UC3844BD1R2G
Current Mode PWM Controller 1A 500kHz 8-Pin SOIC N T/R
Quantity | Unit Price(USD) | Ext. Price |
---|---|---|
1 | $0.508 | $0.51 |
10 | $0.423 | $4.23 |
30 | $0.381 | $11.43 |
100 | $0.340 | $34.00 |
500 | $0.286 | $143.00 |
1000 | $0.275 | $275.00 |
Inventory:9,237
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Part Number : UC3844BD1R2G
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Package/Case : 8-SOIC(0.154",3.90mmWidth)
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Brands : onsemi
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Components Categories : DC DC Switching Controllers
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Datesheet : UC3844BD1R2G DataSheet (PDF)
Overview of UC3844BD1R2G
The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering, and a flip-flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%.
These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.
The UCX844B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX845B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Key Features
- Trimmed Oscillator for Precise Frequency Control
- Oscillator Frequency Guaranteed at 250 kHz
- Current Mode Operation to 500 kHz Output Switching Frequency
- Output Deadtime Adjustable from 50% to 70%
- Automatic Feed Forward Compensation
- Latching PWM for Cycle-By-Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- Pb-Free Packages are Available
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Product Status | Active | Output Type | Transistor Driver |
Function | Step-Up, Step-Up/Step-Down | Output Configuration | Positive, Isolation Capable |
Topology | Boost, Flyback | Number of Outputs | 1 |
Output Phases | 1 | Voltage - Supply (Vcc/Vdd) | 10V ~ 36V |
Frequency - Switching | Up to 500kHz | Duty Cycle (Max) | 48% |
Synchronous Rectifier | No | Clock Sync | No |
Control Features | Frequency Control | Operating Temperature | 0°C ~ 70°C (TA) |
Mounting Type | Surface Mount | Package / Case | 8-SOIC (0.154", 3.90mm Width) |
Supplier Device Package | 8-SOIC | Base Product Number | UC3844 |
Warranty & Returns
Warranty, Returns, and Additional Information
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QA & Return Policy
Parts Quality Guarantee: 365 days
Returns for refund: within 90 days
Returns for Exchange: within 90 days
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Parts Packaging Guarantee: Featuring 100% ESD anti-static protection, our packaging incorporates high toughness and superior buffering capabilities.
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