TDA4605-2 Infineon Technologies, TDA4605-2 Datasheet - Page 5

• Manufacturer Part Number: TDA4605-2
• Description: IC POWER SUPPLY CONTROLLER 8DIP
• Manufacturer: Infineon Technologies

Specifications of TDA4605-2

• Applications: Power Supply Controller
• Voltage - Supply: 7.5 V ~ 15.5 V
• Current - Supply: 11mA
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SP000011728; TDA46052X; TDA46052XK

Pin Definitions and Functions
Pin No.
1
2
3
4
5
6
7
8
Version 2.0
Function
Information Input Concerning Secondary Voltage. By comparing the
regulating voltage - obtained from the regulating winding of the transformer - with
the internal reference voltage, the output impulse width on pin 5 is adjusted to the
load of the secondary side (normal load, overload, short-circuit, no load).
Information Input Regarding the Primary Current. The primary current rise in
the primary winding is simulated at pin 2 as a voltage rise by means of external
RC-circuit. If a voltage level is reached which is derived from the control voltage
at pin 1, the output impulse at pin 5 is terminated. The RC-circuit is used to set
the maximum power of the foldback point.
Input for Primary Voltage Monitoring: In the normal operation
between the thresholds
V
V
starts at
Ground
Output: Push-pull output for charging or discharging the gate capacity of the
power MOSFET-transistor.
Supply Voltage Input. From the voltage at pin 6 a stable internal reference
voltage
supply voltage detector are derived. If
reference voltage will be switched off if
enable, for
Input for Soft-Start and Integrator Circuit. The capacitor connected to ground
causes a slow increase of the duration of the output pulse during start-up and an
integrating response of the control amplifier.
Input for the Feedback of the Oscillator. After the oscillations of the SMPS
started, every transition of the feedback voltage through zero (falling edge)
triggers an output pulse at pin 5. The trigger threshold is at + 50 mV typical.
3
3
<
>
V
V
3L
3H
V
: SMPS is switched OFF (line voltage too low).
V
REF
: Compensation of the overload point regulation (controlled by pin 2)
3H
V
6 min
:
V
and the switching thresholds
3L
<
= 1.7.
V
6
<
V
V
3H
6 max
5
and
.
V
3L
(V
V
3H
6
V
>
>
6
V
<
V
V
6A
6E
3
V
>
6A
,
then
V
V
. In addition the logic is only
6E
3L
).
,
V
V
REF
6 max
is switched on. The
and
TDA 4605-2
V
V
6 min
3
is moving
1 Jul 2002
for the