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KA3842 Datasheet(PDF) 2 Page - Wing Shing Computer Components

Part # KA3842
Description  Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
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Manufacturer  WINGS [Wing Shing Computer Components]
Direct Link  http://www.wingshing.com/en
Logo WINGS - Wing Shing Computer Components

KA3842 Datasheet(HTML) 2 Page - Wing Shing Computer Components

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Electrical characteristics (*VCC=15V, RT=10kΩ
Ω, CT=3.3nF, TA=00C to +700C, unless
otherwise specified)
Characteristics
Symbol
Test Condition
Min
Typ
Max
Unit
Reference Section
Reference Output Voltege
VREF
TJ = 25°C, IREF = 1 mA
4.9
5.0
5.1
V
Line Regulation
∆VREF
12V
≤ VCC ≤ 25 V
6.0
20
mV
Load Regulation
∆VREF
1 mA
≤ IREF ≤ 20mA
6.0
25
Short Circit Output Current
ISC
TA = 25°C
-100
-180
mA
Oscillator Section
Oscillation Freguency
f
TJ = 25°C
47
52
57
KHz
Frequency Change with
Voltage
∆f/∆VCCF
12V
≤ VCC ≤ 25 V
0.05
1.0
%
Oscillator Amplitude
V(OSC)
1.6
Vp-p
Error Amplifier Section
Input Bias Current
IBIAS
-0.1
-2
µA
Input Voltage
VI(E.A)
V1 = 2.5V
2.42
2.5
2.58
V
Open Loop Voltage Gain
GVO
2V
≤ V0 ≤ 4V
65
90
dB
Power Supply Rejection Ratio
PSRR
12V
≤ VCC ≤ 25 V
60
70
Output Sink Current
ISINK
V2 = 2.7V, V1 = 1.1V
2
7
mA
Output Source Current
ISOURCE
V2 = 2.3V, V1 = 5V
-0.5
-1.0
mA
High Output Voltage
VOH
V2 = 2.3V, RL = 15KΩ to GND
5.0
6.0
V
Low Output Voltage
VOL
V2 = 2.7V, RL = 15KΩ to PIN 8
0.8
1.1
Current Sense Section
Gain
GV
(Note 1 & 2)
2.85
3.0
3.15
V/V
Maximum Input Signal
VI(MAX)
V1 = 5V (Note1)
0.9
1.0
1.1
V
Power Supply Rejection Ratio
PSRR
12V
≤ VCC ≤ 25 V (Note 1)
70
dB
Input Bias Current
IBIAS
-3.0
-10
µA
Output Section
Low Output Voltage
VOL
ISINK = 20 mA
0.08
0.4
ISINK = 200 mA
1.4
2.2
V
High Output Voltage
VOH
ISINK = 20 mA
13
13.5
ISINK = 200 mA
12
13.0
Rise Time
tR
TJ = 25°C, CL = 1nF (Note 3)
45
150
nS
Fall Time
tF
TJ = 25°C, CL = 1nF (Note 3)
35
150
Under
−−Voltage Lockout Section
Start Theshold
VTH(ST)
14.5
16.0
17.5
V
Min. Operating Voltage
VOPR(min)
8.5
10
11.5
V
(After Turn On)
PWM Section
Max. Duty Cycle
D(MAX)
95
97
100
%
Min. Duty Cycle
D(MAX)
0
Total Standby Current
Start
−Up Current
IST
0.17
0.3
mA
Operating Supply Current
ICC (OPR)
V3 = V2 = 0V
14
17
Zener Voltage
VZ
30
38
V
* Adjust VCC 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
KA3842A/KA3842AM


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