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CS5661 데이터시트(PDF) 7 Page - Cherry Semiconductor Corporation

부품명 CS5661
상세설명  High Performance Dual Channel Current Mode Controller with ENABLE
PDF  8 Pages
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제조업체  CHERRY [Cherry Semiconductor Corporation]
홈페이지  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS5661 데이터시트(HTML) 7 Page - Cherry Semiconductor Corporation

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7
ter capacitor. Ceramic bypass capacitors (0.1µF) connected
directly to VCC and VREF may be required to improve noise
filtering. This provides a low impedance path for filtering
the high frequency noise. All high current loops should be
kept as short as possible using heavy copper runs. The
error amp compensation circuitry and the converter out-
put voltage-divider should be located close to the IC and
as far as possible from the power switch and other noise
generating components.
Operating Description: continued
SYNC
Capacitor CT
Latch 1
“Set” Input
COMP1
Sense1
VOUT1
Latch 1
“Reset” Input
ENABLE2
Latch 2
“Set” Input
COMP2
Sense2
Latch 2
“Reset” Input
VOUT2
0V
Timing Diagram
+
-
+
+
+
+
-
RT
CT
VFB
1
Reference
Regulator
VREF
UVLO
3.4V
8.4V
2.5V
R
R
20kΩ
VREF
Sync
1mA
2R
1.0V
250µA
R
2R
Error
Amp 2
COMP1
ENABLE2
VFB
2
COMP2
Gnd
Pwr Gnd
R
1.0V
Current Sense
Comparator 2
Current Sense
Comparator 1
R
S
R
S
R
PWM
Latch 2
PWM
Latch 1
VCC
VIN
VOUT1
VOUT2
Sense1
Q1
Q2
RSense1
Sense2
RSense2
-
+
-
Error
Amp 1
VOUT1
VOUT2
COUT2
COUT1
5.0V
Q
Oscillator
Internal
Bias
CF1 +
L1
D1
L2
D2
+
+
CF2
RFB
1
RFB
2
RFB
3
RFB
4
VOUT
2
VOUT1
Dual Boost Regulator
VCC
UVLO
+
Q
+
-
+
-
+
-
+
-
1mA
Typical Application Diagram



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