TEA2164 Fast Delivery |IC PHOENIX CO.,LIMITED

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TEA2164
SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT
TEA2164
SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT
GROUND
ICOPY
LONG CAPACITOROVERLOADCAPACITOR
SUBSTRATE
PULSEINPUT
OSCILLATOR TIMING RESISTOR
OSCILLATORTIMING CAPACITOR
SUBSTRATE SUPPLY VOLTAGE
OUTPUT STAGE POSITIVE SUPPLY VOLTAGE
OUTPUT (BASE CURRENT)
SUBSTRATE SENSE
LOW FREQUENCY OSCILLATOR CAPACITOR
FEEDBACK INPUT ISBURST MODE
SUBSTRATE (max.)
PIN CONNECTIONS
POWERDIP16
(Plastic Package)
ORDER CODE: TEA2164
.POSITIVE AND NEGATIVE OUTPUT CUR-
RENT UP TO 1.2A AND– 1.7A.A TWO LEVEL COLLECTOR CURRENT LIMI-
TATION .COMPLETE TURN OFF AFTER LONG DURA-
TIONOVERLOADS.UNDER AND OVER VOLTAGE LOCK-OUT.SOFT START BY PROGRESSIVE CURRENT
LIMITATION.DOUBLE PULSE SUPPRESSION.BURST MODE OPERATION UNDER STAND- CONDITIONS
DESCRIPTION amasterslave architecture,theTEA2164control achieves the slave function. Primarily designed
for TV receivers and monitors applications, this
circuit providesan easy synchronization and smart
solutionfor low power standby operation.
Locatedat the primary side the TEA2164 Control ensures: the power supply start-up the power supply control under stand-by condi-
tions the processof the regulation signals sentby the
master circuit locatedat the secondary side directbasedrive ofthe bipolarswitchingtransistor the protectionof the transistor and the power
supply under abnormal conditions.
For more details, referto application note AN409.
BLOCK DIAGRAM
TEA2164
2164-03.EPS
Figure1: SimplifiedApplication Diagram
MAXIMUM POWER DISSIPA TION
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Positive Power Supply V16-V1 18 V Positive Power Supplyofthe Output Stage V15-V1 18 V Negative Power Supply V4,5, 12, 13-V1 –5 V
VCC -V– -V–
Total Power Supply V16-V4,5, 12, 13or V15-V4,5, 12,13 20 V
Iout+ Positive Output Current 1.5 A
Iout– Negative Output Current 2 A Operating Junction Temperature 150 °C
Tstag Storage Temperature Range – 40,+ 150 °C
2164-01.TBL
THERMAL DATA
Symbol Parameter Value Unit
Rth(j-c) Junction Case Thermal Resistance 11 °C/W
2164-02.TBL
TEA2164
RECOMMANDED OPERATING CONDITIONS
Symbol Parameter Min. Typ. Max. Unit
VCC Positive Power Supply 10 14 V
V– Negative Power Supply (absolute value) (note1) 0 5 V
VCC–V– Total Power Supply 18 V
Iout+ Positive Output Current 1.2 A
Iout– Negative Output Current 1.7 A
Fsw Switching Frequency 50 khz Oscillator Resistor Range 30 150 kΩ Oscillator Capacitor Range 470 2700 pF Starting Oscillator Capacitor Range 0.1 4.7 μF Repetitive Overload Protection Capacitor 1 22 μF
Vin Input Pulses Amplitude (peak) (derivated pulses- time constant =1 μs) 0.5 1 V
Toper Operating Ambiant Temperature –20 70 °C
2164-03.TBL 13 1TEA2164 TEA216412CCVBII>0BI
capacitive
couplingBIVI
2164-05.EPS
ELECTRICAL OPERATING CHARACTERISTICS
Tamb =25oC, VCC= 10V, VCC-= 0V, potentials referencedto ground (Pin1)
(unlessotherwise specified)
Symbol Parameter Min. Typ. Max. Unit
POWER SUPPLY
VCC (start) Starting Voltage (VCC increasing) 8 9 9.6 V
VCC (stop) Stopping Voltage (VCC decreasing) 5 6.2 7.4 V
ΔVCC Hysteresis (VCC start– VCC stop) 2 2.8 3.5 V
Vccmax Overvoltage Lock-out 14.8 15.5 16.2 V
Iccstart Starting Positive Supply Current 0.5 0.8 1.5 mA
CURRENT LIMITATION AND PROTECTION (pin 11)
VCM1 Pulseby Pulse Current Limitation Threshold 720 840 970 mV
VCM2 Current Monitoring 2nd Threshold 1200 1350 1500 mV
ΔVCM ΔVCM= VCM2– VCM1 300 500 700 mV
REPETITIVE OVERCURRENT PROTECTION
VCM3 Repetitive Overcurrent Threshold (pin 11) 700 900 1100 mV
VCM3-VCM1 (VCM3-VCM1) –20 50 130 mV
VC2 Lock-out Voltageon Pin3 2.4 3 3.6 V disch CapacitorC2 Discharge Current (synchronized mode) 10 20 30 μAch. CapacitorC2 Charge Current 50 80 110 μA
OSCILLATOR, MAX DUTY CYCLE, SYNCHRONIZATION
TEA2164
ELECTRICAL OPERATING CHARACTERISTICS (continued)
Symbol Parameter Min. Typ. Max. Unit
OSCILLATOR, MAX DUTY CYCLE, SYNCHRONIZATION (continued)
Tsyn Synchronization Window 1.0 1.5
OUTPUT STAGE
I14/I2 Ic Copy Current Gain 1000
IBON Base Current Starting Pulse 300 mA
VERY LOW FREQUENCY OSCILLATOR
Burst Duty Cycle 13 %
2164-05.TBL FIELD OF APPLICATION
The TEA2164 control circuit has been designed
primarilyfor discontinuous mode flyback built with master-slave architecture, whatever the fieldof
application.
But duetoits capabilityto synchronize the transis-
tor switching-off with an external signal (line fly-
back)and duetoan adaptedburst-mode operation
fora low power stand-by operation, the TEA2164
offersa smart solution for monitors and TV sets
applications.
Power supply main features: maximum output power 140W (transistor forced
gain: 3.5) stand-bymode outputpower (1W≤ Psb≤ 6W;
efficiency> 50%) operating frequencyupto 50kHz power-switch: bipolar transistor
Adapted master-circuit:
Monitor application → TEA5170
Standard TV application → TEA2028B
TEA2029C
TEA2128
TEA5170
Digital TV application → TEA5170
(TEA2028B, TEA2029C and TEA2128 are deflec-
tion processors with built-in PWM generator).
AUDIO
OUTPUT
STAGE
SCANNING
DEVICE
TEA5170
MAINS
INPUT
VOLTAGE
REGULATOR
INFRA-RED
RECEIVER
Muting
Control
Remote
Stand-by
Remote
Stand-by
Synchronization
VCCP
VCCP :Outputvoltageadjustementinnormal mode
Power primaryground
PWM
TEA2164
Small signalprimary ground
Figure2: Master Slave Power Supply Architecture
TEA2164
Figure3: System Description Waveforms
II. GENERAL DESCRIPTIONa master slave architecture,the TEA2164 Con-
trol IC, locatedat the primary sideof an off line
powersupply achievesthe slave function; whereas
the master circuitis locatedat the secondary side.
The link between both circuitsis realizedbya small
pulse transformer (Figure3).
TEA2164
the operationof the master-slave architecture,four majors cases mustbe considered: normal operating stand-by mode power supply start-up abnormal conditions:off load, short circuit,...
II.1. Normal Operating (master slave mode) this configuration, the master circuit generatesa
pulse width modulatedsignal issuedfrom themoni-
toringof the output voltage which needs the best
accuracy(in TV applications: the horizontaldeflec-
tion stagesupplyvoltage). Themastercircuit power
supply canbe suppliedby another output.
The PWM signal are sent towards theprimary side
through small differentiating transformer. For the
TEA2164 positive pulses are transistor switching- commands; andnegative pulses are transistor
switching-offcommands (Figure4).In this configu-
ration, onlyby synchronizing the master oscillator,
the switching transistor maybe synchronized with external signal.
II.2. Stand-by Mode this configuration the master circuit no longer
sends PWM signals, the structureis not synchro-
nized; and the TEA2164operatesin burst mode.
The average power consumptionat the secondary
side may be very low 1W ≤P≤ 6W (asitis
consumedin TV set during stand by). action on the maximum duty cycle control,a
primary loop maintainsa semi-regulationof the
outputvoltages.Voltageon feed-backis appliedon
Pin9.
Burstperiodis externallyprogrammedby capacitor
C1.
II.3. Power Supply Start-up
After the mains have been switched-on, the VCC
storage capacitorof the TEA2164is charged
througha high value resistor connectedto the
rectified high voltage. When Vcc reaches VCC start
threshold(9V typ), the TEA2164 starts operatingin
burst mode. Since available output poweris lowin
burst mode the output power consumption must
remain low before complete setting-upof output
voltage.In TV applicationit can be achievedby
maintaining the TVin stand-by mode during start- (Figure6).
SLAVE
CIRCUIT
MASTER
CIRCUIT
Sync.
Pulses
Pulse
Input
Base
Current
PWM
Signal
Synchro.
2164-08.EPS
Figure4: Master Slave Mode Waveforms
TEA2164
2164-09.EPS
Figure5: Burst Mode Waveforms
2164-10.EPS
Tch≈1s (typ)≈ 0.3s (typ)
Tstart-up =Tch+T1 T1 :necessary timefor voltagesetting-up
Figure6: Power Supply Start-up Abnormal conditions: safety functions
Overvoltage Protection
When VCC exceeds VCC max,an internal flip-flop
stops output conduction signals. The circuit will
start again after the capacitor C1 discharge;it
means: after lossof synchronizationor after Vcc
stop crossing (Figure7). flyback converters, this function protects the
power supply against output voltagerunaway.
Under Voltage Lock-out
Power Limitation, Current Protection, Long
Duration Overload Protection Output power limitation: bya pulse by pulse
collector current limitation the TEA2164 limits the
maximum output power. VCM1is the correspond-
ing voltage threshold,its detectionis memorizedto the next period. Current protection (transistor protection)
Under particular conditionsa hard overloador
short circuit may inducea flux runawayin spiteof
the current limitation (VCM1).
The TEA2164 control circuit featuresa second
TEA2164

Partno	Mfg	Dc	Qty	Available	Descript
TEA2164	ST	N/a	100	avai	SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT