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CS51221 Datasheet(PDF) 4 Page - Cherry Semiconductor Corporation

Part # CS51221
Description  Enhanced Voltage Mode PWM Controller
PDF  12 Pages
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Manufacturer  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS51221 Datasheet(HTML) 4 Page - Cherry Semiconductor Corporation

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Electrical Characteristics: -40˚C < TA < 85˚C; -40˚C < TJ < 125˚C; 3V < VC < 15V; 4.7V < VCC < 15V; Rt=12K, Ct=390pF
Unless otherwise stated.
4
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
s
Oscillator
Frequency Accuracy
260
273
320
kHz
Voltage Stability
1
2
%
Temperature Stability
(Note 1) -40˚C < TJ < 125˚C8
%
Max Frequency
(Note 1)
1
MHz
Duty Cycle
80
85
90
%
Peak Voltage
(Note 1)
1.94
2.00
2.06
V
Valley Clamp Voltage
0.90
0.95
1.00
V
Valley Voltage
(Note 1)
0.85
1.00
1.15
V
Discharge Current
0.85
1.00
1.15
mA
s
Synchronization
Input Threshold
0.9
1.4
1.8
V
Output Pulse Width
200
320
450
ns
Output High Voltage
100µA Load
2.1
2.5
2.8
V
Input Resistance
35
70
140
kΩ
SYNC to Drive Delay
Time from SYNC to
100
140
180
ns
GATE Shutdown
Output Drive Current
RSYNC = 1Ω
1.00
1.50
2.25
mA
s
GATE Driver
High Saturation Voltage
VC-GATE, VC = 10V,
1.5
2.0
V
ISOURCE = 200mA
Low Saturation Voltage
GATE-PGnd, ISINK = 200mA
1.2
1.5
V
High Voltage Clamp
11.0
13.5
16.0
V
Output Current
1 nF load (Note 1)
1
1.25
A
Output UVL Leakage
GATE = 0V
1
50
µA
Rise Time
1nF load, VC = 20V, 1V < GATE < 9V
60
100
ns
Fall Time
1nF load, VC = 20V, 9V < GATE < 1V
25
50
ns
Max Gate Voltage
IGATE = 500µA
.4
.7
1.0
V
during UVL/Sleep
s
FeedForward (FF)
Discharge Voltage
IFF = 2mA
0.3
0.7
V
Discharge Current
FF = 1V
2
16
30
mA
FF to GATE Delay
50
75
125
ns



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