TEA1521P-TEA1521T-TEA1522T Fast Delivery |IC PHOENIX CO.,LIMITED

TEA1521P ,SMPS ICs for low-power systemsGeneral descriptionThe TEA152x family STARplug is a Switched Mode Power Supply (SMPS) controller IC ..
TEA1521T ,STARplugFeatures and benefits Designed for general purpose supplies up to 30 W Integrated power switch: ..
TEA1522 ,STARplugAPPLICATIONS• Under voltage protectionTMTypical application areas for the STARplug are:• Temperatur ..
TEA1522AJM ,STARplugGENERAL DESCRIPTION• PC peripheralsThe TEA152x family is a Switched Mode Power• Microcontroller sup ..
TEA1522P ,SMPS ICs for low-power systemsFEATURES A dedicated circuit for valley switching is built in (notimplemented in TEA152xAJM version ..
TEA1522T ,STARplugAPPLICATIONS• Under voltage protectionTMTypical application areas for the STARplug are:• Temperatur ..
TL1431IDT ,PROGRAMMABLE VOLTAGE REFERENCETL1431PROGRAMMABLE VOLTAGE REFERENCE ■ ADJUSTABLE OUTPUT VOLTAGE : 2.5 to 36V■ SINK CURRENT CAP ..
TL1431IYDT ,Programmable Voltage ReferenceAbsolute maximum ratingsSymbol Parameter Value UnitV Cathode to anode voltage 37 VKAI Continuous ca ..
TL1431IZ ,PROGRAMMABLE VOLTAGE REFERENCETL1431PROGRAMMABLE VOLTAGE REFERENCE ■ ADJUSTABLE OUTPUT VOLTAGE : 2.5 to 36V■ SINK CURRENT CAP ..
TL1431M ,Precision Adjustable (Programmable) Shunt ReferenceBlock Diagram... 12Information..... 218.3 Feature Description ... 134 Revision HistoryChanges from ..
TL1431MJG ,Precision Adjustable (Programmable) Shunt ReferenceFeatures 3 DescriptionThe TL1431 device is a precision programmable1• 0.4% Initial Voltage Toleranc ..
TL1431QDRG4Q1 ,Automotive Catalog Precision Adjustable (Programmable) Shunt Reference 8-SOIC -40 to 125

TEA1521P-TEA1521T-TEA1522T
SMPS ICs for low-power systems
1. General description
The TEA152x family STARplug is a Switched Mode Power Supply (SMPS) controller IC
that operates directly from the rectified universal mains. It is implemented in the
high-voltage EZ-HV SOI process, combined with a low-voltage Bipolar Complementary
Metal-Oxide Semiconductor (BiCMOS) process. The device includes a high-voltage
power switch and a circuit for start-up directly from the rectified mains voltage.
A dedicated circuit for valley switching is built in, which makes a very efficient slim-line
electronic power-plug concept possible.
In its most basic version of application, the TEA152x family acts as a voltage source.
Here, no additional secondary electronics are required. A combined voltage and current
source can be realized with minimum costs for external components. Implementation of
the TEA152x family renders an efficient and low cost power supply system.
2. Features and benefits Designed for general purpose supplies up to 30W Integrated power switch: TEA1520x: 48 Ω; 650V TEA1521x: 24 Ω; 650V TEA1522x: 12 Ω; 650V TEA1523P: 6.5 Ω; 650V Operates from universal AC mains supplies (80 V to 276V) Adjustable frequency for flexible design RC oscillator for load insensitive regulation loop constant Valley switching for minimum switch-on loss Frequency reduction at low power output makes low standby power possible 100 mW) Adjustable overcurrent protection Undervoltage protection Temperature protection Short-circuit winding protection Simple application with both primary and secondary (opto) feedback Available in DIP8 and SO14 packages
TEA152x
SMPS ICs for low-power systems
Rev. 04 — 14 September 2010 Product data sheet
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
3. Applications Chargers Adapters Set-Top Box (STB) DVD CD(R) TV/monitor standby supplies PC peripherals Microcontroller supplies in home applications and small portable equipment, etc.
4. Quick reference data Table 1. Quick reference data
Vdrain voltage on pin DRAIN Tj >0°C −0.4 - +650 V
RDSon drain-source on-state
resistance
TEA1520x Isource= −0.06A =25°C - 48 55.2 Ω= 100°C - 68 78.2 Ω
TEA1521x Isource= −0.125A =25°C - 24 27.6 Ω= 100°C - 34 39.1 Ω
TEA1522x Isource= −0.25A =25°C - 12 13.8 Ω= 100°C - 17 19.6 Ω
TEA1523P Isource= −0.50A =25 °C- 6.5 7.5 Ω= 100°C - 9.0 10.0 Ω
VCC supply voltage continuous −0.4 - +40 V
fosc oscillator frequency 10 100 200 kHz
Idrain current on pin DRAIN Vdrain >60V; auxiliary supply
-1.5 2 mA
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
5. Ordering information
6. Block diagram
Table 2. Ordering information
TEA1520P DIP8 plastic dual in-line package; 8 leads (300 mil) SOT97-1
TEA1521P DIP8 plastic dual in-line package; 8 leads (300 mil) SOT97-1
TEA1522P DIP8 plastic dual in-line package; 8 leads (300 mil) SOT97-1
TEA1523P DIP8 plastic dual in-line package; 8 leads (300 mil) SOT97-1
TEA1520T SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
TEA1521T SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
TEA1522T SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
7. Pinning information
7.1 Pinning
7.2 Pin description
8. Functional description
The TEA152x family is the heart of a compact flyback converter, with the IC placed at the
primary side. The auxiliary winding of the transformer can be used for indirect feedback to
control the isolated output. This additional winding also powers the IC. A more accurate
control of the output voltage and/or current can be implemented with an additional
secondary sensing circuit and optocoupler feedback.
The TEA152x family uses voltage mode control. The frequency is determined by the
maximum transformer demagnetizing time and the time of the oscillator. In the first case,
the converter operates in the Self-Oscillating Power Supply (SOPS) mode. In the latter
case, it operates at a constant frequency, which can be adjusted with external
Table 3. Pin description
VCC 1 1 supply voltage
GND 2 2, 3, 4,
5, 9, 10
ground 36frequency setting
REG 4 7 regulation input
AUX 5 8 input for voltage from the auxiliary winding for timing
(demagnetization)
SOURCE 6 11 source of the internal MOS switch
n.c. 7 12, 13 not connected
DRAIN 8 14 drain of the internal MOS switch; input for the start-up current
and valley sensing
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
components RRC and CRC. This mode is called Pulse Width Modulation (PWM).
Furthermore, a primary stroke is started only in a valley of the secondary ringing. This
valley switching principle minimizes capacitive switch-on losses.
8.1 Start-up and Underoltage lockout
Initially, the IC is self supplying from the rectified mains voltage. The IC starts switching as
soon as the voltage on pin VCC passes the VCC(startup) level. The supply is taken over by
the auxiliary winding of the transformer as soon as VCC is high enough and the supply
from the line is stopped for high efficiency operation.
When for some reason the auxiliary supply is not sufficient, the high-voltage supply also
supplies the IC. As soon as the voltage on pin VCC drops below the VCC(stop) level, the IC
stops switching and restarts from the rectified mains voltage.
8.2 Oscillator
The frequency of the oscillator is set by the external resistor and capacitor on pin RC. The
external capacitor is charged rapidly to the VRC(max) level and, starting from a new primary
stroke, it discharges to the VRC(min) level. Because the discharge is exponential, the
relative sensitivity of the duty factor to the regulation voltage at low duty factor is almost
equal to the sensitivity at high duty factors. This results in a more constant gain over the
duty factor range compared to PWM systems with a linear sawtooth oscillator. Stable
operation at low duty factors is easily realized. For high efficiency, the frequency is
reduced as soon as the duty factor drops below a certain value. This is accomplished by
increasing the oscillator charge time.
To ensure that the capacitor can be charged within the charge time, the value of the
oscillator capacitor should be limited to approximately 1 nF.
8.3 Duty factor control
The duty factor is controlled by the internal regulation voltage and the oscillator signal on
pin RC. The internal regulation voltage is equal to the external regulation voltage (−2.5 V)
multiplied by the gain of the error amplifier (typically 20 dB which is 10×).
8.4 Valley switching
A new cycle is started when the primary switch is switched on (see Figure 4). After a
certain time (determined by the oscillator voltage RC and the internal regulation level), the
switch is turned off and the secondary stroke starts. The internal regulation level is
determined by the voltage on pin REG.
After the secondary stroke, the drain voltage shows an oscillation with a frequency of
approximately:
(1)
where:
Lp = primary self-inductance
Cp = parasitic capacitance on drain node π××----------------------------
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
As soon as the oscillator voltage is high again and the secondary stroke has ended, the
circuit waits for a low drain voltage before starting a new primary stroke.
Figure 4 shows the drain voltage together with the valley signal, the signal indicating the
secondary stroke and the RC voltage.
The primary stroke starts some time before the actual valley at low ringing frequencies,
and some time after the actual valley at high ringing frequencies.
Figure 5 shows a typical curve for a reflected output voltage N× Vo of 80 V. This voltage is
the output voltage Vo (see Figure 6) transferred to the primary side of the transformer with
the factor N (determined by the turns ratio of the transformer). Figure 5 shows that the
system switches exactly at minimum drain voltage for ringing frequencies of 480 kHz, thus
reducing the switch-on losses to a minimum. At 200 kHz, the next primary stroke is started
at 33° before the valley. The switch-on losses are still reduced significantly.
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
8.5 Demagnetization
The system operates in discontinuous conduction mode all the time. As long as the
secondary stroke has not ended, the oscillator will not start a new primary stroke. During
the first tsuppr seconds, demagnetization recognition is suppressed. This suppression may
be necessary in applications where the transformer has a large leakage inductance and at
low output voltages.
8.6 Minimum and maximum duty factor
The minimum duty factor of the switched mode power supply is 0 %. The maximum duty
factor is set to 75 % (typical value at 100 kHz oscillation frequency).
8.7 OverCurrent Protection (OCP)
The cycle-by-cycle peak drain current limit circuit uses the external source resistor RI to
measure the current. The circuit is activated after the leading edge blanking time tleb. The
protection circuit limits the source voltage to Vsource(max), and thus limits the primary peak
current.
8.8 Short-circuit winding protection
The short-circuit winding protection circuit is also activated after the leading edge blanking
time. If the source voltage exceeds the short-circuit winding protection voltage Vswp, the IC
stops switching. Only a power-on reset will restart normal operation. The short-circuit
winding protection also protects in case of a secondary diode short circuit.
8.9 OverTemperature Protection (OTP)
An accurate temperature protection is provided in the device. When the junction
temperature exceeds the thermal shutdown temperature, the IC stops switching. During
thermal protection, the IC current is lowered to the start-up current. The IC continues
normal operation as soon as the overtemperature situation has disappeared.
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
8.10 OverVoltage Protection (OVP)
Overvoltage protection can be achieved in the application by pulling pin REG above its
normal operation level. The current primary stroke is terminated immediately, and no new
primary stroke is started until the voltage on pin REG drops to its normal operation level.
Pin REG has an internal clamp. The current feed into this pin must be limited.
8.11 Output characteristics of complete power-plug
Typical characteristics: Output power: A wide range of output power levels can be handled by choosing the
RDS(on) and package of the TEA152x family. Power levels up to 30 W can be realized. Accuracy: The accuracy of the complete converter, functioning as a voltage source
with primary sensing, is approximately 8 % (mainly dependent on the transformer
coupling). The accuracy with secondary sensing is defined by the accuracy of the
external components. For safety requirements in case of optocoupler feedback loss,
the primary sensing remains active when an overvoltage circuit is connected. Efficiency: An efficiency of 75 % at maximum output power can be achieved for a
complete converter designed for universal mains. Ripple: A minimum ripple is obtained in a system designed for a maximum duty factor
of 50 % under normal operating conditions, and a minimized dead time. The
magnitude of the ripple in the output voltage is determined by the frequency and duty
factor of the converter, the output current level and the value and ESR of the output
capacitor.
8.12 Input characteristics of complete power-plug
Typical characteristics: The input voltage range comprises the universal AC mains (80 V to 276V)
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
9. Limiting values
[1] Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor. All pins
are 2500 V maximum, except pin DRAIN, which is 1000 V maximum.
[2] Machine model: equivalent to discharging a 200 pF capacitor through a 0.75 μH coil and a 10 Ω series
resistor.
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are measured
with respect to ground; positive currents flow into the device; pins VCC and RC are not allowed to be
current driven and pins REG and AUX are not allowed to be voltage driven.
Voltages
VCC supply voltage continuous −0.4 +40 V
VRC voltage on pin RC −0.4 +3 V
Vsource voltage on pin SOURCE DMOS power
transistor −0.4 +5 V
Vdrain voltage on pin DRAIN Tj >0°C −0.4 +650 V
Currents
IREG current on pin REG - 6 mA
IAUX current on pin AUX −10 +5 mA
Isource source current
TEA1520x −0.25 +0.25 A
TEA1521x −0.5 +0.5 A
TEA1522x −1+1 A
TEA1523P −2+2 A
Idrain drain current
TEA1520x −0.25 +0.25 A
TEA1521x −0.5 +0.5 A
TEA1522x −1+1 A
TEA1523P −2+2 A
General
Ptot total power dissipation
DIP8 package Tamb <45 °C- 1.0 W
SO14 package Tamb <50 °C- 1.0 W
Tstg storage temperature −55 +150 °C junction temperature −40 +145 °C
Vesd electrostatic discharge voltage human body model [1]- ±2500 V
machine model [2]- ±200 V
NXP Semiconductors TEA152x
SMPS ICs for low-power systems
10. Thermal characteristics
[1] Thermal resistance Rth(j-a) can be lower when the GND pins are connected to sufficient copper area on the
printed-circuit board. See the TEA152x application note for details.
11. Characteristics
Table 5. Thermal characteristics
Rth(j-a) thermal resistance from junction to ambient in free air [1]
DIP8 package 100 K/W
SO14 package 91 K/W
Table 6. Characteristics
Tamb =25 °C; no overtemperature; all voltages are measured with respect to ground; currents are
positive when flowing into the IC; unless otherwise specified.
Supply
ICC(oper) operating supply current normal operation - 1.3 1.9 mA
ICC(startup) start-up supply current start-up - 180 400 μA
ICC(ch) charge supply current Vdrain >60V −6 −4 −3mA
VCC(startup) start-up supply voltage 9 9.5 10 V
VCC(stop) stop supply voltage undervoltage lockout 7.0 7.5 8.0 V
Idrain current on pin DRAIN Vdrain >60V
no auxiliary supply - 1.5 2 mA
with auxiliary
supply 30 125 μA
Pulse-width modulator
δmin minimum duty factor - 0 - %
δmax maximum duty cycle f= 100 kHz - 75 - %
SOPS
Vdet(demag) demagnetization detection
voltage 100 150 mV
tsup(xfmr_ring) transformer ringing
suppression time
start of 2nd stroke 1.0 1.5 2.0 μs
RC oscillator
VRC(min) minimum voltage on pin RC 60 75 90 mV
VRC(max) maximum voltage on pin RC 2.4 2.5 2.6 V
tch(RC) charge time on pin RC - 1 - μs
fosc oscillator frequency 10 100 200 kHz
Duty factor regulator: pin REG
VREG voltage on pin REG 2.4 2.5 2.6 V voltage gain error amplifier - 20 - dB
Vclamp(REG) clamp voltage on pin REG IREG=6 mA --7.5 V

Partno	Mfg	Dc	Qty	Available	Descript
TEA1521P	NXP	N/a	29500	avai	SMPS ICs for low-power systems
TEA1521T	NXP	N/a	664	avai	STARplug
TEA1522T	NXP	N/a	630	avai	STARplug