CS3524A Datasheet, PDF (4/8 Pages) Cherry Semiconductor Corporation – Voltage Mode PWM Control Circuit with 200mA Output Drivers

CS3524A
ELECTRICAL CHARACTERISTICS (continued) (0°C ≤ T_A ≤ +70°C, V_IN = V_CC = 20 V; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Current Limit Amplifier (continued) V_SENSE = V_O; unless otherwise specified
Output Swing
Minimum Total Range
0.5
−
5.0
V
Open Loop Voltage Gain
Delay Time (Note 4)
Output Section (Each Output)
ΔV_OUT = 1.0 to 4.0 V, R_L ≥ 10 MΩ
ΔV_IN = 300 mV
70
80
−
dB
−
300
−
ns
Collector Emitter Voltage
Collector Leakage Current
Saturation
I_C = 100 μA
V_CE = 50 V
I_C = 20 mA
I_C = 200 mA
60
80
−
V
−
0.1
20
μA
−
0.2
0.4
V
−
1.0
2.2
V
Emitter Output Voltage
I_E = 50 mA
Rise Time (Note 4)
T_A = 25°C, R = 2.0 kΩ
Fall Time (Note 4)
T_A = 25°C, R = 2.0 kΩ
Comparator Delay (Note 4)
T_A = 25°C, V_COMP to V_OUT
Shutdown Delay (Note 4)
T_A = 25°C, V_SHUT to V_OUT
Shutdown Threshold
T_A = 25°C, R_C = 2.0 kΩ
Thermal Shutdown (Note 4)
−
4. These parameters are guaranteed by design but not 100% tested in production.
17
18
−
V
−
200
−
ns
−
100
−
ns
−
300
−
ns
−
200
−
ns
0.5
0.7
1.0
V
−
165
−
°C
TYPICAL PERFORMANCE CHARACTERISTICS
80 ^{RF = ∞}
R_F = 1 M Ω
60 ^{RF = 300 kΩ}
R_F = 100 kΩ
40 ^{RF = 30 kΩ}
V_IN = 20 V
T_A = 25°C
20
R_F is impedance to ground.
Values below 30 kΩ will
0 ^{begin to limit the maximum}
duty−cycle.
100
1k
10 k
100 k
1M
Frequency (Hz)
Figure 2. Error Amplifier Voltage Gain vs.
Frequency Over RF
50
V_IN = 20 V
40
R_T = 2700 Ω
T_A = 25°C
30
C_T = 10 μF
20
C_T = 1 μF
10
0
0
1
2
3
4
5
Input Voltage V_IN
Figure 3. Duty Cycle vs. Input Voltage
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