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CS5101 Datasheet(PDF) 4 Page - Cherry Semiconductor Corporation

Part # CS5101
Description  Secondary Side Post Regulator for AC/DC and DC/DC Multiple Output Converters
PDF  7 Pages
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Manufacturer  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS5101 Datasheet(HTML) 4 Page - Cherry Semiconductor Corporation

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4
PACKAGE PIN #
PIN SYMBOL
FUNCTION
Package Pin Description
14L PDIP
16L SO Wide
1
1
SYNC
Synchronization input.
22
VCC
Logic supply (10V to 45V).
33
VREF
5.0V voltage reference.
4
LGnd
Logic level ground (Analog and digital ground tied).
56
VFB
Error amplifier inverting input.
6
7
COMP
Error amplifier output and compensation.
7
8
RAMP
RAMP programmable with the external capacitor.
8
9
IS+
Current sense amplifier non-inverting input.
9
10
IS-
Current sense amplifier inverting input.
10
11
IS COMP
Current sense amplifier compensation and output.
11
12, 13
PGnd
Power ground.
12
14
VG
External power switch gate drive.
13
15
VC
Output power stage supply voltage (8V to 75V).
14
16
VD
External FET DRAIN Voltage Monitor.
5
AGnd
Analog Ground.
4
DGnd
Digital Ground.
Circuit Description
COMP
RAMP
LGnd
SYNC
LATCH
Q
VREF
PGnd
IS COMP
VD
5V
VC
VG
IS
Q1
Q2
REF_OK
G1
G2
I = 200
mA
VFB
2.5V
2V
Q3
+
Ð
SYNC
VCC_OK
+
Ð
VCC
S
R
PWM
+
Ð
4.5V/4.4V
1.65V
+
Ð
RAMP
+
+
Ð
Ð
+
Ð
EA
+
Ð
BUF
+
Ð
IS+
IS-
1.5V
0.7V
Q4
+
Ð
SLEEP
VCC
+
Ð
REF
UVL
OK
0.7V
8V/7V
2.4V
24.6k
5V
5V
5V
5V
5V
5V
VCC
10k
10k
5V
5V
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
VCC
+
VC
Q
Block Diagram



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