KA3843B
ObsoletePWM CONTROLLER PROGRAMMABLE FREQUENCY UPTO 500KHZ
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KA3843B
ObsoletePWM CONTROLLER PROGRAMMABLE FREQUENCY UPTO 500KHZ
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Technical Specifications
Parameters and characteristics for this part
| Specification | KA3843B |
|---|---|
| Control Features | Frequency Control |
| Duty Cycle | 97 % |
| Internal Switch(s) | False |
| Mounting Type | Through Hole |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Package / Case | 0.3 in |
| Package / Case | 8-DIP |
| Package / Case | 7.62 mm |
| Supplier Device Package | 8-DIP |
| Voltage - Start Up | 8.4 V |
| Voltage - Supply (Vcc/Vdd) [Max] | 25 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 12 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Bulk | 987 | $ 0.30 | |
| 987 | $ 0.30 | |||
Description
General part information
KA3843B Series
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. 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.
Documents
Technical documentation and resources
