Denon DRA-100, Руководство по обслуживанию

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ICE3BR1765J (SMPS : IC871)
ICE3BR1765J Block Diagram
ICE3BR1765J Pin Discription
Pin Symbol Function
1 BA extended Blanking
2 FB FeedBack
3 CS Current Sense / 650V *1 CoolMOS® Source
4 Drain 650V *1 CoolMOS Drain
5 Drain 650V *1 CoolMOS® Drain
6 n.c. Not connected
7 VCC Controller Supply Voltage
8 GND Controller GrouND
*1 at Tj=110℃
Version 2.0 6 10 Jun 2008
CoolSET
®
-F3R
ICE3BR1765J
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1
Pin Configuration with PG-DIP-8
Figure 1 Pin Configuration PG-DIP-8 (top view)
Note: Pin 4 and 5 are shorted
1.2 Pin Functionality
BA (extended Blanking & Auto-restart)
The BA pin combines the functions of extendable
blanking time for over load protection and the external
auto-restart enable. The extendable blanking time
function is to extend the built-in 20 ms blanking time by
adding an external capacitor at BA pin to ground. The
external auto-restart enable function is an external
access to stop the gate switching and force the IC enter
auto-restart mode. It is triggered by pulling down the
BA pin to less than 0.33V.
FB (Feedback)
The information about the regulation is provided by the
FB Pin to the internal Protection Unit and to the internal
PWM-Comparator to control the duty cycle. The FB-
Signal is the only control signal in case of light load at
the Active Burst Mode.
CS (Current Sense)
The Current Sense pin senses the voltage developed
on the series resistor inserted in the source of the
integrated CoolMOS
®
If voltage in CS pin reaches the
internal threshold of the Current Limit Comparator, the
Driver output is immediately switched off. Furthermore
the current information is provided for the PWM-
Comparator to realize the Current Mode.
Drain (Drain of integrated CoolMOS
®
)
Drain pin is the connection to the Drain of the
integrated CoolMOS
®
.
VCC (Power Supply)
VCC pin is the positive supply of the IC. The operating
range is between 10.5V and 25V.
GND (Ground)
GND pin is the ground of the controller.
Pin Symbol Function
1 BA extended Blanking & Auto-restart
2 FB FeedBack
3 CS Current Sense/
650V
1) CoolMOS ® Source
1)
at T
j
=110°C
4 Drain
650V
1)
CoolMOS
®
Drain
5 Drain
650V
1)
CoolMOS
®
Drain
6 n.c. Not connected
7 VCC Controller Supply Voltage
8 GND Controller GrouND
Package PG-DIP-8
1
6
7
8
4
3
2
5
GND BA
FB
CS
VCC
n.c.
Drain Drain
Co
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