Specifications |
| SG5841DZ | Full Production | RoHS Compliant | $0.374 | DIP | 8 | RAIL | | Line 1: SG5841DZ Line 2: D3&6&3&Z |
| SG5841SZ | Full Production | RoHS Compliant | $0.374 | SOIC | 8 | TAPE REEL | | Line 1: SG5841SZ Line 2: D3&6&3&Z |
| SG5841SZ_F116 | Not recommended for new designs | RoHS Compliant | N/A | SOIC | 8 | TAPE REEL | | Line 1: SG5841SZ Line 2: A3&6&3&Z |
| SG5841SZ_SB82167 | Not recommended for new designs | RoHS Compliant | N/A | SOIC | 8 | TAPE REEL | | Line 1: SG5841SZ Line 2: E3&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 SG5841 is available. Click here for more information . |
DescriptionThe highly integrated SG5841/J 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. This green-mode function enables the power supply to meet international power conservation requirements. To further reduce power consumption, SG5841/J 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 SG5841/J built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary internal sawtooth power-limiter ensures constant output power limit over a wide range of AC input voltages, from 90VAC to 264VAC.
SG5841/J 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. An external NTC thermistor can be applied for over-temperature protection.
SG5841/J is available in an 8-pin DIP or SOP package.
SG5841 Data Sheet
