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Microchip SG1843Y
Buck Regulator Positive Output Step-Down DC-DC Controller IC 8-CDIP
Brands: Microchip Technology, Inc
Mfr.Part #: SG1843Y
Datasheet: SG1843Y Datasheet (PDF)
Package/Case: CDIP8
Product Type: Power Management ICs
RoHS Status:
Stock Condition: 2574 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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Add To BomSG1843Y General Description
The SG1842/43 family of control IC's provides all the necessary features to implement off-line fixed frequency, current-mode switching power supplies with a minimum number of external components.
Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch. The band-gap reference is trimmed to ±1% over temperature.
Oscillator discharge current is trimmed to less than ±10%. The SG1842/43 has under-voltage lockout, current limiting circuitry and start-up current of less than 1mA. The totem-pole output is optimized to drive the gate of a power MOSFET. The output is low in the off state to provide direct interface to an N-channel device. The SG1842/43 is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2842/43 is specified for the industrial range of -25°C to 85°C, and the SG3842/43 is designed for the commercial range of 0°C to 70°C.
Features
- Optimized For Off-Line Control
- Low Start-Up Current (<1mA)
- Automatic Feed Forward Compensation
- Trimmed Oscillator Discharge Current
- Pulse-By-Pulse Current Limiting
- Enhanced Load Response Characteristics -
- Double-Pulse Suppression
- High-Current Totem-Pole Output (1A Peak)
- Internally Trimmed Band-gap Reference
- 500kHz Operation Under-voltage Lockout: SG1843 - 8.4 volts
- Low Shoot-Through Current <75mA Over Temperature
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer: | Microchip | Product Category: | Switching Controllers |
| Packaging: | Tube | Brand: | Microchip / Microsemi |
| Product Type: | Switching Controllers | Subcategory: | PMIC - Power Management ICs |
| Tags | SG1843Y, SG1843, SG184, SG18, SG1 | Rohs Code | No |
| Part Life Cycle Code | Active | Ihs Manufacturer | MICROCHIP TECHNOLOGY INC |
| Package Description | DIP, DIP8,.3 | Reach Compliance Code | compliant |
| ECCN Code | EAR99 | HTS Code | 8542.31.00.01 |
| Analog IC - Other Type | SWITCHING CONTROLLER | Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION | Input Voltage-Max | 25 V |
| Input Voltage-Min | 8.3 V | Input Voltage-Nom | 15 V |
| JESD-30 Code | R-GDIP-T8 | JESD-609 Code | e0 |
| Length | 10.415 mm | Number of Functions | 1 |
| Number of Terminals | 8 | Operating Temperature-Max | 125 °C |
| Operating Temperature-Min | -55 °C | Output Current-Max | 1 A |
| Package Body Material | CERAMIC, GLASS-SEALED | Package Code | DIP |
| Package Equivalence Code | DIP8,.3 | Package Shape | RECTANGULAR |
| Package Style | IN-LINE | Qualification Status | Not Qualified |
| Seated Height-Max | 5.08 mm | Surface Mount | NO |
| Switcher Configuration | SINGLE | Switching Frequency-Max | 500 kHz |
| Technology | BIPOLAR | Temperature Grade | MILITARY |
| Terminal Finish | TIN LEAD | Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54 mm | Terminal Position | DUAL |
| Width | 7.62 mm | feature-maximum-power-dissipation-mw | |
| feature-packaging | Tube | feature-type | |
| feature-rad-hard | Yes | feature-pin-count | 8 |
| feature-supplier-package | CDIP | feature-standard-package-name1 | DIP |
| feature-cecc-qualified | No | feature-esd-protection | |
| feature-military | No | feature-aec-qualified | No |
| feature-aec-qualified-number | feature-auto-motive | No | |
| feature-p-pap | No | feature-eccn-code | EAR99 |
| feature-svhc |
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 |
 |
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. |
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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.
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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.
Part points
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SG1843Y chip is an integrated circuit commonly used in power conversion applications. It is a voltage-mode PWM controller that regulates the output voltage by adjusting the duty cycle of the switching waveform. Designed for use in switch-mode power supplies, the chip offers features like current limiting, soft-start functionality, and protection against overvoltage and overtemperature conditions. Its compact size and low power consumption make it suitable for various electronic devices.
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Features
The SG1843Y is a voltage mode PWM controller that offers a fixed frequency oscillator, a precision reference, and a wide input voltage range. It includes features such as cycle-by-cycle current limiting, soft-start, and an under-voltage lockout circuit. -
Pinout
The SG1843Y is a Pulse Width Modulation (PWM) controller chip. It has 8 pins and performs the function of generating a variable duty cycle square wave output signal, which is widely used in various power electronic applications, such as switching power supplies, inverters, and motor speed control circuits. -
Application Field
The SG1843Y is a voltage-mode PWM controller, commonly used in applications such as switch-mode power supplies, inverters, and motor drives. It provides stable and regulated output voltage, making it suitable for various power electronics and industrial automation systems. -
Package
The SG1843Y chip comes in a 16-pin DIP (Dual In-Line Package) form and has a compact size of approximately 9.35mm x 6.35mm.
Datasheet PDF
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