Specifications |
| SG5842JASZ | Full Production | RoHS Compliant | $0.264 | SOIC | 8 | TAPE REEL | | Line 1: SG5842JASZ Line 2: C3&6&3&Z |
* Fairchild 1,000 piece Budgetary Pricing
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| ** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples |
Package marking information for product SG5842JA is available. Click here for more information . |
DescriptionThe highly integrated SG5842JA series of PWM controllers provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency at light-load conditions. To avoid acoustic-noise problem, the minimum PWM frequency set above 22KHz. This green-mode function of SG5842JA enables the power supply to meet international power conservation requirements. To further reduce power consumption, SG5842A/JA is manufactured using the BiCMOS process. This allows a low start-up current, around 14?A, and an operating current of only 4mA. As a result, a large start-up resistance can be used.
The SG5842JA built-in synchronized slope compensation achieves stable peak-current-mode control.
SG5842JA integrates a frequency hopping function that helps reduce EMI emission of a power supply with minimum line filters.
SG5842JA provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety should an open loop or output short-circuit failure occur. PWM output is disabled until VDD drops below the UVLO lower limit, then the controller starts again. As long as VDD exceeds about 24V, the internal OVP circuit is triggered. An external NTC thermistor can be applied for over-temperature protection.
SG5842JA is available in an 8-pin DIP or SOP package.
SG5842JA Data Sheet
