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NCP1251BSN100T1G
Switching Controllers PWM Controller, Current Mode, for Offline Power Supplies
Brands: onsemi
Mfr.Part #: NCP1251BSN100T1G
Datasheet: NCP1251BSN100T1G Datasheet (PDF)
Package/Case: SOT-23-6Thin,TSOT-23-6
RoHS Status:
Stock Condition: 5539 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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Add To BomNCP1251BSN100T1G General Description
The NCP1251 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP-6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current.
Over Power Protection (OPP) is a difficult exercise especially when no-load standby requirements drive the converter specifications. The ON proprietary integrated OPP lets you harness the maximum delivered power without affecting your standby performance simply via two external resistors. A latched Over Voltage Protection (OVP) is combined on the same pin. For ease of implementation, an auto-recovery OVP also monitors the Vcc line. These features offer an efficient protection in case of optocoupler failure or adverse open loop operation.
Finally, a timer-based short-circuit protection offers the best protection scheme, letting you precisely select the protection trip point irrespective of a loose coupling between the auxiliary and the power windings.
Features
- Non-dissipative internal and adjustable Over Power Protection (OPP)
- Frequency Foldback down to 26 kHz and Skip-Cycle in light load conditions
- Internal Ramp Compensation
- Frequency jittering from full load to skip-cycle
- Latch input for OVP and OTP implementations
- Over Voltage Protection (OVP) monitoring on the Vcc pin
- See NCP1250 for no Over Voltage Protection (OVP) on the Vcc pin
Application
- Offline Adapters
- AC-DC converters
- 45W Adapter
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Product Status | Active | Output Isolation | Isolated |
| Internal Switch(s) | No | Topology | Flyback |
| Voltage - Start Up | 18 V | Voltage - Supply (Vcc/Vdd) | 8.8V ~ 28V |
| Duty Cycle | 80% | Frequency - Switching | 100kHz |
| Fault Protection | Over Power, Over Voltage, Short Circuit | Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 | Supplier Device Package | 6-TSOP |
| Mounting Type | Surface Mount |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
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EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time：Shipping fee depend on different zone and country.
Payment
| Terms of payment | Hand Fee | |
|---|---|---|
 |
Wire Transfer | charge US$30.00 banking fee. |
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Paypal | charge 4.0% service fee. |
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Credit Card | charge 3.5% service fee. |
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Western Union | charge US.00 banking fee. |
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Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
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Step1 :Product
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Step2 :Vacuum packaging
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![Anti-static bag]( "Anti-static bag")
Step3 :Anti-static bag
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Step4 :Individual packaging
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Step5 :Packaging boxes
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Step6 :bar-code shipping tag
All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
We provide high quality products, thoughtful service and after sale guarantee
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We have rich products, can meet your various needs.
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Minimum order quantity starts from 1pcs.
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Lowest international shipping fee starts from $0.00
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365 days quality guarantee for all products
