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Orders Over
$5000
ST UC3842BD1
Switching Controllers 0.5mA Current Mode
Brands: STMicroelectronics, Inc
Mfr.Part #: UC3842BD1
Datasheet: UC3842BD1 Datasheet (PDF)
Package/Case: SOP8
RoHS Status:
Stock Condition: 3,341 pcs, New Original
Product Type: DC DC Switching Controllers
Warranty: 1 Year Ovaga Warranty - Find Out More
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1
*All prices are in USD
| Qty | Unit Price | Ext Price |
|---|---|---|
| 1 | $0.618 | $0.618 |
| 10 | $0.513 | $5.130 |
| 30 | $0.462 | $13.860 |
| 100 | $0.410 | $41.000 |
| 500 | $0.379 | $189.500 |
| 1000 | $0.361 | $361.000 |
In Stock: 3,341 PCS
UC3842BD1 General Description
The UC284xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC2842B and UC2844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC2843B and UC2845B are 8.5V and 7.9V. The UC2842B and UC2843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC2844B and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
Features
- LOW START-UP AND OPERATING CURRENT
- UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
- INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT
- CURRENT LIMITING
- TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
- CURRENT MODE OPERATION TO 500kHz
- OSCILLATOR FREQUENCY GUARANTEED AT 250kHz
- LATCHING PWM FOR CYCLE-BY-CYCLE
- HIGH CURRENT TOTEM POLE OUTPUT
- AUTOMATIC FEED FORWARD COMPENSATION
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer: | STMicroelectronics | Product Category: | Switching Controllers |
| RoHS: | Y | Topology: | Boost, Flyback, Forward |
| Number of Outputs: | 1 Output | Switching Frequency: | 500 kHz |
| Duty Cycle - Max: | 100 % | Output Voltage: | 4.90 V to 5.10 V |
| Output Current: | 1000 mA | Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 150 C | Mounting Style: | SMD/SMT |
| Package / Case: | SO-8 | Packaging: | Tube |
| Series: | UC3842B | Type: | Current Mode PWM Controllers |
| Brand: | STMicroelectronics | Fall Time: | 50 ns |
| Operating Supply Voltage: | 30 V | Product Type: | Switching Controllers |
| Rise Time: | 50 ns | Factory Pack Quantity: | 2000 |
| Subcategory: | PMIC - Power Management ICs | Unit Weight: | 0.017870 oz |
| Tags | UC3842BD1, UC3842BD, UC3842B, UC3842, UC384, UC38, UC3 | Pin Count | 8 |
| Package Category | Small Outline Packages | Released Date | Sep 9, 2022 |
| Last Modified Date | Mar 7, 2023 4:10 PM UTC |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
 |
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 |
 |
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. |
 |
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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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.
Datasheet PDF
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