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PDF TDA16850-2 Data sheet ( Hoja de datos )
| Número de pieza | TDA16850-2 | |
| Descripción | Free running and synchronized SMPS Controller | |
| Fabricantes | Infineon Technologies Corporation | |
| Logotipo |  |
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www.DataSheet.co.kr
Data Sheet, April 2001
TDA 16850-2
Free running and synchronized
SMPS Controller
Power Management & Supply
Never stop thinking.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
TDA 16850-2
Synchronized SMPS Controller
1 Overview
1.1 Features
– Controller for Flyback Topology
– Current mode PWM with shunt resistor and spike
blanking
– Leading edge triggered pulse width modulation
– Fast, soft switching totem pole gate drive (1 A)
– Soft start management for safe start up
1.2 Special Features
– Typical 100 µA start-up supply current
– Low quiescent current (5 mA)
– Maximum output power independent of frequency
– 20 kHz internal oscillator for start-up and standby
mode
– 60 kHz internal oscillator for non synchronized
normal mode
– Synchronization range 30 kHz to 130 kHz
– Feedback via optocoupler in normal operation
– Feedback via transformer winding in standby mode
– Standby mode with reduced output voltages by
factor of 5
– Off mode with power consumption less then 1 W
– Mode switching and voltage feedback through only
one optocoupler
– Different failure modes recognition with latch
function
1.4 General Remarks
The TDA 16850-2 comprises the complete control for
flyback switched mode power supplies especially in
CRT monitors. It also performs all necessary protection
functions in flyback converters. The TDA 16850-2
applies to converters with input line voltages ranging
from 90 VAC to 270 VAC .
The maximum duty cycle depends on frequency, line
voltage and soft start management. The maximum
output power therefore will be limited effectively in case
of a secondary overload.
All clock signals as well as the PWM voltage ramp are
either synchronized by the internal oscillator or by the
synchronisation signal at pin SYNC. The internal
oscillator is activated if there is no signal at SYNC. An
horizontal deflection signal at pin SYNC synchronizes
the internal oscillator automatically.
Mode switching is done via the input current at pin
OPTO. In the standby mode the TDA 16850-2 gets its
supply from pin VREG. The voltage at VREG is then
also the feedback voltage. The TDA 16850-2 will switch
off the power supply and enter the off mode when the
optocoupler current is completely turned off.
It can restart from a short optocoupler current pulse,
which can be derived from a vertical synchronization
pulse. The TDA 16850-2 operates in the normal mode if
VVCC and IOPTO are in their nominal range.
1.3 Protection Features
– Fast and slow peak current limitation
– Mains undervoltage protection
– IC Supply Overvoltage
– IC Supply Undervoltage
– Loop Failure
– Over temperature switch off
– Over current protection
– Short circuit protection
As far as patents or other rights of third parties are concerned, liability is only assumed for components, not for
applications, processes and circuits implemented within components or assemblies.
The information describes the type of component and shall not be considered as assured characteristics.
Type
TDA16850-2
Data Sheet
Ordering Code
Q67040-S4404-A
5
Package
P-DIP-8
04.01
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
3 Functional Block Description
TDA16850-2
SYNC 4
Z2
7,5 V
10 µA
CS 3
Comp 1
Oscillator
20 kHz & 60 kHz
1V
7,5 V
Comp 12
3.5 V
Comp 2
1.5 V
Powerlimit
USST
20 µA
fClock
Comp 3
1.2 V
T1
7,5 V
2 µA
Comp 4
FF 2
S
1Q
R
Comp 5
&
Comp 6
OP 1
R4 10k
R5 37k
2V
R6 60k
Comp 12
C3
0.5pF
T2
C2 5pF
OPTO 8
VREG 2
VCC 7
T3
R3 750
C1 5pF
R7 40k R8 35k
7,5 V
R2 200k
OP 3
VPWM
2 V OP 2
11 V
OTA 1
I
R9
D1
OP 4
T4
11 V
Comp 9
Comp 10
2.6 V
&
3V
Comp 8
8V
1
Z 1 Comp 7
Voltage Reference
Power Management
Starting-up Hyst.
7.5 V - 23 V
1V
R1
Overtemp. detect.
UT
Temp
Comp 11
2.11 V
T7
Delay
70µs
FF 1
S
Q
R
VCC
T5
&
6 GATE
T6
Figure 3 Block Diagram
1
SST
5
GND
Data Sheet
11
04.01
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet TDA16850-2.PDF ] | |
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