Datasheet Details
| Part number | IW1678 |
|---|---|
| Manufacturer | iWatt |
| File Size | 574.33 KB |
| Description | Low-Power Off-line Digital Green-Mode PWM Controller |
| Datasheet | IW1678-iWatt.pdf |
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Overview: iW1678 Low-Power Off-line Digital Green-Mode PWM Controller 1.
| Part number | IW1678 |
|---|---|
| Manufacturer | iWatt |
| File Size | 574.33 KB |
| Description | Low-Power Off-line Digital Green-Mode PWM Controller |
| Datasheet | IW1678-iWatt.pdf |
|
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●● Primary-side feedback eliminates opto-isolators and simplifies design ●● 64-kHz PWM switching frequency ●● No-load power consumption < 100 mW at 230 Vac with tight dynamic load transient response ●● Able to meet < 30 mW no-load power consumption with large value pre-load resistor ●● Adaptive multi-mode PWM/PFM control improves efficiency ●● Quasi-resonant operation for highest overall efficiency ●● EZ-EMI ® design to easily meet global EMI standards ●● Direct drive of low-cost BJT switch ●● Dynamic base current control ●● Very tight constant voltage and constant current regulation with primary-side-only feedback The iW1678 is a high performance AC/DC power supply controller which uses digital control technology to build peak current mode PWM flyback power supplies.
The iW1678’s 64-kHz PWM switching frequency allows the design of ultracompact AC/DC a
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