TDA4605 STMicroelectronics, TDA4605 Datasheet - Page 2
![IC POWER SUPPLY CONTROLLER 8DIP](/photos/1/39/13944/497-8-dip_sml.jpg)
TDA4605
Manufacturer Part Number
TDA4605
Description
IC POWER SUPPLY CONTROLLER 8DIP
Manufacturer
STMicroelectronics
Datasheet
1.TDA4605.pdf
(7 pages)
Specifications of TDA4605
Applications
Power Supply Controller
Operating Temperature
-20°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Supply
-
Voltage - Supply
-
Voltage - Input
-
Other names
Q1660517
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TDA4605
Manufacturer:
SIEMENS
Quantity:
5 870
Company:
Part Number:
TDA4605
Manufacturer:
microsemi
Quantity:
5 883
Part Number:
TDA4605
Manufacturer:
INFINEON/英飞凌
Quantity:
20 000
Company:
Part Number:
TDA4605-15
Manufacturer:
SIEMENS
Quantity:
1 830
Company:
Part Number:
TDA4605-15
Manufacturer:
LT
Quantity:
1 831
Part Number:
TDA4605-15
Manufacturer:
INFINEON/英飞凌
Quantity:
20 000
Company:
Part Number:
TDA4605-2
Manufacturer:
SIEMENS
Quantity:
4 472
TDA4605
PIN CONFIGURATION
Figure 2. Block Diagram
2/7
1
Number
Pin
1
2
3
4
5
6
7
8
Regulating voltage : 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 pulse width on Pin 5 is adapted to the load of the secondary side
(normal, overload, short circuit, no load)
Primary current simulation : 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 element. When a value is
reached that is derived from the regulating voltage at Pin 1, the output pulse at Pin 5 is terminated. The RC
element serves to set the maximum power at the overload point.
Primary voltage detector : input for primary voltage monitoring. When the line voltage is too low the IC is
switched-off by comparing V
compensation.
Ground
Output : push-pull output for charge and discharge of the gate capacitance of the power MOS transistor.
Supply voltage : Supply voltage input. From it are derived a stable internal reference voltage (V
switching threshold V
if V
V
Soft-start : input for soft-start and integration network. Start-up will begin with short pulses by connecting a
capacitor between Pin 7 to ground. This capacitor together with a resistor connected between Pin 7 and
error amplifier output also as acts an integrator network for regulation.
Zero detector : Input for the oscillator feedback. After starting oscillator, every zero transit of the feedback
voltage (falling edge) triggers an output pulse at Pin 5. The trigger threshold is at typically - 50mV
6
min < V
6
> V
6E
6
the V
< V
6
REF
max.
is switched on and switched off when V
6A
, V
6E
3
, V
with an internal reference. Voltage at Pin 3 is used for overload point
6
max and V
6
min for the supply voltage detector.
Description
6
< V
6A
. In addition the logic is only enable for
REF
) and the