KA3842A Datasheet, PDF (2/5 Pages) Wing Shing Computer Components – Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)

KA3842A/KA3842AM
Electrical characteristics (*V_CC=15V, R_T=10kΩ, C_T=3.3nF, T_A=0⁰C to +70⁰C, unless
otherwise specified)
Characteristics
Reference Section
Reference Output Voltege
Line Regulation
Load Regulation
Short Circit Output Current
Oscillator Section
Oscillation Freguency
Frequency Change with
Voltage
Oscillator Amplitude
Error Amplifier Section
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Current Sense Section
Gain
Maximum Input Signal
Power Supply Rejection Ratio
Input Bias Current
Output Section
Low Output Voltage
Symbol
V_REF
∆V_REF
∆V_REF
I_SC
f
∆f/∆V_CCF
V_(OSC)
I_BIAS
V_I(E.A)
G_VO
PSRR
I_SINK
I_SOURCE
V_OH
V_OL
G_V
V_I(MAX)
PSRR
I_BIAS
V_OL
High Output Voltage
V_OH
Rise Time
t_R
Fall Time
t_F
Under−Voltage Lockout Section
Start Theshold
V_TH(ST)
Test Condition
T_J = 25°C, I_REF = 1 mA
12V ≤ V_CC ≤ 25 V
1 mA ≤ I_REF ≤ 20mA
T_A = 25°C
T_J = 25°C
12V ≤ V_CC ≤ 25 V
V₁ = 2.5V
2V ≤ V0 ≤ 4V
12V ≤ V_CC ≤ 25 V
V₂ = 2.7V, V₁ = 1.1V
V₂ = 2.3V, V₁ = 5V
V₂ = 2.3V, R_L = 15KΩ to GND
V₂ = 2.7V, R_L = 15KΩ to PIN 8
(Note 1 & 2)
V₁ = 5V (Note1)
12V ≤ V_CC ≤ 25 V (Note 1)
I_SINK = 20 mA
I_SINK = 200 mA
I_SINK = 20 mA
I_SINK = 200 mA
T_J = 25°C, C_L = 1nF (Note 3)
T_J = 25°C, C_L = 1nF (Note 3)
Min
4.9
47
2.42
65
60
2
-0.5
5.0
2.85
0.9
13
12
14.5
Typ
5.0
6.0
6.0
-100
52
0.05
1.6
-0.1
2.5
90
70
7
-1.0
6.0
0.8
3.0
1.0
70
-3.0
0.08
1.4
13.5
13.0
45
35
16.0
Max
5.1
20
25
-180
57
1.0
-2
2.58
1.1
3.15
1.1
-10
0.4
2.2
Unit
V
mV
mA
KHz
%
V_p-p
µA
V
dB
mA
mA
V
V/V
V
dB
µA
V
150
nS
150
17.5
V
Min. Operating Voltage
(After Turn On)
PWM Section
Max. Duty Cycle
Min. Duty Cycle
Total Standby Current
Start−Up Current
V_OPR(min)
D_(MAX)
D_(MAX)
I_ST
8.5
10
11.5
V
95
97
100
%
0
0.17
0.3
mA
Operating Supply Current
Zener Voltage
I_{CC (OPR)}
V_Z
V₃ = V₂ = 0V
14
17
30
38
V
* Adjust V_CC above the start threshold before setting at 15V
Note 1: Parameter measured at trip point of lath with V₂=0
Note 2: Gain defined as A=∆V₁/∆V₃ ; 0 ≤ V₃ ≤ 0.8V
Note 3: These parameters, although guaranteed, are not 100% tested in production.
2