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UC3843BN PWM Controller, 500 kHz 8-Pin, PDIP
UC3843BN PWM Controller, 500 kHz 8-Pin, PDIP
• Low Start up Current
• Maximum Duty Clamp
• UVLO With Hysteresis
• Operating Frequency up to 500KHz
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Description
UC3843BN PWM Controller, 500 kHz 8-Pin, PDIP
The UC3842/UC3843/UC3844/UC3845 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 for driving a Power MOSFET The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off), The UC3843 and UC3845 are 8.5V(on) and 7.9V (off). The UC3842 and UC3843 can operate within 100% duty cycle. The UC3844 and UC3845 can operate with 50% duty cycle.
Specifications:
| Attribute | Value |
| Maximum Switching Frequency | 500 kHz |
| Output Current | 1 A |
| Control Method | Current |
| Number of Outputs | 1 |
| Mounting Type | Through Hole |
| Fall Time | 50ns |
| Rise Time | 50ns |
| Package Type | PDIP |
| Topology | Boost, Flyback, Forward |
| Pin Count | 8 |
| Maximum Duty Cycle | 100% |
| Dimensions | 10.92 x 6.6 x 3.32mm |
| PWM Controller Type | Current Mode |
| Length | 10.92mm |
| Width | 6.6mm |
| Height | 3.32mm |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +150 °C |
Package Includes:
- 1x UC3843
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