STMicroelectronics 3845B is a high Performance current mode PWM controller. The 3845B control IC family provides the features required to implement off-line or DC to DC fixed frequency current mode control schemes with a low external part count. Internally implemented circuits include a trimmed oscillator with start-up current less than 0.5mA for precise DUTY CYCLE CONTROL under voltage lock-out, a precision reference trimmed for accuracy at the error amp input, logic to ensure latched operation, a PWM comparator with current limit control, and a totem pole output stage designed to source or sink high peak current. In the off-state, the output stage is low, making it suitable for driving N-Channel MOSFETs.
Features
- Trimmed oscillator for precise frequency control
- Oscillator frequency guaranteed at 250KHz
- Automatic feed forward compensation
- Latching PWD for cycle-by-cycle current limiting
- High current totem pole output
- Low start-up and operating current
Specification
s| Model | 3845B |
| Brand | STMicroelectronics |
| Mounting Type | SMD |
| Package | SO8 |
| No. of Pin | 8 |
| Supply Voltage | 30V |
| Output Current | 1A |
| Operating Temperature | -40~150°C |
FAQs
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