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CS51021A Datasheet(PDF) 4 Page - ON Semiconductor

Part No. CS51021A
Description  Enhanced Current Mode PWM Controller
Download  11 Pages
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS51021A Datasheet(HTML) 4 Page - ON Semiconductor

 
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CS51021A, CS51022A, CS51023A, CS51024A
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, specifications apply for −40
°C < TA < 85°C, −40°C < TJ < 150°C,
3.0 V < VC < 20 V, 8.2 V < VCC < 20 V, RT = 12 kW, CT = 390 pF)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Oscillator
Accuracy
RT = 12 k, CT = 390 pF
230
255
280
kHz
Voltage Stability
Delta Frequency 8.2 V < VCC < 20 V
2.0
3.0
%
Temperature Stability
TMIN < TA < TMAX, (Note 3)
8.0
%
Min Charge & Discharge Time
(Note 3)
0.333
ms
Duty Cycle Accuracy
RT = 12 k, CT = 390 pF
70
77
83
%
Peak Voltage
(Note 3)
3.0
V
Valley Voltage
(Note 3)
1.5
V
Valley Clamp Voltage
10 k Resistor to ground on RTCT
1.2
1.4
1.6
V
Discharge Current
0.8
1.0
1.2
mA
Discharge Current
TA = 25
°C, Note 3
0.925
1.0
1.075
mA
Synchronization (CS51021A/3A)
Input Threshold
1.0
1.5
2.7
V
Output Pulsewidth
160
260
400
ns
Output High Voltage
ISYNC = 100 mA
3.5
4.3
4.8
V
Input Resistance
(Note 3)
35
70
140
k
W
Drive Delay
SYNC to GATE RESET
80
120
150
ns
Output Drive Current
1.0 k Load
1.25
2.0
3.5
mA
SLEEP (CS51022A/4A)
SLEEP Input Threshold
Active High
1.0
1.5
2.7
V
SLEEP Input Current
VSLEEP = 4.0 V
11
25
46
mA
ICC @ SLEEP
VCC ≤ 15 V
50
100
mA
GATE Driver
HIGH Voltage
Measure VC − GATE, VC = 10 V, 150 mA Load
1.5
2.2
V
LOW Voltage
Measure GATE − PGND, 150 mA SINK
1.2
1.5
V
HIGH Voltage Clamp
VC = 20 V, 1.0 nF
11
13.5
16
V
LOW Voltage Clamp
Measured at 10 mA Output Current
0.6
0.8
V
Peak Current
VC = 20 V, 1.0 nF, (Note 3)
1.0
A
UVL Leakage
VC = 20 V measured at 0 V
−1.0
−50
mA
RISE Time
Load = 1.0 nF, 1.0 V < GATE < 9.0 V,
VC = 20 V, TA = 25°C
60
100
ns
FALL Time
Load = 1.0 nF, 9.0 V > GATE > 1 .0 V,
VC = 20 V
15
40
ns
SLOPE Compensation
Charge Current
SLOPE = 2.0 V
−63
−53
−43
mA
COMP Gain
Fraction of slope voltage added to ISENSE,
(Note 3)
0.095
0.100
0.105
V/V
Discharge Voltage
SYNC = 0 V
0.1
0.2
V
3. Guaranteed by design, not 100% tested in production.


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