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PDF TA1319AP Data sheet ( Hoja de datos )
| Número de pieza | TA1319AP | |
| Descripción | Switched Mode Power Supply (SMPS) Controller IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Toshiba Bipolar Linear IC - Silicon Monolithic
TA1319AP/AF
Switched Mode Power Supply (SMPS) Controller IC
TA1319AP/AF
TA1319AP
The TA1319AP/AF is a switched mode power supply (SMPS) controller IC that is
capable of switching from high frequency PWM (pulse width modulation) mode to
low frequency mode to reduce power consumption during standby. This IC can build
power supplies that contribute to power consumption savings for electronic
appliances that run at 50 W or lower during operation such as video cassette
records, DVD players, facsimile machines and printers.
DIP8-P-300-2.54A
TA1319AF
SOP8-P-225-1.27
Weight:
TA1319AP 0.5 (typ.)
TA1319AF 0.01 (typ.)
Features
Equipped with low frequency PWM mode and high frequency PWM mode for effectively reducing power consumption during
standby conditions.
The switch to standby mode is made when the FB voltage input to pin 4 (FB IN) exceeds the set voltage. The set voltage is
determined by pin 3 (STB).
OPP (Over Power Protection: Lowers the OCL threshold when the input AC voltage is high.)
UVLO (Under Voltage Lock Out),
OVLO (Over Voltage Lock Out) latch function equipped,
OCL (Over Current Limiter)
Wide AC range compatible (85 V to 264 V)
Drive frequency setting range: 25 kHz to 150 kHz
2003-04-07
1
Free Datasheet http://www.datasheet4u.com/
1 page  
TA1319AP/AF
Additional Explanation in Regard to the Mode Switching Control Function
The FB IN voltage increases as the load gets lighter. Taking advantage of this fact, the IC controls switch to standby mode when the
STB pin's voltage exceeds the set voltage.
← X axis : power →
0W
50 W
Low frequency mode
Continuous
25 kHz fixed
Continuous 25 kHz to
150 kHz external setting
The switching point can be adjusted at will using the external resistance of pin 3 (STB SET).
Low Frequency Continuous Mode Switching Control
Pulse duty
Maximum duty
Duty = 0%
FB voltage
Low frequency operation period
High frequency
operation
period
Low frequency operation period
It is possible to configure the
threshold using an external
constant.
High frequency
operation
period
2003-04-07
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
Pin Functionality
No. Name
Function
1 Vcc
The power supply pin for this IC.
This IC is equipped with UVLO (Under Voltage Lock
Out). When the Vcc voltage rises above 11.5 V (typ.)
the circuit starts operating, and when it drops below 9
V (typ.), it stops. (Please use caution as UVLO voltage
has temperature fluctuation.)
1
2 FREQ.
SET
The power voltage flow for Vcc is 13 to 22 V.
The IC startup current is 60 µA (typ.).
If the Vcc pin voltage goes above its maximum rated
voltage of 25 V (typ.), the latch up protector will
actuate and stop all operations other than the UVLO
circuit.
The pin used to set the oscillation frequency for the
internal oscillator circuit. Connects to and supplies
resistance (Rext) to GND. As that value changes, this
pin controls the oscillation frequency.
The relationship between the frequency and external
resistance is as follows:
ExtR = when 82 kΩ, about 50 kHz
when 20 kΩ, about 100 kHz
when 13 kΩ, about 150 kHz
2
3 STB
SET
The drive frequency setting range is 25 kHz to 150
kHz.
As the load lightens, the FB IN voltage increases. This
pin uses that phenomenon to switch to low frequency
continuous mode when the voltage goes higher than
the set threshold.
The mode transition voltage setting can be adjusted
by the external resistance applied to the STB SET pin.
3
TA1319AP/AF
Interface
8
1
8
1
8
2003-04-07
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet TA1319AP.PDF ] | |
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