ST UC3845BD1
Switching Controllers 52kHz 1A Current PWM
Brands: STMicroelectronics, Inc
Mfr.Part #: UC3845BD1
Datasheet: UC3845BD1 Datasheet (PDF)
Package/Case: SO-8
RoHS Status:
Stock Condition: 2680 pcs, New Original
Product Type: Power Management ICs
Warranty: 1 Year Ovaga Warranty - Find Out More
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*All prices are in USD
Qty | Unit Price | Ext Price |
---|---|---|
1 | $1.872 | $1.872 |
10 | $1.613 | $16.130 |
30 | $1.451 | $43.530 |
100 | $1.284 | $128.400 |
500 | $1.210 | $605.000 |
1000 | $1.177 | $1177.000 |
In Stock:2680 PCS
UC3845BD1 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 |
---|---|---|---|
Pin Count | 8 | Package Category | Small Outline Packages |
Released Date | Apr 13, 2015 |
Shipping
Shipping Type | Ship Fee | Lead Time | |
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days | |
Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days | |
UPS | $20.00-$40.00 (0.50 KG) | 2-5 days | |
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. | |
Paypal | charge 4.0% service fee. | |
Credit Card | charge 3.5% service fee. | |
Western Union | charge US.00 banking fee. | |
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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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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The UC3845BD1 is a pulse width modulation (pwm) controller chip used in power supply applications. it is commonly used in switch-mode power supplies to regulate the voltage output by adjusting the duty cycle of a transistor. the chip provides several protection features and can be easily integrated into various power supply designs.
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Equivalent
Possible equivalent products of the UC3845BD1 chip include uc3845b, UC3845BD1r2g, and UC3845BD1013tr. -
Features
The UC3845BD1 is a pwm controller with integrated high-voltage startup and current sense functionality. it offers features like cycle-by-cycle current limiting, soft start, and a programmable oscillator frequency. it has a wide operating voltage range, from 8v to 30v, making it suitable for various power supply applications. -
Pinout
The UC3845BD1 is a pulse width modulation (pwm) controller. it has 8 pins, including input voltage, ground, error amplifier inputs, oscillator timing components, and output for driving power mosfets. -
Manufacturer
The manufacturer of the UC3845BD1 is texas instruments. it is an american semiconductor company that designs and manufactures integrated circuits used in various electronic devices. -
Application Field
The UC3845BD1 is a current mode pwm controller primarily used in offline and dc-dc converter applications. its primary function is to control the duty cycle of the power switch in these converters, making it suitable for various power supply designs, including battery chargers, motor control circuits, and switch-mode power supplies. -
Package
The UC3845BD1 chip is in a dip (dual inline package) form, with a size of 0.300-inch-wide standard.
Datasheet PDF
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