start.
CTRL
GND
DEM
V CC
V mains
SS
CC
and capacitor C
1
2
3
4
buffers the IC supply
TEA1541P
SS
8
7
6
5
C VIN
VIN
HV
DRIVER
I sense
15
R SNUB
D SNUB
A resistor and a series diode can be placed in parallel with
resistor R
and out of the IC, allowing the values of the OVP level and
primary current simulation to be defined independently.
More details are available in Application note AN10205 .
R DEM
D VCC
R SS
C SS
DEM
C SNUB
power
MOSFET
to control the amount of current flowing into,
R sense
OPTO
D OUT
C OUT
R REG1
R REG2
OUTPUT
Product specification
TEA1541