Current Mode PWM Controllers PWM Control IC
KA3842B: Current Mode PWM Controllers PWM Control IC
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Switching Frequency : | 500 KHz | Duty Cycle (Max) : | 100 % |
Rise Time : | 45 ns | Fall Time : | 35 ns |
Operating Supply Current : | 17 mA | Number of Outputs : | 1 |
Maximum Operating Temperature : | + 70 C | Mounting Style : | Through Hole |
Package / Case : | DIP-8 |
Characteristic |
SYMBOL |
RATING |
UNITS |
Supply Voltage |
VCC |
30 |
V |
Output Current |
IO |
±1 |
A |
Analog Inputs (Pin 2.3) |
V(ANA) |
-0.3 to 6.3 |
V |
Error Amp Output Sink Current |
ISINK (E.A) |
10 |
mA |
Power Dissipation (TA = 25°C) |
PD |
1 |
W |
Product | Product status | Eco Status | Pricing* | Package type | Leads | Packing method | Package Drawing |
---|---|---|---|---|---|---|---|
KA3842B | Full Production | RoHS Compliant | $0.445 | DIP | 8 | RAIL | |
KA3842BDTF | Full Production | RoHS Compliant | $0.56 | SOP | 14 | TAPE REEL |
* Fairchild 1,000 piece Budgetary Pricing |
** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples |
The KA3842B/KA3843B/KA3844B/KA3845B are fixed frequency current-mode PWM controller. They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier. current sensing comparator, and a high current totempole output Ideally suited for driving a power MOSFET. Protection circuity Includes built in under-voltage lockout and current limiting. The KA3842B and KA3844B have UVLO thresholds of 16V (on) and 10V (off) The KA3843B and KA3845B are 8.5V (on) and 7.9V (off) The KA3842B and KA3843B can operate within 100% duty cycle. The KA3844B and KA3845B can operate with 50% duty cycle.
Technical/Catalog Information | KA3842B |
Vendor | Fairchild Semiconductor |
Category | Integrated Circuits (ICs) |
PWM Type | Current Mode |
Number of Outputs | 1 |
Package / Case | 8-DIP |
Packaging | Tube |
Duty Cycle | 100% |
Voltage - Supply | 12 V ~ 30 V |
Frequency-Max | 500kHz |
Buck | No |
Boost | No |
Flyback | No |
Inverting | No |
Doubler | No |
Divider | No |
Cuk | No |
Isolated | No |
Drawing Number | * |
Lead Free Status | Lead Free |
RoHS Status | RoHS Compliant |
Other Names | KA3842B KA3842B |