TEA1532AP/N1,112 NXP Semiconductors, TEA1532AP/N1,112 Datasheet - Page 7

IC PFC CONTROLLER CCM 8DIP

TEA1532AP/N1,112

Manufacturer Part Number
TEA1532AP/N1,112
Description
IC PFC CONTROLLER CCM 8DIP
Manufacturer
NXP Semiconductors
Series
GreenChip™ IIr
Datasheet

Specifications of TEA1532AP/N1,112

Mode
Continuous Conduction (CCM)
Frequency - Switching
63kHz
Current - Startup
1.2mA
Voltage - Supply
11 V ~ 20 V
Operating Temperature
-25°C ~ 70°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
568-3314-5
935278106112
TEA1532APN
Philips Semiconductors
9397 750 14319
Product data sheet
7.10 Adjustable slope compensation
7.4 Oscillator
7.5 Cycle skipping
7.6 Demagnetization (QR operation)
7.7 Continuous Conduction Mode (CCM)
7.8 OverCurrent Protection (OCP)
7.9 Control pin protection
The fixed frequency of the oscillator is set by an internal current source and capacitor.
At very low power levels, a cycle skipping mode activates. An internal control voltage
(V
this voltage increases to a higher value; see
The system will be in Discontinuous Conduction Mode (DCM) (QR operation) when
resistor R
secondary stroke has ended.
Demagnetization features a cycle-by-cycle output short-circuit protection which
immediately reduces the frequency (longer off-time), thereby reducing the power level.
Demagnetization recognition is suppressed during the first t
suppression may be necessary in applications where the transformer has a large leakage
inductance and at low output voltages or start-up.
It is also possible to operate the IC in the so-called Fixed Frequency Continuous
Conduction Mode (FF CCM). This mode is activated by connecting pin DEM to ground
and connecting pin DRAIN to the rectified V
The primary current in the transformer is measured accurately by the internal
cycle-by-cycle source current limit circuit using the external sense resistor R
The accuracy of the current limit circuit allows the transformer core to have a minimum
specification for the output power required. The OCP circuit limits the ‘sense’ voltage to an
internal level (the primary peak current in the transformer is also limited). The OCP
detection is suppressed during the leading edge blanking period, t
Leading Edge Blanking (LEB) circuit, to prevent false triggering caused by the switch-on
spikes.
If pin CTRL becomes open-circuit or is disconnected, a fault condition is assumed and the
converter will stop switching immediately. Operation recommences when the fault
condition is removed.
A slope compensation function has been added at pin CTRL; see
compensation function prevents sub-harmonic oscillation in CCM at duty cycles over
50 %. The CTRL voltage is modulated by sourcing a (non-constant) current out of
pin CTRL and by adding externally a series resistor R
voltage proportionally with the on-time, which therefore limits the OCP level. A longer
on-time results in a higher CTRL voltage, this increase in CTRL voltage will decrease the
sense(max)
DEM
) lower than 25 mV will inhibit switch-on of the external power MOSFET until
is applied. The oscillator will not start a new primary stroke until the previous
Rev. 02 — 4 February 2005
TEA1532(A)P; TEA1532(A)T
i
Figure
voltage; see
6.
slopecomp
GreenChip II SMPS control IC
Figure
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
supp
. This increases the CTRL
time (typical 1.5 s). This
13.
leb
Figure
generated by the
7. The slope
sense
.
7 of 27

Related parts for TEA1532AP/N1,112