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2. SMPS POWER IC (STR-S6709)
2-1 Outline
The STR-S6700 series is a Hybrid IC with a built-in power
transistor and a separate excitation control IC, designed for
converter type switch mode power supply applications.
The IC is capable of quasi-resonant mode and requires
2-2 Features
• Small SIP isolated package-In a small SIP isolated
package easy to handle.
• small number of esternal components-By just adding
several esternal components, a switchmode poser
supply can be easily formed.
• Lower power dissipation at a lighter load
- Able to reduce power dissipation at a lighter load mode
2-3. Block Diagram
2-4. Pin Description
No
Symbol
1
C
2
GND
3
B
4
SINK
5
DRIVE
6
OCP
7
F/B
8
INH
9
V
Name
Collector terminal
Ground terminal
Base terminal
Sink terminal
Drive terminal
Over-Current terminal
Feed-Back terminal
Inhibit terminal
Voltage input terminal
IN
small number of external components, and simplifies
circuits design. It is very suitable for downsizing and
standardization of power supplies.
(ex. remote control stand-by mode of TVs), by
suppressing a oscillation frequency below 20KHz.
• Many protection functions
- Pulse-by-pulse over current protection over voltage
protection with a latch therminal protection with a latch.
These protection functions are in corporated and can be
latched with a external signal.
483-920B인용
PTR collector
Ground(PTR Emitter)
PTR Base
Base current (IB1) input
Base Starting current
Over-Current Detecting signal input
Constant Voltage controling signal input
OFF-Time Sync. latch circuit Operating signal input
Control circuit voltage input
- 25 -
Function
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