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CS51221 Datasheet(PDF) 7 Page - ON Semiconductor

Part # CS51221
Description  Enhanced Voltage Mode PWM Controller
PDF  14 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS51221 Datasheet(HTML) 7 Page - ON Semiconductor

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CS51221
http://onsemi.com
7
VCC
+
−
+
−
−
+
VREF = 3.3 V
UV Lockout
Start/Stop
UVL
ENABLE
VREF OK
3.1 V
3.3 V
Thermal
Shutdown
2.0 mA (maximum load current)
Low Sat
Gate Driver
13.5 V
S
R
Q
Q
G1
OSC
G2
+
−
VBG
(1.263 V)
EAMP
−
+
3.0 V
2.0 V to 1.0 V Trip Points
+
−
Max Duty Cycle
(Sat Sense)
+
−
PWM
Comp
Soft−Start Clamp
SS to 1.8 V Max
FF Discharge
G3
+
−
150 ns
Blank
DISABLE
ILIM
−
+
Max SS
Det
(Sat Sense)
VREF
50
mA
G4
3.0 V
+
−
Latching
Discharge
−
+
1.0 V
2.0 V
OV Monitor
UV Monitor
5.0
mA
VREF
VC
GATE
PGND
LGND
SS
OV
UV
SYNC
RTCT
VFB
COMP
FF
ISENSE
ISET
VO Off
ON
Figure 2. Block Diagram



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