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 sen.
• Low Start up Current
• Maximum Duty Clamp
• UVLO With Hysteresis
• Operating Frequency up to 500KHz
Description
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 for driving a power MOSFET. The KA3842B and KA3844B have UVLO thresholds .
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | KA3843 |
ETC |
CurrentMode PWM Controller | |
2 | KA3843A |
Wing Shing |
Current Mode PWM Controller | |
3 | KA3843AC |
Fairchild Semiconductor |
SMPS Controller | |
4 | KA3843AM |
Wing Shing |
Current Mode PWM Controller | |
5 | KA3842 |
ETC |
CurrentMode PWM Controller | |
6 | KA3842A |
Wing Shing Computer Components |
PWM CONTROLLER | |
7 | KA3842AC |
Fairchild Semiconductor |
SMPS Controller | |
8 | KA3842AE |
Fairchild Semiconductor |
SMPS Controller | |
9 | KA3842AM |
Wing Shing Computer Components |
PWM CONTROLLER | |
10 | KA3842B |
Fairchild |
SMPS Controller | |
11 | KA3844 |
ETC |
CurrentMode PWM Controller | |
12 | KA3844B |
Fairchild |
SMPS Controller |