S6520P Datasheet, PDF (2/6 Pages) AUK corp – LCD Back Light Inverter with Analog Dimming

Internal Block Diagram
S6520P
Ct1 1
Ct2 15
CMP1 ⁵
FB1 4
ADIM ¹¹
SS 2
FB2 ¹³
CMP2 12
GND 8
+
Oscillator1
-
Vref
+ Oscillator2
-
Vref
Open Lamp Regulation
regulation signal
to COMP1, COMP2
+
+
-
Vref
3 _OLR1
14 OLR2
7V Vz
5V Vref
Internal
bias
Enable Switch
ena
+
-
1.4V
9 Vcc
6 _ENA
Amplifier 1
-
+
+
+
Comparator 1
-
+
+
Output 1
Vref
iss
Amplifier 2
+
+
-
+
Vref
Comparator 2
-
+
+
Output 2
delay timer
+
Shut Down Signal to Output _{Q S 10us}
+
R
-
reset signal from bias
Short Circuit Protection
7 OUT1
10 _OUT2
from FB1
from FB2
n*Vref
16 _REF
PIN Collection
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
CT1
SS
OLR1
FB1
CMP1
ENA
OUT1
GND
VCC
OUT2
ADIM
CMP2
FB2
OLR2
CT2
REF
I/O
Pin Function Description
I
Frequency Trimming Capacitor for Main Frequency Setting 1
I
Initial Soft Start
I
Open Lamp Regulation 1
I
Feedback 1 (Error Amplifier Negative Input)
-
Error Amplifier Output 1
I
ON/OFF Control Pin. TTL Signal is Applicable.
O
Output Drive1
-
Ground
I
Supply Voltage
O
Output Drive 2
-
Analog Dimming Input
-
Error Amplifier Output 2
I
Feedback 2 (Error Amplifier Negative Input)
I
Open Lamp Regulation 2
I
Frequency Trimming Capacitor for Main Frequency Setting 2
O
Reference Voltage (VREF) = 5V
KSI-L016-000
2